boostorg/conversion
1
0
Fork 1
mirror of https://github.com/boostorg/conversion.git synced 2025-08-03 22:44:32 +02:00
Code Issues Packages Projects Releases Wiki Activity

Quickbook: Copy trunk libs into quickbook-dev branch.

Browse Source 
[SVN r75213]
This commit is contained in:
Daniel James
2011-11-01 13:04:29 +00:00
parent f9fd2d3e7c c07cbcee5c
commit c4e1e924ce
14 changed files with 1714 additions and 315 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
doc/Jamfile.v2 Normal file
View File

@@ -0,0 +1,16 @@
# Copyright Antony Polukhin 2011. Use, modification, and distribution are
# subject to the Boost Software License, Version 1.0. (See accompanying
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
using quickbook ;
import boostbook : boostbook ;
xml lexical_cast : lexical_cast.qbk ;
boostbook standalone
:
lexical_cast
:
<xsl:param>boost.root=../../../..
<format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/doc/html
;

607
doc/lexical_cast.qbk Normal file
View File

@@ -0,0 +1,607 @@
[library Boost.Lexical_Cast
[quickbook 1.5]
[version 1.0]
[copyright 2000-2005 Kevlin Henney]
[copyright 2006-2010 Alexander Nasonov]
[copyright 2011 Antony Polukhin]
[category String and text processing]
[category Miscellaneous]
[license
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
[@http://www.boost.org/LICENSE_1_0.txt])
]
]
[def __numericcast__ [@boost:libs/numeric/conversion/doc/html/boost_numericconversion/improved_numeric_cast__.html `boost::numeric_cast`]]
[def __proposallong__ [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1973.html Lexical Conversion Library Proposal for TR2, N1973 by Kevlin Henney and Beman Dawes]]
[def __proposalshort__ [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1973.html Lexical Conversion Library Proposal for TR2, N1973]]
[section Motivation]
Sometimes a value must be converted to a literal text form, such as an [c++] `int` represented as a `std::string`, or vice-versa, when a `std::string` is interpreted as an `int`. Such examples are common when converting between data types internal to a program and representation external to a program, such as windows and configuration files.
The standard C and C++ libraries offer a number of facilities for performing such conversions. However, they vary with their ease of use, extensibility, and safety.
For instance, there are a number of limitations with the family of standard C functions typified by `atoi`:
* Conversion is supported in one direction only: from text to internal data type. Converting the other way using the C library requires either the inconvenience and compromised safety of the `sprintf` function, or the loss of portability associated with non-standard functions such as `itoa`.
* The range of types supported is only a subset of the built-in numeric types, namely `int`, `long`, and `double`.
* The range of types cannot be extended in a uniform manner. For instance, conversion from string representation to complex or rational.
The standard C functions typified by `strtol` have the same basic limitations, but offer finer control over the conversion process. However, for the common case such control is often either not required or not used. The `scanf` family of functions offer even greater control, but also lack safety and ease of use.
The standard C++ library offers `stringstream` for the kind of in-core formatting being discussed. It offers a great deal of control over the formatting and conversion of I/O to and from arbitrary types through text. However, for simple conversions direct use of `stringstream` can be either clumsy (with the introduction of extra local variables and the loss of infix-expression convenience) or obscure (where `stringstream` objects are created as temporary objects in an expression). Facets provide a comprehensive concept and facility for controlling textual representation, but their perceived complexity and high entry level requires an extreme degree of involvement for simple conversions, and excludes all but a few programmers.
The `lexical_cast` function template offers a convenient and consistent form for supporting common conversions to and from arbitrary types when they are represented as text. The simplification it offers is in expression-level convenience for such conversions. For more involved conversions, such as where precision or formatting need tighter control than is offered by the default behavior of `lexical_cast`, the conventional `std::stringstream` approach is recommended. Where the conversions are numeric to numeric, __numericcast__ may offer more reasonable behavior than `lexical_cast`.
For a good discussion of the options and issues involved in string-based formatting, including comparison of `stringstream`, `lexical_cast`, and others, see Herb Sutter's article, [@http://www.gotw.ca/publications/mill19.htm The String Formatters of Manor Farm]. Also, take a look at the [link boost_lexical_cast.performance Performance] section.
[endsect]
[section Examples]
The following example treats command line arguments as a sequence of numeric data:
``
int main(int argc, char * argv[])
{
using boost::lexical_cast;
using boost::bad_lexical_cast;
std::vector<short> args;
while(*++argv)
{
try
{
args.push_back(lexical_cast<short>(*argv));
}
catch(bad_lexical_cast &)
{
args.push_back(0);
}
}
...
}
``
The following example uses numeric data in a string expression:
``
void log_message(const std::string &);
void log_errno(int yoko)
{
log_message("Error " + boost::lexical_cast<std::string>(yoko) + ": " + strerror(yoko));
}
``
[endsect]
[section Synopsis]
Library features defined in [@boost:boost/lexical_cast.hpp boost/lexical_cast.hpp]:
``
namespace boost
{
class bad_lexical_cast;
template<typename Target, typename Source>
Target lexical_cast(const Source& arg);
}
``
[section lexical_cast]
``
template<typename Target, typename Source>
Target lexical_cast(const Source& arg);
``
Returns the result of streaming arg into a standard library string-based stream and then out as a Target object. Where Target is either `std::string` or `std::wstring`, stream extraction takes the whole content of the string, including spaces, rather than relying on the default `operator>>` behavior. If the conversion is unsuccessful, a `bad_lexical_cast` exception is thrown.
The requirements on the argument and result types are:
* Source is OutputStreamable, meaning that an `operator<<` is defined that takes a `std::ostream` or `std::wostream` object on the left hand side and an instance of the argument type on the right.
* Target is InputStreamable, meaning that an `operator>>` is defined that takes a `std::istream` or `std::wistream` object on the left hand side and an instance of the result type on the right.
* Target is CopyConstructible [20.1.3].
* Target is DefaultConstructible, meaning that it is possible to default-initialize an object of that type [8.5, 20.1.4].
The character type of the underlying stream is assumed to be char unless either the Source or the Target requires wide-character streaming, in which case the underlying stream uses `wchar_t`. Source types that require wide-character streaming are `wchar_t`, `wchar_t *`, and `std::wstring`. Target types that require wide-character streaming are `wchar_t` and `std::wstring`.
Where a higher degree of control is required over conversions, `std::stringstream` and `std::wstringstream` offer a more appropriate path. Where non-stream-based conversions are required, `lexical_cast` is the wrong tool for the job and is not special-cased for such scenarios.
[endsect]
[section bad_lexical_cast]
``
class bad_lexical_cast : public std::bad_cast
{
public:
... // same member function interface as std::exception
};
``
Exception used to indicate runtime lexical_cast failure.
[endsect]
[endsect]
[section Frequently Asked Questions]
* [*Question:] Why does `lexical_cast<int8_t>("127")` throw `bad_lexical_cast`?
* [*Answer:] The type `int8_t` is a `typedef` to `char` or `signed char`. Lexical conversion to these types is simply reading a byte from source but since the source has more than one byte, the exception is thrown.
Please use other integer types such as `int` or `short int`. If bounds checking is important, you can also
call __numericcast__:
`numeric_cast<int8_t>(lexical_cast<int>("127"));`
[pre
]
* [*Question:] Why does `lexical_cast<unsigned char>("127")` throw `bad_lexical_cast`?
* [*Answer:] Lexical conversion to any char type is simply reading a byte from source. But since the source has more than one byte, the exception is thrown.
Please use other integer types such as `int` or `short int`. If bounds checking is important, you can also
call __numericcast__:
`numeric_cast<unsigned char>(lexical_cast<int>("127"));`
[pre
]
* [*Question:] What does `lexical_cast<std::string>` of an `int8_t` or `uint8_t` not do what I expect?
* [*Answer:] As above, note that int8_t and uint8_t are actually chars and are formatted as such. To avoid
this, cast to an integer type first: `lexical_cast<std::string>(static_cast<int>(n));`
[pre
]
* [*Question:] The implementation always resets the `ios_base::skipws` flag of an underlying stream object.
It breaks my `operator>>` that works only in presence of this flag. Can you remove code that resets the flag?
* [*Answer:] May be in a future version. There is no requirement in
__proposallong__ to reset the flag but
remember that __proposalshort__ is not yet accepted by the committee. By the way, it's a great opportunity to
make your `operator>>` conform to the standard.
Read a good C++ book, study `std::sentry` and [@boost:libs/io/doc/ios_state.html `ios_state_saver`].
[pre
]
* [*Question:] Why `std::cout << boost::lexical_cast<unsigned int>("-1");` does not throw, but outputs 4294967295?
* [*Answer:] `boost::lexical_cast` has the behavior of `std::stringstream`, which uses `num_get` functions of
`std::locale` to convert numbers. If we look at the Programming languages — C++, we'll see, that `num_get` uses
the rules of `scanf` for conversions. And in the C99 standard for unsigned input value minus sign is optional, so
if a negative number is read, no errors will arise and the result will be the two's complement.
[endsect]
[section Changes]
* [*boost 1.48.0 :]
* Added code to work with Inf and NaN on any platform.
* Better performance and less memory usage for conversions to float type (and to double type, if `sizeof(double) < sizeof(long double)`).
* [*boost 1.47.0 :]
* Optimizations for "C" and other locales without number grouping.
* Better performance and less memory usage for unsigned char and signed char conversions.
* Better performance and less memory usage for conversions to arithmetic types.
* Better performance and less memory usage for conversions from arithmetic type to arithmetic type.
* Directly construct Target from Source on some conversions (like conversions from string to string, from char array to string, from char to char and others).
* [*boost 1.34.0 :]
* Better performance for many combinations of Source and Target types. For more details refer to Alexander Nasonovs article [@http://accu.org/index.php/journals/1375 Fine Tuning for lexical_cast, Overload #74, August 2006] [@http://www.accu.org/var/uploads/journals/overload74.pdf (PDF)].
* [*boost 1.33.0 :]
* Call-by-const reference for the parameters. This requires partial specialization of class templates, so it doesn't work for MSVC 6, and it uses the original pass by value there.
* The MSVC 6 support is deprecated, and will be removed in a future Boost version.
* [*Earlier :]
* The previous version of lexical_cast used the default stream precision for reading and writing floating-point numbers. For numerics that have a corresponding specialization of `std::numeric_limits`, the current version now chooses a precision to match.
* The previous version of lexical_cast did not support conversion to or from any wide-character-based types. For compilers with full language and library support for wide characters, `lexical_cast` now supports conversions from `wchar_t`, `wchar_t *`, and `std::wstring` and to `wchar_t` and `std::wstring`.
* The previous version of `lexical_cast` assumed that the conventional stream extractor operators were sufficient for reading values. However, string I/O is asymmetric, with the result that spaces play the role of I/O separators rather than string content. The current version fixes this error for `std::string` and, where supported, `std::wstring`: `lexical_cast<std::string>("Hello, World")` succeeds instead of failing with a `bad_lexical_cast` exception.
* The previous version of `lexical_cast` allowed unsafe and meaningless conversions to pointers. The current version now throws a `bad_lexical_cast` for conversions to pointers: `lexical_cast<char *>("Goodbye, World")` now throws an exception instead of causing undefined behavior.
[endsect]
[section Performance]
In most cases `boost::lexical_cast` is faster than `scanf`, `printf`, `std::stringstream`. For more detailed info you can look at the tables below.
[section Tests description]
All the tests measure execution speed in milliseconds for 10000 iterations of the following code blocks:
[table:legend Tests source code
[[Test name] [Code]]
[[lexical_cast]
[``
_out = boost::lexical_cast<OUTTYPE>(_in);
``]
]
[[std::stringstream with construction]
[``
std::stringstream ss;
ss << _in;
if (ss.fail()) throw std::logic_error(descr);
ss >> _out;
if (ss.fail()) throw std::logic_error(descr);
``]
]
[[std::stringstream without construction]
[``
ss << _in; // ss is an instance of std::stringstream
if (ss.fail()) throw std::logic_error(descr);
ss >> _out;
if (ss.fail()) throw std::logic_error(descr);
/* reseting std::stringstream to use it again */
ss.str(std::string());
ss.clear();
``]
]
[[scanf/printf]
[``
typename OUTTYPE::value_type buffer[500];
sprintf( (char*)buffer, conv, _in);
_out = buffer;
``]
]
]
Fastest results are highlitened with "!!! *x* !!!".
Do not use this results to compare compilers, because tests were taken on different hardware.
[endsect]
[/ BEGIN of section, generated by performance measuring program ]
[section clang-linux-2.8][table:id Performance Table (clang-linux-2.8)
[[From->To] [lexical_cast] [std::stringstream with construction] [std::stringstream without construction][scanf/printf]]
[[ string->char ][ !!! *<1* !!! ][ 148 ][ 14 ][ 12 ]]
[[ string->signed char ][ !!! *<1* !!! ][ 97 ][ 8 ][ 7 ]]
[[ string->unsigned char ][ !!! *<1* !!! ][ 90 ][ 8 ][ 13 ]]
[[ string->int ][ !!! *4* !!! ][ 102 ][ 19 ][ 15 ]]
[[ string->short ][ !!! *4* !!! ][ 105 ][ 20 ][ 15 ]]
[[ string->long int ][ !!! *4* !!! ][ 105 ][ 19 ][ 15 ]]
[[ string->long long ][ !!! *4* !!! ][ 115 ][ 19 ][ 14 ]]
[[ string->unsigned int ][ !!! *4* !!! ][ 102 ][ 18 ][ 14 ]]
[[ string->unsigned short ][ !!! *4* !!! ][ 101 ][ 19 ][ 15 ]]
[[ string->unsigned long int ][ !!! *3* !!! ][ 107 ][ 20 ][ 14 ]]
[[ string->unsigned long long ][ !!! *3* !!! ][ 103 ][ 20 ][ 14 ]]
[[ string->bool ][ !!! *<1* !!! ][ 97 ][ 16 ][ 8 ]]
[[ string->float ][ !!! *21* !!! ][ 170 ][ 61 ][ 32 ]]
[[ string->double ][ !!! *18* !!! ][ 206 ][ 93 ][ 58 ]]
[[ string->long double ][ 135 ][ 221 ][ 94 ][ !!! *57* !!! ]]
[[ char->string ][ !!! *7* !!! ][ 100 ][ 17 ][ 13 ]]
[[ unsigned char->string ][ !!! *7* !!! ][ 99 ][ 18 ][ 16 ]]
[[ signed char->string ][ !!! *7* !!! ][ 101 ][ 17 ][ 12 ]]
[[ int->string ][ !!! *13* !!! ][ 110 ][ 23 ][ 15 ]]
[[ short->string ][ !!! *13* !!! ][ 112 ][ 24 ][ 18 ]]
[[ long int->string ][ !!! *13* !!! ][ 119 ][ 23 ][ 17 ]]
[[ long long->string ][ !!! *13* !!! ][ 110 ][ 23 ][ 18 ]]
[[ unsigned int->string ][ !!! *14* !!! ][ 113 ][ 24 ][ 17 ]]
[[ unsigned short->string ][ !!! *13* !!! ][ 108 ][ 24 ][ 17 ]]
[[ unsigned long int->string ][ !!! *13* !!! ][ 109 ][ 24 ][ 16 ]]
[[ unsigned long long->string ][ !!! *13* !!! ][ 110 ][ 23 ][ 17 ]]
[[ bool->string ][ !!! *7* !!! ][ 105 ][ 24 ][ 12 ]]
[[ float->string ][ 70 ][ 192 ][ 94 ][ !!! *49* !!! ]]
[[ double->string ][ 106 ][ 217 ][ 122 ][ !!! *76* !!! ]]
[[ long double->string ][ 120 ][ 219 ][ 123 ][ !!! *80* !!! ]]
[[ char*->char ][ !!! *2* !!! ][ 90 ][ 9 ][ 8 ]]
[[ char*->signed char ][ !!! *2* !!! ][ 87 ][ 10 ][ 7 ]]
[[ char*->unsigned char ][ !!! *3* !!! ][ 90 ][ 10 ][ 13 ]]
[[ char*->int ][ !!! *6* !!! ][ 107 ][ 21 ][ 15 ]]
[[ char*->short ][ !!! *6* !!! ][ 110 ][ 19 ][ 14 ]]
[[ char*->long int ][ !!! *6* !!! ][ 103 ][ 19 ][ 14 ]]
[[ char*->long long ][ !!! *7* !!! ][ 104 ][ 20 ][ 15 ]]
[[ char*->unsigned int ][ !!! *6* !!! ][ 101 ][ 20 ][ 15 ]]
[[ char*->unsigned short ][ !!! *7* !!! ][ 100 ][ 20 ][ 14 ]]
[[ char*->unsigned long int ][ !!! *6* !!! ][ 105 ][ 22 ][ 15 ]]
[[ char*->unsigned long long ][ !!! *7* !!! ][ 106 ][ 21 ][ 14 ]]
[[ char*->bool ][ !!! *2* !!! ][ 99 ][ 18 ][ 7 ]]
[[ char*->float ][ !!! *22* !!! ][ 159 ][ 67 ][ 33 ]]
[[ char*->double ][ !!! *20* !!! ][ 205 ][ 94 ][ 58 ]]
[[ char*->long double ][ 140 ][ 214 ][ 95 ][ !!! *58* !!! ]]
[[ unsigned char*->char ][ !!! *2* !!! ][ 92 ][ 9 ][ 7 ]]
[[ unsigned char*->signed char ][ !!! *2* !!! ][ 89 ][ 10 ][ 7 ]]
[[ unsigned char*->unsigned char ][ !!! *2* !!! ][ 89 ][ 10 ][ 14 ]]
[[ unsigned char*->int ][ !!! *6* !!! ][ 104 ][ 20 ][ 14 ]]
[[ unsigned char*->short ][ !!! *6* !!! ][ 106 ][ 21 ][ 14 ]]
[[ unsigned char*->long int ][ !!! *6* !!! ][ 105 ][ 19 ][ 14 ]]
[[ unsigned char*->long long ][ !!! *6* !!! ][ 106 ][ 20 ][ 15 ]]
[[ unsigned char*->unsigned int ][ !!! *7* !!! ][ 105 ][ 19 ][ 14 ]]
[[ unsigned char*->unsigned short ][ !!! *6* !!! ][ 103 ][ 19 ][ 14 ]]
[[ unsigned char*->unsigned long int ][ !!! *6* !!! ][ 106 ][ 19 ][ 14 ]]
[[ unsigned char*->unsigned long long ][ !!! *6* !!! ][ 104 ][ 21 ][ 15 ]]
[[ unsigned char*->bool ][ !!! *2* !!! ][ 102 ][ 18 ][ 7 ]]
[[ unsigned char*->float ][ !!! *23* !!! ][ 160 ][ 66 ][ 32 ]]
[[ unsigned char*->double ][ !!! *20* !!! ][ 201 ][ 95 ][ 58 ]]
[[ unsigned char*->long double ][ 144 ][ 221 ][ 95 ][ !!! *60* !!! ]]
[[ unsigned char*->string ][ !!! *12* !!! ][ 104 ][ 23 ][ --- ]]
[[ signed char*->char ][ !!! *2* !!! ][ 90 ][ 9 ][ 7 ]]
[[ signed char*->signed char ][ !!! *2* !!! ][ 89 ][ 9 ][ 7 ]]
[[ signed char*->unsigned char ][ !!! *2* !!! ][ 89 ][ 10 ][ 13 ]]
[[ signed char*->int ][ !!! *6* !!! ][ 106 ][ 19 ][ 15 ]]
[[ signed char*->short ][ !!! *6* !!! ][ 107 ][ 20 ][ 15 ]]
[[ signed char*->long int ][ !!! *6* !!! ][ 103 ][ 19 ][ 14 ]]
[[ signed char*->long long ][ !!! *6* !!! ][ 103 ][ 19 ][ 14 ]]
[[ signed char*->unsigned int ][ !!! *6* !!! ][ 101 ][ 19 ][ 15 ]]
[[ signed char*->unsigned short ][ !!! *6* !!! ][ 101 ][ 19 ][ 16 ]]
[[ signed char*->unsigned long int ][ !!! *6* !!! ][ 105 ][ 22 ][ 15 ]]
[[ signed char*->unsigned long long ][ !!! *6* !!! ][ 104 ][ 21 ][ 15 ]]
[[ signed char*->bool ][ !!! *2* !!! ][ 100 ][ 18 ][ 7 ]]
[[ signed char*->float ][ !!! *23* !!! ][ 161 ][ 62 ][ 32 ]]
[[ signed char*->double ][ !!! *20* !!! ][ 207 ][ 102 ][ 57 ]]
[[ signed char*->long double ][ 144 ][ 216 ][ 96 ][ !!! *63* !!! ]]
[[ signed char*->string ][ !!! *12* !!! ][ 104 ][ 23 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 110 ][ 22 ][ --- ]]
[[ float->double ][ !!! *<1* !!! ][ 223 ][ 113 ][ --- ]]
[[ double->double ][ !!! *<1* !!! ][ 227 ][ 111 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 231 ][ 122 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 229 ][ 121 ][ --- ]]
[[ char->unsigned char ][ !!! *<1* !!! ][ 90 ][ 8 ][ --- ]]
[[ char->signed char ][ !!! *<1* !!! ][ 88 ][ 8 ][ --- ]]
[[ unsigned char->char ][ !!! *<1* !!! ][ 89 ][ 8 ][ --- ]]
[[ signed char->char ][ !!! *<1* !!! ][ 91 ][ 9 ][ --- ]]
]
[endsect]
[section gcc-4.4][table:id Performance Table (gcc-4.4)
[[From->To] [lexical_cast] [std::stringstream with construction] [std::stringstream without construction][scanf/printf]]
[[ string->char ][ !!! *<1* !!! ][ 90 ][ 7 ][ 7 ]]
[[ string->signed char ][ !!! *<1* !!! ][ 88 ][ 7 ][ 8 ]]
[[ string->unsigned char ][ !!! *<1* !!! ][ 88 ][ 8 ][ 14 ]]
[[ string->int ][ !!! *3* !!! ][ 103 ][ 18 ][ 15 ]]
[[ string->short ][ !!! *3* !!! ][ 105 ][ 20 ][ 15 ]]
[[ string->long int ][ !!! *3* !!! ][ 101 ][ 18 ][ 16 ]]
[[ string->long long ][ !!! *3* !!! ][ 101 ][ 18 ][ 15 ]]
[[ string->unsigned int ][ !!! *3* !!! ][ 98 ][ 23 ][ 14 ]]
[[ string->unsigned short ][ !!! *3* !!! ][ 100 ][ 17 ][ 14 ]]
[[ string->unsigned long int ][ !!! *3* !!! ][ 100 ][ 21 ][ 15 ]]
[[ string->unsigned long long ][ !!! *3* !!! ][ 99 ][ 19 ][ 15 ]]
[[ string->bool ][ !!! *<1* !!! ][ 95 ][ 16 ][ 8 ]]
[[ string->float ][ !!! *13* !!! ][ 160 ][ 61 ][ 33 ]]
[[ string->double ][ !!! *14* !!! ][ 206 ][ 93 ][ 59 ]]
[[ string->long double ][ 128 ][ 217 ][ 96 ][ !!! *61* !!! ]]
[[ char->string ][ !!! *7* !!! ][ 100 ][ 17 ][ 12 ]]
[[ unsigned char->string ][ !!! *7* !!! ][ 109 ][ 17 ][ 16 ]]
[[ signed char->string ][ !!! *7* !!! ][ 99 ][ 17 ][ 12 ]]
[[ int->string ][ !!! *13* !!! ][ 110 ][ 21 ][ 15 ]]
[[ short->string ][ !!! *14* !!! ][ 110 ][ 22 ][ 17 ]]
[[ long int->string ][ !!! *14* !!! ][ 109 ][ 21 ][ 16 ]]
[[ long long->string ][ !!! *13* !!! ][ 114 ][ 20 ][ 17 ]]
[[ unsigned int->string ][ !!! *13* !!! ][ 109 ][ 23 ][ 15 ]]
[[ unsigned short->string ][ !!! *14* !!! ][ 109 ][ 23 ][ 17 ]]
[[ unsigned long int->string ][ !!! *13* !!! ][ 112 ][ 23 ][ 16 ]]
[[ unsigned long long->string ][ !!! *14* !!! ][ 109 ][ 21 ][ 17 ]]
[[ bool->string ][ !!! *7* !!! ][ 108 ][ 23 ][ 11 ]]
[[ float->string ][ 63 ][ 185 ][ 92 ][ !!! *50* !!! ]]
[[ double->string ][ 106 ][ 216 ][ 116 ][ !!! *75* !!! ]]
[[ long double->string ][ 118 ][ 219 ][ 119 ][ !!! *80* !!! ]]
[[ char*->char ][ !!! *1* !!! ][ 93 ][ 9 ][ 9 ]]
[[ char*->signed char ][ !!! *1* !!! ][ 92 ][ 9 ][ 9 ]]
[[ char*->unsigned char ][ !!! *1* !!! ][ 92 ][ 9 ][ 14 ]]
[[ char*->int ][ !!! *4* !!! ][ 107 ][ 19 ][ 15 ]]
[[ char*->short ][ !!! *5* !!! ][ 109 ][ 19 ][ 15 ]]
[[ char*->long int ][ !!! *4* !!! ][ 113 ][ 19 ][ 15 ]]
[[ char*->long long ][ !!! *4* !!! ][ 108 ][ 20 ][ 15 ]]
[[ char*->unsigned int ][ !!! *4* !!! ][ 106 ][ 19 ][ 15 ]]
[[ char*->unsigned short ][ !!! *4* !!! ][ 106 ][ 18 ][ 15 ]]
[[ char*->unsigned long int ][ !!! *4* !!! ][ 103 ][ 22 ][ 15 ]]
[[ char*->unsigned long long ][ !!! *4* !!! ][ 105 ][ 20 ][ 15 ]]
[[ char*->bool ][ !!! *1* !!! ][ 104 ][ 18 ][ 8 ]]
[[ char*->float ][ !!! *15* !!! ][ 164 ][ 62 ][ 33 ]]
[[ char*->double ][ !!! *16* !!! ][ 203 ][ 97 ][ 58 ]]
[[ char*->long double ][ 132 ][ 223 ][ 98 ][ !!! *60* !!! ]]
[[ unsigned char*->char ][ !!! *2* !!! ][ 90 ][ 9 ][ 8 ]]
[[ unsigned char*->signed char ][ !!! *2* !!! ][ 92 ][ 10 ][ 8 ]]
[[ unsigned char*->unsigned char ][ !!! *2* !!! ][ 91 ][ 9 ][ 14 ]]
[[ unsigned char*->int ][ !!! *6* !!! ][ 106 ][ 20 ][ 15 ]]
[[ unsigned char*->short ][ !!! *6* !!! ][ 106 ][ 21 ][ 15 ]]
[[ unsigned char*->long int ][ !!! *6* !!! ][ 111 ][ 19 ][ 15 ]]
[[ unsigned char*->long long ][ !!! *6* !!! ][ 107 ][ 20 ][ 15 ]]
[[ unsigned char*->unsigned int ][ !!! *6* !!! ][ 105 ][ 19 ][ 15 ]]
[[ unsigned char*->unsigned short ][ !!! *6* !!! ][ 103 ][ 18 ][ 15 ]]
[[ unsigned char*->unsigned long int ][ !!! *6* !!! ][ 106 ][ 22 ][ 14 ]]
[[ unsigned char*->unsigned long long ][ !!! *6* !!! ][ 105 ][ 20 ][ 14 ]]
[[ unsigned char*->bool ][ !!! *2* !!! ][ 106 ][ 18 ][ 8 ]]
[[ unsigned char*->float ][ !!! *15* !!! ][ 167 ][ 68 ][ 33 ]]
[[ unsigned char*->double ][ !!! *17* !!! ][ 203 ][ 99 ][ 58 ]]
[[ unsigned char*->long double ][ 129 ][ 216 ][ 97 ][ !!! *61* !!! ]]
[[ unsigned char*->string ][ !!! *13* !!! ][ 111 ][ 23 ][ --- ]]
[[ signed char*->char ][ !!! *2* !!! ][ 92 ][ 9 ][ 8 ]]
[[ signed char*->signed char ][ !!! *2* !!! ][ 91 ][ 9 ][ 8 ]]
[[ signed char*->unsigned char ][ !!! *2* !!! ][ 91 ][ 9 ][ 14 ]]
[[ signed char*->int ][ !!! *6* !!! ][ 107 ][ 19 ][ 15 ]]
[[ signed char*->short ][ !!! *6* !!! ][ 109 ][ 24 ][ 14 ]]
[[ signed char*->long int ][ !!! *6* !!! ][ 112 ][ 19 ][ 15 ]]
[[ signed char*->long long ][ !!! *5* !!! ][ 107 ][ 20 ][ 15 ]]
[[ signed char*->unsigned int ][ !!! *6* !!! ][ 108 ][ 20 ][ 15 ]]
[[ signed char*->unsigned short ][ !!! *6* !!! ][ 104 ][ 18 ][ 15 ]]
[[ signed char*->unsigned long int ][ !!! *6* !!! ][ 102 ][ 22 ][ 15 ]]
[[ signed char*->unsigned long long ][ !!! *6* !!! ][ 104 ][ 20 ][ 15 ]]
[[ signed char*->bool ][ !!! *2* !!! ][ 104 ][ 18 ][ 8 ]]
[[ signed char*->float ][ !!! *16* !!! ][ 165 ][ 63 ][ 33 ]]
[[ signed char*->double ][ !!! *16* !!! ][ 203 ][ 98 ][ 59 ]]
[[ signed char*->long double ][ 129 ][ 215 ][ 98 ][ !!! *61* !!! ]]
[[ signed char*->string ][ !!! *13* !!! ][ 109 ][ 21 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 109 ][ 21 ][ --- ]]
[[ float->double ][ !!! *<1* !!! ][ 221 ][ 102 ][ --- ]]
[[ double->double ][ !!! *<1* !!! ][ 223 ][ 103 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 231 ][ 115 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 231 ][ 115 ][ --- ]]
[[ char->unsigned char ][ !!! *<1* !!! ][ 92 ][ 8 ][ --- ]]
[[ char->signed char ][ !!! *<1* !!! ][ 88 ][ 8 ][ --- ]]
[[ unsigned char->char ][ !!! *<1* !!! ][ 88 ][ 7 ][ --- ]]
[[ signed char->char ][ !!! *<1* !!! ][ 89 ][ 8 ][ --- ]]
]
[endsect]
[section gcc-4.5][table:id Performance Table (gcc-4.5)
[[From->To] [lexical_cast] [std::stringstream with construction] [std::stringstream without construction][scanf/printf]]
[[ string->char ][ !!! *<1* !!! ][ 91 ][ 8 ][ 7 ]]
[[ string->signed char ][ !!! *<1* !!! ][ 91 ][ 8 ][ 7 ]]
[[ string->unsigned char ][ !!! *<1* !!! ][ 90 ][ 8 ][ 13 ]]
[[ string->int ][ !!! *3* !!! ][ 100 ][ 20 ][ 14 ]]
[[ string->short ][ !!! *3* !!! ][ 106 ][ 20 ][ 14 ]]
[[ string->long int ][ !!! *3* !!! ][ 100 ][ 18 ][ 14 ]]
[[ string->long long ][ !!! *9* !!! ][ 100 ][ 18 ][ 15 ]]
[[ string->unsigned int ][ !!! *3* !!! ][ 97 ][ 20 ][ 14 ]]
[[ string->unsigned short ][ !!! *3* !!! ][ 102 ][ 17 ][ 14 ]]
[[ string->unsigned long int ][ !!! *3* !!! ][ 97 ][ 21 ][ 14 ]]
[[ string->unsigned long long ][ !!! *3* !!! ][ 97 ][ 19 ][ 14 ]]
[[ string->bool ][ !!! *<1* !!! ][ 95 ][ 16 ][ 7 ]]
[[ string->float ][ !!! *15* !!! ][ 157 ][ 63 ][ 32 ]]
[[ string->double ][ !!! *17* !!! ][ 203 ][ 95 ][ 59 ]]
[[ string->long double ][ 129 ][ 216 ][ 93 ][ !!! *58* !!! ]]
[[ char->string ][ !!! *8* !!! ][ 100 ][ 17 ][ 10 ]]
[[ unsigned char->string ][ !!! *8* !!! ][ 96 ][ 18 ][ 16 ]]
[[ signed char->string ][ !!! *8* !!! ][ 96 ][ 18 ][ 10 ]]
[[ int->string ][ !!! *14* !!! ][ 105 ][ 22 ][ 15 ]]
[[ short->string ][ !!! *14* !!! ][ 107 ][ 23 ][ 17 ]]
[[ long int->string ][ !!! *14* !!! ][ 109 ][ 22 ][ 17 ]]
[[ long long->string ][ !!! *14* !!! ][ 105 ][ 22 ][ 18 ]]
[[ unsigned int->string ][ !!! *14* !!! ][ 105 ][ 25 ][ 15 ]]
[[ unsigned short->string ][ !!! *15* !!! ][ 105 ][ 23 ][ 17 ]]
[[ unsigned long int->string ][ !!! *14* !!! ][ 109 ][ 24 ][ 17 ]]
[[ unsigned long long->string ][ !!! *14* !!! ][ 102 ][ 23 ][ 17 ]]
[[ bool->string ][ !!! *8* !!! ][ 104 ][ 23 ][ 12 ]]
[[ float->string ][ 66 ][ 181 ][ 92 ][ !!! *49* !!! ]]
[[ double->string ][ 107 ][ 215 ][ 120 ][ !!! *75* !!! ]]
[[ long double->string ][ 117 ][ 221 ][ 125 ][ !!! *79* !!! ]]
[[ char*->char ][ !!! *1* !!! ][ 89 ][ 9 ][ 7 ]]
[[ char*->signed char ][ !!! *1* !!! ][ 90 ][ 9 ][ 7 ]]
[[ char*->unsigned char ][ !!! *2* !!! ][ 90 ][ 9 ][ 13 ]]
[[ char*->int ][ !!! *7* !!! ][ 103 ][ 20 ][ 15 ]]
[[ char*->short ][ !!! *6* !!! ][ 102 ][ 29 ][ 14 ]]
[[ char*->long int ][ !!! *7* !!! ][ 101 ][ 20 ][ 15 ]]
[[ char*->long long ][ !!! *6* !!! ][ 102 ][ 20 ][ 14 ]]
[[ char*->unsigned int ][ !!! *6* !!! ][ 99 ][ 19 ][ 14 ]]
[[ char*->unsigned short ][ !!! *6* !!! ][ 101 ][ 18 ][ 14 ]]
[[ char*->unsigned long int ][ !!! *6* !!! ][ 102 ][ 22 ][ 14 ]]
[[ char*->unsigned long long ][ !!! *6* !!! ][ 101 ][ 21 ][ 14 ]]
[[ char*->bool ][ !!! *3* !!! ][ 98 ][ 18 ][ 7 ]]
[[ char*->float ][ !!! *18* !!! ][ 162 ][ 63 ][ 31 ]]
[[ char*->double ][ !!! *17* !!! ][ 203 ][ 96 ][ 58 ]]
[[ char*->long double ][ 135 ][ 214 ][ 98 ][ !!! *58* !!! ]]
[[ unsigned char*->char ][ !!! *2* !!! ][ 87 ][ 9 ][ 7 ]]
[[ unsigned char*->signed char ][ !!! *2* !!! ][ 87 ][ 9 ][ 7 ]]
[[ unsigned char*->unsigned char ][ !!! *3* !!! ][ 87 ][ 9 ][ 13 ]]
[[ unsigned char*->int ][ !!! *6* !!! ][ 105 ][ 20 ][ 14 ]]
[[ unsigned char*->short ][ !!! *6* !!! ][ 102 ][ 21 ][ 14 ]]
[[ unsigned char*->long int ][ !!! *6* !!! ][ 101 ][ 20 ][ 14 ]]
[[ unsigned char*->long long ][ !!! *6* !!! ][ 102 ][ 20 ][ 14 ]]
[[ unsigned char*->unsigned int ][ !!! *6* !!! ][ 99 ][ 19 ][ 14 ]]
[[ unsigned char*->unsigned short ][ !!! *6* !!! ][ 100 ][ 18 ][ 14 ]]
[[ unsigned char*->unsigned long int ][ !!! *6* !!! ][ 101 ][ 24 ][ 14 ]]
[[ unsigned char*->unsigned long long ][ !!! *6* !!! ][ 100 ][ 20 ][ 14 ]]
[[ unsigned char*->bool ][ !!! *3* !!! ][ 99 ][ 18 ][ 8 ]]
[[ unsigned char*->float ][ !!! *17* !!! ][ 164 ][ 64 ][ 32 ]]
[[ unsigned char*->double ][ !!! *18* !!! ][ 201 ][ 94 ][ 58 ]]
[[ unsigned char*->long double ][ 133 ][ 217 ][ 95 ][ !!! *60* !!! ]]
[[ unsigned char*->string ][ !!! *14* !!! ][ 103 ][ 23 ][ --- ]]
[[ signed char*->char ][ !!! *3* !!! ][ 88 ][ 10 ][ 8 ]]
[[ signed char*->signed char ][ !!! *2* !!! ][ 87 ][ 10 ][ 7 ]]
[[ signed char*->unsigned char ][ !!! *3* !!! ][ 87 ][ 9 ][ 13 ]]
[[ signed char*->int ][ !!! *6* !!! ][ 104 ][ 20 ][ 14 ]]
[[ signed char*->short ][ !!! *6* !!! ][ 105 ][ 21 ][ 14 ]]
[[ signed char*->long int ][ !!! *6* !!! ][ 104 ][ 20 ][ 15 ]]
[[ signed char*->long long ][ !!! *6* !!! ][ 106 ][ 20 ][ 14 ]]
[[ signed char*->unsigned int ][ !!! *6* !!! ][ 99 ][ 20 ][ 14 ]]
[[ signed char*->unsigned short ][ !!! *6* !!! ][ 100 ][ 18 ][ 14 ]]
[[ signed char*->unsigned long int ][ !!! *6* !!! ][ 102 ][ 23 ][ 14 ]]
[[ signed char*->unsigned long long ][ !!! *6* !!! ][ 103 ][ 20 ][ 14 ]]
[[ signed char*->bool ][ !!! *3* !!! ][ 99 ][ 18 ][ 7 ]]
[[ signed char*->float ][ !!! *18* !!! ][ 159 ][ 60 ][ 32 ]]
[[ signed char*->double ][ !!! *18* !!! ][ 203 ][ 95 ][ 57 ]]
[[ signed char*->long double ][ 129 ][ 213 ][ 97 ][ !!! *56* !!! ]]
[[ signed char*->string ][ !!! *14* !!! ][ 105 ][ 22 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 109 ][ 22 ][ --- ]]
[[ float->double ][ !!! *<1* !!! ][ 226 ][ 104 ][ --- ]]
[[ double->double ][ !!! *<1* !!! ][ 229 ][ 103 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 225 ][ 115 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 227 ][ 115 ][ --- ]]
[[ char->unsigned char ][ !!! *<1* !!! ][ 90 ][ 8 ][ --- ]]
[[ char->signed char ][ !!! *<1* !!! ][ 84 ][ 8 ][ --- ]]
[[ unsigned char->char ][ !!! *<1* !!! ][ 88 ][ 8 ][ --- ]]
[[ signed char->char ][ !!! *<1* !!! ][ 89 ][ 8 ][ --- ]]
]
[endsect]
[section gcc-4.6][table:id Performance Table (gcc-4.6)
[[From->To] [lexical_cast] [std::stringstream with construction] [std::stringstream without construction][scanf/printf]]
[[ string->char ][ !!! *<1* !!! ][ 94 ][ 8 ][ 7 ]]
[[ string->signed char ][ !!! *<1* !!! ][ 96 ][ 9 ][ 7 ]]
[[ string->unsigned char ][ !!! *<1* !!! ][ 96 ][ 8 ][ 13 ]]
[[ string->int ][ !!! *3* !!! ][ 110 ][ 18 ][ 16 ]]
[[ string->short ][ !!! *3* !!! ][ 111 ][ 18 ][ 16 ]]
[[ string->long int ][ !!! *3* !!! ][ 109 ][ 18 ][ 15 ]]
[[ string->long long ][ !!! *3* !!! ][ 111 ][ 18 ][ 15 ]]
[[ string->unsigned int ][ !!! *3* !!! ][ 110 ][ 20 ][ 15 ]]
[[ string->unsigned short ][ !!! *3* !!! ][ 111 ][ 18 ][ 15 ]]
[[ string->unsigned long int ][ !!! *3* !!! ][ 109 ][ 18 ][ 15 ]]
[[ string->unsigned long long ][ !!! *3* !!! ][ 114 ][ 19 ][ 15 ]]
[[ string->bool ][ !!! *<1* !!! ][ 106 ][ 17 ][ 8 ]]
[[ string->float ][ !!! *13* !!! ][ 175 ][ 70 ][ 33 ]]
[[ string->double ][ !!! *14* !!! ][ 182 ][ 81 ][ 58 ]]
[[ string->long double ][ 118 ][ 190 ][ 87 ][ !!! *58* !!! ]]
[[ char->string ][ !!! *8* !!! ][ 118 ][ 21 ][ 12 ]]
[[ unsigned char->string ][ !!! *8* !!! ][ 109 ][ 18 ][ 16 ]]
[[ signed char->string ][ !!! *8* !!! ][ 108 ][ 18 ][ 12 ]]
[[ int->string ][ 20 ][ 121 ][ 21 ][ !!! *16* !!! ]]
[[ short->string ][ !!! *15* !!! ][ 120 ][ 22 ][ 17 ]]
[[ long int->string ][ !!! *15* !!! ][ 120 ][ 22 ][ 16 ]]
[[ long long->string ][ !!! *15* !!! ][ 120 ][ 22 ][ 17 ]]
[[ unsigned int->string ][ !!! *15* !!! ][ 120 ][ 22 ][ 16 ]]
[[ unsigned short->string ][ !!! *15* !!! ][ 120 ][ 22 ][ 18 ]]
[[ unsigned long int->string ][ 16 ][ 118 ][ 22 ][ !!! *15* !!! ]]
[[ unsigned long long->string ][ !!! *15* !!! ][ 117 ][ 21 ][ 17 ]]
[[ bool->string ][ !!! *8* !!! ][ 117 ][ 23 ][ 10 ]]
[[ float->string ][ 77 ][ 218 ][ 105 ][ !!! *50* !!! ]]
[[ double->string ][ 108 ][ 247 ][ 129 ][ !!! *73* !!! ]]
[[ long double->string ][ 120 ][ 250 ][ 131 ][ !!! *79* !!! ]]
[[ char*->char ][ !!! *2* !!! ][ 99 ][ 9 ][ 7 ]]
[[ char*->signed char ][ !!! *2* !!! ][ 98 ][ 9 ][ 8 ]]
[[ char*->unsigned char ][ !!! *2* !!! ][ 98 ][ 9 ][ 13 ]]
[[ char*->int ][ !!! *6* !!! ][ 115 ][ 22 ][ 15 ]]
[[ char*->short ][ !!! *6* !!! ][ 114 ][ 22 ][ 15 ]]
[[ char*->long int ][ !!! *6* !!! ][ 114 ][ 22 ][ 16 ]]
[[ char*->long long ][ !!! *6* !!! ][ 119 ][ 22 ][ 15 ]]
[[ char*->unsigned int ][ !!! *6* !!! ][ 114 ][ 20 ][ 15 ]]
[[ char*->unsigned short ][ !!! *6* !!! ][ 116 ][ 20 ][ 15 ]]
[[ char*->unsigned long int ][ !!! *6* !!! ][ 117 ][ 22 ][ 15 ]]
[[ char*->unsigned long long ][ !!! *6* !!! ][ 118 ][ 22 ][ 15 ]]
[[ char*->bool ][ !!! *3* !!! ][ 113 ][ 18 ][ 8 ]]
[[ char*->float ][ !!! *15* !!! ][ 180 ][ 78 ][ 32 ]]
[[ char*->double ][ !!! *16* !!! ][ 185 ][ 89 ][ 58 ]]
[[ char*->long double ][ 119 ][ 193 ][ 91 ][ !!! *60* !!! ]]
[[ unsigned char*->char ][ !!! *2* !!! ][ 99 ][ 9 ][ 8 ]]
[[ unsigned char*->signed char ][ !!! *2* !!! ][ 99 ][ 10 ][ 8 ]]
[[ unsigned char*->unsigned char ][ !!! *2* !!! ][ 100 ][ 9 ][ 15 ]]
[[ unsigned char*->int ][ !!! *6* !!! ][ 118 ][ 22 ][ 15 ]]
[[ unsigned char*->short ][ !!! *6* !!! ][ 117 ][ 26 ][ 15 ]]
[[ unsigned char*->long int ][ !!! *6* !!! ][ 119 ][ 21 ][ 15 ]]
[[ unsigned char*->long long ][ !!! *6* !!! ][ 118 ][ 21 ][ 14 ]]
[[ unsigned char*->unsigned int ][ !!! *6* !!! ][ 115 ][ 22 ][ 14 ]]
[[ unsigned char*->unsigned short ][ !!! *6* !!! ][ 117 ][ 20 ][ 15 ]]
[[ unsigned char*->unsigned long int ][ !!! *6* !!! ][ 115 ][ 21 ][ 15 ]]
[[ unsigned char*->unsigned long long ][ !!! *6* !!! ][ 117 ][ 22 ][ 15 ]]
[[ unsigned char*->bool ][ !!! *3* !!! ][ 112 ][ 18 ][ 8 ]]
[[ unsigned char*->float ][ !!! *15* !!! ][ 181 ][ 78 ][ 33 ]]
[[ unsigned char*->double ][ !!! *16* !!! ][ 185 ][ 92 ][ 59 ]]
[[ unsigned char*->long double ][ 120 ][ 190 ][ 89 ][ !!! *58* !!! ]]
[[ unsigned char*->string ][ !!! *14* !!! ][ 121 ][ 22 ][ --- ]]
[[ signed char*->char ][ !!! *2* !!! ][ 99 ][ 9 ][ 9 ]]
[[ signed char*->signed char ][ !!! *2* !!! ][ 98 ][ 9 ][ 8 ]]
[[ signed char*->unsigned char ][ !!! *2* !!! ][ 98 ][ 9 ][ 14 ]]
[[ signed char*->int ][ !!! *6* !!! ][ 119 ][ 22 ][ 16 ]]
[[ signed char*->short ][ !!! *6* !!! ][ 115 ][ 22 ][ 15 ]]
[[ signed char*->long int ][ !!! *6* !!! ][ 119 ][ 22 ][ 15 ]]
[[ signed char*->long long ][ !!! *6* !!! ][ 117 ][ 22 ][ 15 ]]
[[ signed char*->unsigned int ][ !!! *6* !!! ][ 117 ][ 23 ][ 15 ]]
[[ signed char*->unsigned short ][ !!! *6* !!! ][ 117 ][ 21 ][ 14 ]]
[[ signed char*->unsigned long int ][ !!! *7* !!! ][ 119 ][ 24 ][ 15 ]]
[[ signed char*->unsigned long long ][ !!! *6* !!! ][ 116 ][ 22 ][ 15 ]]
[[ signed char*->bool ][ !!! *3* !!! ][ 111 ][ 18 ][ 8 ]]
[[ signed char*->float ][ !!! *16* !!! ][ 180 ][ 78 ][ 33 ]]
[[ signed char*->double ][ !!! *16* !!! ][ 185 ][ 89 ][ 59 ]]
[[ signed char*->long double ][ 120 ][ 191 ][ 91 ][ !!! *59* !!! ]]
[[ signed char*->string ][ !!! *14* !!! ][ 122 ][ 23 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 120 ][ 22 ][ --- ]]
[[ float->double ][ !!! *<1* !!! ][ 242 ][ 115 ][ --- ]]
[[ double->double ][ !!! *<1* !!! ][ 243 ][ 115 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 265 ][ 141 ][ --- ]]
[[ int->int ][ !!! *<1* !!! ][ 266 ][ 140 ][ --- ]]
[[ char->unsigned char ][ !!! *<1* !!! ][ 95 ][ 8 ][ --- ]]
[[ char->signed char ][ !!! *<1* !!! ][ 95 ][ 8 ][ --- ]]
[[ unsigned char->char ][ !!! *<1* !!! ][ 94 ][ 8 ][ --- ]]
[[ signed char->char ][ !!! *<1* !!! ][ 94 ][ 8 ][ --- ]]
]
[endsect]
[/ END of section, generated by performance measuring program ]
[endsect]

2
index.html
View File

@@ -24,7 +24,7 @@ supplied by several headers:</p>
and <b>polymorphic_downcast&lt;&gt;</b> to perform safe casting between
polymorphic types.<br>
</li>
<li>The <a href="lexical_cast.htm">boost/lexical_cast</a> header provides <b>lexical_cast&lt;&gt;</b>
<li>The <a href="../../doc/html/boost_lexical_cast.html">boost/lexical_cast</a> header provides <b>lexical_cast&lt;&gt;</b>
general literal text conversions, such as an <code>int</code> represented as
a <code>string</code>, or vice-versa.</li>
</ul>

293
lexical_cast.htm
View File

@@ -1,281 +1,16 @@
<!-- saved from url=(0022)http://internet.e-mail -->
<!doctype html public "-//W3C//DTD HTML Transitional 4.0//EN">
<!--
Copyright 2005-2007 Daniel James.
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-->
<html>
<head>
<title>lexical_cast</title>
<meta name="author" content="Kevlin Henney, mailto:kevlin@curbralan.com">
<meta name="generator" content="Microsoft FrontPage 5.0">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<h1><img src="../../boost.png" alt="boost.png (6897 bytes)" align="center" width="277" height="86">Header
<a href="../../boost/lexical_cast.hpp">boost/lexical_cast.hpp</a></h1>
<ul type="square">
<li>
<a href="#motivation">Motivation</a></li>
<li>
<a href="#examples">Examples</a></li>
<li>
<a href="#synopsis">Synopsis</a></li>
<li>
<a href="#lexical_cast"><code>lexical_cast</code></a></li>
<li>
<a href="#bad_lexical_cast"><code>bad_lexical_cast</code></a></li>
<li>
<a href="#faq">Frequently Asked Questions</a></li>
<li>
<a href="#references">References</a></li>
<li>
<a href="#changes">Changes</a></li>
</ul>
<hr>
<h2><a name="motivation">Motivation</a></h2>
Sometimes a value must be converted to a literal text form, such as an <code>int</code>
represented as a <code>string</code>, or vice-versa, when a <code>string</code>
is interpreted as an <code>int</code>. Such examples are common when converting
between data types internal to a program and representation external to a
program, such as windows and configuration files.
<p>
The standard C and C++ libraries offer a number of facilities for performing
such conversions. However, they vary with their ease of use, extensibility, and
safety.
<p>
For instance, there are a number of limitations with the family of standard C
functions typified by <code>atoi</code>:
<ul type="square">
<li>
Conversion is supported in one direction only: from text to internal data type.
Converting the other way using the C library requires either the inconvenience
and compromised safety of the <code>sprintf</code> function, or the loss of
portability associated with non-standard functions such as <code>itoa</code>.
</li>
<li>
The range of types supported is only a subset of the built-in numeric types,
namely <code>int</code>, <code>long</code>, and <code>double</code>.
</li>
<li>
The range of types cannot be extended in a uniform manner. For instance,
conversion from string representation to <code>complex</code> or <code>rational</code>.
</li>
</ul>
The standard C functions typified by <code>strtol</code> have the same basic
limitations, but offer finer control over the conversion process. However, for
the common case such control is often either not required or not used. The <code>scanf</code>
family of functions offer even greater control, but also lack safety and ease
of use.
<p>
The standard C++ library offers <code>stringstream</code> for the kind of
in-core formatting being discussed. It offers a great deal of control over the
formatting and conversion of I/O to and from arbitrary types through text.
However, for simple conversions direct use of <code>stringstream</code> can be
either clumsy (with the introduction of extra local variables and the loss of
infix-expression convenience) or obscure (where <code>stringstream</code>
objects are created as temporary objects in an expression). Facets provide a
comprehensive concept and facility for controlling textual representation, but
their perceived complexity and high entry level requires an extreme degree of
involvement for simple conversions, and excludes all but a few programmers.
<p>
The <code>lexical_cast</code> function template offers a convenient and
consistent form for supporting common conversions to and from arbitrary types
when they are represented as text. The simplification it offers is in
expression-level convenience for such conversions. For more involved
conversions, such as where precision or formatting need tighter control than is
offered by the default behavior of <code>lexical_cast</code>, the conventional <code>
stringstream</code> approach is recommended. Where the conversions are
numeric to numeric, <code><a href="../numeric/conversion/doc/html/boost_numericconversion/improved_numeric_cast__.html">numeric_cast</a></code>
may offer more reasonable behavior than <code>lexical_cast</code>.
<p>
For a good discussion of the options and issues involved in string-based
formatting, including comparison of <code>stringstream</code>, <code>lexical_cast</code>,
and others, see Herb Sutter's article, <a href="http://www.gotw.ca/publications/mill19.htm">
<i>The String Formatters of Manor Farm</i></a>.
<p>
<hr>
<h2><a name="examples">Examples</a></h2>
The following example treats command line arguments as a sequence of numeric
data: <blockquote>
<pre>int main(int argc, char * argv[])
{
using boost::lexical_cast;
using boost::bad_lexical_cast;
std::vector&lt;short&gt; args;
while(*++argv)
{
try
{
args.push_back(lexical_cast&lt;short&gt;(*argv));
}
catch(bad_lexical_cast &amp;)
{
args.push_back(0);
}
}
...
}
</pre>
</blockquote>The following example uses numeric data in a string expression: <blockquote>
<pre>void log_message(const std::string &amp;);
void log_errno(int yoko)
{
log_message(&quot;Error &quot; + boost::lexical_cast&lt;std::string&gt;(yoko) + &quot;: &quot; + strerror(yoko));
}
</pre>
</blockquote>
<hr>
<h2><a name="synopsis">Synopsis</a></h2>
Library features defined in <a href="../../boost/lexical_cast.hpp"><code>&quot;boost/lexical_cast.hpp&quot;</code></a>:
<blockquote>
<pre>namespace boost
{
class <a href="#bad_lexical_cast">bad_lexical_cast</a>;
template&lt;typename Target, typename Source&gt;
Target <a href="#lexical_cast">lexical_cast</a>(const Source&amp; arg);
}
</pre>
</blockquote>Unit test defined in <a href="lexical_cast_test.cpp"><code>&quot;lexical_cast_test.cpp&quot;</code></a>.
<p>
<hr>
<h2><a name="lexical_cast"><code>lexical_cast</code></a></h2>
<blockquote>
<pre>template&lt;typename Target, typename Source&gt;
Target lexical_cast(const Source&amp; arg);
</pre>
</blockquote>Returns the result of streaming <code>arg</code> into a
standard library string-based stream and then out as a <code>Target</code> object.
Where <code>Target</code> is either <code>std::string</code>
or <code>std::wstring</code>, stream extraction takes the whole content
of the string, including spaces, rather than relying on the default
<code>operator&gt;&gt;</code> behavior.
If the conversion is unsuccessful, a <a href="#bad_lexical_cast">
<code>bad_lexical_cast</code></a> exception is thrown.
<p>
The requirements on the argument and result types are:
<ul type="square">
<li>
<code>Source</code> is <i>OutputStreamable</i>, meaning that an <code>operator&lt;&lt;</code>
is defined that takes a <code>std::ostream</code> or <code>std::wostream</code> object on the
left hand side and an instance of the argument type on the right.
</li>
<li>
<code>Target</code> is <i>InputStreamable</i>, meaning that an <code>operator&gt;&gt;</code>
is defined that takes a <code>std::istream</code> or <code>std::wistream</code> object on the left hand side
and an instance of the result type on the right.
</li>
<li>
<code>Target</code> is <i>CopyConstructible</i> [20.1.3].
</li>
<li>
<code>Target</code> is <i>DefaultConstructible</i>, meaning that it is possible
to <i>default-initialize</i> an object of that type [8.5, 20.1.4].
</li>
</ul>
The character type of the underlying stream is assumed to be <code>char</code> unless
either the <code>Source</code> or the <code>Target</code> requires wide-character
streaming, in which case the underlying stream uses <code>wchar_t</code>.
<code>Source</code> types that require wide-character streaming are <code>wchar_t</code>,
<code>wchar_t *</code>, and <code>std::wstring</code>. <code>Target</code> types that
require wide-character streaming are <code>wchar_t</code> and <code>std::wstring</code>.
<p>
Where a higher degree of control is required over conversions, <code>std::stringstream</code>
and <code>std::wstringstream</code> offer a more appropriate path. Where non-stream-based conversions are
required, <code>lexical_cast</code>
is the wrong tool for the job and is not special-cased for such scenarios.
<p>
<hr>
<h2><a name="bad_lexical_cast"><code>bad_lexical_cast</code></a></h2>
<blockquote>
<pre>class bad_lexical_cast : public std::bad_cast
{
public:
... // <i>same member function interface as</i> std::exception
};
</pre>
</blockquote>Exception used to indicate runtime <a href="#lexical_cast"><code>lexical_cast</code></a>
failure.
<hr>
<h2><a name="BOOST_LEXICAL_CAST_ASSUME_C_LOCALE"><code>BOOST_LEXICAL_CAST_ASSUME_C_LOCALE</code></a></h2>
<blockquote><pre>#define BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
or,
g++ -DBOOST_LEXICAL_CAST_ASSUME_C_LOCALE ... (gcc on Linux/Unix)
cl.exe /DBOOST_LEXICAL_CAST_ASSUME_C_LOCALE ... (Visual C++ on Windows)
</pre>
Eliminate an overhead of <code>std::locale</code> if your program runs in the "C" locale. If the option is set but a program runs in other locale, <code>lexical_cast</code> result is unspecified.
<hr>
<h2><a name="faq">Frequently Asked Questions</h2>
<p> Q: Why does <code>lexical_cast&lt;int8_t&gt;("127")</code> throw <code>bad_lexical_cast</code>?
<br> A: The type <code>int8_t</code> is a typedef to <code>char</code> or <code>signed char</code>.
Lexical conversion to these types is simply reading a byte from source but since the source has
more than one byte, the exception is thrown.
<p>Please use other integer types such as <code>int</code> or <code>short int</code>. If bounds checking
is important, you can also call <a href="../../libs/numeric/conversion/doc/html/boost_numericconversion/improved_numeric_cast__.html">numeric_cast</a>:
<pre><a href="../../libs/numeric/conversion/doc/html/boost_numericconversion/improved_numeric_cast__.html">numeric_cast</a>&lt;int8_t&gt;(lexical_cast&lt;int&gt;("127"));</pre>
<p> Q: What does <code>lexical_cast&lt;std::string&gt;</code> of an <code>int8_t</code> or <code>uint8_t</code> not do what I expect?
<br> A: As above, note that <code>int8_t</code> and <code>uint8_t</code> are actually chars and are formatted as such. To avoid this, cast to an integer type first:
<pre>lexical_cast&lt;std::string&gt;(static_cast&lt;int&gt;(n));</pre>
<p> Q: The implementation always resets the <code>ios_base::skipws</code> flag of an underlying stream object. It breaks my <code>operator&gt;&gt;</code> that works only in presence of this flag. Can you remove code that resets the flag?
<br> A: May be in a future version. There is no requirement in <a href="#n1973">[N1973]</a> to reset the flag but remember that <a href="#n1973">[N1973]</a> is not yet accepted by the committee. By the way, it's a great opportunity to make your <code>operator&gt;&gt;</code> conform to the standard. Read a good C++ book, study <code>std::sentry</code> and <a href="../../libs/io/doc/ios_state.html">ios_state_saver</a>.
</ul>
<h2><a name="references">References</h2>
<ul type="square">
<a name="n1973"></a><li> [N1973] Kevlin Henney, Beman Dawes, Lexical Conversion Library Proposal for TR2,
<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1973.html">N1973</a>.
<a name="tuning"></a><li> [Tuning] Alexander Nasonov, Fine Tuning for lexical_cast,
<a href="http://accu.org/index.php/journals/1375">Overload #74</a> (<a href="http://www.accu.org/var/uploads/journals/overload74.pdf">PDF</a>),
August 2006.</li>
</ul>
<h2><a name="changes">Changes</a></h2>
<h3>August, October 2006:</h3>
<ul type="square">
<li>Better performance for many combinations of <code>Source</code> and <code>Target</code>
types. Refer to <a href="#tuning">[Tuning]</a> for more details.
</li>
</ul>
<h3>June 2005:</h3>
<ul type="square">
<li>Call-by-const reference for the parameters. This requires partial specialization
of class templates, so it doesn't work for MSVC 6, and it uses the original
pass by value there.<br>
</li>
<li>The MSVC 6 support is deprecated, and will be removed in a future Boost
version. </li>
</ul>
<h3>Earlier:</h3>
<ul type="square">
<li>The previous version of <code>lexical_cast</code> used the default stream
precision for reading and writing floating-point numbers. For numerics that
have a corresponding specialization of <code>std::numeric_limits</code>, the
current version now chooses a precision to match. <br>
<li>The previous version of <code>lexical_cast</code> did not support conversion
to or from any wide-character-based types. For compilers with full language
and library support for wide characters, <code>lexical_cast</code> now supports
conversions from <code>wchar_t</code>, <code>wchar_t *</code>, and <code>std::wstring</code>
and to <code>wchar_t</code> and <code>std::wstring</code>. <br>
<li>The previous version of <code>lexical_cast</code> assumed that the conventional
stream extractor operators were sufficient for reading values. However, string
I/O is asymmetric, with the result that spaces play the role of I/O separators
rather than string content. The current version fixes this error for <code>std::string</code>
and, where supported, <code>std::wstring</code>: <code>lexical_cast&lt;std::string&gt;("Hello,
World")</code> succeeds instead of failing with a <code>bad_lexical_cast</code>
exception. <br>
<li>The previous version of <code>lexical_cast</code> allowed unsafe and meaningless
conversions to pointers. The current version now throws a <code>bad_lexical_cast</code>
for conversions to pointers: <code>lexical_cast&lt;char *&gt;("Goodbye, World")</code>
now throws an exception instead of causing undefined behavior.
</ul>
<p>
<hr>
<div align="right"><small><i>&copy; Copyright Kevlin Henney, 2000&#150;2005</i></small></div>
</body>
<head>
<meta http-equiv="refresh" content="0; URL=../../doc/html/boost_lexical_cast.html">
</head>
<body>
Automatic redirection failed, please go to
<a href="../../doc/html/boost_lexical_cast.html">../../doc/html/boost_lexical_cast.html</a>
</body>
</html>

292
lexical_cast_test.cpp
View File

@@ -2,8 +2,9 @@
//
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Terje Sletteb<EFBFBD> and Kevlin Henney, 2005.
// Copyright Terje Sletteb and Kevlin Henney, 2005.
// Copyright Alexander Nasonov, 2006.
// Copyright Antony Polukhin, 2011.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
@@ -32,7 +33,9 @@
#include <boost/test/unit_test.hpp>
#include <boost/test/floating_point_comparison.hpp>
#include <boost/type_traits/integral_promotion.hpp>
#include <string>
#include <vector>
#include <memory>
#if (defined(BOOST_HAS_LONG_LONG) || defined(BOOST_HAS_MS_INT64)) \
@@ -40,6 +43,10 @@
#define LCAST_TEST_LONGLONG
#endif
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
template<class CharT>
struct my_traits : std::char_traits<CharT>
{
@@ -63,6 +70,7 @@ void test_conversion_to_char();
void test_conversion_to_int();
void test_conversion_to_double();
void test_conversion_to_bool();
void test_conversion_with_nonconst_char();
void test_conversion_to_string();
void test_conversion_from_to_wchar_t_alias();
void test_conversion_to_pointer();
@@ -90,10 +98,19 @@ void test_wtraits();
void test_allocator();
void test_wallocator();
#endif
void test_char_types_conversions();
void operators_overload_test();
#ifndef BOOST_NO_CHAR16_T
void test_char16_conversions();
#endif
#ifndef BOOST_NO_CHAR32_T
void test_char32_conversions();
#endif
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test_framework::test_suite *suite =
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast unit test");
suite->add(BOOST_TEST_CASE(test_conversion_to_char));
suite->add(BOOST_TEST_CASE(test_conversion_to_int));
@@ -102,6 +119,7 @@ unit_test::test_suite *init_unit_test_suite(int, char *[])
suite->add(BOOST_TEST_CASE(test_conversion_from_to_wchar_t_alias));
suite->add(BOOST_TEST_CASE(test_conversion_to_pointer));
suite->add(BOOST_TEST_CASE(test_conversion_to_string));
suite->add(BOOST_TEST_CASE(test_conversion_with_nonconst_char));
#ifndef BOOST_LCAST_NO_WCHAR_T
suite->add(BOOST_TEST_CASE(test_conversion_from_wchar_t));
suite->add(BOOST_TEST_CASE(test_conversion_to_wchar_t));
@@ -129,6 +147,15 @@ unit_test::test_suite *init_unit_test_suite(int, char *[])
suite->add(BOOST_TEST_CASE(&test_wallocator));
#endif
suite->add(BOOST_TEST_CASE(&test_char_types_conversions));
suite->add(BOOST_TEST_CASE(&operators_overload_test));
#ifndef BOOST_NO_CHAR16_T
suite->add(BOOST_TEST_CASE(&test_char16_conversions));
#endif
#ifndef BOOST_NO_CHAR32_T
suite->add(BOOST_TEST_CASE(&test_char32_conversions));
#endif
return suite;
}
@@ -190,19 +217,45 @@ void test_conversion_to_int()
lexical_cast<int>(std::string("Test")), bad_lexical_cast);
}
void test_conversion_with_nonconst_char()
{
std::vector<char> buffer;
buffer.push_back('1');
buffer.push_back('\0');
BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer[0]), 1);
std::vector<unsigned char> buffer2;
buffer2.push_back('1');
buffer2.push_back('\0');
BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer2[0]), 1);
std::vector<unsigned char> buffer3;
buffer3.push_back('1');
buffer3.push_back('\0');
BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer3[0]), 1);
#ifndef BOOST_LCAST_NO_WCHAR_T
std::vector<wchar_t> buffer4;
buffer4.push_back(L'1');
buffer4.push_back(L'\0');
BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer4[0]), 1);
#endif
}
void test_conversion_to_double()
{
BOOST_CHECK_CLOSE(1.0, lexical_cast<double>('1'), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>('1'), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_THROW(lexical_cast<double>('A'), bad_lexical_cast);
BOOST_CHECK_CLOSE(1.0, lexical_cast<double>(1), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE(1.23, lexical_cast<double>(1.23), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE(1.234567890, 1.234567890, std::numeric_limits<double>::epsilon());
BOOST_CHECK_CLOSE(1.0, lexical_cast<double>(true), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE(0.0, lexical_cast<double>(false), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE(1.23, lexical_cast<double>("1.23"), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>(1), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>(1.23), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(1.234567890, lexical_cast<double>(1.234567890), std::numeric_limits<double>::epsilon());
BOOST_CHECK_CLOSE_FRACTION(1.234567890, lexical_cast<double>("1.234567890"), std::numeric_limits<double>::epsilon());
BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>(true), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(0.0, lexical_cast<double>(false), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>("1.23"), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_THROW(lexical_cast<double>(""), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<double>("Test"), bad_lexical_cast);
BOOST_CHECK_CLOSE(1.23, lexical_cast<double>(std::string("1.23")), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>(std::string("1.23")), (std::numeric_limits<double>::epsilon()));
BOOST_CHECK_THROW(
lexical_cast<double>(std::string("")), bad_lexical_cast);
BOOST_CHECK_THROW(
@@ -229,10 +282,24 @@ void test_conversion_to_bool()
BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::string("1")));
BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::string("0")));
BOOST_CHECK_THROW(lexical_cast<bool>(1.0001L), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<bool>(2), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<bool>(2u), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<bool>(-1), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<bool>(-2), bad_lexical_cast);
BOOST_CHECK_THROW(
lexical_cast<bool>(std::string("")), bad_lexical_cast);
BOOST_CHECK_THROW(
lexical_cast<bool>(std::string("Test")), bad_lexical_cast);
BOOST_CHECK(lexical_cast<bool>("+1") == true );
BOOST_CHECK(lexical_cast<bool>("+0") == false );
BOOST_CHECK(lexical_cast<bool>("-0") == false );
BOOST_CHECK_THROW(lexical_cast<bool>("--0"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<bool>("-+-0"), bad_lexical_cast);
}
void test_conversion_to_string()
@@ -447,6 +514,24 @@ void test_conversion_from_integral_to_char(CharT zero)
BOOST_CHECK_THROW(lexical_cast<CharT>(t), bad_lexical_cast);
}
template<class T, class CharT>
void test_conversion_from_char_to_integral(CharT zero)
{
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 0)) == static_cast<T>(0) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 1)) == static_cast<T>(1) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 2)) == static_cast<T>(2) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 3)) == static_cast<T>(3) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 4)) == static_cast<T>(4) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 5)) == static_cast<T>(5) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 6)) == static_cast<T>(6) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 7)) == static_cast<T>(7) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 8)) == static_cast<T>(8) );
BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 9)) == static_cast<T>(9) );
BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero + 10)), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero - 1)), bad_lexical_cast);
}
template<class T>
void test_conversion_from_integral_to_integral()
{
@@ -510,7 +595,7 @@ void test_conversion_from_integral_to_string(CharT)
// Test values around zero:
if(limits::is_signed)
for(t = -counter; t < static_cast<T>(counter); ++t)
for(t = static_cast<T>(-counter); t < static_cast<T>(counter); ++t)
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
// Test values around 100, 1000, 10000, ...
@@ -540,25 +625,46 @@ void test_conversion_from_string_to_integral(CharT)
BOOST_CHECK_EQUAL(lexical_cast<T>(s), min_val);
if(limits::is_signed)
{
#if defined(BOOST_MSVC) && BOOST_MSVC == 1400
// VC++ 8.0 bug, see libs/conversion/test/lexical_cast_vc8_bug_test.cpp
if(sizeof(T) < sizeof(boost::intmax_t))
#endif
{
BOOST_CHECK_THROW(lexical_cast<T>(s + zero), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(s + nine), bad_lexical_cast);
}
BOOST_CHECK_THROW(lexical_cast<T>(s + zero), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(s + nine), bad_lexical_cast);
}
s = to_str<CharT>(max_val);
BOOST_CHECK_EQUAL(lexical_cast<T>(s), max_val);
#if defined(BOOST_MSVC) && BOOST_MSVC == 1400
// VC++ 8.0 bug, see libs/conversion/test/lexical_cast_vc8_bug_test.cpp
if(sizeof(T) != sizeof(boost::intmax_t))
#endif
{
BOOST_CHECK_THROW(lexical_cast<T>(s + zero), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(s + nine), bad_lexical_cast);
s = to_str<CharT>(max_val);
for (int i =1; i <=10; ++i) {
s[s.size()-1] += 1;
BOOST_CHECK_THROW(lexical_cast<T>( s ), bad_lexical_cast);
}
s = to_str<CharT>(max_val);
std::locale loc;
typedef std::numpunct<char> numpunct;
if ( BOOST_USE_FACET(numpunct, loc).grouping().empty() ) {
// Following tests work well for locale C
BOOST_CHECK_EQUAL(lexical_cast<T>(to_str<CharT>(0)+s), max_val);
BOOST_CHECK_EQUAL(lexical_cast<T>(to_str<CharT>(0)+to_str<CharT>(0)+s), max_val);
BOOST_CHECK_EQUAL(lexical_cast<T>(to_str<CharT>(0)+to_str<CharT>(0)+to_str<CharT>(0)+s), max_val);
}
for (int i =1; i <=256; ++i) {
BOOST_CHECK_THROW(lexical_cast<T>( to_str<CharT>(i)+s ), bad_lexical_cast);
}
typedef BOOST_DEDUCED_TYPENAME boost::integral_promotion<T>::type promoted;
if ( !(boost::is_same<T, promoted>::value) )
{
promoted prom = max_val;
s = to_str<CharT>(max_val);
for (int i =1; i <=256; ++i) {
BOOST_CHECK_THROW(lexical_cast<T>( to_str<CharT>(prom+i) ), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( to_str<CharT>(i)+s ), bad_lexical_cast);
}
}
}
if(limits::digits <= 16 && lcast_test_small_integral_types_completely)
@@ -586,7 +692,7 @@ void test_conversion_from_string_to_integral(CharT)
// Test values around zero:
if(limits::is_signed)
for(t = -counter; t < static_cast<T>(counter); ++t)
for(t = static_cast<T>(-counter); t < static_cast<T>(counter); ++t)
BOOST_CHECK(lexical_cast<T>(to_str<CharT>(t)) == t);
// Test values around 100, 1000, 10000, ...
@@ -603,6 +709,21 @@ void test_conversion_from_string_to_integral(CharT)
template<class T>
void test_conversion_from_to_integral_for_locale()
{
std::locale current_locale;
typedef std::numpunct<char> numpunct;
numpunct const& np = BOOST_USE_FACET(numpunct, current_locale);
if ( !np.grouping().empty() )
{
BOOST_CHECK_THROW(
lexical_cast<T>( std::string("100") + np.thousands_sep() + np.thousands_sep() + "0" )
, bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( std::string("100") + np.thousands_sep() ), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( np.thousands_sep() + std::string("100") ), bad_lexical_cast);
// Exception must not be thrown, when we are using no separators at all
BOOST_CHECK( lexical_cast<T>("30000") == static_cast<T>(30000) );
}
test_conversion_from_integral_to_integral<T>();
test_conversion_from_integral_to_string<T>('0');
test_conversion_from_string_to_integral<T>('0');
@@ -625,13 +746,54 @@ void test_conversion_from_to_integral()
signed char const szero = '0';
unsigned char const uzero = '0';
test_conversion_from_integral_to_char<T>(zero);
test_conversion_from_char_to_integral<T>(zero);
test_conversion_from_integral_to_char<T>(szero);
test_conversion_from_char_to_integral<T>(szero);
test_conversion_from_integral_to_char<T>(uzero);
test_conversion_from_char_to_integral<T>(uzero);
#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
wchar_t const wzero = L'0';
test_conversion_from_integral_to_char<T>(wzero);
test_conversion_from_char_to_integral<T>(wzero);
#endif
#ifndef BOOST_NO_CHAR16_T
char16_t const u16zero = u'0';
test_conversion_from_integral_to_char<T>(u16zero);
test_conversion_from_char_to_integral<T>(u16zero);
#endif
#ifndef BOOST_NO_CHAR32_T
char32_t const u32zero = u'0';
test_conversion_from_integral_to_char<T>(u32zero);
test_conversion_from_char_to_integral<T>(u32zero);
#endif
BOOST_CHECK(lexical_cast<T>("-1") == static_cast<T>(-1));
BOOST_CHECK(lexical_cast<T>("-9") == static_cast<T>(-9));
BOOST_CHECK(lexical_cast<T>(-1) == static_cast<T>(-1));
BOOST_CHECK(lexical_cast<T>(-9) == static_cast<T>(-9));
BOOST_CHECK_THROW(lexical_cast<T>("-1.0"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("-9.0"), bad_lexical_cast);
BOOST_CHECK(lexical_cast<T>(-1.0) == static_cast<T>(-1));
BOOST_CHECK(lexical_cast<T>(-9.0) == static_cast<T>(-9));
BOOST_CHECK(lexical_cast<T>(static_cast<T>(1)) == static_cast<T>(1));
BOOST_CHECK(lexical_cast<T>(static_cast<T>(9)) == static_cast<T>(9));
BOOST_CHECK_THROW(lexical_cast<T>(1.1f), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(1.1), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(1.1L), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(1.0001f), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(1.0001), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>(1.0001L), bad_lexical_cast);
BOOST_CHECK(lexical_cast<T>("+1") == static_cast<T>(1) );
BOOST_CHECK(lexical_cast<T>("+9") == static_cast<T>(9) );
BOOST_CHECK(lexical_cast<T>("+10") == static_cast<T>(10) );
BOOST_CHECK(lexical_cast<T>("+90") == static_cast<T>(90) );
BOOST_CHECK_THROW(lexical_cast<T>("++1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("-+9"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("--1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("+-9"), bad_lexical_cast);
// test_conversion_from_to_integral_for_locale
typedef std::numpunct<char> numpunct;
@@ -717,7 +879,7 @@ void test_conversion_from_to_ulonglong()
test_conversion_from_to_integral<boost::ulong_long_type>();
}
#elif defined(LCAST_TEST_LONGLONG)
#elif defined(BOOST_HAS_MS_INT64)
void test_conversion_from_to_longlong()
{
@@ -788,3 +950,83 @@ void test_wallocator()
#endif
void test_char_types_conversions()
{
const char c_arr[] = "Test array of chars";
const unsigned char uc_arr[] = "Test array of chars";
const signed char sc_arr[] = "Test array of chars";
BOOST_CHECK(boost::lexical_cast<std::string>(c_arr) == std::string(c_arr));
BOOST_CHECK(boost::lexical_cast<std::string>(uc_arr) == std::string(c_arr));
BOOST_CHECK(boost::lexical_cast<std::string>(sc_arr) == std::string(c_arr));
BOOST_CHECK(boost::lexical_cast<char>(c_arr[0]) == c_arr[0]);
BOOST_CHECK(boost::lexical_cast<char>(uc_arr[0]) == c_arr[0]);
BOOST_CHECK(boost::lexical_cast<char>(sc_arr[0]) == c_arr[0]);
BOOST_CHECK(boost::lexical_cast<unsigned char>(c_arr[0]) == uc_arr[0]);
BOOST_CHECK(boost::lexical_cast<unsigned char>(uc_arr[0]) == uc_arr[0]);
BOOST_CHECK(boost::lexical_cast<unsigned char>(sc_arr[0]) == uc_arr[0]);
BOOST_CHECK(boost::lexical_cast<signed char>(c_arr[0]) == sc_arr[0]);
BOOST_CHECK(boost::lexical_cast<signed char>(uc_arr[0]) == sc_arr[0]);
BOOST_CHECK(boost::lexical_cast<signed char>(sc_arr[0]) == sc_arr[0]);
#ifndef BOOST_LCAST_NO_WCHAR_T
const wchar_t wc_arr[]=L"Test array of chars";
BOOST_CHECK(boost::lexical_cast<std::wstring>(wc_arr) == std::wstring(wc_arr));
BOOST_CHECK(boost::lexical_cast<wchar_t>(wc_arr[0]) == wc_arr[0]);
#endif
}
struct foo_operators_test
{
foo_operators_test() : f(2) {}
int f;
};
template <typename OStream>
OStream& operator<<(OStream& ostr, const foo_operators_test& foo)
{
ostr << foo.f;
return ostr;
}
template <typename IStream>
IStream& operator>>(IStream& istr, foo_operators_test& foo)
{
istr >> foo.f;
return istr;
}
void operators_overload_test()
{
foo_operators_test foo;
BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(foo), "2");
BOOST_CHECK_EQUAL((boost::lexical_cast<foo_operators_test>("2")).f, 2);
// Must compile
(void)boost::lexical_cast<foo_operators_test>(foo);
}
#ifndef BOOST_NO_CHAR16_T
void test_char16_conversions()
{
BOOST_CHECK(u"100" == lexical_cast<std::u16string>(u"100"));
BOOST_CHECK(u"1" == lexical_cast<std::u16string>(u'1'));
}
#endif
#ifndef BOOST_NO_CHAR32_T
void test_char32_conversions()
{
BOOST_CHECK(U"100" == lexical_cast<std::u32string>(U"100"));
BOOST_CHECK(U"1" == lexical_cast<std::u32string>(U'1'));
}
#endif

4
test/Jamfile.v2
View File

@@ -25,6 +25,10 @@ test-suite conversion
[ run lexical_cast_abstract_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
[ run lexical_cast_noncopyable_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
[ run lexical_cast_vc8_bug_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
[ run lexical_cast_wchars_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
[ run lexical_cast_float_types_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
[ run lexical_cast_inf_nan_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
[ run lexical_cast_containers_test.cpp ../../test/build//boost_unit_test_framework/<link>static ]
;

2
test/lexical_cast_abstract_test.cpp
View File

@@ -28,7 +28,7 @@ void test_abstract();
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test_framework::test_suite *suite =
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast unit test");
suite->add(BOOST_TEST_CASE(&test_abstract));

38
test/lexical_cast_containers_test.cpp Normal file
View File

@@ -0,0 +1,38 @@
// Testing boost::lexical_cast with boost::container::string.
//
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Antony Polukhin, 2011.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
#include <boost/lexical_cast.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/container/string.hpp>
void testing_boost_containers_basic_string();
using namespace boost;
boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test::test_suite *suite =
BOOST_TEST_SUITE("Testing boost::lexical_cast with boost::container::string");
suite->add(BOOST_TEST_CASE(testing_boost_containers_basic_string));
return suite;
}
void testing_boost_containers_basic_string()
{
BOOST_CHECK("100" == lexical_cast<boost::container::string>("100"));
BOOST_CHECK(L"100" == lexical_cast<boost::container::wstring>(L"100"));
BOOST_CHECK("100" == lexical_cast<boost::container::string>(100));
boost::container::string str("1000");
BOOST_CHECK(1000 == lexical_cast<int>(str));
}

513
test/lexical_cast_float_types_test.cpp Executable file
View File

@@ -0,0 +1,513 @@
// Unit test for boost::lexical_cast.
//
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Antony Polukhin, 2011.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
#include <boost/config.hpp>
#if defined(__INTEL_COMPILER)
#pragma warning(disable: 193 383 488 981 1418 1419)
#elif defined(BOOST_MSVC)
#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
#endif
#include <boost/lexical_cast.hpp>
#include <boost/cstdint.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/test/floating_point_comparison.hpp>
void test_conversion_from_to_float();
void test_conversion_from_to_double();
void test_conversion_from_to_long_double();
using namespace boost;
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast float types unit test");
suite->add(BOOST_TEST_CASE(&test_conversion_from_to_float));
suite->add(BOOST_TEST_CASE(&test_conversion_from_to_double));
suite->add(BOOST_TEST_CASE(&test_conversion_from_to_long_double));
return suite;
}
// Replace "-,999" with "-999".
template<class CharT>
std::basic_string<CharT> to_str_gcc_workaround(std::basic_string<CharT> str)
{
std::locale loc;
std::numpunct<CharT> const& np = BOOST_USE_FACET(std::numpunct<CharT>, loc);
std::ctype<CharT> const& ct = BOOST_USE_FACET(std::ctype<CharT>, loc);
if(np.grouping().empty())
return str;
CharT prefix[3] = { ct.widen('-'), np.thousands_sep(), CharT() };
if(str.find(prefix) != 0)
return str;
prefix[1] = CharT();
str.replace(0, 2, prefix);
return str;
}
template<class CharT, class T>
std::basic_string<CharT> to_str(T t)
{
std::basic_ostringstream<CharT> o;
o << t;
return to_str_gcc_workaround(o.str());
}
template<class T>
void test_conversion_from_to_float_for_locale()
{
std::locale current_locale;
typedef std::numpunct<char> numpunct;
numpunct const& np = BOOST_USE_FACET(numpunct, current_locale);
if ( !np.grouping().empty() )
{
BOOST_CHECK_THROW(
lexical_cast<T>( std::string("100") + np.thousands_sep() + np.thousands_sep() + "0" )
, bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( std::string("100") + np.thousands_sep() ), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( np.thousands_sep() + std::string("100") ), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( std::string("1") + np.thousands_sep() + np.decimal_point() + "e10" ), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( std::string("1e10") + np.thousands_sep() ), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( std::string("1") + np.thousands_sep() + "e10" ), bad_lexical_cast);
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(100000) ), 100000, (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(10000000u) ), 10000000u, (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(100) ), 100, (std::numeric_limits<T>::epsilon()) );
#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(100000) ), 100000, (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(10000000u) ), 10000000u, (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(100) ), 100, (std::numeric_limits<T>::epsilon()) );
#endif
// Exception must not be thrown, when we are using no separators at all
BOOST_CHECK_CLOSE_FRACTION( lexical_cast<T>("30000"), static_cast<T>(30000), (std::numeric_limits<T>::epsilon()) );
}
}
/*
* Converts char* [and wchar_t] to float number type and checks, that generated
* number is in interval [base_value-epsilon, base_value+epsilon].
*/
#ifndef BOOST_LCAST_NO_WCHAR_T
#define CHECK_CLOSE_ABS_DIFF(VAL,PREFIX) \
converted_val = lexical_cast<test_t>(#VAL); \
BOOST_CHECK_CLOSE_FRACTION( (VAL ## L? VAL ## L : std::numeric_limits<test_t>::epsilon()), \
(converted_val ? converted_val : std::numeric_limits<test_t>::epsilon()), \
std::numeric_limits<test_t>::epsilon() \
); \
BOOST_CHECK_EQUAL(converted_val, lexical_cast<test_t>(L## #VAL) );
#else
#define CHECK_CLOSE_ABS_DIFF(VAL,TYPE) \
converted_val = lexical_cast<test_t>(#VAL); \
BOOST_CHECK_CLOSE_FRACTION( (VAL ## L? VAL ## L : std::numeric_limits<test_t>::epsilon()), \
(converted_val ? converted_val : std::numeric_limits<test_t>::epsilon()), \
std::numeric_limits<test_t>::epsilon() \
);
#endif
template <class TestType>
void test_converion_to_float_types()
{
typedef TestType test_t;
test_t converted_val;
BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<test_t>('1'), (std::numeric_limits<test_t>::epsilon()));
BOOST_CHECK_EQUAL(0.0, lexical_cast<test_t>('0'));
unsigned char const uc_one = '1';
unsigned char const uc_zero ='0';
BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<test_t>(uc_one), (std::numeric_limits<test_t>::epsilon()));
BOOST_CHECK_EQUAL(0.0, lexical_cast<test_t>(uc_zero));
signed char const sc_one = '1';
signed char const sc_zero ='0';
BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<test_t>(sc_one), (std::numeric_limits<test_t>::epsilon()));
BOOST_CHECK_EQUAL(0.0, lexical_cast<test_t>(sc_zero));
BOOST_CHECK_CLOSE_FRACTION(1e34L, lexical_cast<test_t>( "10000000000000000000000000000000000"), (std::numeric_limits<test_t>::epsilon()) );
// VC failes the next test
// BOOST_CHECK_CLOSE_FRACTION(1e-35L, lexical_cast<test_t>("0.00000000000000000000000000000000001"), (std::numeric_limits<test_t>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(
0.1111111111111111111111111111111111111111111111111111111111111111111111111L
, lexical_cast<test_t>("0.1111111111111111111111111111111111111111111111111111111111111111111111111")
, (std::numeric_limits<test_t>::epsilon()) );
CHECK_CLOSE_ABS_DIFF(1,test_t);
BOOST_CHECK_EQUAL(0,lexical_cast<test_t>("0"));
CHECK_CLOSE_ABS_DIFF(-1,test_t);
CHECK_CLOSE_ABS_DIFF(1.0, test_t);
CHECK_CLOSE_ABS_DIFF(0.0, test_t);
CHECK_CLOSE_ABS_DIFF(-1.0,test_t);
CHECK_CLOSE_ABS_DIFF(1e1, test_t);
CHECK_CLOSE_ABS_DIFF(0e1, test_t);
CHECK_CLOSE_ABS_DIFF(-1e1,test_t);
CHECK_CLOSE_ABS_DIFF(1.0e1, test_t);
CHECK_CLOSE_ABS_DIFF(0.0e1, test_t);
CHECK_CLOSE_ABS_DIFF(-1.0e1,test_t);
CHECK_CLOSE_ABS_DIFF(1e-1, test_t);
CHECK_CLOSE_ABS_DIFF(0e-1, test_t);
CHECK_CLOSE_ABS_DIFF(-1e-1,test_t);
CHECK_CLOSE_ABS_DIFF(1.0e-1, test_t);
CHECK_CLOSE_ABS_DIFF(0.0e-1, test_t);
CHECK_CLOSE_ABS_DIFF(-1.0e-1,test_t);
CHECK_CLOSE_ABS_DIFF(1E1, test_t);
CHECK_CLOSE_ABS_DIFF(0E1, test_t);
CHECK_CLOSE_ABS_DIFF(-1E1,test_t);
CHECK_CLOSE_ABS_DIFF(1.0E1, test_t);
CHECK_CLOSE_ABS_DIFF(0.0E1, test_t);
CHECK_CLOSE_ABS_DIFF(-1.0E1,test_t);
CHECK_CLOSE_ABS_DIFF(1E-1, test_t);
CHECK_CLOSE_ABS_DIFF(0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(-1E-1,test_t);
CHECK_CLOSE_ABS_DIFF(1.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(0.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(-1.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(-.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(10.0, test_t);
CHECK_CLOSE_ABS_DIFF(00.0, test_t);
CHECK_CLOSE_ABS_DIFF(-10.0,test_t);
CHECK_CLOSE_ABS_DIFF(10e1, test_t);
CHECK_CLOSE_ABS_DIFF(00e1, test_t);
CHECK_CLOSE_ABS_DIFF(-10e1,test_t);
CHECK_CLOSE_ABS_DIFF(10.0e1, test_t);
CHECK_CLOSE_ABS_DIFF(00.0e1, test_t);
CHECK_CLOSE_ABS_DIFF(-10.0e1,test_t);
CHECK_CLOSE_ABS_DIFF(10e-1, test_t);
CHECK_CLOSE_ABS_DIFF(00e-1, test_t);
CHECK_CLOSE_ABS_DIFF(-10e-1,test_t);
CHECK_CLOSE_ABS_DIFF(10.0e-1, test_t);
CHECK_CLOSE_ABS_DIFF(00.0e-1, test_t);
CHECK_CLOSE_ABS_DIFF(-10.0e-1,test_t);
CHECK_CLOSE_ABS_DIFF(10E1, test_t);
CHECK_CLOSE_ABS_DIFF(00E1, test_t);
CHECK_CLOSE_ABS_DIFF(-10E1,test_t);
CHECK_CLOSE_ABS_DIFF(10.0E1, test_t);
CHECK_CLOSE_ABS_DIFF(00.0E1, test_t);
CHECK_CLOSE_ABS_DIFF(-10.0E1,test_t);
CHECK_CLOSE_ABS_DIFF(10E-1, test_t);
CHECK_CLOSE_ABS_DIFF(00E-1, test_t);
CHECK_CLOSE_ABS_DIFF(-10E-1,test_t);
CHECK_CLOSE_ABS_DIFF(10.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(00.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(-10.0E-1, test_t);
CHECK_CLOSE_ABS_DIFF(-10101.0E-011, test_t);
CHECK_CLOSE_ABS_DIFF(-10101093, test_t);
CHECK_CLOSE_ABS_DIFF(10101093, test_t);
CHECK_CLOSE_ABS_DIFF(-.34, test_t);
CHECK_CLOSE_ABS_DIFF(.34, test_t);
CHECK_CLOSE_ABS_DIFF(.34e10, test_t);
BOOST_CHECK_THROW(lexical_cast<test_t>("-1.e"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("-1.E"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.e"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.E"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0E"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("10E"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("10e"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0E-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("10E-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("10e-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("e1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("e-1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("e-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>(".e"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111ee"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111e-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("-B"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("0xB"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("0x0"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("--1.0"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e--1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0.0"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1e1e1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e-1e-1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>(" 1.0"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("1.0 "), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>(""), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("-"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>('\0'), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>('-'), bad_lexical_cast);
}
template <class T>
void test_float_typess_for_overflows()
{
typedef T test_t;
test_t minvalue = (std::numeric_limits<test_t>::min)();
std::string s_min_value = lexical_cast<std::string>(minvalue);
BOOST_CHECK_CLOSE_FRACTION(minvalue, lexical_cast<test_t>(minvalue), (std::numeric_limits<test_t>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(minvalue, lexical_cast<test_t>(s_min_value), (std::numeric_limits<test_t>::epsilon()));
test_t maxvalue = (std::numeric_limits<test_t>::max)();
std::string s_max_value = lexical_cast<std::string>(maxvalue);
BOOST_CHECK_CLOSE_FRACTION(maxvalue, lexical_cast<test_t>(maxvalue), (std::numeric_limits<test_t>::epsilon()));
BOOST_CHECK_CLOSE_FRACTION(maxvalue, lexical_cast<test_t>(s_max_value), (std::numeric_limits<test_t>::epsilon()));
BOOST_CHECK_THROW(lexical_cast<test_t>(s_max_value+"1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>(s_max_value+"9"), bad_lexical_cast);
// VC9 can fail the fllowing tests on floats and doubles when using stingstream...
BOOST_CHECK_THROW(lexical_cast<test_t>("1"+s_max_value), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<test_t>("9"+s_max_value), bad_lexical_cast);
if ( is_same<test_t,float>::value )
{
BOOST_CHECK_THROW(lexical_cast<test_t>( (std::numeric_limits<double>::max)() ), bad_lexical_cast);
BOOST_CHECK(
(std::numeric_limits<double>::min)() - std::numeric_limits<test_t>::epsilon()
<= lexical_cast<test_t>( (std::numeric_limits<double>::min)() )
&& lexical_cast<test_t>( (std::numeric_limits<double>::min)() )
<= (std::numeric_limits<double>::min)() + std::numeric_limits<test_t>::epsilon()
);
}
if ( sizeof(test_t) < sizeof(long double) )
{
BOOST_CHECK_THROW(lexical_cast<test_t>( (std::numeric_limits<long double>::max)() ), bad_lexical_cast);
BOOST_CHECK(
(std::numeric_limits<long double>::min)() - std::numeric_limits<test_t>::epsilon()
<= lexical_cast<test_t>( (std::numeric_limits<long double>::min)() )
&& lexical_cast<test_t>( (std::numeric_limits<long double>::min)() )
<= (std::numeric_limits<long double>::min)() + std::numeric_limits<test_t>::epsilon()
);
}
}
#undef CHECK_CLOSE_ABS_DIFF
#define TEST_TO_FROM_CAST_AROUND_TYPED(VAL,STRING_TYPE) \
test_value = VAL + std::numeric_limits<test_t>::epsilon() * i ; \
converted_val = lexical_cast<test_t>( lexical_cast<STRING_TYPE>(test_value) ); \
BOOST_CHECK_CLOSE_FRACTION( \
test_value, \
converted_val, \
std::numeric_limits<test_t>::epsilon() \
);
/*
* For interval [ from_mult*epsilon+VAL, to_mult*epsilon+VAL ], converts float type
* numbers to string[wstring] and then back to float type, then compares initial
* values and generated.
* Step is epsilon
*/
#ifndef BOOST_LCAST_NO_WCHAR_T
# define TEST_TO_FROM_CAST_AROUND(VAL) \
for(i=from_mult; i<=to_mult; ++i) { \
TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::string) \
TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::wstring) \
}
#else
# define TEST_TO_FROM_CAST_AROUND(VAL) \
for(i=from_mult; i<=to_mult; ++i) { \
TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::string) \
}
#endif
template <class TestType>
void test_converion_from_to_float_types()
{
typedef TestType test_t;
test_t test_value;
test_t converted_val;
int i;
int from_mult = -50;
int to_mult = 50;
TEST_TO_FROM_CAST_AROUND( 0.0 );
long double val1;
for(val1 = 1.0e-10L; val1 < 1e11; val1*=10 )
TEST_TO_FROM_CAST_AROUND( val1 );
long double val2;
for(val2 = -1.0e-10L; val2 > -1e11; val2*=10 )
TEST_TO_FROM_CAST_AROUND( val2 );
from_mult = -100;
to_mult = 0;
TEST_TO_FROM_CAST_AROUND( (std::numeric_limits<test_t>::max)() );
from_mult = 0;
to_mult = 100;
TEST_TO_FROM_CAST_AROUND( (std::numeric_limits<test_t>::min)() );
}
#undef TEST_TO_FROM_CAST_AROUND
#undef TEST_TO_FROM_CAST_AROUND_TYPED
template<class T, class CharT>
void test_conversion_from_float_to_char(CharT zero)
{
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(0)) == zero + 0);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(1)) == zero + 1);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(2)) == zero + 2);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(3)) == zero + 3);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(4)) == zero + 4);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(5)) == zero + 5);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(6)) == zero + 6);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(7)) == zero + 7);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(8)) == zero + 8);
BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(9)) == zero + 9);
BOOST_CHECK_THROW(lexical_cast<CharT>(static_cast<T>(10)), bad_lexical_cast);
T t = (std::numeric_limits<T>::max)();
BOOST_CHECK_THROW(lexical_cast<CharT>(t), bad_lexical_cast);
}
template<class T, class CharT>
void test_conversion_from_char_to_float(CharT zero)
{
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 0)), static_cast<T>(0), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 1)), static_cast<T>(1), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 2)), static_cast<T>(2), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 3)), static_cast<T>(3), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 4)), static_cast<T>(4), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 5)), static_cast<T>(5), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 6)), static_cast<T>(6), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 7)), static_cast<T>(7), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 8)), static_cast<T>(8), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 9)), static_cast<T>(9), (std::numeric_limits<T>::epsilon()) );
BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero + 10)), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero - 1)), bad_lexical_cast);
}
struct restore_oldloc
{
std::locale oldloc;
~restore_oldloc() { std::locale::global(oldloc); }
};
template<class T>
void test_conversion_from_to_float()
{ char const zero = '0';
signed char const szero = '0';
unsigned char const uzero = '0';
test_conversion_from_float_to_char<T>(zero);
test_conversion_from_char_to_float<T>(zero);
test_conversion_from_float_to_char<T>(szero);
test_conversion_from_char_to_float<T>(szero);
test_conversion_from_float_to_char<T>(uzero);
test_conversion_from_char_to_float<T>(uzero);
#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
wchar_t const wzero = L'0';
test_conversion_from_float_to_char<T>(wzero);
test_conversion_from_char_to_float<T>(wzero);
#endif
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>("+1"), 1, std::numeric_limits<T>::epsilon());
BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>("+9"), 9, std::numeric_limits<T>::epsilon());
BOOST_CHECK_THROW(lexical_cast<T>("++1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("-+9"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("--1"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<T>("+-9"), bad_lexical_cast);
test_converion_to_float_types<T>();
test_float_typess_for_overflows<T>();
test_converion_from_to_float_types<T>();
typedef std::numpunct<char> numpunct;
restore_oldloc guard;
std::locale const& oldloc = guard.oldloc;
std::string grouping1 = BOOST_USE_FACET(numpunct, oldloc).grouping();
std::string grouping2(grouping1);
test_conversion_from_to_float_for_locale<T>();
try
{
std::locale newloc("");
std::locale::global(newloc);
grouping2 = BOOST_USE_FACET(numpunct, newloc).grouping();
}
catch(std::exception const& ex)
{
std::string msg("Failed to set system locale: ");
msg += ex.what();
BOOST_TEST_MESSAGE(msg);
}
if(grouping1 != grouping2)
test_conversion_from_to_float_for_locale<T>();
if(grouping1.empty() && grouping2.empty())
BOOST_TEST_MESSAGE("Formatting with thousands_sep has not been tested");
}
void test_conversion_from_to_float()
{
test_conversion_from_to_float<float>();
}
void test_conversion_from_to_double()
{
test_conversion_from_to_float<double>();
}
void test_conversion_from_to_long_double()
{
test_conversion_from_to_float<long double>();
}

180
test/lexical_cast_inf_nan_test.cpp Executable file
View File

@@ -0,0 +1,180 @@
// Unit test for boost::lexical_cast.
//
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Antony Polukhin, 2011.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
#include <boost/config.hpp>
#if defined(__INTEL_COMPILER)
#pragma warning(disable: 193 383 488 981 1418 1419)
#elif defined(BOOST_MSVC)
#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
#endif
#include <boost/lexical_cast.hpp>
#include <boost/math/special_functions/sign.hpp>
#include <boost/math/special_functions/fpclassify.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/test/floating_point_comparison.hpp>
#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif
using namespace boost;
template <class T>
bool is_pos_inf(T value)
{
return (boost::math::isinf)(value) && !(boost::math::signbit)(value);
}
template <class T>
bool is_neg_inf(T value)
{
return (boost::math::isinf)(value) && (boost::math::signbit)(value);
}
template <class T>
bool is_pos_nan(T value)
{
return (boost::math::isnan)(value) && !(boost::math::signbit)(value);
}
template <class T>
bool is_neg_nan(T value)
{
/* There is some strange behaviour on Itanium platform with -nan nuber for long double.
* It is a IA64 feature, or it is a boost::math feature, not a lexical_cast bug */
#if defined(__ia64__) || defined(_M_IA64)
return (boost::math::isnan)(value)
&& ( boost::is_same<T, long double >::value || (boost::math::signbit)(value) );
#else
return (boost::math::isnan)(value) && (boost::math::signbit)(value);
#endif
}
template <class T>
void test_inf_nan_templated()
{
typedef T test_t;
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("inf") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("INF") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-inf") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-INF") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+inf") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+INF") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("infinity") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("INFINITY") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-infinity") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-INFINITY") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+infinity") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+INFINITY") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("nan") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("NAN") ) );
BOOST_CHECK( is_neg_nan( lexical_cast<test_t>("-nan") ) );
BOOST_CHECK( is_neg_nan( lexical_cast<test_t>("-NAN") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("+nan") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("+NAN") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("nan()") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("NAN(some string)") ) );
BOOST_CHECK_THROW( lexical_cast<test_t>("NAN(some string"), bad_lexical_cast );
BOOST_CHECK(lexical_cast<std::string>( (boost::math::changesign)(std::numeric_limits<test_t >::infinity()))
== "-inf" );
BOOST_CHECK(lexical_cast<std::string>( std::numeric_limits<test_t >::infinity()) == "inf" );
BOOST_CHECK(lexical_cast<std::string>( std::numeric_limits<test_t >::quiet_NaN()) == "nan" );
#if !defined(__ia64__) && !defined(_M_IA64)
BOOST_CHECK(lexical_cast<std::string>(
(boost::math::changesign)(std::numeric_limits<test_t >::quiet_NaN()))
== "-nan" );
#endif
#ifndef BOOST_LCAST_NO_WCHAR_T
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"inf") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"INF") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-inf") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-INF") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+inf") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+INF") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"infinity") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"INFINITY") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-infinity") ) );
BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-INFINITY") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+infinity") ) );
BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+INFINITY") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"nan") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"NAN") ) );
BOOST_CHECK( is_neg_nan( lexical_cast<test_t>(L"-nan") ) );
BOOST_CHECK( is_neg_nan( lexical_cast<test_t>(L"-NAN") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"+nan") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"+NAN") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"nan()") ) );
BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"NAN(some string)") ) );
BOOST_CHECK_THROW( lexical_cast<test_t>(L"NAN(some string"), bad_lexical_cast );
BOOST_CHECK(lexical_cast<std::wstring>( (boost::math::changesign)(std::numeric_limits<test_t >::infinity()))
== L"-inf" );
BOOST_CHECK(lexical_cast<std::wstring>( std::numeric_limits<test_t >::infinity()) == L"inf" );
BOOST_CHECK(lexical_cast<std::wstring>( std::numeric_limits<test_t >::quiet_NaN()) == L"nan" );
#if !defined(__ia64__) && !defined(_M_IA64)
BOOST_CHECK(lexical_cast<std::wstring>(
(boost::math::changesign)(std::numeric_limits<test_t >::quiet_NaN()))
== L"-nan" );
#endif
#endif
}
void test_inf_nan_float()
{
test_inf_nan_templated<float >();
}
void test_inf_nan_double()
{
test_inf_nan_templated<double >();
}
void test_inf_nan_long_double()
{
test_inf_nan_templated<long double >();
}
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast inf anf nan parsing unit test");
suite->add(BOOST_TEST_CASE(&test_inf_nan_float));
suite->add(BOOST_TEST_CASE(&test_inf_nan_double));
suite->add(BOOST_TEST_CASE(&test_inf_nan_long_double));
return suite;
}

8
test/lexical_cast_loopback_test.cpp
View File

@@ -30,7 +30,7 @@ void test_round_conversion_long_double();
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test_framework::test_suite *suite =
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast unit test");
suite->add(BOOST_TEST_CASE(&test_round_conversion_float));
suite->add(BOOST_TEST_CASE(&test_round_conversion_double));
@@ -64,7 +64,6 @@ void test_round_conversion()
}
#if defined(BOOST_MSVC)
// See bug http://tinyurl.com/vhpvo
template<class T>
void test_msvc_magic_values()
@@ -73,7 +72,6 @@ void test_msvc_magic_values()
std::string magic_msvc_s = boost::lexical_cast<std::string>(magic_msvc);
BOOST_CHECK(magic_msvc == lexical_cast<T>(magic_msvc_s));
}
#endif
void test_round_conversion_float()
{
@@ -83,16 +81,12 @@ void test_round_conversion_float()
void test_round_conversion_double()
{
test_round_conversion<double>();
#if defined(BOOST_MSVC)
test_msvc_magic_values<double>();
#endif
}
void test_round_conversion_long_double()
{
test_round_conversion<long double>();
#if defined(BOOST_MSVC)
test_msvc_magic_values<long double>();
#endif
}

2
test/lexical_cast_noncopyable_test.cpp
View File

@@ -28,7 +28,7 @@ void test_noncopyable();
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test_framework::test_suite *suite =
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast unit test");
suite->add(BOOST_TEST_CASE(&test_noncopyable));

16
test/lexical_cast_vc8_bug_test.cpp
View File

@@ -1,3 +1,17 @@
// Unit test for boost::lexical_cast.
//
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Alexander Nasonov, 2007.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
//
// This tests now must pass on vc8, because lexical_cast
// implementation has changed and it does not use stringstream for casts
// to integral types
#include <boost/config.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/cstdint.hpp>
@@ -46,7 +60,7 @@ void test_vc8_bug()
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test_framework::test_suite *suite =
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast vc8 bug unit test");
suite->add(BOOST_TEST_CASE(test_vc8_bug));
return suite;

56
test/lexical_cast_wchars_test.cpp Executable file
View File

@@ -0,0 +1,56 @@
// Unit test for boost::lexical_cast.
//
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Antony Polukhin, 2011.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
#include <boost/config.hpp>
#if defined(__INTEL_COMPILER)
#pragma warning(disable: 193 383 488 981 1418 1419)
#elif defined(BOOST_MSVC)
#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
#endif
#include <boost/lexical_cast.hpp>
#include <boost/cstdint.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/test/floating_point_comparison.hpp>
using namespace boost;
void test_char_types_conversions()
{
#ifndef BOOST_LCAST_NO_WCHAR_T
const char c_arr[] = "Test array of chars";
const unsigned char uc_arr[] = "Test array of chars";
const signed char sc_arr[] = "Test array of chars";
const wchar_t wc_arr[] =L"Test array of chars";
// Following tests depend on realization of std::locale
// and pass for popular compilers and STL realizations
BOOST_CHECK(boost::lexical_cast<wchar_t>(c_arr[0]) == wc_arr[0]);
BOOST_CHECK(boost::lexical_cast<std::wstring>(c_arr) == std::wstring(wc_arr));
BOOST_CHECK(boost::lexical_cast<std::wstring>(sc_arr) == std::wstring(wc_arr) );
BOOST_CHECK(boost::lexical_cast<std::wstring>(uc_arr) == std::wstring(wc_arr) );
BOOST_CHECK_EQUAL(boost::lexical_cast<wchar_t>(uc_arr[0]), wc_arr[0]);
BOOST_CHECK_EQUAL(boost::lexical_cast<wchar_t>(sc_arr[0]), wc_arr[0]);
#endif
BOOST_CHECK(1);
}
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
unit_test::test_suite *suite =
BOOST_TEST_SUITE("lexical_cast char<->wchar_t unit test");
suite->add(BOOST_TEST_CASE(&test_char_types_conversions));
return suite;
}