- use result_of<>

- don't do that crazy argument deduction stuff--keep it simple!
- only include the nullary operator() when there is a result_type in T
- generate for any number of arguments


[SVN r1038]
This commit is contained in:
Douglas Gregor
2003-02-23 00:26:46 +00:00
parent 95d04d0f5a
commit c46809bbdf
2 changed files with 100 additions and 932 deletions

View File

@@ -29,423 +29,99 @@ void check_generate_zero(F f)
assert(f() == 0);
}
class negate_with_arg_type
{
public:
typedef int result_type;
typedef int argument_type;
negate_with_arg_type() {}
int operator()(int x) const { return -x; }
private:
negate_with_arg_type(const negate_with_arg_type&);
};
class negate_with_arg1_type
{
public:
typedef int result_type;
typedef int arg1_type;
negate_with_arg1_type() {}
int operator()(int x) const { return -x; }
private:
negate_with_arg1_type(const negate_with_arg1_type&);
};
class negate_with_no_arg
class negate_with_result_type
{
public:
typedef int result_type;
negate_with_no_arg() {}
negate_with_result_type() {}
int operator()(int x) const { return -x; }
private:
negate_with_no_arg(const negate_with_no_arg&);
negate_with_result_type(const negate_with_result_type&);
};
class negate_with_arg_type_sig
class negate_with_result_of
{
public:
template<typename T>
struct sig
struct result_of
{
typedef int type;
};
typedef int argument_type;
negate_with_arg_type_sig() {}
negate_with_result_of() {}
int operator()(int x) const { return -x; }
private:
negate_with_arg_type_sig(const negate_with_arg_type_sig&);
};
class negate_with_arg1_type_sig
{
public:
template<typename T>
struct sig
{
typedef int type;
};
typedef int arg1_type;
negate_with_arg1_type_sig() {}
int operator()(int x) const { return -x; }
private:
negate_with_arg1_type_sig(const negate_with_arg1_type_sig&);
};
class negate_with_no_arg_sig
{
public:
template<typename T>
struct sig
{
typedef int type;
};
negate_with_no_arg_sig() {}
int operator()(int x) const { return -x; }
private:
negate_with_no_arg_sig(const negate_with_no_arg_sig&);
};
class negate_with_arg_type_nrt
{
public:
typedef int argument_type;
negate_with_arg_type_nrt() {}
int operator()(int x) const { return -x; }
private:
negate_with_arg_type_nrt(const negate_with_arg_type_nrt&);
};
class negate_with_arg1_type_nrt
{
public:
typedef int arg1_type;
negate_with_arg1_type_nrt() {}
int operator()(int x) const { return -x; }
private:
negate_with_arg1_type_nrt(const negate_with_arg1_type_nrt&);
};
class negate_with_no_arg_nrt
{
public:
negate_with_no_arg_nrt() {}
int operator()(int x) const { return -x; }
private:
negate_with_no_arg_nrt(const negate_with_no_arg_nrt&);
negate_with_result_of(const negate_with_result_of&);
};
template<typename F>
void check_negate(F f)
{
assert(f(5) == -5);
}
template<typename F>
void check_negate_deduced(F f)
{
int x = 5;
assert(f(x) == -x);
}
class add_with_fs_arg_types
{
public:
typedef int result_type;
typedef int first_argument_type;
typedef int second_argument_type;
add_with_fs_arg_types() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_fs_arg_types(const add_with_fs_arg_types&);
};
class add_with_argN_types
{
public:
typedef int result_type;
typedef int arg1_type;
typedef int arg2_type;
add_with_argN_types() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_argN_types(const add_with_argN_types&);
};
class add_with_no_args
class add_with_result_type
{
public:
typedef int result_type;
add_with_no_args() {}
add_with_result_type() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_no_args(const add_with_no_args&);
add_with_result_type(const add_with_result_type&);
};
class add_with_fs_arg_types_sig
class add_with_result_of
{
public:
template<typename T1, typename T2> struct sig { typedef int type; };
typedef int first_argument_type;
typedef int second_argument_type;
template<typename F> struct result_of { typedef int type; };
add_with_fs_arg_types_sig() {}
add_with_result_of() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_fs_arg_types_sig(const add_with_fs_arg_types_sig&);
};
class add_with_argN_types_sig
{
public:
template<typename T1, typename T2> struct sig { typedef int type; };
typedef int arg1_type;
typedef int arg2_type;
add_with_argN_types_sig() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_argN_types_sig(const add_with_argN_types_sig&);
};
class add_with_no_args_sig
{
public:
template<typename T1, typename T2> struct sig { typedef int type; };
add_with_no_args_sig() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_no_args_sig(const add_with_no_args_sig&);
};
class add_with_fs_arg_types_nrt
{
public:
typedef int first_argument_type;
typedef int second_argument_type;
add_with_fs_arg_types_nrt() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_fs_arg_types_nrt(const add_with_fs_arg_types_nrt&);
};
class add_with_argN_types_nrt
{
public:
typedef int arg1_type;
typedef int arg2_type;
add_with_argN_types_nrt() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_argN_types_nrt(const add_with_argN_types_nrt&);
};
class add_with_no_args_nrt
{
public:
add_with_no_args_nrt() {}
int operator()(int x, int y) const { return x + y; }
private:
add_with_no_args_nrt(const add_with_no_args&);
add_with_result_of(const add_with_result_of&);
};
template<typename F>
void check_sum(F f)
{
assert(f(3, 5) == 8);
}
template<typename F>
void check_sum_deduced(F f)
{
int x = 3;
int y = 5;
assert(f(x, y) == x+y);
}
struct zero_negate_add_fs_arg_types
{
public:
typedef int result_type;
typedef int argument_type;
typedef int first_argument_type;
typedef int second_argument_type;
zero_negate_add_fs_arg_types() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_fs_arg_types(const zero_negate_add_fs_arg_types&);
};
struct zero_negate_add_argN_types
{
public:
typedef int result_type;
typedef int arg1_type;
typedef int arg2_type;
zero_negate_add_argN_types() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_argN_types(const zero_negate_add_argN_types&);
};
struct zero_negate_add_no_arg
struct zero_negate_add_result_type
{
public:
typedef int result_type;
zero_negate_add_no_arg() {}
zero_negate_add_result_type() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_no_arg(const zero_negate_add_no_arg&);
zero_negate_add_result_type(const zero_negate_add_result_type&);
};
struct zero_negate_add_fs_arg_types_sig
struct zero_negate_add_result_of
{
public:
template<typename T1 = void, typename T2 = void>
struct sig
{
typedef int type;
};
template<typename F> struct result_of { typedef int type; };
typedef int argument_type;
typedef int first_argument_type;
typedef int second_argument_type;
zero_negate_add_fs_arg_types_sig() {}
zero_negate_add_result_of() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_fs_arg_types_sig(const zero_negate_add_fs_arg_types_sig&);
};
struct zero_negate_add_argN_types_sig
{
public:
template<typename T1 = void, typename T2 = void>
struct sig
{
typedef int type;
};
typedef int arg1_type;
typedef int arg2_type;
zero_negate_add_argN_types_sig() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_argN_types_sig(const zero_negate_add_argN_types_sig&);
};
struct zero_negate_add_no_arg_sig
{
public:
template<typename T1 = void, typename T2 = void>
struct sig
{
typedef int type;
};
zero_negate_add_no_arg_sig() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_no_arg_sig(const zero_negate_add_no_arg_sig&);
};
struct zero_negate_add_fs_arg_types_nrt
{
public:
typedef int argument_type;
typedef int first_argument_type;
typedef int second_argument_type;
zero_negate_add_fs_arg_types_nrt() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_fs_arg_types_nrt(const zero_negate_add_fs_arg_types_nrt&);
};
struct zero_negate_add_argN_types_nrt
{
public:
typedef int arg1_type;
typedef int arg2_type;
zero_negate_add_argN_types_nrt() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_argN_types_nrt(const zero_negate_add_argN_types_nrt&);
};
struct zero_negate_add_no_arg_nrt
{
public:
zero_negate_add_no_arg_nrt() {}
int operator()() const { return 0; }
int operator()(int x) const { return -x; }
int operator()(int x, int y) const { return x+y; }
private:
zero_negate_add_no_arg_nrt(const zero_negate_add_no_arg_nrt&);
zero_negate_add_result_of(const zero_negate_add_result_of&);
};
int main()
@@ -454,87 +130,29 @@ int main()
generate_zero gz;
generate_zero_no_result_type gznrt;
check_generate_zero(boost::ref(gz));
check_generate_zero(boost::ref<int>(gznrt));
boost::ref(gznrt);
// Arity 1 function objects
negate_with_arg_type na;
negate_with_arg1_type na1;
negate_with_no_arg nn;
negate_with_arg_type_sig nas;
negate_with_arg1_type_sig na1s;
negate_with_no_arg_sig nns;
negate_with_arg_type_nrt nanrt;
negate_with_arg1_type_nrt na1nrt;
negate_with_no_arg_nrt nnnrt;
check_negate(boost::ref(na));
check_negate(boost::ref(na1));
check_negate_deduced(boost::ref(nn));
check_negate(boost::ref(nas));
check_negate(boost::ref(na1s));
check_negate_deduced(boost::ref(nns));
check_negate(boost::ref<int>(nanrt));
check_negate(boost::ref<int>(na1nrt));
check_negate_deduced(boost::ref<int>(nnnrt));
negate_with_result_type nrt;
negate_with_result_of nro;
check_negate(boost::ref(nrt));
check_negate(boost::ref(nro));
// Arity 2 function objects
add_with_fs_arg_types aa;
add_with_fs_arg_types a2;
add_with_no_args an;
add_with_fs_arg_types_sig aas;
add_with_fs_arg_types_sig a2s;
add_with_no_args_sig ans;
add_with_fs_arg_types_nrt aanrt;
add_with_fs_arg_types_nrt a2nrt;
add_with_no_args_nrt annrt;
check_sum(boost::ref(aa));
check_sum(boost::ref(a2));
check_sum_deduced(boost::ref(an));
check_sum(boost::ref(aas));
check_sum(boost::ref(a2s));
check_sum_deduced(boost::ref(ans));
check_sum(boost::ref<int>(aanrt));
check_sum(boost::ref<int>(a2nrt));
check_sum_deduced(boost::ref<int>(annrt));
add_with_result_type art;
add_with_result_of aro;
check_sum(boost::ref(art));
check_sum(boost::ref(aro));
// Arity overloading in function objects
zero_negate_add_argN_types znaa;
zero_negate_add_fs_arg_types znafs;
zero_negate_add_no_arg znana;
check_generate_zero(boost::ref(znaa));
check_negate(boost::ref(znaa));
check_sum(boost::ref(znaa));
check_generate_zero(boost::ref(znafs));
check_negate(boost::ref(znafs));
check_sum(boost::ref(znafs));
check_generate_zero(boost::ref(znana));
check_negate_deduced(boost::ref(znana));
check_sum_deduced(boost::ref(znana));
zero_negate_add_argN_types_sig znaas;
zero_negate_add_fs_arg_types_sig znafss;
zero_negate_add_no_arg_sig znanas;
// check_generate_zero(boost::ref(znaas));
check_negate(boost::ref(znaas));
check_sum(boost::ref(znaas));
// check_generate_zero(boost::ref(znafss));
check_negate(boost::ref(znafss));
check_sum(boost::ref(znafss));
// check_generate_zero(boost::ref(znanas));
check_negate_deduced(boost::ref(znanas));
check_sum_deduced(boost::ref(znanas));
zero_negate_add_argN_types znaanrt;
zero_negate_add_fs_arg_types znafsnrt;
zero_negate_add_no_arg znananrt;
check_generate_zero(boost::ref<int>(znaanrt));
check_negate(boost::ref<int>(znaanrt));
check_sum(boost::ref(znaanrt));
check_generate_zero(boost::ref<int>(znafsnrt));
check_negate(boost::ref<int>(znafsnrt));
check_sum(boost::ref<int>(znafsnrt));
check_generate_zero(boost::ref<int>(znananrt));
check_negate_deduced(boost::ref<int>(znananrt));
check_sum_deduced(boost::ref<int>(znananrt));
zero_negate_add_result_type znart;
zero_negate_add_result_type znaro;
check_generate_zero(boost::ref(znart));
check_negate(boost::ref(znart));
check_sum(boost::ref(znart));
check_generate_zero(boost::ref(znaro));
check_negate(boost::ref(znaro));
check_sum(boost::ref(znaro));
return 0;
}