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C++: Fix expensive lookup for boost

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With this patch, CheckSymbols takes about 200ms for processing the boost/proto
hello world example [1]. Before, it needed about 11 seconds (timer in
CheckSymbols::run). Same goes for including <boost/fusion/include/zip.hpp>.

The custom ProcessedSet object was added to support "completion for typedefs
for templates in namespaces", but apparently that's not needed anymore, as the
added test proves.

[1] http://www.boost.org/doc/libs/1_58_0/doc/html/proto/users_guide.html#boost_proto.users_guide.getting_started.hello_world

Task-numer: QTCREATORBUG-14889
Task-numer: QTCREATORBUG-14741
Change-Id: I90454e8970a9d04033d56beeb0c6d7a0d4e6cc62
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
This commit is contained in:
Nikolai Kosjar
2015-08-20 16:20:59 +02:00
parent 87df7c4092
commit e0594fc9b9
2 changed files with 20 additions and 4 deletions
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6
src/libs/cplusplus/LookupContext.cpp
View File

@@ -1001,13 +1001,11 @@ LookupScope *LookupScopePrivate::lookupType_helper(
}
if (const QualifiedNameId *qName = name->asQualifiedNameId()) {
ProcessedSet innerProcessed;
if (! qName->base())
return globalNamespace()->d->lookupType_helper(qName->name(), &innerProcessed, true, origin);
return globalNamespace()->d->lookupType_helper(qName->name(), processed, true, origin);
if (LookupScope *binding = lookupType_helper(qName->base(), processed, true, origin))
return binding->d->lookupType_helper(qName->name(), &innerProcessed, false, origin);
return binding->d->lookupType_helper(qName->name(), processed, false, origin);
return 0;

18
src/plugins/cpptools/cppcompletion_test.cpp
View File

@@ -3235,6 +3235,24 @@ void CppToolsPlugin::test_completion_data()
<< QLatin1String("Foo")
<< QLatin1String("bar"));
QTest::newRow("typedef for templates in namespace") << _(
"namespace N {\n"
"\n"
"struct Data { int x; };\n"
"template <typename T> struct Foo { T member; };\n"
"typedef Foo<Data> Bar;\n"
"\n"
"} // N\n"
"\n"
"\n"
"void f()\n"
"{\n"
" N::Bar o;\n"
" @\n"
"}\n"
) << _("o.member.") << (QStringList()
<< QLatin1String("Data")
<< QLatin1String("x"));
}
void CppToolsPlugin::test_completion_member_access_operator()