C++: fix built-in code model to work with shared_ptr on MSVC 2017

These changes target Find Usages feature to work with shared_ptr.
Improve libs/3rdparty/cplusplus and plugins/cplusplus:
parse __declspec() attribute,
call to variadic function template without specified template arguments,
if constexpr,
c++11 attributes [[value]],
function templates with default parameters,
resolve order for function vs template with default parameter,
template operator->() with default arguments,
template specialization with numeric values,
find best partial specialization,
fix partial specialization for non-first specialized argument

Fixes: QTCREATORBUG-7866
Fixes: QTCREATORBUG-20781
Fixes: QTCREATORBUG-22857
Fixes: QTCREATORBUG-17825
Change-Id: I31a080f7729edfb2ee9650f1aff48daeba5a673b
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Nikolai Kosjar <pinaceae.pinus@gmail.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/libs/3rdparty/cplusplus/ASTMatch0.cpp b/src/libs/3rdparty/cplusplus/ASTMatch0.cpp
index 66c6a1be4d..1a82d29f6e 100644
--- a/src/libs/3rdparty/cplusplus/ASTMatch0.cpp
+++ b/src/libs/3rdparty/cplusplus/ASTMatch0.cpp
@@ -72,6 +72,22 @@ bool GnuAttributeSpecifierAST::match0(AST *pattern, ASTMatcher *matcher)
     return false;
 }
 
+bool MsvcDeclspecSpecifierAST::match0(AST *pattern, ASTMatcher *matcher)
+{
+    if (MsvcDeclspecSpecifierAST *_other = pattern->asMsvcDeclspecSpecifier())
+        return matcher->match(this, _other);
+
+    return false;
+}
+
+bool StdAttributeSpecifierAST::match0(AST *pattern, ASTMatcher *matcher)
+{
+    if (StdAttributeSpecifierAST *_other = pattern->asStdAttributeSpecifier())
+        return matcher->match(this, _other);
+
+    return false;
+}
+
 bool GnuAttributeAST::match0(AST *pattern, ASTMatcher *matcher)
 {
     if (GnuAttributeAST *_other = pattern->asGnuAttribute())