Improved semantic analysis and AST respresentation for function
templates.
For example, this now type-checks (but does not instantiate the body
of deref<int>):
template<typename T> T& deref(T* t) { return *t; }
void test(int *ip) {
int &ir = deref(ip);
}
Specific changes/additions:
* Template argument deduction from a call to a function template.
* Instantiation of a function template specializations (just the
declarations) from the template arguments deduced from a call.
* FunctionTemplateDecls are stored directly in declaration contexts
and found via name lookup (all forms), rather than finding the
FunctionDecl and then realizing it is a template. This is
responsible for most of the churn, since some of the core
declaration matching and lookup code assumes that all functions are
FunctionDecls.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74213 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 466015a..f00acda 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -1625,7 +1625,8 @@
Conv = Conversions->function_begin(),
ConvEnd = Conversions->function_end();
Conv != ConvEnd; ++Conv) {
- if (*Conv == Conversion->getPreviousDeclaration()) {
+ if (*Conv
+ == cast_or_null<NamedDecl>(Conversion->getPreviousDeclaration())) {
*Conv = Conversion;
return DeclPtrTy::make(Conversion);
}