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Implemented Function Template Import in the ASTImporter class. #161

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Implemented Function Template Import in the ASTImporter class. #161

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67 changes: 67 additions & 0 deletions interpreter/llvm/src/tools/clang/lib/AST/ASTImporter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,7 @@ namespace clang {
ClassTemplateSpecializationDecl *D);
Decl *VisitVarTemplateDecl(VarTemplateDecl *D);
Decl *VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D);
Decl *VisitFunctionTemplateDecl(FunctionTemplateDecl *D);

// Importing statements
Stmt *VisitStmt(Stmt *S);
Expand Down Expand Up @@ -4367,6 +4368,72 @@ Decl *ASTNodeImporter::VisitVarTemplateSpecializationDecl(
return D2;
}

Decl *ASTNodeImporter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
// Import the major distinguishing characteristics of this function.
DeclContext *DC, *LexicalDC;
DeclarationName Name;
SourceLocation Loc;
if (ImportDeclParts(D, DC, LexicalDC, Name, Loc))
return nullptr;

DeclarationNameInfo NameInfo(Name, Loc);

QualType FromTy = D->getTemplatedDecl()->getType();

// Import the type.
QualType T = Importer.Import(FromTy);
if (T.isNull())
return nullptr;

TypeSourceInfo *TInfo
= Importer.Import(D->getTemplatedDecl()->getTypeSourceInfo());

// Import the function parameters.
SmallVector<ParmVarDecl *, 8> Parameters;
TypeLoc ToTypeLoc = TInfo->getTypeLoc();
unsigned I = 0;
for (auto P : D->getTemplatedDecl()->params()) {
ParmVarDecl *ToP = cast_or_null<ParmVarDecl>(Importer.Import(P));
ToP->setScopeInfo(P->getFunctionScopeDepth(), P->getFunctionScopeIndex());
if (!ToP)
return nullptr;

Parameters.push_back(ToP);

if (FunctionProtoTypeLoc ToProtoLoc
= ToTypeLoc.getAs<FunctionProtoTypeLoc>()) {
ToProtoLoc.setParam(I, Parameters[I]);
I++;
}
}

FunctionDecl *ToFunction
= FunctionDecl::Create(Importer.getToContext(), DC,
Loc, NameInfo, T, TInfo,
D->getTemplatedDecl()->getStorageClass(),
D->getTemplatedDecl()->isInlineSpecified(),
D->getTemplatedDecl()->hasWrittenPrototype(),
D->getTemplatedDecl()->isConstexpr());

// Set the parameters.
for (unsigned I = 0, N = Parameters.size(); I != N; ++I) {
Parameters[I]->setOwningFunction(ToFunction);
ToFunction->addDeclInternal(Parameters[I]);
}
ToFunction->setParams(Parameters);

FunctionTemplateDecl *ToFunctionTemplate
= FunctionTemplateDecl::Create(Importer.getToContext(), DC,
Loc, Name,
D->getTemplateParameters(),
ToFunction);

ToFunction->setDescribedFunctionTemplate(ToFunctionTemplate);

LexicalDC->addDeclInternal(ToFunctionTemplate);
return ToFunctionTemplate;
}

//----------------------------------------------------------------------------
// Import Statements
//----------------------------------------------------------------------------
Expand Down