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implement semantic analysis and AST representation for AliasType (aka typedefs in C).

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Swift SVN r144
This commit is contained in:
Chris Lattner
2010-08-04 05:14:57 +00:00
parent 8f86874c19
commit a8916a6106
8 changed files with 90 additions and 8 deletions
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27
lib/AST/ASTContext.cpp
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@@ -27,6 +27,9 @@ using namespace swift;
/// IdentifierTableMapTy - This is the type underlying IdentifierTable.
typedef llvm::StringMap<char, llvm::BumpPtrAllocator&> IdentifierTableMapTy;
/// AliasTypesMapTy - This is the type underlying AliasTypes.
typedef llvm::StringMap<AliasType*, llvm::BumpPtrAllocator&> AliasTypesMapTy;
/// TupleTypesMapTy - This is the actual type underlying ASTContext::TupleTypes.
typedef llvm::FoldingSet<TupleType> TupleTypesMapTy;
@@ -36,6 +39,7 @@ typedef llvm::DenseMap<std::pair<Type*,Type*>, FunctionType*>FunctionTypesMapTy;
ASTContext::ASTContext(llvm::SourceMgr &sourcemgr)
: Allocator(new llvm::BumpPtrAllocator()),
IdentifierTable(new IdentifierTableMapTy(*Allocator)),
AliasTypes(new AliasTypesMapTy(*Allocator)),
TupleTypes(new TupleTypesMapTy()),
FunctionTypes(new FunctionTypesMapTy()),
SourceMgr(sourcemgr),
@@ -45,6 +49,7 @@ ASTContext::ASTContext(llvm::SourceMgr &sourcemgr)
}
ASTContext::~ASTContext() {
delete (AliasTypesMapTy*)AliasTypes; AliasTypes = 0;
delete (TupleTypesMapTy*)TupleTypes; TupleTypes = 0;
delete (FunctionTypesMapTy*)FunctionTypes; FunctionTypes = 0;
delete (IdentifierTableMapTy*)IdentifierTable;
@@ -81,6 +86,9 @@ Type *ASTContext::getCanonicalType(Type *T) {
switch (T->Kind) {
case BuiltinIntKind:
case BuiltinDependentKind: assert(0 && "These are always canonical");
case AliasTypeKind:
return T->CanonicalType =
getCanonicalType(llvm::cast<AliasType>(T)->UnderlyingType);
case TupleTypeKind: {
llvm::SmallVector<TupleTypeElt, 8> CanElts;
TupleType *TT = llvm::cast<TupleType>(T);
@@ -112,6 +120,25 @@ void TupleType::Profile(llvm::FoldingSetNodeID &ID, const TupleTypeElt *Fields,
}
}
/// getNamedType - This method does a lookup for the specified type name. If
/// no type with the specified name exists, null is returned.
Type *ASTContext::getNamedType(Identifier Name) {
AliasTypesMapTy &Table = *((AliasTypesMapTy*)AliasTypes);
AliasTypesMapTy::iterator It = Table.find(Name.get());
return It == Table.end() ? 0 : It->second;
}
/// getAliasType - Return a new alias type. This returns null if there is a
/// conflict with an already existing alias type of the same name.
AliasType *ASTContext::getAliasType(Identifier Name, Type *Underlying) {
AliasTypesMapTy &Table = *((AliasTypesMapTy*)AliasTypes);
AliasType *&Entry = Table.GetOrCreateValue(Name.get()).getValue();
if (Entry != 0) return 0;
return Entry = new (*this) AliasType(Name, Underlying);
}
/// getTupleType - Return the uniqued tuple type with the specified elements.
TupleType *ASTContext::getTupleType(const TupleTypeElt *Fields,
unsigned NumFields) {