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authorrdivacky <rdivacky@FreeBSD.org>2010-02-16 09:31:36 +0000
committerrdivacky <rdivacky@FreeBSD.org>2010-02-16 09:31:36 +0000
commitfd035e6496665b1f1197868e21cb0a4594e8db6e (patch)
tree53010172e19c77ea447bcd89e117cda052ab52e0 /lib/AST/ASTDiagnostic.cpp
parent2fce988e86bc01829142e4362d4eff1af0925147 (diff)
downloadFreeBSD-src-fd035e6496665b1f1197868e21cb0a4594e8db6e.zip
FreeBSD-src-fd035e6496665b1f1197868e21cb0a4594e8db6e.tar.gz
Update clang to r96341.
Diffstat (limited to 'lib/AST/ASTDiagnostic.cpp')
-rw-r--r--lib/AST/ASTDiagnostic.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/lib/AST/ASTDiagnostic.cpp b/lib/AST/ASTDiagnostic.cpp
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+//===--- ASTDiagnostic.cpp - Diagnostic Printing Hooks for AST Nodes ------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements a diagnostic formatting hook for AST elements.
+//
+//===----------------------------------------------------------------------===//
+#include "clang/AST/ASTDiagnostic.h"
+
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/Type.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace clang;
+
+/// Determines whether we should have an a.k.a. clause when
+/// pretty-printing a type. There are three main criteria:
+///
+/// 1) Some types provide very minimal sugar that doesn't impede the
+/// user's understanding --- for example, elaborated type
+/// specifiers. If this is all the sugar we see, we don't want an
+/// a.k.a. clause.
+/// 2) Some types are technically sugared but are much more familiar
+/// when seen in their sugared form --- for example, va_list,
+/// vector types, and the magic Objective C types. We don't
+/// want to desugar these, even if we do produce an a.k.a. clause.
+/// 3) Some types may have already been desugared previously in this diagnostic.
+/// if this is the case, doing another "aka" would just be clutter.
+///
+static bool ShouldAKA(ASTContext &Context, QualType QT,
+ const Diagnostic::ArgumentValue *PrevArgs,
+ unsigned NumPrevArgs,
+ QualType &DesugaredQT) {
+ QualType InputTy = QT;
+
+ bool AKA = false;
+ QualifierCollector Qc;
+
+ while (true) {
+ const Type *Ty = Qc.strip(QT);
+
+ // Don't aka just because we saw an elaborated type...
+ if (isa<ElaboratedType>(Ty)) {
+ QT = cast<ElaboratedType>(Ty)->desugar();
+ continue;
+ }
+
+ // ...or a qualified name type...
+ if (isa<QualifiedNameType>(Ty)) {
+ QT = cast<QualifiedNameType>(Ty)->desugar();
+ continue;
+ }
+
+ // ...or a substituted template type parameter.
+ if (isa<SubstTemplateTypeParmType>(Ty)) {
+ QT = cast<SubstTemplateTypeParmType>(Ty)->desugar();
+ continue;
+ }
+
+ // Don't desugar template specializations.
+ if (isa<TemplateSpecializationType>(Ty))
+ break;
+
+ // Don't desugar magic Objective-C types.
+ if (QualType(Ty,0) == Context.getObjCIdType() ||
+ QualType(Ty,0) == Context.getObjCClassType() ||
+ QualType(Ty,0) == Context.getObjCSelType() ||
+ QualType(Ty,0) == Context.getObjCProtoType())
+ break;
+
+ // Don't desugar va_list.
+ if (QualType(Ty,0) == Context.getBuiltinVaListType())
+ break;
+
+ // Otherwise, do a single-step desugar.
+ QualType Underlying;
+ bool IsSugar = false;
+ switch (Ty->getTypeClass()) {
+#define ABSTRACT_TYPE(Class, Base)
+#define TYPE(Class, Base) \
+case Type::Class: { \
+const Class##Type *CTy = cast<Class##Type>(Ty); \
+if (CTy->isSugared()) { \
+IsSugar = true; \
+Underlying = CTy->desugar(); \
+} \
+break; \
+}
+#include "clang/AST/TypeNodes.def"
+ }
+
+ // If it wasn't sugared, we're done.
+ if (!IsSugar)
+ break;
+
+ // If the desugared type is a vector type, we don't want to expand
+ // it, it will turn into an attribute mess. People want their "vec4".
+ if (isa<VectorType>(Underlying))
+ break;
+
+ // Don't desugar through the primary typedef of an anonymous type.
+ if (isa<TagType>(Underlying) && isa<TypedefType>(QT))
+ if (cast<TagType>(Underlying)->getDecl()->getTypedefForAnonDecl() ==
+ cast<TypedefType>(QT)->getDecl())
+ break;
+
+ // Otherwise, we're tearing through something opaque; note that
+ // we'll eventually need an a.k.a. clause and keep going.
+ AKA = true;
+ QT = Underlying;
+ continue;
+ }
+
+ // If we never tore through opaque sugar, don't print aka.
+ if (!AKA) return false;
+
+ // If we did, check to see if we already desugared this type in this
+ // diagnostic. If so, don't do it again.
+ for (unsigned i = 0; i != NumPrevArgs; ++i) {
+ // TODO: Handle ak_declcontext case.
+ if (PrevArgs[i].first == Diagnostic::ak_qualtype) {
+ void *Ptr = (void*)PrevArgs[i].second;
+ QualType PrevTy(QualType::getFromOpaquePtr(Ptr));
+ if (PrevTy == InputTy)
+ return false;
+ }
+ }
+
+ DesugaredQT = Qc.apply(QT);
+ return true;
+}
+
+/// \brief Convert the given type to a string suitable for printing as part of
+/// a diagnostic.
+///
+/// \param Context the context in which the type was allocated
+/// \param Ty the type to print
+static std::string
+ConvertTypeToDiagnosticString(ASTContext &Context, QualType Ty,
+ const Diagnostic::ArgumentValue *PrevArgs,
+ unsigned NumPrevArgs) {
+ // FIXME: Playing with std::string is really slow.
+ std::string S = Ty.getAsString(Context.PrintingPolicy);
+
+ // Consider producing an a.k.a. clause if removing all the direct
+ // sugar gives us something "significantly different".
+
+ QualType DesugaredTy;
+ if (ShouldAKA(Context, Ty, PrevArgs, NumPrevArgs, DesugaredTy)) {
+ S = "'"+S+"' (aka '";
+ S += DesugaredTy.getAsString(Context.PrintingPolicy);
+ S += "')";
+ return S;
+ }
+
+ S = "'" + S + "'";
+ return S;
+}
+
+void clang::FormatASTNodeDiagnosticArgument(Diagnostic::ArgumentKind Kind,
+ intptr_t Val,
+ const char *Modifier,
+ unsigned ModLen,
+ const char *Argument,
+ unsigned ArgLen,
+ const Diagnostic::ArgumentValue *PrevArgs,
+ unsigned NumPrevArgs,
+ llvm::SmallVectorImpl<char> &Output,
+ void *Cookie) {
+ ASTContext &Context = *static_cast<ASTContext*>(Cookie);
+
+ std::string S;
+ bool NeedQuotes = true;
+
+ switch (Kind) {
+ default: assert(0 && "unknown ArgumentKind");
+ case Diagnostic::ak_qualtype: {
+ assert(ModLen == 0 && ArgLen == 0 &&
+ "Invalid modifier for QualType argument");
+
+ QualType Ty(QualType::getFromOpaquePtr(reinterpret_cast<void*>(Val)));
+ S = ConvertTypeToDiagnosticString(Context, Ty, PrevArgs, NumPrevArgs);
+ NeedQuotes = false;
+ break;
+ }
+ case Diagnostic::ak_declarationname: {
+ DeclarationName N = DeclarationName::getFromOpaqueInteger(Val);
+ S = N.getAsString();
+
+ if (ModLen == 9 && !memcmp(Modifier, "objcclass", 9) && ArgLen == 0)
+ S = '+' + S;
+ else if (ModLen == 12 && !memcmp(Modifier, "objcinstance", 12)
+ && ArgLen==0)
+ S = '-' + S;
+ else
+ assert(ModLen == 0 && ArgLen == 0 &&
+ "Invalid modifier for DeclarationName argument");
+ break;
+ }
+ case Diagnostic::ak_nameddecl: {
+ bool Qualified;
+ if (ModLen == 1 && Modifier[0] == 'q' && ArgLen == 0)
+ Qualified = true;
+ else {
+ assert(ModLen == 0 && ArgLen == 0 &&
+ "Invalid modifier for NamedDecl* argument");
+ Qualified = false;
+ }
+ reinterpret_cast<NamedDecl*>(Val)->
+ getNameForDiagnostic(S, Context.PrintingPolicy, Qualified);
+ break;
+ }
+ case Diagnostic::ak_nestednamespec: {
+ llvm::raw_string_ostream OS(S);
+ reinterpret_cast<NestedNameSpecifier*>(Val)->print(OS,
+ Context.PrintingPolicy);
+ NeedQuotes = false;
+ break;
+ }
+ case Diagnostic::ak_declcontext: {
+ DeclContext *DC = reinterpret_cast<DeclContext *> (Val);
+ assert(DC && "Should never have a null declaration context");
+
+ if (DC->isTranslationUnit()) {
+ // FIXME: Get these strings from some localized place
+ if (Context.getLangOptions().CPlusPlus)
+ S = "the global namespace";
+ else
+ S = "the global scope";
+ } else if (TypeDecl *Type = dyn_cast<TypeDecl>(DC)) {
+ S = ConvertTypeToDiagnosticString(Context,
+ Context.getTypeDeclType(Type),
+ PrevArgs, NumPrevArgs);
+ } else {
+ // FIXME: Get these strings from some localized place
+ NamedDecl *ND = cast<NamedDecl>(DC);
+ if (isa<NamespaceDecl>(ND))
+ S += "namespace ";
+ else if (isa<ObjCMethodDecl>(ND))
+ S += "method ";
+ else if (isa<FunctionDecl>(ND))
+ S += "function ";
+
+ S += "'";
+ ND->getNameForDiagnostic(S, Context.PrintingPolicy, true);
+ S += "'";
+ }
+ NeedQuotes = false;
+ break;
+ }
+ }
+
+ if (NeedQuotes)
+ Output.push_back('\'');
+
+ Output.append(S.begin(), S.end());
+
+ if (NeedQuotes)
+ Output.push_back('\'');
+}
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