forked from OSchip/llvm-project
348 lines
10 KiB
C++
348 lines
10 KiB
C++
//===--- Comment.cpp - Comment AST node implementation --------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Comment.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/Basic/CharInfo.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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namespace clang {
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namespace comments {
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const char *Comment::getCommentKindName() const {
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switch (getCommentKind()) {
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case NoCommentKind: return "NoCommentKind";
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#define ABSTRACT_COMMENT(COMMENT)
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#define COMMENT(CLASS, PARENT) \
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case CLASS##Kind: \
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return #CLASS;
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#include "clang/AST/CommentNodes.inc"
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#undef COMMENT
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#undef ABSTRACT_COMMENT
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}
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llvm_unreachable("Unknown comment kind!");
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}
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namespace {
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struct good {};
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struct bad {};
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template <typename T>
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good implements_child_begin_end(Comment::child_iterator (T::*)() const) {
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return good();
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}
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LLVM_ATTRIBUTE_UNUSED
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static inline bad implements_child_begin_end(
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Comment::child_iterator (Comment::*)() const) {
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return bad();
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}
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#define ASSERT_IMPLEMENTS_child_begin(function) \
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(void) good(implements_child_begin_end(function))
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LLVM_ATTRIBUTE_UNUSED
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static inline void CheckCommentASTNodes() {
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#define ABSTRACT_COMMENT(COMMENT)
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#define COMMENT(CLASS, PARENT) \
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ASSERT_IMPLEMENTS_child_begin(&CLASS::child_begin); \
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ASSERT_IMPLEMENTS_child_begin(&CLASS::child_end);
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#include "clang/AST/CommentNodes.inc"
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#undef COMMENT
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#undef ABSTRACT_COMMENT
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}
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#undef ASSERT_IMPLEMENTS_child_begin
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} // end unnamed namespace
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Comment::child_iterator Comment::child_begin() const {
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switch (getCommentKind()) {
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case NoCommentKind: llvm_unreachable("comment without a kind");
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#define ABSTRACT_COMMENT(COMMENT)
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#define COMMENT(CLASS, PARENT) \
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case CLASS##Kind: \
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return static_cast<const CLASS *>(this)->child_begin();
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#include "clang/AST/CommentNodes.inc"
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#undef COMMENT
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#undef ABSTRACT_COMMENT
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}
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llvm_unreachable("Unknown comment kind!");
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}
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Comment::child_iterator Comment::child_end() const {
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switch (getCommentKind()) {
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case NoCommentKind: llvm_unreachable("comment without a kind");
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#define ABSTRACT_COMMENT(COMMENT)
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#define COMMENT(CLASS, PARENT) \
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case CLASS##Kind: \
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return static_cast<const CLASS *>(this)->child_end();
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#include "clang/AST/CommentNodes.inc"
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#undef COMMENT
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#undef ABSTRACT_COMMENT
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}
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llvm_unreachable("Unknown comment kind!");
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}
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bool TextComment::isWhitespaceNoCache() const {
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for (StringRef::const_iterator I = Text.begin(), E = Text.end();
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I != E; ++I) {
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if (!clang::isWhitespace(*I))
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return false;
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}
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return true;
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}
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bool ParagraphComment::isWhitespaceNoCache() const {
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for (child_iterator I = child_begin(), E = child_end(); I != E; ++I) {
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if (const TextComment *TC = dyn_cast<TextComment>(*I)) {
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if (!TC->isWhitespace())
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return false;
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} else
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return false;
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}
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return true;
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}
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const char *ParamCommandComment::getDirectionAsString(PassDirection D) {
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switch (D) {
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case ParamCommandComment::In:
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return "[in]";
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case ParamCommandComment::Out:
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return "[out]";
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case ParamCommandComment::InOut:
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return "[in,out]";
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}
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llvm_unreachable("unknown PassDirection");
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}
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void DeclInfo::fill() {
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assert(!IsFilled);
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// Set defaults.
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Kind = OtherKind;
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TemplateKind = NotTemplate;
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IsObjCMethod = false;
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IsInstanceMethod = false;
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IsClassMethod = false;
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ParamVars = None;
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TemplateParameters = nullptr;
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if (!CommentDecl) {
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// If there is no declaration, the defaults is our only guess.
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IsFilled = true;
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return;
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}
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CurrentDecl = CommentDecl;
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Decl::Kind K = CommentDecl->getKind();
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switch (K) {
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default:
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// Defaults are should be good for declarations we don't handle explicitly.
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break;
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case Decl::Function:
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case Decl::CXXMethod:
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case Decl::CXXConstructor:
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case Decl::CXXDestructor:
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case Decl::CXXConversion: {
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const FunctionDecl *FD = cast<FunctionDecl>(CommentDecl);
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Kind = FunctionKind;
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ParamVars = llvm::makeArrayRef(FD->param_begin(), FD->getNumParams());
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ReturnType = FD->getReturnType();
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unsigned NumLists = FD->getNumTemplateParameterLists();
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if (NumLists != 0) {
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TemplateKind = TemplateSpecialization;
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TemplateParameters =
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FD->getTemplateParameterList(NumLists - 1);
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}
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if (K == Decl::CXXMethod || K == Decl::CXXConstructor ||
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K == Decl::CXXDestructor || K == Decl::CXXConversion) {
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const CXXMethodDecl *MD = cast<CXXMethodDecl>(CommentDecl);
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IsInstanceMethod = MD->isInstance();
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IsClassMethod = !IsInstanceMethod;
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}
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break;
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}
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case Decl::ObjCMethod: {
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const ObjCMethodDecl *MD = cast<ObjCMethodDecl>(CommentDecl);
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Kind = FunctionKind;
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ParamVars = llvm::makeArrayRef(MD->param_begin(), MD->param_size());
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ReturnType = MD->getReturnType();
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IsObjCMethod = true;
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IsInstanceMethod = MD->isInstanceMethod();
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IsClassMethod = !IsInstanceMethod;
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break;
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}
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case Decl::FunctionTemplate: {
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const FunctionTemplateDecl *FTD = cast<FunctionTemplateDecl>(CommentDecl);
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Kind = FunctionKind;
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TemplateKind = Template;
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const FunctionDecl *FD = FTD->getTemplatedDecl();
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ParamVars = llvm::makeArrayRef(FD->param_begin(), FD->getNumParams());
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ReturnType = FD->getReturnType();
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TemplateParameters = FTD->getTemplateParameters();
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break;
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}
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case Decl::ClassTemplate: {
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const ClassTemplateDecl *CTD = cast<ClassTemplateDecl>(CommentDecl);
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Kind = ClassKind;
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TemplateKind = Template;
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TemplateParameters = CTD->getTemplateParameters();
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break;
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}
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case Decl::ClassTemplatePartialSpecialization: {
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const ClassTemplatePartialSpecializationDecl *CTPSD =
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cast<ClassTemplatePartialSpecializationDecl>(CommentDecl);
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Kind = ClassKind;
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TemplateKind = TemplatePartialSpecialization;
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TemplateParameters = CTPSD->getTemplateParameters();
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break;
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}
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case Decl::ClassTemplateSpecialization:
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Kind = ClassKind;
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TemplateKind = TemplateSpecialization;
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break;
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case Decl::Record:
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case Decl::CXXRecord:
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Kind = ClassKind;
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break;
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case Decl::Var:
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case Decl::Field:
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case Decl::EnumConstant:
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case Decl::ObjCIvar:
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case Decl::ObjCAtDefsField:
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Kind = VariableKind;
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break;
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case Decl::Namespace:
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Kind = NamespaceKind;
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break;
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case Decl::Typedef: {
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Kind = TypedefKind;
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// If this is a typedef to something we consider a function, extract
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// arguments and return type.
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const TypedefDecl *TD = cast<TypedefDecl>(CommentDecl);
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const TypeSourceInfo *TSI = TD->getTypeSourceInfo();
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if (!TSI)
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break;
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TypeLoc TL = TSI->getTypeLoc().getUnqualifiedLoc();
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while (true) {
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TL = TL.IgnoreParens();
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// Look through qualified types.
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if (QualifiedTypeLoc QualifiedTL = TL.getAs<QualifiedTypeLoc>()) {
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TL = QualifiedTL.getUnqualifiedLoc();
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continue;
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}
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// Look through pointer types.
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if (PointerTypeLoc PointerTL = TL.getAs<PointerTypeLoc>()) {
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TL = PointerTL.getPointeeLoc().getUnqualifiedLoc();
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continue;
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}
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// Look through reference types.
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if (ReferenceTypeLoc ReferenceTL = TL.getAs<ReferenceTypeLoc>()) {
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TL = ReferenceTL.getPointeeLoc().getUnqualifiedLoc();
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continue;
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}
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// Look through adjusted types.
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if (AdjustedTypeLoc ATL = TL.getAs<AdjustedTypeLoc>()) {
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TL = ATL.getOriginalLoc();
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continue;
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}
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if (BlockPointerTypeLoc BlockPointerTL =
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TL.getAs<BlockPointerTypeLoc>()) {
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TL = BlockPointerTL.getPointeeLoc().getUnqualifiedLoc();
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continue;
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}
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if (MemberPointerTypeLoc MemberPointerTL =
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TL.getAs<MemberPointerTypeLoc>()) {
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TL = MemberPointerTL.getPointeeLoc().getUnqualifiedLoc();
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continue;
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}
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if (ElaboratedTypeLoc ETL = TL.getAs<ElaboratedTypeLoc>()) {
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TL = ETL.getNamedTypeLoc();
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continue;
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}
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// Is this a typedef for a function type?
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if (FunctionTypeLoc FTL = TL.getAs<FunctionTypeLoc>()) {
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Kind = FunctionKind;
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ParamVars = FTL.getParams();
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ReturnType = FTL.getReturnLoc().getType();
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break;
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}
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if (TemplateSpecializationTypeLoc STL =
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TL.getAs<TemplateSpecializationTypeLoc>()) {
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// If we have a typedef to a template specialization with exactly one
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// template argument of a function type, this looks like std::function,
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// boost::function, or other function wrapper. Treat these typedefs as
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// functions.
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if (STL.getNumArgs() != 1)
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break;
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TemplateArgumentLoc MaybeFunction = STL.getArgLoc(0);
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if (MaybeFunction.getArgument().getKind() != TemplateArgument::Type)
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break;
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TypeSourceInfo *MaybeFunctionTSI = MaybeFunction.getTypeSourceInfo();
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TypeLoc TL = MaybeFunctionTSI->getTypeLoc().getUnqualifiedLoc();
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if (FunctionTypeLoc FTL = TL.getAs<FunctionTypeLoc>()) {
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Kind = FunctionKind;
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ParamVars = FTL.getParams();
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ReturnType = FTL.getReturnLoc().getType();
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}
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break;
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}
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break;
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}
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break;
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}
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case Decl::TypeAlias:
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Kind = TypedefKind;
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break;
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case Decl::TypeAliasTemplate: {
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const TypeAliasTemplateDecl *TAT = cast<TypeAliasTemplateDecl>(CommentDecl);
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Kind = TypedefKind;
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TemplateKind = Template;
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TemplateParameters = TAT->getTemplateParameters();
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break;
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}
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case Decl::Enum:
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Kind = EnumKind;
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break;
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}
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IsFilled = true;
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}
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StringRef ParamCommandComment::getParamName(const FullComment *FC) const {
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assert(isParamIndexValid());
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if (isVarArgParam())
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return "...";
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return FC->getDeclInfo()->ParamVars[getParamIndex()]->getName();
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}
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StringRef TParamCommandComment::getParamName(const FullComment *FC) const {
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assert(isPositionValid());
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const TemplateParameterList *TPL = FC->getDeclInfo()->TemplateParameters;
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for (unsigned i = 0, e = getDepth(); i != e; ++i) {
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if (i == e-1)
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return TPL->getParam(getIndex(i))->getName();
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const NamedDecl *Param = TPL->getParam(getIndex(i));
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if (const TemplateTemplateParmDecl *TTP =
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dyn_cast<TemplateTemplateParmDecl>(Param))
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TPL = TTP->getTemplateParameters();
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}
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return "";
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}
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} // end namespace comments
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} // end namespace clang
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