forked from OSchip/llvm-project
50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
//===-- DataCollection.cpp --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/DataCollection.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Lex/Lexer.h"
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namespace clang {
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namespace data_collection {
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/// Prints the macro name that contains the given SourceLocation into the given
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/// raw_string_ostream.
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static void printMacroName(llvm::raw_string_ostream &MacroStack,
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ASTContext &Context, SourceLocation Loc) {
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MacroStack << Lexer::getImmediateMacroName(Loc, Context.getSourceManager(),
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Context.getLangOpts());
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// Add an empty space at the end as a padding to prevent
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// that macro names concatenate to the names of other macros.
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MacroStack << " ";
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}
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/// Returns a string that represents all macro expansions that expanded into the
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/// given SourceLocation.
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///
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/// If 'getMacroStack(A) == getMacroStack(B)' is true, then the SourceLocations
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/// A and B are expanded from the same macros in the same order.
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std::string getMacroStack(SourceLocation Loc, ASTContext &Context) {
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std::string MacroStack;
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llvm::raw_string_ostream MacroStackStream(MacroStack);
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SourceManager &SM = Context.getSourceManager();
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// Iterate over all macros that expanded into the given SourceLocation.
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while (Loc.isMacroID()) {
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// Add the macro name to the stream.
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printMacroName(MacroStackStream, Context, Loc);
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Loc = SM.getImmediateMacroCallerLoc(Loc);
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}
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MacroStackStream.flush();
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return MacroStack;
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}
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} // end namespace data_collection
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} // end namespace clang
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