73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
//===- PrintFunctionNames.cpp ---------------------------------------------===//
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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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//
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// Example clang plugin which simply prints the names of all the top-level decls
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// in the input file.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/FrontendPluginRegistry.h"
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#include "clang/AST/AST.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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namespace {
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class PrintFunctionsConsumer : public ASTConsumer {
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public:
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virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
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for (DeclGroupRef::iterator i = DG.begin(), e = DG.end(); i != e; ++i) {
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const Decl *D = *i;
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if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
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llvm::errs() << "top-level-decl: \"" << ND->getNameAsString() << "\"\n";
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}
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return true;
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}
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};
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class PrintFunctionNamesAction : public PluginASTAction {
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protected:
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std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
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llvm::StringRef) {
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return llvm::make_unique<PrintFunctionsConsumer>();
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}
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bool ParseArgs(const CompilerInstance &CI,
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const std::vector<std::string>& args) {
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for (unsigned i = 0, e = args.size(); i != e; ++i) {
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llvm::errs() << "PrintFunctionNames arg = " << args[i] << "\n";
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// Example error handling.
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if (args[i] == "-an-error") {
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DiagnosticsEngine &D = CI.getDiagnostics();
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unsigned DiagID = D.getCustomDiagID(DiagnosticsEngine::Error,
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"invalid argument '%0'");
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D.Report(DiagID) << args[i];
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return false;
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}
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}
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if (args.size() && args[0] == "help")
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PrintHelp(llvm::errs());
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return true;
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}
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void PrintHelp(llvm::raw_ostream& ros) {
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ros << "Help for PrintFunctionNames plugin goes here\n";
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}
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};
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}
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static FrontendPluginRegistry::Add<PrintFunctionNamesAction>
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X("print-fns", "print function names");
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