forked from OSchip/llvm-project
117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
//===---- ClangQuery.cpp - clang-query tool -------------------------------===//
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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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// This tool is for interactive exploration of the Clang AST using AST matchers.
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// It currently allows the user to enter a matcher at an interactive prompt and
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// view the resulting bindings as diagnostics, AST pretty prints or AST dumps.
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// Example session:
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//
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// $ cat foo.c
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// void foo(void) {}
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// $ clang-query foo.c --
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// clang-query> match functionDecl()
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//
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// Match #1:
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//
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// foo.c:1:1: note: "root" binds here
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// void foo(void) {}
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// ^~~~~~~~~~~~~~~~~
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// 1 match.
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//
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//===----------------------------------------------------------------------===//
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#include "Query.h"
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#include "QueryParser.h"
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#include "QuerySession.h"
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#include "clang/Frontend/ASTUnit.h"
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#include "clang/Tooling/CommonOptionsParser.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/LineEditor/LineEditor.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Signals.h"
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#include <fstream>
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#include <string>
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using namespace clang;
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using namespace clang::ast_matchers;
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using namespace clang::ast_matchers::dynamic;
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using namespace clang::query;
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using namespace clang::tooling;
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using namespace llvm;
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static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
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static cl::OptionCategory ClangQueryCategory("clang-query options");
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static cl::list<std::string> Commands("c", cl::desc("Specify command to run"),
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cl::value_desc("command"),
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cl::cat(ClangQueryCategory));
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static cl::list<std::string> CommandFiles("f",
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cl::desc("Read commands from file"),
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cl::value_desc("file"),
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cl::cat(ClangQueryCategory));
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int main(int argc, const char **argv) {
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llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
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CommonOptionsParser OptionsParser(argc, argv, ClangQueryCategory);
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if (!Commands.empty() && !CommandFiles.empty()) {
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llvm::errs() << argv[0] << ": cannot specify both -c and -f\n";
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return 1;
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}
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ClangTool Tool(OptionsParser.getCompilations(),
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OptionsParser.getSourcePathList());
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std::vector<std::unique_ptr<ASTUnit>> ASTs;
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if (Tool.buildASTs(ASTs) != 0)
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return 1;
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QuerySession QS(ASTs);
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if (!Commands.empty()) {
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for (auto I = Commands.begin(), E = Commands.end(); I != E; ++I) {
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QueryRef Q = QueryParser::parse(*I, QS);
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if (!Q->run(llvm::outs(), QS))
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return 1;
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}
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} else if (!CommandFiles.empty()) {
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for (auto I = CommandFiles.begin(), E = CommandFiles.end(); I != E; ++I) {
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std::ifstream Input(I->c_str());
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if (!Input.is_open()) {
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llvm::errs() << argv[0] << ": cannot open " << *I << "\n";
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return 1;
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}
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while (Input.good()) {
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std::string Line;
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std::getline(Input, Line);
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QueryRef Q = QueryParser::parse(Line, QS);
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if (!Q->run(llvm::outs(), QS))
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return 1;
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}
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}
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} else {
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LineEditor LE("clang-query");
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LE.setListCompleter([&QS](StringRef Line, size_t Pos) {
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return QueryParser::complete(Line, Pos, QS);
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});
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while (llvm::Optional<std::string> Line = LE.readLine()) {
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QueryRef Q = QueryParser::parse(*Line, QS);
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Q->run(llvm::outs(), QS);
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llvm::outs().flush();
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if (QS.Terminate)
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break;
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}
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}
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return 0;
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}
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