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d53a88d920
The tool is currently hard-coded to find functions in the SwiftUI library that take parameters of type `(...) -> T` where `T: View` but where the parameter isn't annotated with `@ViewBuilder`. The long-term vision here, of course, is that this reads and interprets a script file, but that's quite a bit more work (especially to generate a million bindings to the AST). In the meantime, I think having a functional harness that people familiar with the C++ API can easily hack on to make their own tools is still pretty useful. The harness does try to open a script file and lex the first token of it, because that's exactly as far as I got before deciding to hard-code the query I wanted. Since this input is otherwise ignored, you can just point the tool at any old `.swift` file (or just an empty file) and it'll be fine.
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
//===--- swift-ast-script.cpp ---------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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///
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/// This utility is a command line tool that searches Swift code for
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/// declarations matching the given requirements.
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///
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//===----------------------------------------------------------------------===//
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#include "swift/Frontend/Frontend.h"
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#include "swift/FrontendTool/FrontendTool.h"
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#include "swift/Basic/LLVMInitialize.h"
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#include "ASTScript.h"
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#include "ASTScriptConfiguration.h"
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using namespace swift;
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using namespace scripting;
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namespace {
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class Observer : public FrontendObserver {
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ArrayRef<const char *> Args;
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std::unique_ptr<ASTScriptConfiguration> Config;
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std::unique_ptr<ASTScript> Script;
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bool HadError = false;
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public:
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Observer(ArrayRef<const char *> args) : Args(args) {}
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void configuredCompiler(CompilerInstance &instance) override {
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Config = ASTScriptConfiguration::parse(instance, Args);
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if (!Config) return flagError();
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Script = ASTScript::parse(*Config);
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if (!Script) return flagError();
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}
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void performedSemanticAnalysis(CompilerInstance &instance) override {
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if (Script) {
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if (Script->execute())
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return flagError();
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}
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}
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bool hadError() const {
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return HadError;
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}
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private:
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void flagError() {
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HadError = true;
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}
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};
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}
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int main(int argc, const char *argv[]) {
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PROGRAM_START(argc, argv);
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// Look for the first "--" in the arguments.
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auto argBegin = argv + 1;
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auto argEnd = argv + argc;
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auto dashDash = std::find(argBegin, argEnd, StringRef("--"));
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if (dashDash == argEnd) {
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llvm::errs() << "error: missing '--' in arguments to separate "
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"script configuration from compiler arguments\n"
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"usage:\n"
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" swift-grep <script_file> -- <compiler flags>\n";
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return 1;
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}
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Observer observer(llvm::makeArrayRef(argBegin, dashDash));
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// Set up the frontend arguments.
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unsigned numFrontendArgs = argEnd - (dashDash + 1);
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SmallVector<const char *, 8> frontendArgs;
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frontendArgs.reserve(numFrontendArgs + 1);
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frontendArgs.append(dashDash + 1, argEnd);
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frontendArgs.push_back("-typecheck");
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int frontendResult =
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performFrontend(frontendArgs, argv[0], (void*) &main, &observer);
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return (observer.hadError() ? 1 : frontendResult);
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}
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