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//===--- Token.cpp - Tokens and token streams in the pseudoparser ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang-pseudo/Token.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormatVariadic.h"
namespace clang {
namespace pseudo {
llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const Token &T) {
OS << llvm::formatv("{0} {1}:{2} ", clang::tok::getTokenName(T.Kind), T.Line,
T.Indent);
OS << '"';
llvm::printEscapedString(T.text(), OS);
OS << '"';
if (T.Flags)
OS << llvm::format(" flags=%x", T.Flags);
return OS;
}
llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const TokenStream &TS) {
OS << "Index Kind Line Text\n";
for (const auto &T : TS.tokens()) {
OS << llvm::format("%5d: %16s %4d:%-2d ", TS.index(T),
clang::tok::getTokenName(T.Kind), T.Line, T.Indent);
OS << '"';
llvm::printEscapedString(T.text(), OS);
OS << '"';
if (T.Flags)
OS << llvm::format(" flags=%x", T.Flags);
OS << '\n';
}
return OS;
}
llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const Token::Range &R) {
OS << llvm::formatv("[{0},{1})", R.Begin, R.End);
return OS;
}
TokenStream::TokenStream(std::shared_ptr<void> Payload)
: Payload(std::move(Payload)) {
Storage.emplace_back();
Storage.back().Kind = clang::tok::eof;
}
void TokenStream::finalize() {
assert(!isFinalized());
unsigned LastLine = Storage.back().Line;
Storage.emplace_back();
Storage.back().Kind = tok::eof;
Storage.back().Line = LastLine + 1;
Tokens = Storage;
Tokens = Tokens.drop_front().drop_back();
}
bool TokenStream::isFinalized() const {
assert(!Storage.empty() && Storage.front().Kind == tok::eof);
if (Storage.size() == 1)
return false;
return Storage.back().Kind == tok::eof;
}
void TokenStream::print(llvm::raw_ostream &OS) const {
bool FirstToken = true;
unsigned LastLine = -1;
StringRef LastText;
for (const auto &T : tokens()) {
StringRef Text = T.text();
if (FirstToken) {
FirstToken = false;
} else if (T.Line == LastLine) {
if (LastText.data() + LastText.size() != Text.data())
OS << ' ';
} else {
OS << '\n';
OS.indent(T.Indent);
}
OS << Text;
LastLine = T.Line;
LastText = Text;
}
if (!FirstToken)
OS << '\n';
}
clang::LangOptions genericLangOpts(clang::Language Lang,
clang::LangStandard::Kind Standard) {
clang::LangOptions Opts;
std::vector<std::string> UnusedIncludes;
LangOptions::setLangDefaults(Opts, Lang, llvm::Triple(), UnusedIncludes,
Standard);
// Some options are "on by default", but e.g. at the driver level.
if (Opts.CPlusPlus)
Opts.CXXOperatorNames = true;
if (Opts.CPlusPlus20)
Opts.Coroutines = true;
// Some options are off by default, but define keywords we want to tolerate.
if (Opts.CPlusPlus)
Opts.MicrosoftExt = true; // kw__try, kw__finally
Opts.DeclSpecKeyword = true; // __declspec
Opts.WChar = true;
return Opts;
}
TokenStream stripComments(const TokenStream &Input) {
TokenStream Out(Input.getPayload());
for (const Token &T : Input.tokens()) {
if (T.Kind == tok::comment)
continue;
Out.push(T);
}
Out.finalize();
return Out;
}
} // namespace pseudo
} // namespace clang
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