Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/include/clang/Frontend/CommandLineSourceLoc.h
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//===--- CommandLineSourceLoc.h - Parsing for source locations-*- 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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//
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// Command line parsing for source locations.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_FRONTEND_COMMANDLINESOURCELOC_H
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#define LLVM_CLANG_FRONTEND_COMMANDLINESOURCELOC_H
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#include "clang/Basic/LLVM.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/raw_ostream.h"
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namespace clang {
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/// A source location that has been parsed on the command line.
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struct ParsedSourceLocation {
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  std::string FileName;
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  unsigned Line;
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  unsigned Column;
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public:
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  /// Construct a parsed source location from a string; the Filename is empty on
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  /// error.
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  static ParsedSourceLocation FromString(StringRef Str) {
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    ParsedSourceLocation PSL;
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    std::pair<StringRef, StringRef> ColSplit = Str.rsplit(':');
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    std::pair<StringRef, StringRef> LineSplit =
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      ColSplit.first.rsplit(':');
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    // If both tail splits were valid integers, return success.
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    if (!ColSplit.second.getAsInteger(10, PSL.Column) &&
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        !LineSplit.second.getAsInteger(10, PSL.Line)) {
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      PSL.FileName = LineSplit.first;
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      // On the command-line, stdin may be specified via "-". Inside the
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      // compiler, stdin is called "<stdin>".
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      if (PSL.FileName == "-")
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        PSL.FileName = "<stdin>";
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    }
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    return PSL;
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  }
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};
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/// A source range that has been parsed on the command line.
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struct ParsedSourceRange {
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  std::string FileName;
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  /// The starting location of the range. The first element is the line and
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  /// the second element is the column.
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  std::pair<unsigned, unsigned> Begin;
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  /// The ending location of the range. The first element is the line and the
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  /// second element is the column.
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  std::pair<unsigned, unsigned> End;
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  /// Returns a parsed source range from a string or None if the string is
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  /// invalid.
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  ///
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  /// These source string has the following format:
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  ///
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  /// file:start_line:start_column[-end_line:end_column]
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  ///
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  /// If the end line and column are omitted, the starting line and columns
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  /// are used as the end values.
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  static Optional<ParsedSourceRange> fromString(StringRef Str) {
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    std::pair<StringRef, StringRef> RangeSplit = Str.rsplit('-');
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    unsigned EndLine, EndColumn;
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    bool HasEndLoc = false;
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    if (!RangeSplit.second.empty()) {
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      std::pair<StringRef, StringRef> Split = RangeSplit.second.rsplit(':');
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      if (Split.first.getAsInteger(10, EndLine) ||
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          Split.second.getAsInteger(10, EndColumn)) {
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        // The string does not end in end_line:end_column, so the '-'
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        // probably belongs to the filename which menas the whole
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        // string should be parsed.
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        RangeSplit.first = Str;
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      } else
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        HasEndLoc = true;
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    }
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    auto Begin = ParsedSourceLocation::FromString(RangeSplit.first);
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    if (Begin.FileName.empty())
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      return None;
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    if (!HasEndLoc) {
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      EndLine = Begin.Line;
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      EndColumn = Begin.Column;
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    }
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    return ParsedSourceRange{std::move(Begin.FileName),
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                             {Begin.Line, Begin.Column},
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                             {EndLine, EndColumn}};
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  }
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};
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}
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namespace llvm {
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  namespace cl {
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    /// Command-line option parser that parses source locations.
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    ///
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    /// Source locations are of the form filename:line:column.
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    template<>
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    class parser<clang::ParsedSourceLocation> final
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      : public basic_parser<clang::ParsedSourceLocation> {
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    public:
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      inline bool parse(Option &O, StringRef ArgName, StringRef ArgValue,
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                 clang::ParsedSourceLocation &Val);
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    };
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    bool
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    parser<clang::ParsedSourceLocation>::
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    parse(Option &O, StringRef ArgName, StringRef ArgValue,
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          clang::ParsedSourceLocation &Val) {
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      using namespace clang;
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      Val = ParsedSourceLocation::FromString(ArgValue);
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      if (Val.FileName.empty()) {
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        errs() << "error: "
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               << "source location must be of the form filename:line:column\n";
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        return true;
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      }
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      return false;
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    }
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  }
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}
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#endif