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1
2//===--- CommandLineSourceLoc.h - Parsing for source locations-*- C++ -*---===//
3//
4// The LLVM Compiler Infrastructure
5//
6// This file is distributed under the University of Illinois Open Source
7// License. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10//
11// Command line parsing for source locations.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_FRONTEND_COMMANDLINESOURCELOC_H
16#define LLVM_CLANG_FRONTEND_COMMANDLINESOURCELOC_H
17
18#include "clang/Basic/LLVM.h"
19#include "llvm/Support/CommandLine.h"
20#include "llvm/Support/raw_ostream.h"
21
22namespace clang {
23
24/// A source location that has been parsed on the command line.
25struct ParsedSourceLocation {
26 std::string FileName;
27 unsigned Line;
28 unsigned Column;
29
30public:
31 /// Construct a parsed source location from a string; the Filename is empty on
32 /// error.
33 static ParsedSourceLocation FromString(StringRef Str) {
34 ParsedSourceLocation PSL;
35 std::pair<StringRef, StringRef> ColSplit = Str.rsplit(':');
36 std::pair<StringRef, StringRef> LineSplit =
37 ColSplit.first.rsplit(':');
38
39 // If both tail splits were valid integers, return success.
40 if (!ColSplit.second.getAsInteger(10, PSL.Column) &&
41 !LineSplit.second.getAsInteger(10, PSL.Line)) {
42 PSL.FileName = LineSplit.first;
43
44 // On the command-line, stdin may be specified via "-". Inside the
45 // compiler, stdin is called "<stdin>".
46 if (PSL.FileName == "-")
47 PSL.FileName = "<stdin>";
48 }
49
50 return PSL;
51 }
52};
53
54/// A source range that has been parsed on the command line.
55struct ParsedSourceRange {
56 std::string FileName;
57 /// The starting location of the range. The first element is the line and
58 /// the second element is the column.
59 std::pair<unsigned, unsigned> Begin;
60 /// The ending location of the range. The first element is the line and the
61 /// second element is the column.
62 std::pair<unsigned, unsigned> End;
63
64 /// Returns a parsed source range from a string or None if the string is
65 /// invalid.
66 ///
67 /// These source string has the following format:
68 ///
69 /// file:start_line:start_column[-end_line:end_column]
70 ///
71 /// If the end line and column are omitted, the starting line and columns
72 /// are used as the end values.
73 static Optional<ParsedSourceRange> fromString(StringRef Str) {
74 std::pair<StringRef, StringRef> RangeSplit = Str.rsplit('-');
75 unsigned EndLine, EndColumn;
76 bool HasEndLoc = false;
77 if (!RangeSplit.second.empty()) {
78 std::pair<StringRef, StringRef> Split = RangeSplit.second.rsplit(':');
79 if (Split.first.getAsInteger(10, EndLine) ||
80 Split.second.getAsInteger(10, EndColumn)) {
81 // The string does not end in end_line:end_column, so the '-'
82 // probably belongs to the filename which menas the whole
83 // string should be parsed.
84 RangeSplit.first = Str;
85 } else
86 HasEndLoc = true;
87 }
88 auto Begin = ParsedSourceLocation::FromString(RangeSplit.first);
89 if (Begin.FileName.empty())
90 return None;
91 if (!HasEndLoc) {
92 EndLine = Begin.Line;
93 EndColumn = Begin.Column;
94 }
95 return ParsedSourceRange{std::move(Begin.FileName),
96 {Begin.Line, Begin.Column},
97 {EndLine, EndColumn}};
98 }
99};
100}
101
102namespace llvm {
103 namespace cl {
104 /// Command-line option parser that parses source locations.
105 ///
106 /// Source locations are of the form filename:line:column.
107 template<>
108 class parser<clang::ParsedSourceLocation> final
109 : public basic_parser<clang::ParsedSourceLocation> {
110 public:
111 inline bool parse(Option &O, StringRef ArgName, StringRef ArgValue,
112 clang::ParsedSourceLocation &Val);
113 };
114
115 bool
116 parser<clang::ParsedSourceLocation>::
117 parse(Option &O, StringRef ArgName, StringRef ArgValue,
118 clang::ParsedSourceLocation &Val) {
119 using namespace clang;
120
121 Val = ParsedSourceLocation::FromString(ArgValue);
122 if (Val.FileName.empty()) {
123 errs() << "error: "
124 << "source location must be of the form filename:line:column\n";
125 return true;
126 }
127
128 return false;
129 }
130 }
131}
132
133#endif
134

Warning: That file was not part of the compilation database. It may have many parsing errors.