LLVM  10.0.0svn
SMLoc.h
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1 //===- SMLoc.h - Source location for use with diagnostics -------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file declares the SMLoc class. This class encapsulates a location in
10 // source code for use in diagnostics.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_SUPPORT_SMLOC_H
15 #define LLVM_SUPPORT_SMLOC_H
16 
17 #include "llvm/ADT/None.h"
18 #include <cassert>
19 
20 namespace llvm {
21 
22 /// Represents a location in source code.
23 class SMLoc {
24  const char *Ptr = nullptr;
25 
26 public:
27  SMLoc() = default;
28 
29  bool isValid() const { return Ptr != nullptr; }
30 
31  bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; }
32  bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; }
33 
34  const char *getPointer() const { return Ptr; }
35 
36  static SMLoc getFromPointer(const char *Ptr) {
37  SMLoc L;
38  L.Ptr = Ptr;
39  return L;
40  }
41 };
42 
43 /// Represents a range in source code.
44 ///
45 /// SMRange is implemented using a half-open range, as is the convention in C++.
46 /// In the string "abc", the range [1,3) represents the substring "bc", and the
47 /// range [2,2) represents an empty range between the characters "b" and "c".
48 class SMRange {
49 public:
50  SMLoc Start, End;
51 
52  SMRange() = default;
54  SMRange(SMLoc St, SMLoc En) : Start(St), End(En) {
55  assert(Start.isValid() == End.isValid() &&
56  "Start and End should either both be valid or both be invalid!");
57  }
58 
59  bool isValid() const { return Start.isValid(); }
60 };
61 
62 } // end namespace llvm
63 
64 #endif // LLVM_SUPPORT_SMLOC_H
Represents a range in source code.
Definition: SMLoc.h:48
This class represents lattice values for constants.
Definition: AllocatorList.h:23
NoneType
A simple null object to allow implicit construction of Optional<T> and similar types without having t...
Definition: None.h:22
bool operator!=(const SMLoc &RHS) const
Definition: SMLoc.h:32
SMLoc Start
Definition: SMLoc.h:50
bool operator==(const SMLoc &RHS) const
Definition: SMLoc.h:31
const char * getPointer() const
Definition: SMLoc.h:34
SMRange(NoneType)
Definition: SMLoc.h:53
bool isValid() const
Definition: SMLoc.h:59
SMRange(SMLoc St, SMLoc En)
Definition: SMLoc.h:54
bool isValid() const
Definition: SMLoc.h:29
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:36
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
SMLoc()=default
Represents a location in source code.
Definition: SMLoc.h:23