1 //===- SMLoc.h - Source location for use with diagnostics -------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the SMLoc class. This class encapsulates a location in 11 // source code for use in diagnostics. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_SUPPORT_SMLOC_H 16 #define LLVM_SUPPORT_SMLOC_H 17 18 #include "llvm/ADT/None.h" 19 #include <cassert> 20 21 namespace llvm { 22 23 /// Represents a location in source code. 24 class SMLoc { 25 const char *Ptr = nullptr; 26 27 public: 28 SMLoc() = default; 29 30 bool isValid() const { return Ptr != nullptr; } 31 32 bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; } 33 bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; } 34 35 const char *getPointer() const { return Ptr; } 36 37 static SMLoc getFromPointer(const char *Ptr) { 38 SMLoc L; 39 L.Ptr = Ptr; 40 return L; 41 } 42 }; 43 44 /// Represents a range in source code. 45 /// 46 /// SMRange is implemented using a half-open range, as is the convention in C++. 47 /// In the string "abc", the range (1,3] represents the substring "bc", and the 48 /// range (2,2] represents an empty range between the characters "b" and "c". 49 class SMRange { 50 public: 51 SMLoc Start, End; 52 53 SMRange() = default; 54 SMRange(NoneType) {} 55 SMRange(SMLoc St, SMLoc En) : Start(St), End(En) { 56 assert(Start.isValid() == End.isValid() && 57 "Start and end should either both be valid or both be invalid!"); 58 } 59 60 bool isValid() const { return Start.isValid(); } 61 }; 62 63 } // end namespace llvm 64 65 #endif // LLVM_SUPPORT_SMLOC_H 66
