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 <cassert> 19 20 namespace llvm { 21 22 /// Represents a location in source code. 23 class SMLoc { 24 const char *Ptr; 25 26 public: 27 SMLoc() : Ptr(nullptr) {} 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() {} 53 SMRange(SMLoc St, SMLoc En) : Start(St), End(En) { 54 assert(Start.isValid() == End.isValid() && 55 "Start and end should either both be valid or both be invalid!"); 56 } 57 58 bool isValid() const { return Start.isValid(); } 59 }; 60 61 } // end namespace llvm 62 63 #endif 64
