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 20namespace llvm { 21 22/// Represents a location in source code. 23class SMLoc { 24 const char *Ptr; 25public: 26 SMLoc() : Ptr(0) {} 27 28 bool isValid() const { return Ptr != 0; } 29 30 bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; } 31 bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; } 32 33 const char *getPointer() const { return Ptr; } 34 35 static SMLoc getFromPointer(const char *Ptr) { 36 SMLoc L; 37 L.Ptr = Ptr; 38 return L; 39 } 40}; 41 42/// Represents a range in source code. 43/// 44/// SMRange is implemented using a half-open range, as is the convention in C++. 45/// In the string "abc", the range (1,3] represents the substring "bc", and the 46/// range (2,2] represents an empty range between the characters "b" and "c". 47class SMRange { 48public: 49 SMLoc Start, End; 50 51 SMRange() {} 52 SMRange(SMLoc St, SMLoc En) : Start(St), End(En) { 53 assert(Start.isValid() == End.isValid() && 54 "Start and end should either both be valid or both be invalid!"); 55 } 56 57 bool isValid() const { return Start.isValid(); } 58}; 59 60} // end namespace llvm 61 62#endif 63 64