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; 25 26public: 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". 48class SMRange { 49public: 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