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 <cassert> 18 #include <optional> 19 20 namespace llvm { 21 22 /// Represents a location in source code. 23 class SMLoc { 24 const char *Ptr = nullptr; 25 26 public: 27 constexpr SMLoc() = default; 28 isValid()29 constexpr bool isValid() const { return Ptr != nullptr; } 30 31 constexpr bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; } 32 constexpr bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; } 33 getPointer()34 constexpr const char *getPointer() const { return Ptr; } 35 getFromPointer(const char * Ptr)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; SMRange(std::nullopt_t)53 SMRange(std::nullopt_t) {} SMRange(SMLoc St,SMLoc En)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 isValid()59 bool isValid() const { return Start.isValid(); } 60 }; 61 62 } // end namespace llvm 63 64 #endif // LLVM_SUPPORT_SMLOC_H 65