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//===- SMLoc.h - Source location for use with diagnostics -------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the SMLoc class. This class encapsulates a location in
// source code for use in diagnostics.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_SMLOC_H
#define LLVM_SUPPORT_SMLOC_H
#include "llvm/ADT/None.h"
#include <cassert>
namespace llvm {
/// Represents a location in source code.
class SMLoc {
const char *Ptr = nullptr;
public:
SMLoc() = default;
bool isValid() const { return Ptr != nullptr; }
bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; }
bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; }
const char *getPointer() const { return Ptr; }
static SMLoc getFromPointer(const char *Ptr) {
SMLoc L;
L.Ptr = Ptr;
return L;
}
};
/// Represents a range in source code.
///
/// SMRange is implemented using a half-open range, as is the convention in C++.
/// In the string "abc", the range [1,3) represents the substring "bc", and the
/// range [2,2) represents an empty range between the characters "b" and "c".
class SMRange {
public:
SMLoc Start, End;
SMRange() = default;
SMRange(NoneType) {}
SMRange(SMLoc St, SMLoc En) : Start(St), End(En) {
assert(Start.isValid() == End.isValid() &&
"Start and End should either both be valid or both be invalid!");
}
bool isValid() const { return Start.isValid(); }
};
} // end namespace llvm
#endif // LLVM_SUPPORT_SMLOC_H
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