76 lines
2 KiB
C++
76 lines
2 KiB
C++
#ifndef FORTRAN_POSITION_H_
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#define FORTRAN_POSITION_H_
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// Represents a position in a source file.
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// TODO: Support multiple source files for inclusion and support contextual
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// positions for macro expansions.
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#include <ostream>
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namespace Fortran {
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class Position {
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public:
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constexpr Position() {}
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constexpr Position(const Position &) = default;
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constexpr Position(Position &&) = default;
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constexpr Position(int ln, int col) : lineNumber_{ln}, column_{col} {}
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constexpr Position &operator=(const Position &) = default;
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constexpr Position &operator=(Position &&) = default;
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constexpr int lineNumber() const { return lineNumber_; }
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constexpr int column() const { return column_; }
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Position &set_lineNumber(int line) { lineNumber_ = line; return *this; }
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Position &set_column(int column) { column_ = column; return *this; }
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constexpr bool operator<(const Position &that) const {
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return lineNumber_ < that.lineNumber_ ||
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(lineNumber_ == that.lineNumber_ &&
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column_ < that.column_);
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}
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constexpr bool operator<=(const Position &that) const {
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return lineNumber_ < that.lineNumber_ ||
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(lineNumber_ == that.lineNumber_ &&
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column_ <= that.column_);
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}
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constexpr bool operator==(const Position &that) const {
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return lineNumber_ == that.lineNumber_ &&
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column_ == that.column_;
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}
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constexpr bool operator!=(const Position &that) const {
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return !operator==(that);
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}
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constexpr bool operator>(const Position &that) const {
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return !operator<=(that);
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}
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constexpr bool operator>=(const Position &that) const {
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return !operator<(that);
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}
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void AdvanceColumn() {
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++column_;
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}
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void TabAdvanceColumn() {
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column_ = ((column_ + 7) & -8) + 1;
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}
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void AdvanceLine() {
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++lineNumber_;
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column_ = 1;
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}
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private:
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int lineNumber_{1};
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int column_{1};
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};
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std::ostream &operator<<(std::ostream &, const Position &);
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} // namespace Fortran
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#endif // FORTRAN_POSITION_H_
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