48 lines
993 B
C++
48 lines
993 B
C++
#ifndef FURAS_LEXER_HPP
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#define FURAS_LEXER_HPP
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#include "furas/token.hpp"
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#include "furlang/result.hpp"
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#include <cstddef>
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#include <string_view>
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namespace furas {
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struct lexer_location {
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std::string_view filename;
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std::size_t row, col;
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};
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struct lexer_error {
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enum type {
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EndOfFile = 0,
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UnknownCharacter,
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} type;
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lexer_location location;
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std::string message;
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};
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using token_r = furlang::result<token, lexer_error>;
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class lexer {
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public:
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lexer(std::string_view filename, std::string_view content)
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: m_filename(filename), m_content(content) {}
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token_r next_token();
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private:
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constexpr lexer_location location() const { return { m_filename, m_cursor - m_lineStart, m_column }; }
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private:
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std::string_view m_filename;
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std::string_view m_content;
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std::size_t m_cursor = 0;
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std::size_t m_lineStart = 0;
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std::size_t m_column = 0;
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};
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} // namespace furas
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#endif // FURAS_LEXER_HPP
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