46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#pragma once
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#include "../macro/class_copy_move.hpp"
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#include <expected>
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#include <vector>
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#include <string>
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#include <string_view>
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namespace yycc::carton::lexer61 {
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enum class LexerState { Space, Single, Double, Escape, Normal };
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// @brief Any error occurs when lexer working.
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enum class LexerError {
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UnexpectedEnd, ///< The end of command line is not expected.
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};
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template<typename T>
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using LexerResult = std::expected<T, LexerError>;
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class Lexer61 {
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public:
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Lexer61();
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~Lexer61();
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YYCC_DEFAULT_COPY_MOVE(Lexer61)
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public:
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LexerResult<std::vector<std::u8string>> lex(const std::u8string_view& cmd);
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private:
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void reset();
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void proc_space();
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void proc_single();
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void proc_double();
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void proc_escape();
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void proc_normal();
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std::vector<std::u8string> m_ArgsCollection; ///< Internal result holder.
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std::u8string m_CurrentArg; ///< Holding current building commandline argument.
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char8_t m_CurrentChar; ///< Holding current char analysing.
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LexerState m_State; ///< Recording current state.
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LexerState m_PrevState; ///< Recording previous state.
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};
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} // namespace yycc::carton::lexer61
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