84 lines
1.9 KiB
C++
84 lines
1.9 KiB
C++
#pragma once
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#include <string>
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#include <map>
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#include <vector>
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enum TokenType{
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OPEN_PAREN, CLOSE_PAREN, OPEN_BRACE, CLOSE_BRACE,
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COMMA, DOT, MINUS, PLUS, SEMICOLON, SLASH, STAR, PERCENT,
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BINARY_OP,
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BANG, BANG_EQUAL,
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EQUAL, DOUBLE_EQUAL,
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GREATER, GREATER_EQUAL,
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LESS, LESS_EQUAL,
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IDENTIFIER, STRING, NUMBER, BOOL,
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AND, OR, TRUE, FALSE, IF, ELSE, FUNCTION, FOR,
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WHILE, VAR, CLASS, SUPER, THIS, NONE, RETURN, PRINT,
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END_OF_FILE
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};
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inline std::string enum_mapping[] = {"OPEN_PAREN", "CLOSE_PAREN", "OPEN_BRACE", "CLOSE_BRACE",
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"COMMA", "DOT", "MINUS", "PLUS", "SEMICOLON", "SLASH", "STAR", "PERCENT",
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"BINARY_OP",
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"BANG", "BANG_EQUAL",
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"EQUAL", "DOUBLE_EQUAL",
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"GREATER", "GREATER_EQUAL",
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"LESS", "LESS_EQUAL",
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"IDENTIFIER", "STRING", "NUMBER", "BOOL",
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"AND", "OR", "TRUE", "FALSE", "IF", "ELSE", "FUNCTION", "FOR",
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"WHILE", "VAR", "CLASS", "SUPER", "THIS", "NONE", "RETURN", "PRINT",
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"END_OF_FILE"};
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const std::map<std::string, TokenType> KEYWORDS {
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{"and", AND},
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{"or", OR},
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{"true", TRUE},
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{"false", FALSE},
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{"if", IF},
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{"else", ELSE},
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{"func", FUNCTION},
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{"for", FOR},
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{"while", WHILE},
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{"var", VAR},
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{"class", CLASS},
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{"super", SUPER},
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{"this", THIS},
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{"none", NONE},
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{"return", RETURN},
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{"print", PRINT}
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};
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struct Token
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{
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TokenType type;
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std::string lexeme;
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//TODO Object literal;
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int line;
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};
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class Lexer{
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public:
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std::vector<Token> Tokenize(std::string source);
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private:
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int line;
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std::vector<char> src;
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private:
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bool matchOn(char expected);
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char peekNext();
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void advance(int by = 1);
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};
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