119 lines
2.4 KiB
C++
119 lines
2.4 KiB
C++
//
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// Created by Administrator on 2021/5/1.
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//
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#ifndef SYNTAXPARSER_AUTOMATA_H
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#define SYNTAXPARSER_AUTOMATA_H
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#include <map>
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#include <utility>
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#include <vector>
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#include <string>
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#include <fstream>
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#include <codecvt>
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#include <sstream>
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class Automata {
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public:
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std::wifstream input;
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explicit Automata(const std::string& path) : input(path, std::ios::binary) {
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auto* codeCvtToUTF8= new std::codecvt_utf8<wchar_t>;
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input.imbue(std::locale(input.getloc(), codeCvtToUTF8));
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}
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~Automata() {
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input.close();
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}
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void parse() {
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while (!ifeof) {
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tokens.push_back(nextToken());
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}
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}
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void output();
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private:
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using TokenType = enum {
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/* Reserve Words */
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STRUCT, BOOLEAN, SHORT, LONG,
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DOUBLE, FLOAT,
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INT8, INT16, INT32, INT64,
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UINT8, UINT16, UINT32, UINT64,
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CHAR,
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UNSIGNED,
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/* Special Symbols */
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OPENING_BRACE, CLOSING_BRACE,
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SEMICOLON,
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LEFT_BRACKET, RIGHT_BRACKET,
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MULT, PLUS, SUB, TILDE, SLASH,
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PERCENT, LEFT_SHIFT, RIGHT_SHIFT, AND, INSERT,
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DELIMITER, COMMA,
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/* Multicharacter Tokens */
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ID, LETTER, DIGIT, UNDERLINE, T_TRUE, T_FALSE,
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INTEGER, INTEGER_TYPE_SUFFIX, STRING, T_BOOLEAN,
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/* None & Error & EOF */
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NONE, ERROR, T_EOF
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};
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using StateType = enum {
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START,
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S_LETTER, S_UNDERLINE, S_DIGIT,
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INT_0, INT_NOT_0, INT_TYPE_SUFFIX,
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STRING_START, STRING_END,
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S_SIGN,
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DONE,
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S_NONE
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};
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using ReservedWord = struct {
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std::wstring str;
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TokenType token;
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};
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struct TokenInfo {
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const int line;
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const TokenType token;
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const std::wstring str;
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const StateType state;
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TokenInfo(const int line, const TokenType token, std::wstring str, StateType state)
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: line(line), token(token), str(std::move(str)), state(state) {}
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};
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FILE* fp = nullptr;
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bool ifeof = false;
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std::vector<TokenInfo> tokens;
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int line = 1;
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const static std::vector<ReservedWord> reservedWords;
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const static std::map<TokenType, std::wstring> tokenTypeStrMap;
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const static std::map<StateType, std::wstring> stateTypeStrMap;
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wchar_t Automata::nextChar();
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void pushBackChar();
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TokenInfo nextToken();
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static TokenType reservedLookup(const std::wstring& s);
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};
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#endif //SYNTAXPARSER_AUTOMATA_H
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