rawsql-ts
Version:
[beta]High-performance SQL parser and AST analyzer written in TypeScript. Provides fast parsing and advanced transformation capabilities.
35 lines • 1.19 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.SpecialSymbolTokenReader = void 0;
const BaseTokenReader_1 = require("./BaseTokenReader");
const Lexeme_1 = require("../models/Lexeme");
/**
* Reads SQL symbol tokens (., ,, (, ))
*/
class SpecialSymbolTokenReader extends BaseTokenReader_1.BaseTokenReader {
/**
* Try to read a symbol token
*/
tryRead(previous) {
if (this.isEndOfInput()) {
return null;
}
const char = this.input[this.position];
// symbol tokens
if (char in SpecialSymbolTokenReader.SPECIAL_SYMBOL_TOKENS) {
this.position++;
return this.createLexeme(SpecialSymbolTokenReader.SPECIAL_SYMBOL_TOKENS[char], char);
}
return null;
}
}
exports.SpecialSymbolTokenReader = SpecialSymbolTokenReader;
SpecialSymbolTokenReader.SPECIAL_SYMBOL_TOKENS = {
'.': Lexeme_1.TokenType.Dot,
',': Lexeme_1.TokenType.Comma,
'(': Lexeme_1.TokenType.OpenParen,
')': Lexeme_1.TokenType.CloseParen,
'[': Lexeme_1.TokenType.OpenBracket,
']': Lexeme_1.TokenType.CloseBracket,
};
//# sourceMappingURL=SymbolTokenReader.js.map