rawsql-ts
Version:
[beta]High-performance SQL parser and AST analyzer written in TypeScript. Provides fast parsing and advanced transformation capabilities.
34 lines • 1.37 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.IdentifierTokenReader = void 0;
const BaseTokenReader_1 = require("./BaseTokenReader");
const Lexeme_1 = require("../models/Lexeme");
const stringUtils_1 = require("../utils/stringUtils");
/**
* Reads SQL identifier tokens
*/
class IdentifierTokenReader extends BaseTokenReader_1.BaseTokenReader {
/**
* Try to read an identifier token
*/
tryRead(previous) {
if (this.isEndOfInput()) {
return null;
}
const char = this.input[this.position];
// wildcard identifier
if (char === '*') {
// Assume that the OperatorTokenReader is executed before the IdentifierTokenReader.
// Since we have determined that the OperatorTokenReader is not an Operator,
// we treat '*' here as a wildcard identifier.
this.position++;
return this.createLexeme(Lexeme_1.TokenType.Identifier, char);
}
// Regular identifier
const result = stringUtils_1.StringUtils.readRegularIdentifier(this.input, this.position);
this.position = result.newPosition;
return this.createLexeme(Lexeme_1.TokenType.Identifier, result.identifier);
}
}
exports.IdentifierTokenReader = IdentifierTokenReader;
//# sourceMappingURL=IdentifierTokenReader.js.map