rawsql-ts
Version:
[beta]High-performance SQL parser and AST analyzer written in TypeScript. Provides fast parsing and advanced transformation capabilities.
30 lines • 1.39 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.UnaryExpressionParser = void 0;
const Lexeme_1 = require("../models/Lexeme");
const ValueComponent_1 = require("../models/ValueComponent");
const ValueParser_1 = require("./ValueParser");
class UnaryExpressionParser {
static parseFromLexeme(lexemes, index) {
let idx = index;
// Process unary operator
if (idx < lexemes.length && (lexemes[idx].type & Lexeme_1.TokenType.Operator)) {
const operator = lexemes[idx].value;
idx++;
// Treat the asterisk as an Identifier, not as a unary operator
if (operator === '*') {
const v = new ValueComponent_1.ColumnReference(null, '*');
return { value: v, newIndex: idx };
}
// Get the right-hand side value of the unary operator
const result = ValueParser_1.ValueParser.parseFromLexeme(lexemes, idx);
idx = result.newIndex;
// Create unary expression
const value = new ValueComponent_1.UnaryExpression(operator, result.value);
return { value, newIndex: idx };
}
throw new Error(`Invalid unary expression at index ${index}: ${lexemes[index].value}`);
}
}
exports.UnaryExpressionParser = UnaryExpressionParser;
//# sourceMappingURL=UnaryExpressionParser.js.map