Module Lexing

Main lexer interface for tokenizing QASM code

The lexer is responsible for breaking down QASM source code into tokens that can be consumed by the parser. It supports both OpenQASM 2.0 and 3.0 syntax, with version-specific lexers handling the differences in token types and syntax rules.

The specific Lexer implementations can be found at:

Qasm3Lexer
Qasm2Lexer

Example: Token Flow

Source Code → Lexer → Tokens → Parser → AST
"h q[0];"  →  [Id, Id, LSParen, NNInteger, RSParen, Semicolon]

Example: Basic lexing workflow

import { lex } from './lexer';

const qasmCode = 'OPENQASM 3.0; qubit q; h q;';
const tokens = lex(qasmCode);
console.log(tokens);
// [
//   [Token.OpenQASM, undefined],
//   [Token.Id, 'qubit'],
//   [Token.Id, 'q'],
//   [Token.Semicolon, undefined],
//   [Token.Id, 'h'],
//   [Token.Id, 'q'],
//   [Token.Semicolon, undefined]
// ]

Lexing

lex

Module Lexing

Example: Token Flow

Example: Basic lexing workflow

Lexing

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