Module qasm3/lexer

OpenQASM 3.0 Lexical Analyzer

This module implements the lexer for OpenQASM 3.0, which transforms source code into a stream of tokens. The lexer handles the significantly expanded syntax of OpenQASM 3.0, including classical programming constructs, control flow, and advanced quantum features.

Key features of the OpenQASM 3.0 lexer:

Extended token set: Classical types, control flow, functions
Complex operators: Compound assignment, bitwise operations
Advanced literals: Scientific notation, binary/hex/octal, durations
Gate modifiers: ctrl, negctrl, inv, pow with @ syntax
Unicode support: Mathematical constants (π, ℇ, τ)
Robust error handling: Detailed syntax error reporting

The lexer performs several validation passes:

Semicolon verification for statement termination
Comment handling (single-line // and multi-line /* */)
String literal parsing with multiple quote styles
Number format validation and conversion

Example: Basic lexing process

const lexer = new Lexer('qubit[2] q; h q[0];');
const tokens = lexer.lex();
// Returns: [
//   [Token.Id, 'qubit'], [Token.LSParen], [Token.NNInteger, 2],
//   [Token.RSParen], [Token.Id, 'q'], [Token.Semicolon], ...
// ]

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Module qasm3/lexer

Example: Basic lexing process

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