Compiling a Q# Subset to QASM 3.0 in TypeScript via a JSON Based IR

Abstract: We implement a compile toolchain from Q# to QASM 3.0 including a full-featured lexer and parser implementation, as well as a compiler that supports a subset of Q# features. The lexer, parser and compiler are shown to work with various input Q# programs and the implementation is compared against existing Q# compile tools. Unlike the Microsoft implementation of the official Q# compile toolchain, our implementation is written in TypeScript in order to port functionality to web environments.