qurust 0.2.0

Collection of modules used for working with quantum programs and circuits
Documentation 
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//! Module `parser` enables us to parse QASM3 programs from string into IR.
//!
//! To learn about syntax of QASM3 programs, you can refer to the official
//! [QASM3 documentation](https://openqasm.com/versions/3.0/language/types.html) or
//! [QASM3 grammar files](https://github.com/openqasm/openqasm/tree/main/source/grammar).

mod antlr;
mod visitor;

use crate::qasm3::ir;
use antlr_rust::common_token_stream::CommonTokenStream;
use antlr_rust::input_stream::InputStream;
use antlr_rust::tree::ParseTreeVisitorCompat;

/// Parse QASM3 program from string into IR tree structure.
pub fn parse(input: &str) -> Result<ir::Program, String> {
    let input = InputStream::new(input);
    let mut _lexer = antlr::qasm3lexer::qasm3Lexer::new(input);
    let token_source = CommonTokenStream::new(_lexer);
    let mut parser = antlr::qasm3parser::qasm3::new(token_source);

    let root = parser.program().unwrap();

    let mut visitor = visitor::Visitor::new();
    Ok(visitor.visit(&*root).result())
}