fn verify_success(input: &str, expected: Vec<(TokenType, &str)>) {
        let rx = lex("verify_success", input);
        for er in expected.iter() {
            if let Ok(token) = rx.recv() {
                assert_eq!(token.typ, er.0);
                assert_eq!(token.val, er.1);
            } else {
                assert!(false, "ran out of tokens");
            }
        }
        // make sure we have reached the end of the results
        if let Ok(token) = rx.recv() {
            assert_eq!(token.typ, TokenType::EndOfFile);
        } else {
            assert!(false, "should have exhausted tokens");
        }
    }
/// `verify_success` lexes a program and verifies that the tokens
/// emitted match those in the vector of tuples.
`verify_success` lexes a program and verifies that the tokens
emitted match those in the vector of tuples.
` verify_success ` lexes a program and verifies that the tokens emitted match those in the vector of tuples .
fn verify_success(input: &str, expected: Vec<(TokenType, &str)>) {
        let rx = lex("verify_success", input);
        for er in expected.iter() {
            if let Ok(token) = rx.recv() {
                assert_eq!(token.typ, er.0);
                assert_eq!(token.val, er.1);
            } else {
                assert!(false, "ran out of tokens");
            }
        }
        // make sure we have reached the end of the results
        if let Ok(token) = rx.recv() {
            assert_eq!(token.typ, TokenType::EndOfFile);
        } else {
            assert!(false, "should have exhausted tokens");
        }
    }
fn verify_success ( input : & str , expected : Vec < ( TokenType , & str ) > ) { let rx = lex ( " " , input ) ; for er in expected . iter ( ) { if let Ok ( token ) = rx . recv ( ) { assert_eq ! ( token typ er 0 ) ; assert_eq ! ( token val er 1 ) ; } else { assert ! ( false " " ) ; } } // make sure we have reached the end of the results if let Ok ( token ) = rx . recv ( ) { assert_eq ! ( token typ TokenType EndOfFile ) ; } else { assert ! ( false " " ) ; } }
`verify_success` lexes a program and verifies that the tokens
emitted match those in the vector of tuples.
` verify_success ` lexes a program and verifies that the tokens emitted match those in the vector of tuples .
input
&str
expected
Vec<(TokenType, &str)>