ruby-parser 0.0.0-dev1

A parser for the Ruby language
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/// Defines the functions used by the `assert_ok!`, `assert_partial!`, and `assert_err!` macros
#[macro_export]
macro_rules! use_parser {
    ($func:ident) => {
        #[allow(dead_code)]
        fn ident<T>(i: T) -> T {
            i
        }
        use_parser!($func, ident);
    };
    ($func:ident, $output:ident) => {
        use_parser!($func, $output, crate::Input, crate::ErrorKind);
    };
    ($func:ident, $output:ident, $input_type:ty, $err_type:ty) => {

        #[allow(unused_variables)]
        let mut parser = nom::combinator::all_consuming($func);
        #[allow(unused_variables)]
        let partial_parser = $func;

        /// Tests whether the parser's output matches a successful result for the entire input
        #[allow(unused_macros)]
        macro_rules! assert_ok {
            ($input:expr) => {
                let res = parser($input.into());
                if res.is_err() {
                    panic!("\nExpected parsing to succeed...\n     input: {:?}\n    result: {:?}\n  expected: Ok", $input, res.unwrap_err())
                }
            };
            ($input:expr, $result:expr) => {
                let res = parser($input.into());
                if res.is_ok() {
                    assert_eq!($output(parser($input.into()).unwrap().1), $result)
                } else {
                    panic!("\nExpected parsing to succeed...\n     input: {:?}\n    result: {:?}\n  expected: {:?}", $input, res.unwrap_err(), $result)
                }
            };
        };

        /// Tests whether the parser's output matches a successful result for part of the input
        #[allow(unused_macros)]
        macro_rules! assert_partial {
            ($input:expr) => {
                let res = partial_parser($input.into());
                if res.is_err() {
                    panic!("\nExpected parsing to succeed...\n     input: {:?}\n    result: {:?}\n  expected: Ok", $input, res.unwrap_err())
                }
            };
            ($input:expr, $result:expr) => {
                let res = partial_parser($input.into());
                if res.is_ok() {
                    assert_eq!($output(partial_parser($input.into()).unwrap().1), $result)
                } else {
                    panic!("\nExpected parsing to succeed...\n     input: {:?}\n    result: {:?}\n  expected: {:?}", $input, res.unwrap_err(), $result)
                }
            };
        };

        /// Tests whether the parser's output matches an unsuccessful result
        #[allow(unused_macros)]
        macro_rules! assert_err {
            ($input:expr) => {
                let res = parser($input.into());
                if res.is_ok() {
                    panic!(
                        "\nExpected parsing to fail...\n     input: {:?}\n    result: {:?}\n  expected: Err",
                        $input,
                        res.unwrap().1
                    );
                }
            };
            ($input:expr, $remaining:expr, $result:expr) => {
                assert_eq!(
                    parser($input.into()).unwrap_err(),
                    nom::Err::Error(($remaining.into(), $result))
                )
            };
        };

        #[allow(unused_macros)]
        macro_rules! parser {
            ($input:expr) => { parser($input.into()) }
        }

    };
}