griffin-core 0.3.0

UTXO framework for Substrate and Polkadot.
Documentation 
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//! These macros were copied from `frame-support`.
//!
//! See discussion at <https://github.com/paritytech/substrate/issues/13456>
//! to explain the repetition.

/// Return Err of the expression: `return Err($expression);`.
///
/// Used as `fail!(expression)`.
#[macro_export]
macro_rules! fail {
    ( $y:expr ) => {{
        return Err($y.into());
    }};
}

/// Evaluate `$x:expr` and if not true return `Err($y:expr)`.
///
/// Used as `ensure!(expression_to_ensure, expression_to_return_on_false)`.
#[macro_export]
macro_rules! ensure {
    ( $x:expr, $y:expr $(,)? ) => {{
        if !$x {
            $crate::fail!($y);
        }
    }};
}