diff options
Diffstat (limited to 'src/libsyntax')
| -rw-r--r-- | src/libsyntax/ext/expand.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs index 965d95789c4..0f2ad4cd54a 100644 --- a/src/libsyntax/ext/expand.rs +++ b/src/libsyntax/ext/expand.rs @@ -486,6 +486,42 @@ pub fn core_macros() -> ~str { ) ) + macro_rules! assert_approx_eq ( + ($given:expr , $expected:expr) => ( + { + use core::cmp::ApproxEq; + + let given_val = $given; + let expected_val = $expected; + // check both directions of equality.... + if !( + given_val.approx_eq(&expected_val) && + expected_val.approx_eq(&given_val) + ) { + fail!(\"left: %? does not approximately equal right: %?\", + given_val, expected_val); + } + } + ); + ($given:expr , $expected:expr , $epsilon:expr) => ( + { + use core::cmp::ApproxEq; + + let given_val = $given; + let expected_val = $expected; + let epsilon_val = $epsilon; + // check both directions of equality.... + if !( + given_val.approx_eq_eps(&expected_val, &epsilon_val) && + expected_val.approx_eq_eps(&given_val, &epsilon_val) + ) { + fail!(\"left: %? does not approximately equal right: %? with epsilon: %?\", + given_val, expected_val, epsilon_val); + } + } + ) + ) + macro_rules! condition ( { $c:ident: $in:ty -> $out:ty; } => { |