Change the assert_eq message to be more verbose.

emberian · emberian · commit 8dc6445e38e1 · 2013-07-10T13:12:10.000-04:00
Closes #6221
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
@@ -531,7 +531,8 @@ pub fn core_macros() -> @str {
                 let expected_val = $expected;
                 // check both directions of equality....
                 if !((given_val == expected_val) && (expected_val == given_val)) {
-                    fail!(\"left: %? does not equal right: %?\", given_val, expected_val);
+                    fail!(\"assertion failed: `(left == right) && (right == \
+                    left)` (left: `%?`, right: `%?`)\", given_val, expected_val);
                 }
             }
         )

Original file line number	Diff line number	Diff line change
`@@ -531,7 +531,8 @@ pub fn core_macros() -> @str {`
`531`	`531`	`let expected_val = $expected;`
`532`	`532`	`// check both directions of equality....`
`533`	`533`	`if !((given_val == expected_val) && (expected_val == given_val)) {`
`534`		`- fail!(\"left: %? does not equal right: %?\", given_val, expected_val);`
	`534`	+ fail!(\"assertion failed: `(left == right) && (right == \
	`535`	+ left)` (left: `%?`, right: `%?`)\", given_val, expected_val);
`535`	`536`	`}`
`536`	`537`	`}`
`537`	`538`	`)`