diff options
Diffstat (limited to 'dhall/src/error/mod.rs')
| -rw-r--r-- | dhall/src/error/mod.rs | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/dhall/src/error/mod.rs b/dhall/src/error/mod.rs index 4d59cbb..e4baea0 100644 --- a/dhall/src/error/mod.rs +++ b/dhall/src/error/mod.rs @@ -111,9 +111,20 @@ impl std::fmt::Display for TypeError { v.span().error("Type error: Invalid function output") } NotAFunction(v) => v.span().error("Type error: Not a function"), - TypeMismatch(v, _, _) => v - .span() - .error("Type error: Wrong type of function argument"), + TypeMismatch(x, y, z) => { + x.span() + .error("Type error: Wrong type of function argument") + + "\n" + + &z.span().error(format!( + "This argument has type {:?}", + z.get_type().unwrap() + )) + + "\n" + + &y.span().error(format!( + "But the function expected an argument of type {:?}", + y + )) + } _ => "Type error: Unhandled error".to_string(), }; write!(f, "{}", msg) |