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improve error reporting by mismatch! macro

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This commit is contained in:
Folkert 2020-03-13 13:05:47 +01:00
parent a7af366c3a
commit e01a6bab9b
1 changed files with 46 additions and 7 deletions
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53
compiler/unify/src/unify.rs
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@ -19,6 +19,45 @@ macro_rules! mismatch {
}
vec![Mismatch::TypeMismatch]
}};
($msg:expr) => {{
if cfg!(debug_assertions) {
println!(
"Mismatch in {} Line {} Column {}",
file!(),
line!(),
column!()
);
}
println!($msg);
println!("");
vec![Mismatch::TypeMismatch]
}};
($msg:expr,) => {{
if cfg!(debug_assertions) {
println!(
"Mismatch in {} Line {} Column {}",
file!(),
line!(),
column!()
);
}
println!($msg);
println!("");
vec![Mismatch::TypeMismatch]
}};
($msg:expr, $($arg:tt)*) => {{
if cfg!(debug_assertions) {
println!(
"Mismatch in {} Line {} Column {}",
file!(),
line!(),
column!()
);
}
println!($msg, $($arg)*);
println!("");
vec![Mismatch::TypeMismatch]
}};
}
type Pool = Vec<Variable>;
@ -154,9 +193,9 @@ fn unify_structure(
}
}
}
RigidVar(_) => {
RigidVar(name) => {
// Type mismatch! Rigid can only unify with flex.
mismatch!()
mismatch!("trying to unify {:?} with rigid var {:?}", &flat_type, name)
}
Structure(ref other_flat_type) => {
@ -552,11 +591,11 @@ fn unify_flat_type(
problems
}
}
(_other1, _other2) => {
// Can't unify other1 and other2
// dbg!(&_other1, &_other2);
mismatch!()
}
(other1, other2) => mismatch!(
"Trying to two flat types that are incompatible: {:?} ~ {:?}",
other1,
other2
),
}
}