rust/src/test/compile-fail/nested-ty-params.rs
Tim Chevalier 1a6d029b07 Emit a better error message for unbound type parameters in nested functions
This code was causing a bounds check failure:

fn hd[U](&vec[U] v) -> U {
  fn hd1(&vec[U] w) -> U {
    ret w.(0);
  }
  ret hd1(v);
}

because in hd1, U was being treated as if it referred to a type
parameter of hd1, rather than referring to the lexically enclosing binding
for U that's part of hd.

I'm actually not sure whether this is a legit program or not. But I wanted
to get rid of the bounds check error, so I assumed that program shouldn't
compile and made it a proper error message.
2011-06-21 17:58:49 -07:00

12 lines
316 B
Rust

// error-pattern:Unbound type parameter in callee
/* I'm actually not sure whether this should compile.
But having a nice error message seems better than
a bounds check failure (which is what was happening
before.) */
fn hd[U](&vec[U] v) -> U {
fn hd1(&vec[U] w) -> U {
ret w.(0);
}
ret hd1(v);
}