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librustc_typeck: give more information when supplied wrong number of … #29705

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Merged
merged 1 commit into from
Nov 10, 2015
Merged

librustc_typeck: give more information when supplied wrong number of … #29705

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3 changes: 2 additions & 1 deletion src/librustc_typeck/check/method/confirm.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -351,7 +351,8 @@ impl<'a,'tcx> ConfirmContext<'a,'tcx> {
method_types);
} else if num_supplied_types != num_method_types {
span_err!(self.tcx().sess, self.span, E0036,
"incorrect number of type parameters given for this method");
"incorrect number of type parameters given for this method: expected {}, found {}",
num_method_types, num_supplied_types);
final_substs.types.replace(
subst::FnSpace,
vec![self.tcx().types.err; num_method_types]);
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3 changes: 2 additions & 1 deletion src/test/compile-fail/trait-test-2.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,8 @@ impl bar for u32 { fn dup(&self) -> u32 { *self } fn blah<X>(&self) {} }

fn main() {
10.dup::<i32>(); //~ ERROR does not take type parameters
10.blah::<i32, i32>(); //~ ERROR incorrect number of type parameters
10.blah::<i32, i32>();
//~^ ERROR incorrect number of type parameters given for this method: expected 1, found 2
(box 10 as Box<bar>).dup();
//~^ ERROR E0038
//~| ERROR E0038
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