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Do not mention missing PartialOrd impl when involving uncalled fns

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This commit is contained in:
Esteban Küber 2019-04-17 14:37:50 -07:00
parent 70f130954d
commit 8f77a035a4
4 changed files with 14 additions and 19 deletions
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11
src/librustc_typeck/check/op.rs
View File

@ -332,8 +332,9 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
op.node.as_str(),
lhs_ty);
let mut involves_fn = false;
if !lhs_expr.span.eq(&rhs_expr.span) {
self.add_type_neq_err_label(
involves_fn |= self.add_type_neq_err_label(
&mut err,
lhs_expr.span,
lhs_ty,
@ -341,7 +342,7 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
op,
is_assign
);
self.add_type_neq_err_label(
involves_fn |= self.add_type_neq_err_label(
&mut err,
rhs_expr.span,
rhs_ty,
@ -410,7 +411,7 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
"`{}` might need a bound for `{}`",
lhs_ty, missing_trait
));
} else if !suggested_deref {
} else if !suggested_deref && !involves_fn {
err.note(&format!(
"an implementation of `{}` might \
be missing for `{}`",
@ -437,7 +438,7 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
other_ty: Ty<'tcx>,
op: hir::BinOp,
is_assign: IsAssign,
) {
) -> bool {
err.span_label(span, ty.to_string());
if let FnDef(def_id, _) = ty.sty {
let source_map = self.tcx.sess.source_map();
@ -481,8 +482,10 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
variable_snippet,
applicability,
);
return true;
}
}
false
}
fn check_str_addition(

2
src/test/ui/fn/fn-compare-mismatch.stderr
View File

@ -5,8 +5,6 @@ LL | let x = f == g;
| - ^^ - fn() {main::g}
| |
| fn() {main::f}
|
= note: an implementation of `std::cmp::PartialEq` might be missing for `fn() {main::f}`
help: you might have forgotten to call this function
|
LL | let x = f() == g;

14
src/test/ui/issues/issue-59488.rs
View File

@ -10,17 +10,17 @@ fn bar(a: i64) -> i64 {
fn main() {
foo > 12;
//~^ ERROR 12:9: 12:10: binary operation `>` cannot be applied to type `fn() -> i32 {foo}` [E0369]
//~| ERROR 12:11: 12:13: mismatched types [E0308]
//~^ ERROR binary operation `>` cannot be applied to type `fn() -> i32 {foo}` [E0369]
//~| ERROR mismatched types [E0308]
bar > 13;
//~^ ERROR 16:9: 16:10: binary operation `>` cannot be applied to type `fn(i64) -> i64 {bar}` [E0369]
//~| ERROR 16:11: 16:13: mismatched types [E0308]
//~^ ERROR binary operation `>` cannot be applied to type `fn(i64) -> i64 {bar}` [E0369]
//~| ERROR mismatched types [E0308]
foo > foo;
//~^ ERROR 20:9: 20:10: binary operation `>` cannot be applied to type `fn() -> i32 {foo}` [E0369]
//~^ ERROR binary operation `>` cannot be applied to type `fn() -> i32 {foo}` [E0369]
foo > bar;
//~^ ERROR 23:9: 23:10: binary operation `>` cannot be applied to type `fn() -> i32 {foo}` [E0369]
//~| ERROR 23:11: 23:14: mismatched types [E0308]
//~^ ERROR binary operation `>` cannot be applied to type `fn() -> i32 {foo}` [E0369]
//~| ERROR mismatched types [E0308]
}

6
src/test/ui/issues/issue-59488.stderr
View File

@ -6,8 +6,6 @@ LL | foo > 12;
| |
| fn() -> i32 {foo}
| help: you might have forgotten to call this function: `foo()`
|
= note: an implementation of `std::cmp::PartialOrd` might be missing for `fn() -> i32 {foo}`
error[E0308]: mismatched types
--> $DIR/issue-59488.rs:12:11
@ -26,8 +24,6 @@ LL | bar > 13;
| |
| fn(i64) -> i64 {bar}
| help: you might have forgotten to call this function: `bar( /* arguments */ )`
|
= note: an implementation of `std::cmp::PartialOrd` might be missing for `fn(i64) -> i64 {bar}`
error[E0308]: mismatched types
--> $DIR/issue-59488.rs:16:11
@ -45,8 +41,6 @@ LL | foo > foo;
| --- ^ --- fn() -> i32 {foo}
| |
| fn() -> i32 {foo}
|
= note: an implementation of `std::cmp::PartialOrd` might be missing for `fn() -> i32 {foo}`
help: you might have forgotten to call this function
|
LL | foo() > foo;