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Split out the error reporting logic into a separate function

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This commit is contained in:
Oli Scherer 2022-09-29 14:29:36 +00:00
parent c5bbf36a31
commit aa3fbf8795
1 changed files with 140 additions and 134 deletions
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106
compiler/rustc_hir_analysis/src/check/callee.rs
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@ -394,6 +394,60 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
}
ty::FnPtr(sig) => (sig, None),
_ => {
self.report_invalid_callee(call_expr, callee_expr, callee_ty, arg_exprs);
// This is the "default" function signature, used in case of error.
// In that case, we check each argument against "error" in order to
// set up all the node type bindings.
(
ty::Binder::dummy(self.tcx.mk_fn_sig(
self.err_args(arg_exprs.len()).into_iter(),
self.tcx.ty_error(),
false,
hir::Unsafety::Normal,
abi::Abi::Rust,
)),
None,
)
}
};
// Replace any late-bound regions that appear in the function
// signature with region variables. We also have to
// renormalize the associated types at this point, since they
// previously appeared within a `Binder<>` and hence would not
// have been normalized before.
let fn_sig = self.replace_bound_vars_with_fresh_vars(call_expr.span, infer::FnCall, fn_sig);
let fn_sig = self.normalize_associated_types_in(call_expr.span, fn_sig);
// Call the generic checker.
let expected_arg_tys = self.expected_inputs_for_expected_output(
call_expr.span,
expected,
fn_sig.output(),
fn_sig.inputs(),
);
self.check_argument_types(
call_expr.span,
call_expr,
fn_sig.inputs(),
expected_arg_tys,
arg_exprs,
fn_sig.c_variadic,
TupleArgumentsFlag::DontTupleArguments,
def_id,
);
fn_sig.output()
}
fn report_invalid_callee(
&self,
call_expr: &'tcx hir::Expr<'tcx>,
callee_expr: &'tcx hir::Expr<'tcx>,
callee_ty: Ty<'tcx>,
arg_exprs: &'tcx [hir::Expr<'tcx>],
) {
let mut unit_variant = None;
if let hir::ExprKind::Path(qpath) = &callee_expr.kind
&& let Res::Def(def::DefKind::Ctor(kind, def::CtorKind::Const), _)
@ -451,8 +505,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// If the call spans more than one line and the callee kind is
// itself another `ExprCall`, that's a clue that we might just be
// missing a semicolon (Issue #51055)
let call_is_multiline =
self.tcx.sess.source_map().is_multiline(call_expr.span);
let call_is_multiline = self.tcx.sess.source_map().is_multiline(call_expr.span);
if call_is_multiline {
err.span_suggestion(
callee_expr.span.shrink_to_hi(),
@ -514,10 +567,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
callee_ty
)),
Res::Def(kind, def_id) if kind.ns() == Some(Namespace::ValueNS) => {
Some(format!(
"`{}` defined here",
self.tcx.def_path_str(def_id),
))
Some(format!("`{}` defined here", self.tcx.def_path_str(def_id),))
}
_ => Some(format!("`{callee_ty}` defined here")),
}
@ -528,50 +578,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
}
}
err.emit();
// This is the "default" function signature, used in case of error.
// In that case, we check each argument against "error" in order to
// set up all the node type bindings.
(
ty::Binder::dummy(self.tcx.mk_fn_sig(
self.err_args(arg_exprs.len()).into_iter(),
self.tcx.ty_error(),
false,
hir::Unsafety::Normal,
abi::Abi::Rust,
)),
None,
)
}
};
// Replace any late-bound regions that appear in the function
// signature with region variables. We also have to
// renormalize the associated types at this point, since they
// previously appeared within a `Binder<>` and hence would not
// have been normalized before.
let fn_sig = self.replace_bound_vars_with_fresh_vars(call_expr.span, infer::FnCall, fn_sig);
let fn_sig = self.normalize_associated_types_in(call_expr.span, fn_sig);
// Call the generic checker.
let expected_arg_tys = self.expected_inputs_for_expected_output(
call_expr.span,
expected,
fn_sig.output(),
fn_sig.inputs(),
);
self.check_argument_types(
call_expr.span,
call_expr,
fn_sig.inputs(),
expected_arg_tys,
arg_exprs,
fn_sig.c_variadic,
TupleArgumentsFlag::DontTupleArguments,
def_id,
);
fn_sig.output()
}
fn confirm_deferred_closure_call(