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More and better debug messages for method typechecking

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This commit is contained in:
Lindsey Kuper 2012-08-17 11:34:25 -07:00
parent 6f441e8fde
commit 2b3c86cb02
1 changed files with 18 additions and 6 deletions
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24
src/rustc/middle/typeck/check/method.rs
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@ -174,7 +174,11 @@ struct lookup {
(optional_inherent_methods, subtyping_mode);
// if we found anything, stop before trying borrows
if self.candidates.len() > 0u { break; }
if self.candidates.len() > 0u {
debug!{"(checking method) found at least one inherent \
method; giving up looking now"};
break;
}
// Again, look for inherent and extension methods, this time using
// assignability.
@ -198,7 +202,11 @@ struct lookup {
(optional_inherent_methods, mutable_reference_mode);
// if we found anything, stop before attempting auto-deref.
if self.candidates.len() > 0u { break; }
if self.candidates.len() > 0u {
debug!{"(checking method) found at least one inherent \
method; giving up looking now"};
break;
}
// check whether we can autoderef and if so loop around again.
match ty::deref(self.tcx(), self.self_ty, false) {
@ -210,7 +218,11 @@ struct lookup {
}
}
if self.candidates.len() == 0u { return none; }
if self.candidates.len() == 0u {
debug!{"(checking method) couldn't find any candidate methods; \
returning none"};
return none;
}
if self.candidates.len() > 1u {
self.tcx().sess.span_err(
@ -270,7 +282,7 @@ struct lookup {
}
fn add_candidates_from_param(n: uint, did: ast::def_id) {
debug!{"candidates_from_param"};
debug!{"add_candidates_from_param"};
let tcx = self.tcx();
let mut trait_bnd_idx = 0u; // count only trait bounds
@ -320,7 +332,7 @@ struct lookup {
fn add_candidates_from_trait(did: ast::def_id, trait_substs: ty::substs) {
debug!{"method_from_trait"};
debug!{"add_candidates_from_trait"};
let ms = *ty::trait_methods(self.tcx(), did);
for ms.eachi |i, m| {
@ -355,7 +367,7 @@ struct lookup {
fn add_candidates_from_class(did: ast::def_id, class_substs: ty::substs) {
debug!{"method_from_class"};
debug!{"add_candidates_from_class"};
let ms = *ty::trait_methods(self.tcx(), did);