resolve_vars_with_obligations, as it now also resolves const variables.
target: Ty<'tcx>,
allow_two_phase: AllowTwoPhase,
) -> RelateResult<'tcx, Ty<'tcx>> {
- let source = self.resolve_type_vars_with_obligations(expr_ty);
+ let source = self.resolve_vars_with_obligations(expr_ty);
debug!("coercion::try({:?}: {:?} -> {:?})", expr, source, target);
let cause = self.cause(expr.span, ObligationCauseCode::ExprAssignable);
/// Same as `try_coerce()`, but without side-effects.
pub fn can_coerce(&self, expr_ty: Ty<'tcx>, target: Ty<'tcx>) -> bool {
- let source = self.resolve_type_vars_with_obligations(expr_ty);
+ let source = self.resolve_vars_with_obligations(expr_ty);
debug!("coercion::can({:?} -> {:?})", source, target);
let cause = self.cause(syntax_pos::DUMMY_SP, ObligationCauseCode::ExprAssignable);
-> RelateResult<'tcx, Ty<'tcx>>
where E: AsCoercionSite
{
- let prev_ty = self.resolve_type_vars_with_obligations(prev_ty);
- let new_ty = self.resolve_type_vars_with_obligations(new_ty);
+ let prev_ty = self.resolve_vars_with_obligations(prev_ty);
+ let new_ty = self.resolve_vars_with_obligations(new_ty);
debug!("coercion::try_find_coercion_lub({:?}, {:?})", prev_ty, new_ty);
// Special-case that coercion alone cannot handle:
err.span_label(return_sp, "expected because this return type...");
err.span_label( *sp, format!(
"...is found to be `{}` here",
- fcx.resolve_type_vars_with_obligations(expected),
+ fcx.resolve_vars_with_obligations(expected),
));
}
err
expected: Ty<'tcx>,
allow_two_phase: AllowTwoPhase)
-> (Ty<'tcx>, Option<DiagnosticBuilder<'tcx>>) {
- let expected = self.resolve_type_vars_with_obligations(expected);
+ let expected = self.resolve_vars_with_obligations(expected);
let e = match self.try_coerce(expr, checked_ty, expected, allow_two_phase) {
Ok(ty) => return (ty, None),
let expr = expr.peel_drop_temps();
let cause = self.misc(expr.span);
- let expr_ty = self.resolve_type_vars_with_obligations(checked_ty);
+ let expr_ty = self.resolve_vars_with_obligations(checked_ty);
let mut err = self.report_mismatched_types(&cause, expected, expr_ty, e);
if self.is_assign_to_bool(expr, expected) {
expr: &'tcx hir::Expr,
) -> Ty<'tcx> {
let flds = expected.only_has_type(self).and_then(|ty| {
- let ty = self.resolve_type_vars_with_obligations(ty);
+ let ty = self.resolve_vars_with_obligations(ty);
match ty.kind {
ty::Tuple(ref flds) => Some(&flds[..]),
_ => None
// This occurs for UFCS desugaring of `T::method`, where there is no
// receiver expression for the method call, and thus no autoderef.
if let SelfSource::QPath(_) = source {
- return is_local(self.resolve_type_vars_with_obligations(rcvr_ty));
+ return is_local(self.resolve_vars_with_obligations(rcvr_ty));
}
self.autoderef(span, rcvr_ty).any(|(ty, _)| is_local(ty))
self.cause(span, ObligationCauseCode::MiscObligation)
}
- /// Resolves type variables in `ty` if possible. Unlike the infcx
+ /// Resolves type and const variables in `ty` if possible. Unlike the infcx
/// version (resolve_vars_if_possible), this version will
/// also select obligations if it seems useful, in an effort
/// to get more type information.
- fn resolve_type_vars_with_obligations(&self, mut ty: Ty<'tcx>) -> Ty<'tcx> {
- debug!("resolve_type_vars_with_obligations(ty={:?})", ty);
+ fn resolve_vars_with_obligations(&self, mut ty: Ty<'tcx>) -> Ty<'tcx> {
+ debug!("resolve_vars_with_obligations(ty={:?})", ty);
// No Infer()? Nothing needs doing.
if !ty.has_infer_types() && !ty.has_infer_consts() {
- debug!("resolve_type_vars_with_obligations: ty={:?}", ty);
+ debug!("resolve_vars_with_obligations: ty={:?}", ty);
return ty;
}
// If `ty` is a type variable, see whether we already know what it is.
ty = self.resolve_vars_if_possible(&ty);
if !ty.has_infer_types() && !ty.has_infer_consts() {
- debug!("resolve_type_vars_with_obligations: ty={:?}", ty);
+ debug!("resolve_vars_with_obligations: ty={:?}", ty);
return ty;
}
self.select_obligations_where_possible(false, |_| {});
ty = self.resolve_vars_if_possible(&ty);
- debug!("resolve_type_vars_with_obligations: ty={:?}", ty);
+ debug!("resolve_vars_with_obligations: ty={:?}", ty);
ty
}
formal_ret: Ty<'tcx>,
formal_args: &[Ty<'tcx>])
-> Vec<Ty<'tcx>> {
- let formal_ret = self.resolve_type_vars_with_obligations(formal_ret);
+ let formal_ret = self.resolve_vars_with_obligations(formal_ret);
let ret_ty = match expected_ret.only_has_type(self) {
Some(ret) => ret,
None => return Vec::new()
err.span_suggestion(
span,
"try adding a return type",
- format!("-> {} ", self.resolve_type_vars_with_obligations(found)),
+ format!("-> {} ", self.resolve_vars_with_obligations(found)),
Applicability::MachineApplicable);
true
}
// If no resolution is possible, then an error is reported.
// Numeric inference variables may be left unresolved.
pub fn structurally_resolved_type(&self, sp: Span, ty: Ty<'tcx>) -> Ty<'tcx> {
- let ty = self.resolve_type_vars_with_obligations(ty);
+ let ty = self.resolve_vars_with_obligations(ty);
if !ty.is_ty_var() {
ty
} else {
self.check_expr_with_needs(lhs_expr, Needs::MutPlace)
}
};
- let lhs_ty = self.resolve_type_vars_with_obligations(lhs_ty);
+ let lhs_ty = self.resolve_vars_with_obligations(lhs_ty);
// N.B., as we have not yet type-checked the RHS, we don't have the
// type at hand. Make a variable to represent it. The whole reason
// see `NB` above
let rhs_ty = self.check_expr_coercable_to_type(rhs_expr, rhs_ty_var);
- let rhs_ty = self.resolve_type_vars_with_obligations(rhs_ty);
+ let rhs_ty = self.resolve_vars_with_obligations(rhs_ty);
let return_ty = match result {
Ok(method) => {
expected: Ty<'tcx>,
mut def_bm: BindingMode,
) -> (Ty<'tcx>, BindingMode) {
- let mut expected = self.resolve_type_vars_with_obligations(&expected);
+ let mut expected = self.resolve_vars_with_obligations(&expected);
// Peel off as many `&` or `&mut` from the scrutinee type as possible. For example,
// for `match &&&mut Some(5)` the loop runs three times, aborting when it reaches