[gcc r14-7302] gccrs: Generic pointers are coerceable
Arthur Cohen
cohenarthur@gcc.gnu.org
Tue Jan 16 17:20:49 GMT 2024
https://gcc.gnu.org/g:24c4394cc4e3a5aa4f455763a92bd2e41412bebc
commit r14-7302-g24c4394cc4e3a5aa4f455763a92bd2e41412bebc
Author: Philip Herron <herron.philip@googlemail.com>
Date: Sun Feb 26 22:08:26 2023 +0000
gccrs: Generic pointers are coerceable
This is a complex type-system change where it begins out journey to get
rid of our can_eq interface. Rust allows:
let x:*mut T
let y = x as *mut u8;
Which requires us to consider find a way to infer what T should be so as
to keep unify happy. This means we need to introduce a new unify_and
interface where we can optionally inject inference variables as well as
only commit the inference variable joins when they are sucsessful.
So for this case we can then inject an implicit inference variables for T
that can unify against u8 to make this a valid type-resolution.
Fixes #1930
Signed-off-by: Philip Herron <herron.philip@googlemail.com>
gcc/rust/ChangeLog:
* backend/rust-compile-expr.cc (CompileExpr::resolve_method_address): update to new inteface
* typecheck/rust-coercion.cc (TypeCoercionRules::coerce_unsafe_ptr): likewise
(TypeCoercionRules::coerce_borrowed_pointer): likewise
* typecheck/rust-hir-type-check.h: likewise
* typecheck/rust-type-util.cc (unify_site_and): new interface to allow for infer and commit
* typecheck/rust-type-util.h (unify_site_and): likewise
* typecheck/rust-typecheck-context.cc (TypeCheckContext::clear_type): new interface
* typecheck/rust-unify.cc (UnifyRules::UnifyRules): update
(UnifyRules::Resolve): new optional flags for commit and infer
(UnifyRules::go): likewise
(UnifyRules::expect_adt): refactor to use new interface
(UnifyRules::expect_reference): likewise
(UnifyRules::expect_pointer): likewise
(UnifyRules::expect_array): likewise
(UnifyRules::expect_slice): likewise
(UnifyRules::expect_fndef): likewise
(UnifyRules::expect_fnptr): likewise
(UnifyRules::expect_tuple): likewise
(UnifyRules::expect_closure): likewise
* typecheck/rust-unify.h: refactor interface
gcc/testsuite/ChangeLog:
* rust/compile/issue-1930.rs: New test.
Diff:
---
gcc/rust/backend/rust-compile-expr.cc | 9 ++-
gcc/rust/typecheck/rust-coercion.cc | 25 ++++---
gcc/rust/typecheck/rust-hir-type-check.h | 1 +
gcc/rust/typecheck/rust-type-util.cc | 51 +++++++++++++-
gcc/rust/typecheck/rust-type-util.h | 7 +-
gcc/rust/typecheck/rust-typecheck-context.cc | 10 +++
gcc/rust/typecheck/rust-unify.cc | 99 +++++++++++++++++++---------
gcc/rust/typecheck/rust-unify.h | 25 ++++++-
gcc/testsuite/rust/compile/issue-1930.rs | 4 ++
9 files changed, 181 insertions(+), 50 deletions(-)
diff --git a/gcc/rust/backend/rust-compile-expr.cc b/gcc/rust/backend/rust-compile-expr.cc
index 731928af7a8..1a98f4ac98b 100644
--- a/gcc/rust/backend/rust-compile-expr.cc
+++ b/gcc/rust/backend/rust-compile-expr.cc
@@ -26,7 +26,7 @@
#include "rust-compile-block.h"
#include "rust-compile-implitem.h"
#include "rust-constexpr.h"
-#include "rust-unify.h"
+#include "rust-type-util.h"
#include "rust-gcc.h"
#include "fold-const.h"
@@ -2007,10 +2007,9 @@ CompileExpr::resolve_method_address (TyTy::FnType *fntype, HirId ref,
{
TyTy::BaseType *infer_impl_call
= candidate_call->infer_substitions (expr_locus);
- monomorphized = Resolver::UnifyRules::Resolve (
- TyTy::TyWithLocation (infer_impl_call),
- TyTy::TyWithLocation (fntype), expr_locus, true /* commit */,
- true /* emit_errors */);
+ monomorphized
+ = Resolver::unify_site (ref, TyTy::TyWithLocation (infer_impl_call),
+ TyTy::TyWithLocation (fntype), expr_locus);
}
return CompileInherentImplItem::Compile (impl_item, ctx, monomorphized);
diff --git a/gcc/rust/typecheck/rust-coercion.cc b/gcc/rust/typecheck/rust-coercion.cc
index 3a3f13a679c..24f60d84080 100644
--- a/gcc/rust/typecheck/rust-coercion.cc
+++ b/gcc/rust/typecheck/rust-coercion.cc
@@ -18,7 +18,7 @@
#include "rust-hir-type-check-base.h"
#include "rust-coercion.h"
-#include "rust-unify.h"
+#include "rust-type-util.h"
namespace Rust {
namespace Resolver {
@@ -146,7 +146,7 @@ TypeCoercionRules::coerce_unsafe_ptr (TyTy::BaseType *receiver,
TyTy::PointerType *expected,
Mutability to_mutbl)
{
- rust_debug ("coerce_unsafe_ptr(a={%s}, b={%s})",
+ rust_debug ("coerce_unsafe_ptr(receiver={%s}, expected={%s})",
receiver->debug_str ().c_str (), expected->debug_str ().c_str ());
Mutability from_mutbl = Mutability::Imm;
@@ -184,13 +184,21 @@ TypeCoercionRules::coerce_unsafe_ptr (TyTy::BaseType *receiver,
return TypeCoercionRules::CoercionResult::get_error ();
}
- TyTy::PointerType *result
+ TyTy::PointerType *coerced_mutability
= new TyTy::PointerType (receiver->get_ref (),
TyTy::TyVar (element->get_ref ()), to_mutbl);
- if (!result->can_eq (expected, false))
- return CoercionResult::get_error ();
- return CoercionResult{{}, result};
+ TyTy::BaseType *result
+ = unify_site_and (receiver->get_ref (), TyTy::TyWithLocation (expected),
+ TyTy::TyWithLocation (coerced_mutability),
+ Location () /*unify_locus*/, false /*emit_errors*/,
+ true /*commit_if_ok*/, true /*infer*/,
+ true /*cleanup on error*/);
+ bool unsafe_ptr_coerceion_ok = result->get_kind () != TyTy::TypeKind::ERROR;
+ if (unsafe_ptr_coerceion_ok)
+ return CoercionResult{{}, result};
+
+ return TypeCoercionRules::CoercionResult::get_error ();
}
/// Reborrows `&mut A` to `&mut B` and `&(mut) A` to `&B`.
@@ -220,9 +228,8 @@ TypeCoercionRules::coerce_borrowed_pointer (TyTy::BaseType *receiver,
// back to a final unity anyway
rust_debug ("coerce_borrowed_pointer -- unify");
TyTy::BaseType *result
- = UnifyRules::Resolve (TyTy::TyWithLocation (receiver),
- TyTy::TyWithLocation (expected), locus,
- true /* commit */, true /* emit_errors */);
+ = unify_site (receiver->get_ref (), TyTy::TyWithLocation (receiver),
+ TyTy::TyWithLocation (expected), locus);
return CoercionResult{{}, result};
}
}
diff --git a/gcc/rust/typecheck/rust-hir-type-check.h b/gcc/rust/typecheck/rust-hir-type-check.h
index 5fec7d53165..2cd58988a75 100644
--- a/gcc/rust/typecheck/rust-hir-type-check.h
+++ b/gcc/rust/typecheck/rust-hir-type-check.h
@@ -84,6 +84,7 @@ public:
TyTy::BaseType *type);
void insert_implicit_type (TyTy::BaseType *type);
bool lookup_type (HirId id, TyTy::BaseType **type) const;
+ void clear_type (TyTy::BaseType *ty);
void insert_implicit_type (HirId id, TyTy::BaseType *type);
diff --git a/gcc/rust/typecheck/rust-type-util.cc b/gcc/rust/typecheck/rust-type-util.cc
index 0c688351fe9..4d6b026c365 100644
--- a/gcc/rust/typecheck/rust-type-util.cc
+++ b/gcc/rust/typecheck/rust-type-util.cc
@@ -117,8 +117,57 @@ unify_site (HirId id, TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
rust_debug ("unify_site id={%u} expected={%s} expr={%s}", id,
expected->debug_str ().c_str (), expr->debug_str ().c_str ());
+ std::vector<UnifyRules::CommitSite> commits;
+ std::vector<UnifyRules::InferenceSite> infers;
return UnifyRules::Resolve (lhs, rhs, unify_locus, true /*commit*/,
- true /*emit_error*/);
+ true /*emit_error*/, false /*infer*/, commits,
+ infers);
+}
+
+TyTy::BaseType *
+unify_site_and (HirId id, TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
+ Location unify_locus, bool emit_errors, bool commit_if_ok,
+ bool implicit_infer_vars, bool cleanup)
+{
+ TypeCheckContext &context = *TypeCheckContext::get ();
+
+ TyTy::BaseType *expected = lhs.get_ty ();
+ TyTy::BaseType *expr = rhs.get_ty ();
+
+ rust_debug (
+ "unify_site_and commit %s infer %s id={%u} expected={%s} expr={%s}",
+ commit_if_ok ? "true" : "false", implicit_infer_vars ? "true" : "false", id,
+ expected->debug_str ().c_str (), expr->debug_str ().c_str ());
+
+ std::vector<UnifyRules::CommitSite> commits;
+ std::vector<UnifyRules::InferenceSite> infers;
+ TyTy::BaseType *result
+ = UnifyRules::Resolve (lhs, rhs, unify_locus, false /*commit inline*/,
+ emit_errors, implicit_infer_vars, commits, infers);
+ bool ok = result->get_kind () != TyTy::TypeKind::ERROR;
+ if (ok && commit_if_ok)
+ {
+ for (auto &c : commits)
+ {
+ UnifyRules::commit (c.lhs, c.rhs, c.resolved);
+ }
+ }
+ else if (cleanup)
+ {
+ // FIXME
+ // reset the get_next_hir_id
+
+ for (auto &i : infers)
+ {
+ i.param->set_ref (i.pref);
+ i.param->set_ty_ref (i.ptyref);
+
+ // remove the inference variable
+ context.clear_type (i.infer);
+ delete i.infer;
+ }
+ }
+ return result;
}
TyTy::BaseType *
diff --git a/gcc/rust/typecheck/rust-type-util.h b/gcc/rust/typecheck/rust-type-util.h
index 4fac34a45a2..d2523fc4420 100644
--- a/gcc/rust/typecheck/rust-type-util.h
+++ b/gcc/rust/typecheck/rust-type-util.h
@@ -30,13 +30,18 @@ class BaseType;
namespace Resolver {
-extern bool
+bool
query_type (HirId reference, TyTy::BaseType **result);
TyTy::BaseType *
unify_site (HirId id, TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
Location unify_locus);
+TyTy::BaseType *
+unify_site_and (HirId id, TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
+ Location unify_locus, bool emit_errors, bool commit_if_ok,
+ bool implicit_infer_vars, bool cleanup);
+
TyTy::BaseType *
coercion_site (HirId id, TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
Location coercion_locus);
diff --git a/gcc/rust/typecheck/rust-typecheck-context.cc b/gcc/rust/typecheck/rust-typecheck-context.cc
index 030c82630e2..04135e7115d 100644
--- a/gcc/rust/typecheck/rust-typecheck-context.cc
+++ b/gcc/rust/typecheck/rust-typecheck-context.cc
@@ -108,6 +108,16 @@ TypeCheckContext::lookup_type (HirId id, TyTy::BaseType **type) const
return true;
}
+void
+TypeCheckContext::clear_type (TyTy::BaseType *ty)
+{
+ auto it = resolved.find (ty->get_ref ());
+ if (it == resolved.end ())
+ return;
+
+ resolved.erase (it);
+}
+
void
TypeCheckContext::insert_type_by_node_id (NodeId ref, HirId id)
{
diff --git a/gcc/rust/typecheck/rust-unify.cc b/gcc/rust/typecheck/rust-unify.cc
index d2d8ef5ce64..4a9290c2737 100644
--- a/gcc/rust/typecheck/rust-unify.cc
+++ b/gcc/rust/typecheck/rust-unify.cc
@@ -22,19 +22,26 @@ namespace Rust {
namespace Resolver {
UnifyRules::UnifyRules (TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
- Location locus, bool commit_flag, bool emit_error)
+ Location locus, bool commit_flag, bool emit_error,
+ bool infer, std::vector<CommitSite> &commits,
+ std::vector<InferenceSite> &infers)
: lhs (lhs), rhs (rhs), locus (locus), commit_flag (commit_flag),
- emit_error (emit_error), mappings (*Analysis::Mappings::get ()),
+ emit_error (emit_error), infer_flag (infer), commits (commits),
+ infers (infers), mappings (*Analysis::Mappings::get ()),
context (*TypeCheckContext::get ())
{}
TyTy::BaseType *
UnifyRules::Resolve (TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
- Location locus, bool commit_flag, bool emit_error)
+ Location locus, bool commit_flag, bool emit_error,
+ bool infer, std::vector<CommitSite> &commits,
+ std::vector<InferenceSite> &infers)
{
- UnifyRules r (lhs, rhs, locus, commit_flag, emit_error);
- TyTy::BaseType *result = r.go ();
+ UnifyRules r (lhs, rhs, locus, commit_flag, emit_error, infer, commits,
+ infers);
+ TyTy::BaseType *result = r.go ();
+ commits.push_back ({lhs.get_ty (), rhs.get_ty (), result});
if (r.commit_flag)
UnifyRules::commit (lhs.get_ty (), rhs.get_ty (), result);
@@ -142,6 +149,28 @@ UnifyRules::go ()
}
}
+ // inject inference vars if required
+ bool got_param = rtype->get_kind () == TyTy::TypeKind::PARAM;
+ bool lhs_is_infer_var = ltype->get_kind () == TyTy::TypeKind::INFER;
+ bool expected_is_concrete = ltype->is_concrete () && !lhs_is_infer_var;
+ bool needs_infer = expected_is_concrete && got_param;
+ if (infer_flag && needs_infer)
+ {
+ TyTy::ParamType *p = static_cast<TyTy::ParamType *> (rtype);
+ TyTy::TyVar iv = TyTy::TyVar::get_implicit_infer_var (rhs.get_locus ());
+ rust_assert (iv.get_tyty ()->get_kind () == TyTy::TypeKind::INFER);
+ TyTy::InferType *i = static_cast<TyTy::InferType *> (iv.get_tyty ());
+
+ infers.push_back ({p->get_ref (), p->get_ty_ref (), p, i});
+
+ // FIXME
+ // this is hacky to set the implicit param lets make this a function
+ p->set_ty_ref (i->get_ref ());
+
+ // set the rtype now to the new inference var
+ rtype = i;
+ }
+
switch (ltype->get_kind ())
{
case TyTy::INFER:
@@ -367,7 +396,8 @@ UnifyRules::expect_adt (TyTy::ADTType *ltype, TyTy::BaseType *rtype)
= UnifyRules::Resolve (TyTy::TyWithLocation (this_field_ty),
TyTy::TyWithLocation (other_field_ty),
locus, commit_flag,
- false /* emit_error */);
+ false /* emit_error */, infer_flag,
+ commits, infers);
if (unified_ty->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -392,7 +422,8 @@ UnifyRules::expect_adt (TyTy::ADTType *ltype, TyTy::BaseType *rtype)
auto res
= UnifyRules::Resolve (TyTy::TyWithLocation (pa),
TyTy::TyWithLocation (pb), locus,
- commit_flag, false /* emit_error */);
+ commit_flag, false /* emit_error */,
+ infer_flag, commits, infers);
if (res->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -497,7 +528,8 @@ UnifyRules::expect_reference (TyTy::ReferenceType *ltype, TyTy::BaseType *rtype)
TyTy::BaseType *base_resolved
= UnifyRules::Resolve (TyTy::TyWithLocation (base_type),
TyTy::TyWithLocation (other_base_type), locus,
- commit_flag, false /* emit_error */);
+ commit_flag, false /* emit_error */,
+ infer_flag, commits, infers);
if (base_resolved->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -566,7 +598,8 @@ UnifyRules::expect_pointer (TyTy::PointerType *ltype, TyTy::BaseType *rtype)
TyTy::BaseType *base_resolved
= UnifyRules::Resolve (TyTy::TyWithLocation (base_type),
TyTy::TyWithLocation (other_base_type), locus,
- commit_flag, false /* emit_error */);
+ commit_flag, false /* emit_error */,
+ infer_flag, commits, infers);
if (base_resolved->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -693,7 +726,7 @@ UnifyRules::expect_array (TyTy::ArrayType *ltype, TyTy::BaseType *rtype)
TyTy::BaseType *element_unify = UnifyRules::Resolve (
TyTy::TyWithLocation (ltype->get_element_type ()),
TyTy::TyWithLocation (type.get_element_type ()), locus, commit_flag,
- false /* emit_error*/);
+ false /* emit_error*/, infer_flag, commits, infers);
if (element_unify->get_kind () != TyTy::TypeKind::ERROR)
{
@@ -752,7 +785,7 @@ UnifyRules::expect_slice (TyTy::SliceType *ltype, TyTy::BaseType *rtype)
TyTy::BaseType *element_unify = UnifyRules::Resolve (
TyTy::TyWithLocation (ltype->get_element_type ()),
TyTy::TyWithLocation (type.get_element_type ()), locus, commit_flag,
- false /* emit_error*/);
+ false /* emit_error*/, infer_flag, commits, infers);
if (element_unify->get_kind () != TyTy::TypeKind::ERROR)
{
@@ -820,18 +853,18 @@ UnifyRules::expect_fndef (TyTy::FnType *ltype, TyTy::BaseType *rtype)
auto unified_param
= UnifyRules::Resolve (TyTy::TyWithLocation (a),
TyTy::TyWithLocation (b), locus,
- commit_flag, false /* emit_errors */);
+ commit_flag, false /* emit_errors */,
+ infer_flag, commits, infers);
if (unified_param->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
}
}
- auto unified_return
- = UnifyRules::Resolve (TyTy::TyWithLocation (
- ltype->get_return_type ()),
- TyTy::TyWithLocation (type.get_return_type ()),
- locus, commit_flag, false /* emit_errors */);
+ auto unified_return = UnifyRules::Resolve (
+ TyTy::TyWithLocation (ltype->get_return_type ()),
+ TyTy::TyWithLocation (type.get_return_type ()), locus, commit_flag,
+ false /* emit_errors */, infer_flag, commits, infers);
if (unified_return->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -897,18 +930,18 @@ UnifyRules::expect_fnptr (TyTy::FnPtr *ltype, TyTy::BaseType *rtype)
auto unified_param
= UnifyRules::Resolve (TyTy::TyWithLocation (a),
TyTy::TyWithLocation (b), locus,
- commit_flag, false /* emit_errors */);
+ commit_flag, false /* emit_errors */,
+ infer_flag, commits, infers);
if (unified_param->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
}
}
- auto unified_return
- = UnifyRules::Resolve (TyTy::TyWithLocation (
- ltype->get_return_type ()),
- TyTy::TyWithLocation (type.get_return_type ()),
- locus, commit_flag, false /* emit_errors */);
+ auto unified_return = UnifyRules::Resolve (
+ TyTy::TyWithLocation (ltype->get_return_type ()),
+ TyTy::TyWithLocation (type.get_return_type ()), locus, commit_flag,
+ false /* emit_errors */, infer_flag, commits, infers);
if (unified_return->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -926,7 +959,8 @@ UnifyRules::expect_fnptr (TyTy::FnPtr *ltype, TyTy::BaseType *rtype)
auto unified_result
= UnifyRules::Resolve (TyTy::TyWithLocation (this_ret_type),
TyTy::TyWithLocation (other_ret_type), locus,
- commit_flag, false /*emit_errors*/);
+ commit_flag, false /*emit_errors*/, infer_flag,
+ commits, infers);
if (unified_result->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -945,7 +979,8 @@ UnifyRules::expect_fnptr (TyTy::FnPtr *ltype, TyTy::BaseType *rtype)
auto unified_param
= UnifyRules::Resolve (TyTy::TyWithLocation (this_param),
TyTy::TyWithLocation (other_param), locus,
- commit_flag, false /* emit_errors */);
+ commit_flag, false /* emit_errors */,
+ infer_flag, commits, infers);
if (unified_param->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -1012,7 +1047,8 @@ UnifyRules::expect_tuple (TyTy::TupleType *ltype, TyTy::BaseType *rtype)
TyTy::BaseType *unified_ty
= UnifyRules::Resolve (TyTy::TyWithLocation (bo),
TyTy::TyWithLocation (fo), locus,
- commit_flag, false /* emit_errors */);
+ commit_flag, false /* emit_errors */,
+ infer_flag, commits, infers);
if (unified_ty->get_kind () == TyTy::TypeKind::ERROR)
return new TyTy::ErrorType (0);
@@ -1604,11 +1640,10 @@ UnifyRules::expect_closure (TyTy::ClosureType *ltype, TyTy::BaseType *rtype)
return new TyTy::ErrorType (0);
}
- TyTy::BaseType *args_res
- = UnifyRules::Resolve (TyTy::TyWithLocation (
- <ype->get_parameters ()),
- TyTy::TyWithLocation (&type.get_parameters ()),
- locus, commit_flag, false /* emit_error */);
+ TyTy::BaseType *args_res = UnifyRules::Resolve (
+ TyTy::TyWithLocation (<ype->get_parameters ()),
+ TyTy::TyWithLocation (&type.get_parameters ()), locus, commit_flag,
+ false /* emit_error */, infer_flag, commits, infers);
if (args_res->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
@@ -1617,7 +1652,7 @@ UnifyRules::expect_closure (TyTy::ClosureType *ltype, TyTy::BaseType *rtype)
TyTy::BaseType *res = UnifyRules::Resolve (
TyTy::TyWithLocation (<ype->get_result_type ()),
TyTy::TyWithLocation (&type.get_result_type ()), locus, commit_flag,
- false /* emit_error */);
+ false /* emit_error */, infer_flag, commits, infers);
if (res == nullptr || res->get_kind () == TyTy::TypeKind::ERROR)
{
return new TyTy::ErrorType (0);
diff --git a/gcc/rust/typecheck/rust-unify.h b/gcc/rust/typecheck/rust-unify.h
index dcd15839d5b..fecb21ec1e7 100644
--- a/gcc/rust/typecheck/rust-unify.h
+++ b/gcc/rust/typecheck/rust-unify.h
@@ -28,9 +28,25 @@ namespace Resolver {
class UnifyRules
{
public:
+ struct InferenceSite
+ {
+ HirId pref;
+ HirId ptyref;
+ TyTy::ParamType *param;
+ TyTy::InferType *infer;
+ };
+ struct CommitSite
+ {
+ TyTy::BaseType *lhs;
+ TyTy::BaseType *rhs;
+ TyTy::BaseType *resolved;
+ };
+
static TyTy::BaseType *Resolve (TyTy::TyWithLocation lhs,
TyTy::TyWithLocation rhs, Location locus,
- bool commit_flag, bool emit_error);
+ bool commit_flag, bool emit_error, bool infer,
+ std::vector<CommitSite> &commits,
+ std::vector<InferenceSite> &infers);
static void commit (TyTy::BaseType *base, TyTy::BaseType *other,
TyTy::BaseType *resolved);
@@ -69,7 +85,9 @@ protected:
private:
UnifyRules (TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
- Location locus, bool commit_flag, bool emit_error);
+ Location locus, bool commit_flag, bool emit_error, bool infer,
+ std::vector<CommitSite> &commits,
+ std::vector<InferenceSite> &infers);
void emit_type_mismatch () const;
@@ -83,6 +101,9 @@ private:
Location locus;
bool commit_flag;
bool emit_error;
+ bool infer_flag;
+ std::vector<CommitSite> &commits;
+ std::vector<InferenceSite> &infers;
Analysis::Mappings &mappings;
TypeCheckContext &context;
diff --git a/gcc/testsuite/rust/compile/issue-1930.rs b/gcc/testsuite/rust/compile/issue-1930.rs
new file mode 100644
index 00000000000..ab30ccc7da4
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-1930.rs
@@ -0,0 +1,4 @@
+// { dg-options "-w" }
+fn test<T>(x: *mut T) {
+ let x = x as *mut u8;
+}
More information about the Gcc-cvs
mailing list