hokein created this revision.
hokein added a reviewer: sammccall.
Herald added a project: clang.
We mark these decls as invalid.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D77037
Files:
clang/include/clang/AST/DependenceFlags.h
clang/include/clang/AST/Type.h
clang/lib/Parse/ParseExprCXX.cpp
clang/lib/Sema/SemaType.cpp
clang/test/AST/ast-dump-expr-errors.cpp
clang/test/Sema/invalid-member.cpp
Index: clang/test/Sema/invalid-member.cpp
===================================================================
--- clang/test/Sema/invalid-member.cpp
+++ clang/test/Sema/invalid-member.cpp
@@ -1,7 +1,15 @@
// RUN: %clang_cc1 -verify -fsyntax-only %s
-void foo(); // expected-note {{requires 0 arguments}}
+// RUN: %clang_cc1 -verify -fsyntax-only -frecovery-ast %s
+
+void foo(); // expected-note 2{{requires 0 arguments}}
class X {
decltype(foo(42)) invalid; // expected-error {{no matching function}}
};
// Should be able to evaluate sizeof without crashing.
static_assert(sizeof(X) == 1, "No valid members");
+
+class Y {
+ typeof(foo(42)) invalid; // expected-error {{no matching function}}
+};
+// Should be able to evaluate sizeof without crashing.
+static_assert(sizeof(Y) == 1, "No valid members");
Index: clang/test/AST/ast-dump-expr-errors.cpp
===================================================================
--- clang/test/AST/ast-dump-expr-errors.cpp
+++ clang/test/AST/ast-dump-expr-errors.cpp
@@ -42,5 +42,9 @@
// FIXME: store initializer even when 'auto' could not be deduced.
// Expressions with errors currently do not keep initializers around.
-// CHECK: `-VarDecl {{.*}} invalid e 'auto'
+// CHECK: -VarDecl {{.*}} invalid e 'auto'
auto e = bar();
+
+// Error type should result in an invalid decl.
+// CHECK: -VarDecl {{.*}} invalid f
+decltype(bar()) f;
\ No newline at end of file
Index: clang/lib/Sema/SemaType.cpp
===================================================================
--- clang/lib/Sema/SemaType.cpp
+++ clang/lib/Sema/SemaType.cpp
@@ -1587,7 +1587,7 @@
assert(E && "Didn't get an expression for typeof?");
// TypeQuals handled by caller.
Result = S.BuildTypeofExprType(E, DS.getTypeSpecTypeLoc());
- if (Result.isNull()) {
+ if (Result.isNull() || Result->isErrorType()) {
Result = Context.IntTy;
declarator.setInvalidType(true);
}
@@ -1598,7 +1598,7 @@
assert(E && "Didn't get an expression for decltype?");
// TypeQuals handled by caller.
Result = S.BuildDecltypeType(E, DS.getTypeSpecTypeLoc());
- if (Result.isNull()) {
+ if (Result.isNull() || Result->isErrorType()) {
Result = Context.IntTy;
declarator.setInvalidType(true);
}
Index: clang/lib/Parse/ParseExprCXX.cpp
===================================================================
--- clang/lib/Parse/ParseExprCXX.cpp
+++ clang/lib/Parse/ParseExprCXX.cpp
@@ -3105,10 +3105,11 @@
auto RunSignatureHelp = [&]() {
ParsedType TypeRep =
Actions.ActOnTypeName(getCurScope(), DeclaratorInfo).get();
- assert(TypeRep && "invalid types should be handled before");
- QualType PreferredType = Actions.ProduceConstructorSignatureHelp(
- getCurScope(), TypeRep.get()->getCanonicalTypeInternal(),
- DeclaratorInfo.getEndLoc(), ConstructorArgs, ConstructorLParen);
+ QualType PreferredType;
+ if (TypeRep)
+ PreferredType = Actions.ProduceConstructorSignatureHelp(
+ getCurScope(), TypeRep.get()->getCanonicalTypeInternal(),
+ DeclaratorInfo.getEndLoc(), ConstructorArgs, ConstructorLParen);
CalledSignatureHelp = true;
return PreferredType;
};
Index: clang/include/clang/AST/Type.h
===================================================================
--- clang/include/clang/AST/Type.h
+++ clang/include/clang/AST/Type.h
@@ -2139,6 +2139,11 @@
return static_cast<TypeDependence>(TypeBits.Dependence);
}
+ /// Whether this type is an error type.
+ bool isErrorType() const {
+ return getDependence() & TypeDependence::Error;
+ }
+
/// Whether this type is a dependent type, meaning that its definition
/// somehow depends on a template parameter (C++ [temp.dep.type]).
bool isDependentType() const {
Index: clang/include/clang/AST/DependenceFlags.h
===================================================================
--- clang/include/clang/AST/DependenceFlags.h
+++ clang/include/clang/AST/DependenceFlags.h
@@ -50,14 +50,16 @@
/// Whether this type is a variably-modified type (C99 6.7.5).
VariablyModified = 8,
- // FIXME: add Error bit.
+ /// Whether this type references an error, e.g. decltype(err-expression)
+ /// yields an error type.
+ Error = 16,
None = 0,
- All = 15,
+ All = 31,
DependentInstantiation = Dependent | Instantiation,
- LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue=*/VariablyModified)
+ LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue=*/Error)
};
};
using TypeDependence = TypeDependenceScope::TypeDependence;
@@ -147,6 +149,7 @@
return translate(V, UnexpandedPack, TypeDependence::UnexpandedPack) |
translate(V, Instantiation, TypeDependence::Instantiation) |
translate(V, Dependent, TypeDependence::Dependent) |
+ translate(V, Error, TypeDependence::Error) |
translate(V, VariablyModified, TypeDependence::VariablyModified);
}
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
