llvm-project/clang/test/Misc/ast-print-enum-decl.c

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[AST] Print correct tag decl for tag specifier For example, given: void fn() { struct T *p0; struct T { int i; } *p1; } -ast-print produced: void fn() { struct T { int i; } *p0; struct T { int i; } *p1; } Compiling that fails with a redefinition error. Given: void fn() { struct T *p0; struct __attribute__((deprecated)) T *p1; } -ast-print dropped the attribute. Details: For a tag specifier (that is, struct/union/class/enum used as a type specifier in a declaration) that was also a tag declaration (that is, first occurrence of the tag) or tag redeclaration (that is, later occurrence that specifies attributes or a member list), clang printed the tag specifier as either (1) the full tag definition if one existed, or (2) the first tag declaration otherwise. Redefinition errors were sometimes introduced, as in the first example above. Even when that was impossible because no member list was ever specified, attributes were sometimes lost, thus changing semantics and diagnostics, as in the second example above. This patch fixes a major culprit for these problems. It does so by creating an ElaboratedType with a new OwnedDecl member wherever an occurrence of a tag type is a (re)declaration of that tag type. PrintingPolicy's IncludeTagDefinition used to trigger printing of the member list, attributes, etc. for a tag specifier by using a tag (re)declaration selected as described above. Now, it triggers the same thing except it uses the tag (re)declaration stored in the OwnedDecl. Of course, other tooling can now make use of the new OwnedDecl as well. Also, to be more faithful to the original source, this patch suppresses printing of attributes inherited from previous declarations. Reviewed by: rsmith, aaron.ballman Differential Revision: https://reviews.llvm.org/D45463 llvm-svn: 332281
2018-05-15 03:36:45 +08:00
// First check compiling and printing of this file.
//
// RUN: %clang_cc1 -verify -ast-print %s > %t.c
// RUN: FileCheck --check-prefixes=CHECK,PRINT %s --input-file %t.c
//
// Now check compiling and printing of the printed file.
//
// RUN: echo "// expected""-warning@* 6 {{'T' is deprecated}}" >> %t.c
// RUN: echo "// expected""-note@* 6 {{'T' has been explicitly marked deprecated here}}" >> %t.c
//
// RUN: %clang_cc1 -verify -ast-print %t.c \
// RUN: | FileCheck --check-prefixes=CHECK,PRINT %s
// END.
// CHECK-LABEL: defFirst
void defFirst() {
// PRINT-NEXT: enum
// PRINT-DAG: __attribute__((aligned(16)))
// PRINT-DAG: __attribute__((deprecated("")))
// PRINT-SAME: T {
// PRINT-NEXT: E0,
// PRINT-NEXT: E1
// PRINT-NEXT: } *p0;
// expected-warning@+2 {{'T' is deprecated}}
// expected-note@+1 2 {{'T' has been explicitly marked deprecated here}}
enum __attribute__((aligned(16))) __attribute__((deprecated(""))) T {
E0, E1
} *p0;
// PRINT-NEXT: enum T *p1;
enum T *p1; // expected-warning {{'T' is deprecated}}
}
// CHECK-LABEL: defLast
void defLast() {
// PRINT-NEXT: enum __attribute__((aligned(16))) T *p0;
enum __attribute__((aligned(16))) T *p0;
// PRINT-NEXT: enum __attribute__((deprecated(""))) T {
// PRINT-NEXT: E0,
// PRINT-NEXT: E1
// PRINT-NEXT: } *p1;
// expected-warning@+2 {{'T' is deprecated}}
// expected-note@+1 {{'T' has been explicitly marked deprecated here}}
enum __attribute__((deprecated(""))) T { E0, E1 } *p1;
}
// CHECK-LABEL: defMiddle
void defMiddle() {
// PRINT-NEXT: enum __attribute__((deprecated(""))) T *p0;
// expected-warning@+2 {{'T' is deprecated}}
// expected-note@+1 3 {{'T' has been explicitly marked deprecated here}}
enum __attribute__((deprecated(""))) T *p0;
// PRINT-NEXT: enum __attribute__((aligned(16))) T {
// PRINT-NEXT: E0
// PRINT-NEXT: E1
// PRINT-NEXT: } *p1;
enum __attribute__((aligned(16))) T { E0, E1 } *p1; // expected-warning {{'T' is deprecated}}
// PRINT-NEXT: enum T *p2;
enum T *p2; // expected-warning {{'T' is deprecated}}
}
// CHECK-LABEL: declsOnly
void declsOnly() {
// FIXME: For some reason, attributes are ignored if they're not on the first
// declaration and not on the definition.
// PRINT-NEXT: enum __attribute__((aligned)) T *p0;
enum __attribute__((aligned)) T *p0;
// PRINT-NEXT: enum T *p1;
enum __attribute__((may_alias)) T *p1;
// PRINT-NEXT: enum T *p2;
enum T *p2;
// PRINT-NEXT: enum T *p3;
enum __attribute__((deprecated(""))) T *p3;
// PRINT-NEXT: enum T *p4;
enum T *p4;
}
// Check that tag decl groups stay together in decl contexts.
// PRINT-LABEL: enum DeclGroupAtFileScope {
// PRINT-NEXT: DeclGroupAtFileScope0
// PRINT-NEXT: } *DeclGroupAtFileScopePtr;
enum DeclGroupAtFileScope { DeclGroupAtFileScope0 } *DeclGroupAtFileScopePtr;
// PRINT-LABEL: struct DeclGroupInMemberList
struct DeclGroupInMemberList {
// PRINT-NEXT: enum T1 {
// PRINT-NEXT: T10
// PRINT-NEXT: } *p0;
enum T1 { T10 } *p0;
// PRINT-NEXT: enum T2 {
// PRINT-NEXT: T20
// PRINT-NEXT: } *p1, *p2;
enum T2 { T20 } *p1, *p2;
// PRINT-NEXT: };
};