Our current C pretty printer output sometimes looks a bit goofy:
"expected ‘enum F *’ but argument is of type ‘enum F *’".
It's because it always prints "struct"/"union"/"enum" even though
the type is a typedef name. This patch ought to fix this.
We've got a bunch of reports about this over the years...
The C++ printer can also print "B* {aka A*}", I'll try to learn
c_tree_printer to do something similar as well.
Bootstrapped/regtested on x86_64-linux, ok for trunk?
2014-10-24 Marek Polacek <pola...@redhat.com>
PR c/56980
* c-pretty-print.c (c_pretty_printer::simple_type_specifier): Don't
print "struct"/"union"/"enum" for typedefed names.
* gcc.dg/pr56980.c: New test.
diff --git gcc/c-family/c-pretty-print.c gcc/c-family/c-pretty-print.c
index 3b2dbc1..9096a07 100644
--- gcc/c-family/c-pretty-print.c
+++ gcc/c-family/c-pretty-print.c
@@ -416,7 +416,9 @@ c_pretty_printer::simple_type_specifier (tree t)
case UNION_TYPE:
case RECORD_TYPE:
case ENUMERAL_TYPE:
- if (code == UNION_TYPE)
+ if (TYPE_NAME (t) && TREE_CODE (TYPE_NAME (t)) == TYPE_DECL)
+ /* Don't decorate the type if this is a typedef name. */;
+ else if (code == UNION_TYPE)
pp_c_ws_string (this, "union");
else if (code == RECORD_TYPE)
pp_c_ws_string (this, "struct");
diff --git gcc/testsuite/gcc.dg/pr56980.c gcc/testsuite/gcc.dg/pr56980.c
index e69de29..f48379a 100644
--- gcc/testsuite/gcc.dg/pr56980.c
+++ gcc/testsuite/gcc.dg/pr56980.c
@@ -0,0 +1,24 @@
+/* PR c/56980 */
+/* { dg-do compile } */
+
+typedef struct A { int i; } B;
+typedef union U { int i; } V;
+typedef enum E { G } F;
+
+void foo_s (struct A); /* { dg-message "expected .struct A. but argument is of
type .B \\*." } */
+void foo_u (union U); /* { dg-message "expected .union U. but argument is of
type .V \\*." } */
+void foo_e (enum E); /* { dg-message "expected .enum E. but argument is of
type .F \\*." } */
+void foo_sp (B *); /* { dg-message "expected .B \\*. but argument is of type
.struct B \\*." } */
+void foo_up (V *); /* { dg-message "expected .V \\*. but argument is of type
.union V \\*." } */
+void foo_ep (F *); /* { dg-message "expected .F \\*. but argument is of type
.enum F \\*." } */
+
+void
+bar (B *b, V *v, F *f)
+{
+ foo_s (b); /* { dg-error "incompatible" } */
+ foo_u (v); /* { dg-error "incompatible" } */
+ foo_e (f); /* { dg-error "incompatible" } */
+ foo_sp ((struct B *) b); /* { dg-error "passing argument" } */
+ foo_up ((union V *) v); /* { dg-error "passing argument" } */
+ foo_ep (__extension__ (enum F *) f); /* { dg-error "passing argument" } */
+}
Marek
