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c-decl.c (grokdeclarator): Don't give a warning about defaulting to int for plain complex which defaults...

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* c-decl.c (grokdeclarator): Don't give a warning about defaulting
	to int for plain complex which defaults to complex double.  Do
	warn about defaulting to complex double if pedantic.  Warn about
	complex integer types if pedantic.  Warn about complex types if
	pedantic and not in C99 mode.
	* c-typeck.c (build_unary_op): If pedantic, warn about use of ~
	for complex conjugation.

testsuite:
	* gcc.dg/c90-complex-1.c, gcc.dg/c99-complex-1.c: New tests.

From-SVN: r36478
This commit is contained in:
Joseph Myers 2000-09-17 20:39:56 +01:00 committed by Joseph Myers
parent bc5006c725
commit 60e9d01cf7
6 changed files with 75 additions and 4 deletions

10
gcc/ChangeLog

@ -1,3 +1,13 @@
2000-09-17 Joseph S. Myers <jsm28@cam.ac.uk>
* c-decl.c (grokdeclarator): Don't give a warning about defaulting
to int for plain complex which defaults to complex double. Do
warn about defaulting to complex double if pedantic. Warn about
complex integer types if pedantic. Warn about complex types if
pedantic and not in C99 mode.
* c-typeck.c (build_unary_op): If pedantic, warn about use of ~
for complex conjugation.
2000-09-17 Joseph S. Myers <jsm28@cam.ac.uk>
* contrib.texi: Update my entry.

23
gcc/c-decl.c

@ -4078,7 +4078,8 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
{
if ((! (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
| (1 << (int) RID_SIGNED)
| (1 << (int) RID_UNSIGNED))))
| (1 << (int) RID_UNSIGNED)
| (1 << (int) RID_COMPLEX))))
/* Don't warn about typedef foo = bar. */
&& ! (specbits & (1 << (int) RID_TYPEDEF) && initialized)
&& ! in_system_header)
@ -4209,6 +4210,8 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
if (specbits & 1 << (int) RID_COMPLEX)
{
if (pedantic && !flag_isoc99)
pedwarn ("ISO C89 does not support complex types");
/* If we just have "complex", it is equivalent to
"complex double", but if any modifiers at all are specified it is
the complex form of TYPE. E.g, "complex short" is
@ -4218,9 +4221,17 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
&& ! (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
| (1 << (int) RID_SIGNED)
| (1 << (int) RID_UNSIGNED))))
type = complex_double_type_node;
{
if (pedantic)
pedwarn ("ISO C does not support plain `complex' meaning `double complex'");
type = complex_double_type_node;
}
else if (type == integer_type_node)
type = complex_integer_type_node;
{
if (pedantic)
pedwarn ("ISO C does not support complex integer types");
type = complex_integer_type_node;
}
else if (type == float_type_node)
type = complex_float_type_node;
else if (type == double_type_node)
@ -4228,7 +4239,11 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
else if (type == long_double_type_node)
type = complex_long_double_type_node;
else
type = build_complex_type (type);
{
if (pedantic)
pedwarn ("ISO C does not support complex integer types");
type = build_complex_type (type);
}
}
/* Figure out the type qualifiers for the declaration. There are

2
gcc/c-typeck.c

@ -2807,6 +2807,8 @@ build_unary_op (code, xarg, noconvert)
if (typecode == COMPLEX_TYPE)
{
code = CONJ_EXPR;
if (pedantic)
pedwarn ("ISO C does not support `~' for complex conjugation");
if (!noconvert)
arg = default_conversion (arg);
}

4
gcc/testsuite/ChangeLog

@ -1,3 +1,7 @@
2000-09-17 Joseph S. Myers <jsm28@cam.ac.uk>
* gcc.dg/c90-complex-1.c, gcc.dg/c99-complex-1.c: New tests.
2000-09-17 Greg McGary <greg@mcgary.org>
* gcc.c-torture/execute/20000917-1.c: New test.

7
gcc/testsuite/gcc.dg/c90-complex-1.c Normal file

@ -0,0 +1,7 @@
/* Test for _Complex: in C99 only. */
/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
_Complex double foo; /* { dg-bogus "warning" "warning in place of error" } */
/* { dg-error "C" "_Complex not in C90" { target *-*-* } 6 } */

33
gcc/testsuite/gcc.dg/c99-complex-1.c Normal file

@ -0,0 +1,33 @@
/* Test for _Complex: in C99 only. A few basic tests. */
/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
/* Test _Complex allowed on floating types. */
float _Complex a;
_Complex float b;
double _Complex c;
_Complex double d;
long double _Complex e;
_Complex long double f;
/* Plain `_Complex' for complex double is a GNU extension. */
_Complex g; /* { dg-bogus "warning" "warning in place of error" } */
/* { dg-error "plain" "plain _Complex" { target *-*-* } 16 } */
/* Complex integer types are GNU extensions. */
_Complex int h; /* { dg-bogus "warning" "warning in place of error" } */
/* { dg-error "complex integer" "_Complex int" { target *-*-* } 20 } */
_Complex long i; /* { dg-bogus "warning" "warning in place of error" } */
/* { dg-error "complex integer" "_Complex long" { target *-*-* } 22 } */
/* Use of ~ for complex conjugation is a GNU extension, but a constraint
violation (6.5.3.3p1) in C99.
*/
_Complex double
foo (_Complex double z)
{
return ~z; /* { dg-bogus "warning" "warning in place of error" } */
/* { dg-error "complex conj" "~ for conjugation" { target *-*-* } 31 } */
}