227 lines
11 KiB
C
227 lines
11 KiB
C
/* $NetBSD: decl_direct_abstract.c,v 1.12 2024/01/28 08:17:27 rillig Exp $ */
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# 3 "decl_direct_abstract.c"
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/*
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* Test parsing of direct-abstract-declarator (C99 6.7.6), which are a tricky
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* part of the C standard since they require lookahead and are so complicated
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* that GCC's parser dedicates 34 lines of comments to this topic.
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*
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* See msg_155.c.
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*/
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/* lint1-extra-flags: -X 351 */
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struct incompatible {
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int member;
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} x;
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void
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c99_6_7_6_examples(void)
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{
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/* expect+1: ... 'int' ... */
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x = (int)x;
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/* expect+1: ... 'pointer to int' ... */
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x = (int *)x;
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/* expect+1: ... 'array[3] of pointer to int' ... */
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x = (int *[3])x;
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/* expect+1: ... 'pointer to array[3] of int' ... */
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x = (int (*)[3])x;
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/* expect+1: ... 'pointer to array[unknown_size] of int' ... */
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x = (int (*)[*])x;
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/* expect+1: ... 'function() returning pointer to int' ... */
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x = (int *())x;
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/* expect+1: ... 'pointer to function(void) returning int' ... */
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x = (int (*)(void))x;
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/* expect+1: ... 'array[unknown_size] of const pointer to function(unsigned int, ...) returning int' ... */
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x = (int (*const[])(unsigned int, ...))x;
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}
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void
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function_returning_char(void)
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{
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// GCC adds a pointer, then says 'char (*)(short int (*)(long int))'.
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// Clang says 'char (short (*)(long))'.
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/* cdecl says 'function (pointer to function (long) returning short) returning char' */
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/* expect+1: ... 'function(pointer to function(long) returning short) returning char' ... */
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x = (char(short (*)(long)))x;
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/* expect+1: warning: nested 'extern' declaration of 'f1' [352] */
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char f1(short (*)(long));
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/* expect+1: ... 'pointer to function(pointer to function(long) returning short) returning char' ... */
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x = f1;
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}
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void
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function_returning_pointer(void)
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{
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// GCC says 'error: cast specifies function type'.
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// Clang says 'char (short *(*)(long))'.
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/* expect+1: ... 'function(pointer to function(long) returning pointer to short) returning char' ... */
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x = (char(short *(long)))x;
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/* expect+1: warning: nested 'extern' declaration of 'f2' [352] */
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char f2(short *(long));
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// GCC adds two pointers, saying 'char (*)(short int * (*)(long int))'.
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// Clang says 'char (short *(*)(long))' */
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/* cdecl says 'syntax error' */
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/* expect+1: ... 'pointer to function(pointer to function(long) returning pointer to short) returning char' ... */
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x = f2;
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}
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void int_array(int[]);
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void int_array_3(int[3]);
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/* supported since cgram.y 1.363 from 2021-09-14 */
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void int_array_ast(int[*]);
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/* expect+1: error: null dimension [17] */
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void int_array_7_array(int[7][]);
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void int_array_7_array_3(int[7][3]);
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/* expect+1: error: null dimension [17] */
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void int_array_7_array_ast(int[7][*]);
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void int_array_array(int[][7]);
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void int_array_3_array(int[3][7]);
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/* supported since cgram.y 1.363 from 2021-09-14 */
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void int_array_ast_array(int[*][7]);
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/* expect+1: error: cannot take size/alignment of function type 'function() returning int' [144] */
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unsigned long size_unspecified_args = sizeof(int());
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/* expect+1: error: cannot take size/alignment of function type 'function(void) returning int' [144] */
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unsigned long size_prototype_void = sizeof(int(void));
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/* expect+1: error: cannot take size/alignment of function type 'function(double) returning int' [144] */
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unsigned long size_prototype_unnamed = sizeof(int(double));
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/* expect+1: error: cannot take size/alignment of function type 'function(double) returning int' [144] */
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unsigned long size_prototype_named = sizeof(int(double dbl));
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/* expect+2: error: cannot take size/alignment of function type 'function() returning int' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_unspecified_args_return_int[-1000 - (int)sizeof(int())];
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/* expect+2: error: cannot take size/alignment of function type 'function() returning char' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_unspecified_args_return_char[-1000 - (int)sizeof(char())];
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/* expect+2: error: cannot take size/alignment of function type 'function(void) returning int' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_prototype_void_return_int[-1000 - (int)sizeof(int(void))];
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/* expect+2: error: cannot take size/alignment of function type 'function(void) returning double' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_prototype_void_return_double[-1000 - (int)sizeof(double(void))];
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/* expect+2: error: cannot take size/alignment of function type 'function(double) returning int' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_prototype_unnamed_return_int[-1000 - (int)sizeof(int(double))];
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/* expect+2: error: cannot take size/alignment of function type 'function(double) returning pointer to char' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_prototype_unnamed_return_pchar[-1000 - (int)sizeof(char *(double))];
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/* expect+2: error: cannot take size/alignment of function type 'function(double) returning int' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_prototype_named_return_int[-1000 - (int)sizeof(int(double dbl))];
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/* expect+2: error: cannot take size/alignment of function type 'function(double) returning pointer to pointer to pointer to char' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int size_prototype_named_return_pppchar[-1000 - (int)sizeof(char ***(double dbl))];
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typedef struct {
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char a[1];
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} a01;
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typedef struct {
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char a[4];
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} a04;
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typedef struct {
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char a[8];
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} a08;
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typedef struct {
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char a[32];
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} a32;
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/* expect+2: error: cannot take size/alignment of function type 'function() returning struct typedef a01' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int unspecified_args_return_01[-1000 - (int)sizeof(a01())];
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/* expect+2: error: cannot take size/alignment of function type 'function() returning struct typedef a04' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int unspecified_args_return_04[-1000 - (int)sizeof(a04())];
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/* expect+2: error: cannot take size/alignment of function type 'function() returning struct typedef a08' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int unspecified_args_return_08[-1000 - (int)sizeof(a08())];
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/* expect+2: error: cannot take size/alignment of function type 'function() returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int unspecified_args_return_32[-1000 - (int)sizeof(a32())];
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/* expect+2: error: cannot take size/alignment of function type 'function(void) returning struct typedef a01' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_void_return_01[-1000 - (int)sizeof(a01(void))];
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/* expect+2: error: cannot take size/alignment of function type 'function(void) returning struct typedef a04' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_void_return_04[-1000 - (int)sizeof(a04(void))];
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/* expect+2: error: cannot take size/alignment of function type 'function(void) returning struct typedef a08' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_void_return_08[-1000 - (int)sizeof(a08(void))];
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/* expect+2: error: cannot take size/alignment of function type 'function(void) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_void_return_32[-1000 - (int)sizeof(a32(void))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a01) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_01_return_32[-1000 - (int)sizeof(a32(a01))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a04) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_04_return_32[-1000 - (int)sizeof(a32(a04))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a08) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_08_return_32[-1000 - (int)sizeof(a32(a08))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_32_return_32[-1000 - (int)sizeof(a32(a32))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a01' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_32_return_01[-1000 - (int)sizeof(a01(a32))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a04' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_32_return_04[-1000 - (int)sizeof(a04(a32))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a08' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_unnamed_32_return_08[-1000 - (int)sizeof(a08(a32))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a01) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_01_return_32[-1000 - (int)sizeof(a32(a01 arg))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a04) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_04_return_32[-1000 - (int)sizeof(a32(a04 arg))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a08) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_08_return_32[-1000 - (int)sizeof(a32(a08 arg))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a32' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_32_return_32[-1000 - (int)sizeof(a32(a32 arg))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a01' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_32_return_01[-1000 - (int)sizeof(a01(a32 arg))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a04' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_32_return_04[-1000 - (int)sizeof(a04(a32 arg))];
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/* expect+2: error: cannot take size/alignment of function type 'function(struct typedef a32) returning struct typedef a08' [144] */
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/* expect+1: error: negative array dimension (-1000) [20] */
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int prototype_named_32_return_08[-1000 - (int)sizeof(a08(a32 arg))];
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void
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abstract_decl_param_list_with_attributes(void)
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{
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typedef int unspecified_parameters(void (*)() __attribute__(()));
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typedef int no_parameters(void (*)(void) __attribute__(()));
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typedef int single_parameter(void (*)(int) __attribute__(()));
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typedef int several_parameters(void (*)(int, int) __attribute__(()));
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}
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