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Add warnings for empty elements in lists of consts

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Even though this behaviour is documented (empty elements are treated as
0), it can be misleading. By having a warning, compatibility is
maintained and potential problems in the code can be detected.

Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
This commit is contained in:
Antonio Niño Díaz
2017-12-07 22:35:34 +00:00
parent e7a8bb1140
commit 781c90b940
1 changed files with 32 additions and 15 deletions
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47
src/asm/asmy.y
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@@ -982,33 +982,50 @@ const_3bit : const
}
;
constlist_8bit : constlist_8bit_entry
| constlist_8bit_entry ',' constlist_8bit
constlist_8bit : constlist_8bit_entry
| constlist_8bit_entry ',' constlist_8bit
;
constlist_8bit_entry : { out_Skip( 1 ); }
| const_8bit { out_RelByte( &$1 ); }
| string { char *s; int length; s = $1; length = charmap_Convert(&s); out_AbsByteGroup(s, length); free(s); }
constlist_8bit_entry : /* empty */ {
out_Skip( 1 );
if( nPass==1 )
warning("Empty entry in list of 8-bit elements (treated as 0).");
} | const_8bit {
out_RelByte( &$1 );
} | string {
char *s = $1;
int length = charmap_Convert(&s);
out_AbsByteGroup(s, length);
free(s);
}
;
constlist_16bit : constlist_16bit_entry
| constlist_16bit_entry ',' constlist_16bit
constlist_16bit : constlist_16bit_entry
| constlist_16bit_entry ',' constlist_16bit
;
constlist_16bit_entry : { out_Skip( 2 ); }
| const_16bit { out_RelWord( &$1 ); }
constlist_16bit_entry : /* empty */ {
out_Skip( 2 );
if( nPass==1 )
warning("Empty entry in list of 16-bit elements (treated as 0).");
} | const_16bit {
out_RelWord( &$1 );
}
;
constlist_32bit : constlist_32bit_entry
| constlist_32bit_entry ',' constlist_32bit
constlist_32bit : constlist_32bit_entry
| constlist_32bit_entry ',' constlist_32bit
;
constlist_32bit_entry : { out_Skip( 4 ); }
| relocconst { out_RelLong( &$1 ); }
constlist_32bit_entry : /* empty */ {
out_Skip( 4 );
if( nPass==1 )
warning("Empty entry in list of 32-bit elements (treated as 0).");
} | relocconst {
out_RelLong( &$1 );
}
;
const_PCrel : relocconst
{
$$ = $1;