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glsl: glcpp: Rename and document _glcpp_parser_expand_if

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This function is currently used only in the expansion of #if lines,
but we will soon be using it more generally (for the expansion of
(_glcpp_parser_expand_and_lex_from) and some more documentation.

Signed-off-by: Carl Worth <cworth@cworth.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Carl Worth
2012-06-09 16:29:38 -07:00
parent 1db463ce2e
commit 39f8c46eaa
1 changed files with 20 additions and 5 deletions
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25
src/glsl/glcpp/glcpp-parse.y
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@@ -105,9 +105,15 @@ _parser_active_list_pop (glcpp_parser_t *parser);
static int
_parser_active_list_contains (glcpp_parser_t *parser, const char *identifier);
/* Expand list, and begin lexing from the result (after first
* prefixing a token of type 'head_token_type').
*/
static void
_glcpp_parser_expand_if (glcpp_parser_t *parser, int type, token_list_t *list);
_glcpp_parser_expand_and_lex_from (glcpp_parser_t *parser,
int head_token_type,
token_list_t *list);
/* Perform macro expansion in-place on the given list. */
static void
_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
token_list_t *list);
@@ -233,7 +239,8 @@ control_line:
if (parser->skip_stack == NULL ||
parser->skip_stack->type == SKIP_NO_SKIP)
{
_glcpp_parser_expand_if (parser, IF_EXPANDED, $2);
_glcpp_parser_expand_and_lex_from (parser,
IF_EXPANDED, $2);
}
else
{
@@ -272,7 +279,8 @@ control_line:
if (parser->skip_stack &&
parser->skip_stack->type == SKIP_TO_ELSE)
{
_glcpp_parser_expand_if (parser, ELIF_EXPANDED, $2);
_glcpp_parser_expand_and_lex_from (parser,
ELIF_EXPANDED, $2);
}
else
{
@@ -1272,14 +1280,21 @@ _token_list_create_with_one_space (void *ctx)
return list;
}
/* Perform macro expansion on 'list', placing the resulting tokens
* into a new list which is initialized with a first token of type
* 'head_token_type'. Then begin lexing from the resulting list,
* (return to the current lexing source when this list is exhausted).
*/
static void
_glcpp_parser_expand_if (glcpp_parser_t *parser, int type, token_list_t *list)
_glcpp_parser_expand_and_lex_from (glcpp_parser_t *parser,
int head_token_type,
token_list_t *list)
{
token_list_t *expanded;
token_t *token;
expanded = _token_list_create (parser);
token = _token_create_ival (parser, type, type);
token = _token_create_ival (parser, head_token_type, head_token_type);
_token_list_append (expanded, token);
_glcpp_parser_expand_token_list (parser, list);
_token_list_append_list (expanded, list);