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gskslstatement: Parse compound statements

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This commit is contained in:
Benjamin Otte
2017-09-30 15:08:37 +02:00
parent 622dccd438
commit 607b4b40a0
2 changed files with 113 additions and 3 deletions
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113
gsk/gskslstatement.c
View File

@@ -67,9 +67,6 @@ gsk_sl_statement_alloc (const GskSlStatementClass *klass,
/* EMPTY */
/* FIXME: This exists only so we dont return NULL from empty statements (ie just a semicolon)
*/
typedef struct _GskSlStatementEmpty GskSlStatementEmpty;
struct _GskSlStatementEmpty {
@@ -104,6 +101,69 @@ static const GskSlStatementClass GSK_SL_STATEMENT_EMPTY = {
gsk_sl_statement_empty_write_spv
};
/* COMPOUND */
typedef struct _GskSlStatementCompound GskSlStatementCompound;
struct _GskSlStatementCompound {
GskSlStatement parent;
GskSlScope *scope;
GSList *statements;
};
static void
gsk_sl_statement_compound_free (GskSlStatement *statement)
{
GskSlStatementCompound *compound = (GskSlStatementCompound *) statement;
g_slist_free_full (compound->statements, (GDestroyNotify) gsk_sl_statement_unref);
if (compound->scope)
gsk_sl_scope_unref (compound->scope);
g_slice_free (GskSlStatementCompound, compound);
}
static void
gsk_sl_statement_compound_print (const GskSlStatement *statement,
GskSlPrinter *printer)
{
GskSlStatementCompound *compound = (GskSlStatementCompound *) statement;
GSList *l;
gsk_sl_printer_append (printer, "{");
gsk_sl_printer_push_indentation (printer);
for (l = compound->statements; l; l = l->next)
{
gsk_sl_printer_newline (printer);
gsk_sl_statement_print (l->data, printer);
}
gsk_sl_printer_pop_indentation (printer);
gsk_sl_printer_newline (printer);
gsk_sl_printer_append (printer, "}");
}
static guint32
gsk_sl_statement_compound_write_spv (const GskSlStatement *statement,
GskSpvWriter *writer)
{
GskSlStatementCompound *compound = (GskSlStatementCompound *) statement;
GSList *l;
for (l = compound->statements; l; l = l->next)
{
gsk_sl_statement_write_spv (l->data, writer);
}
return 0;
}
static const GskSlStatementClass GSK_SL_STATEMENT_COMPOUND = {
gsk_sl_statement_compound_free,
gsk_sl_statement_compound_print,
gsk_sl_statement_compound_write_spv
};
/* DECLARATION */
typedef struct _GskSlStatementDeclaration GskSlStatementDeclaration;
@@ -328,6 +388,50 @@ gsk_sl_statement_parse_declaration (GskSlScope *scope,
return (GskSlStatement *) declaration;
}
GskSlStatement *
gsk_sl_statement_parse_compound (GskSlScope *scope,
GskSlPreprocessor *preproc,
gboolean new_scope)
{
GskSlStatementCompound *compound;
const GskSlToken *token;
compound = gsk_sl_statement_new (GskSlStatementCompound, &GSK_SL_STATEMENT_COMPOUND);
if (new_scope)
{
compound->scope = gsk_sl_scope_new (scope, gsk_sl_scope_get_return_type (scope));
scope = compound->scope;
}
token = gsk_sl_preprocessor_get (preproc);
if (!gsk_sl_token_is (token, GSK_SL_TOKEN_LEFT_BRACE))
{
gsk_sl_preprocessor_error (preproc, SYNTAX, "Expected an opening \"{\"");
return (GskSlStatement *) compound;
}
gsk_sl_preprocessor_consume (preproc, compound);
for (token = gsk_sl_preprocessor_get (preproc);
!gsk_sl_token_is (token, GSK_SL_TOKEN_RIGHT_BRACE) && !gsk_sl_token_is (token, GSK_SL_TOKEN_EOF);
token = gsk_sl_preprocessor_get (preproc))
{
GskSlStatement *statement;
statement = gsk_sl_statement_parse (scope, preproc);
compound->statements = g_slist_prepend (compound->statements, statement);
}
compound->statements = g_slist_reverse (compound->statements);
if (!gsk_sl_token_is (token, GSK_SL_TOKEN_RIGHT_BRACE))
{
gsk_sl_preprocessor_error (preproc, SYNTAX, "Expected closing \"}\" at end of block.");
gsk_sl_preprocessor_sync (preproc, GSK_SL_TOKEN_RIGHT_BRACE);
}
gsk_sl_preprocessor_consume (preproc, compound);
return (GskSlStatement *) compound;
}
GskSlStatement *
gsk_sl_statement_parse (GskSlScope *scope,
GskSlPreprocessor *preproc)
@@ -347,6 +451,9 @@ gsk_sl_statement_parse (GskSlScope *scope,
gsk_sl_preprocessor_error (preproc, SYNTAX, "Unexpected end of document");
return (GskSlStatement *) gsk_sl_statement_new (GskSlStatementEmpty, &GSK_SL_STATEMENT_EMPTY);
case GSK_SL_TOKEN_LEFT_BRACE:
return gsk_sl_statement_parse_compound (scope, preproc, TRUE);
case GSK_SL_TOKEN_CONST:
case GSK_SL_TOKEN_IN:
case GSK_SL_TOKEN_OUT:

3
gsk/gskslstatementprivate.h
View File

@@ -27,6 +27,9 @@ G_BEGIN_DECLS
GskSlStatement * gsk_sl_statement_parse (GskSlScope *scope,
GskSlPreprocessor *preproc);
GskSlStatement * gsk_sl_statement_parse_compound (GskSlScope *scope,
GskSlPreprocessor *preproc,
gboolean new_scope);
GskSlStatement * gsk_sl_statement_ref (GskSlStatement *statement);
void gsk_sl_statement_unref (GskSlStatement *statement);