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https://github.com/DarkPlacesEngine/gmqcc.git
synced 2024-11-27 14:12:36 +00:00
Implementing typedef
This commit is contained in:
Wolfgang (Blub) Bumiller
parent
a1b50603e5
commit
b851f542ac
1 changed files with 123 additions and 19 deletions
142
parser.c
142
parser.c
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@ -32,6 +32,7 @@
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#define PARSER_HT_LOCALS 2
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#define PARSER_HT_SIZE 1024
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#define TYPEDEF_HT_SIZE 16
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typedef struct {
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lex_file *lex;
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@ -60,10 +61,13 @@ typedef struct {
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ht *variables;
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ht htfields;
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ht htglobals;
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ht *typedefs;
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/* not to be used directly, we use the hash table */
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ast_expression **_locals;
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size_t *_blocklocals;
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ast_value **_typedefs;
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size_t *_blocktypedefs;
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size_t errors;
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@ -80,7 +84,7 @@ typedef struct {
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static void parser_enterblock(parser_t *parser);
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static bool parser_leaveblock(parser_t *parser);
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static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e);
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static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, bool is_const);
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static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, bool is_const, ast_value *cached_typedef);
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static ast_block* parse_block(parser_t *parser, bool warnreturn);
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static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn);
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static ast_expression* parse_statement_or_block(parser_t *parser);
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@ -332,6 +336,20 @@ static ast_expression* parser_find_var(parser_t *parser, const char *name)
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return v;
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}
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static ast_value* parser_find_typedef(parser_t *parser, const char *name)
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{
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size_t i, hash;
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ast_value *e;
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hash = util_hthash(parser->typedefs[0], name);
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for (i = vec_size(parser->typedefs); i > 0;) {
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--i;
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if ( (e = (ast_value*)util_htgeth(parser->typedefs[i], name, hash)) )
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return e;
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}
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return NULL;
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}
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typedef struct
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{
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size_t etype; /* 0 = expression, others are operators */
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@ -1576,12 +1594,14 @@ static void parser_enterblock(parser_t *parser)
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{
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vec_push(parser->variables, util_htnew(PARSER_HT_SIZE));
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vec_push(parser->_blocklocals, vec_size(parser->_locals));
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vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
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vec_push(parser->_blocktypedefs, vec_size(parser->_typedefs));
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}
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static bool parser_leaveblock(parser_t *parser)
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{
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bool rv = true;
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size_t locals;
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size_t locals, typedefs;
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if (vec_size(parser->variables) <= PARSER_HT_LOCALS) {
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parseerror(parser, "internal error: parser_leaveblock with no block");
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@ -1607,6 +1627,14 @@ static bool parser_leaveblock(parser_t *parser)
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}
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}
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typedefs = vec_last(parser->_blocktypedefs);
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while (vec_size(parser->_typedefs) != typedefs) {
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ast_delete(vec_last(parser->_typedefs));
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vec_pop(parser->_typedefs);
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}
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util_htdel(vec_last(parser->typedefs));
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vec_pop(parser->typedefs);
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return rv;
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}
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@ -1811,8 +1839,9 @@ static bool parse_dowhile(parser_t *parser, ast_block *block, ast_expression **o
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static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
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{
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ast_loop *aloop;
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ast_loop *aloop;
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ast_expression *initexpr, *cond, *increment, *ontrue;
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ast_value *typevar;
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bool retval = true;
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lex_ctx ctx = parser_ctx(parser);
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@ -1835,7 +1864,11 @@ static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
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goto onerr;
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}
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if (parser->tok == TOKEN_TYPENAME) {
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typevar = NULL;
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if (parser->tok == TOKEN_IDENT)
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typevar = parser_find_typedef(parser, parser_tokval(parser));
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if (typevar || parser->tok == TOKEN_TYPENAME) {
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if (opts_standard != COMPILER_GMQCC) {
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if (parsewarning(parser, WARN_EXTENSIONS,
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"current standard does not allow variable declarations in for-loop initializers"))
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@ -1844,7 +1877,7 @@ static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
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parseerror(parser, "TODO: assignment of new variables to be non-const");
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goto onerr;
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if (!parse_variable(parser, block, true, false))
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if (!parse_variable(parser, block, true, false, typevar))
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goto onerr;
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}
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else if (parser->tok != ';')
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@ -2133,7 +2166,11 @@ static bool parse_switch(parser_t *parser, ast_block *block, ast_expression **ou
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static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases)
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{
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if (parser->tok == TOKEN_TYPENAME || parser->tok == '.')
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ast_value *typevar = NULL;
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if (parser->tok == TOKEN_IDENT)
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typevar = parser_find_typedef(parser, parser_tokval(parser));
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if (typevar || parser->tok == TOKEN_TYPENAME || parser->tok == '.')
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{
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/* local variable */
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if (!block) {
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@ -2144,7 +2181,7 @@ static bool parse_statement(parser_t *parser, ast_block *block, ast_expression *
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if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
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return false;
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}
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if (!parse_variable(parser, block, false, false))
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if (!parse_variable(parser, block, false, false, typevar))
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return false;
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*out = NULL;
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return true;
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@ -2161,7 +2198,7 @@ static bool parse_statement(parser_t *parser, ast_block *block, ast_expression *
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parseerror(parser, "expected variable declaration");
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return false;
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}
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if (!parse_variable(parser, block, true, false))
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if (!parse_variable(parser, block, true, false, NULL))
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return false;
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*out = NULL;
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return true;
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@ -2983,7 +3020,7 @@ cleanup:
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return false;
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}
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static ast_value *parse_typename(parser_t *parser, ast_value **storebase);
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static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef);
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static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
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{
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lex_ctx ctx;
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@ -3034,7 +3071,7 @@ static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
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else
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{
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/* for anything else just parse a typename */
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param = parse_typename(parser, NULL);
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param = parse_typename(parser, NULL, NULL);
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if (!param)
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goto on_error;
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vec_push(params, param);
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@ -3144,7 +3181,7 @@ static ast_value *parse_arraysize(parser_t *parser, ast_value *var)
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* void() foo(), bar
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* then the type-information 'void()' can be stored in 'storebase'
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*/
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static ast_value *parse_typename(parser_t *parser, ast_value **storebase)
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static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef)
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{
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ast_value *var, *tmp;
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lex_ctx ctx;
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@ -3163,14 +3200,20 @@ static ast_value *parse_typename(parser_t *parser, ast_value **storebase)
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parseerror(parser, "expected typename for field definition");
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return NULL;
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}
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if (parser->tok != TOKEN_TYPENAME) {
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if (parser->tok == TOKEN_IDENT)
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cached_typedef = parser_find_typedef(parser, parser_tokval(parser));
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if (!cached_typedef && parser->tok != TOKEN_TYPENAME) {
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parseerror(parser, "expected typename");
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return NULL;
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}
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}
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/* generate the basic type value */
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var = ast_value_new(ctx, "<type>", parser_token(parser)->constval.t);
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if (cached_typedef) {
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var = ast_value_copy(cached_typedef);
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ast_value_set_name(var, "<type(from_def)>");
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} else
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var = ast_value_new(ctx, "<type>", parser_token(parser)->constval.t);
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/* do not yet turn into a field - remember:
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* .void() foo; is a field too
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* .void()() foo; is a function
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@ -3260,7 +3303,47 @@ static ast_value *parse_typename(parser_t *parser, ast_value **storebase)
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return var;
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}
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static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, bool is_const)
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static bool parse_typedef(parser_t *parser)
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{
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ast_value *typevar, *oldtype;
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ast_expression *old;
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typevar = parse_typename(parser, NULL, NULL);
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if (!typevar)
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return false;
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if ( (old = parser_find_var(parser, typevar->name)) ) {
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parseerror(parser, "cannot define a type with the same name as a variable: %s\n"
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" -> `%s` has been declared here: %s:%i",
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typevar->name, ast_ctx(old).file, ast_ctx(old).line);
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ast_delete(typevar);
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return false;
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}
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if ( (oldtype = parser_find_typedef(parser, typevar->name)) ) {
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parseerror(parser, "type `%s` has already been declared here: %s:%i",
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typevar->name, ast_ctx(oldtype).file, ast_ctx(oldtype).line);
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ast_delete(typevar);
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return false;
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}
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vec_push(parser->_typedefs, typevar);
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util_htset(vec_last(parser->typedefs), typevar->name, typevar);
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if (parser->tok != ';') {
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parseerror(parser, "expected semicolon after typedef");
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return false;
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}
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if (!parser_next(parser)) {
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parseerror(parser, "parse error after typedef");
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return false;
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}
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return true;
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}
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static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, bool is_const, ast_value *cached_typedef)
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{
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ast_value *var;
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ast_value *proto;
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@ -3278,7 +3361,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
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ast_member *me[3];
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/* get the first complete variable */
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var = parse_typename(parser, &basetype);
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var = parse_typename(parser, &basetype, cached_typedef);
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if (!var) {
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if (basetype)
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ast_delete(basetype);
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@ -3754,9 +3837,13 @@ cleanup:
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static bool parser_global_statement(parser_t *parser)
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{
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if (parser->tok == TOKEN_TYPENAME || parser->tok == '.')
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ast_value *istype = NULL;
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if (parser->tok == TOKEN_IDENT)
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istype = parser_find_typedef(parser, parser_tokval(parser));
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if (istype || parser->tok == TOKEN_TYPENAME || parser->tok == '.')
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{
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return parse_variable(parser, NULL, false, false);
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return parse_variable(parser, NULL, false, false, istype);
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}
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else if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "var"))
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{
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@ -3765,7 +3852,7 @@ static bool parser_global_statement(parser_t *parser)
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parseerror(parser, "expected variable declaration after 'var'");
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return false;
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}
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return parse_variable(parser, NULL, true, false);
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return parse_variable(parser, NULL, true, false, NULL);
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}
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}
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else if (parser->tok == TOKEN_KEYWORD)
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@ -3775,7 +3862,14 @@ static bool parser_global_statement(parser_t *parser)
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parseerror(parser, "expected variable declaration after 'const'");
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return false;
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}
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return parse_variable(parser, NULL, true, true);
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return parse_variable(parser, NULL, true, true, NULL);
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}
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else if (!strcmp(parser_tokval(parser), "typedef")) {
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if (!parser_next(parser)) {
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parseerror(parser, "expected type definition after 'typedef'");
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return false;
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}
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return parse_typedef(parser);
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}
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parseerror(parser, "unrecognized keyword `%s`", parser_tokval(parser));
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return false;
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@ -3897,6 +3991,7 @@ bool parser_init()
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vec_push(parser->variables, parser->htfields = util_htnew(PARSER_HT_SIZE));
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vec_push(parser->variables, parser->htglobals = util_htnew(PARSER_HT_SIZE));
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vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
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return true;
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}
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@ -3999,6 +4094,15 @@ void parser_cleanup()
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for (i = 0; i < vec_size(parser->variables); ++i)
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util_htdel(parser->variables[i]);
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vec_free(parser->variables);
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vec_free(parser->_blocklocals);
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for (i = 0; i < vec_size(parser->_typedefs); ++i)
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ast_delete(parser->_typedefs[i]);
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vec_free(parser->_typedefs);
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for (i = 0; i < vec_size(parser->typedefs); ++i)
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util_htdel(parser->typedefs[i]);
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vec_free(parser->typedefs);
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vec_free(parser->_blocktypedefs);
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mem_d(parser);
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}
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