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|
#line 2 "directives.rules"
/*
* Start symbol
*/
LANGUAGE_DIRECTIVE: "#include" STRING {
dmnsn_declare_symbol(symtable, "$include", $2);
dmnsn_delete_astnode($2);
}
| "#declare" IDENTIFIER "=" RVALUE {
dmnsn_declare_symbol(symtable, $2.ptr, $4);
dmnsn_delete_astnode($2);
dmnsn_delete_astnode($4);
}
| "#local" IDENTIFIER "=" RVALUE {
dmnsn_local_symbol(symtable, $2.ptr, $4);
dmnsn_delete_astnode($2);
dmnsn_delete_astnode($4);
}
| "#undef" IDENTIFIER {
dmnsn_undef_symbol(symtable, $2.ptr);
dmnsn_delete_astnode($2);
}
| "#if" "(" CONDITIONAL ")" {
dmnsn_astnode cond = dmnsn_eval($3, symtable);
dmnsn_delete_astnode($3);
if (cond.type == DMNSN_AST_NONE) {
dmnsn_delete_astnode(cond);
YYERROR;
}
dmnsn_local_symbol(symtable, "$cond", cond);
dmnsn_delete_astnode(cond);
}
| "#ifdef" "(" IDENTIFIER ")" {
dmnsn_astnode *node = dmnsn_find_symbol(symtable, $3.ptr);
dmnsn_local_symbol(symtable, "$cond",
dmnsn_new_ast_integer(node ? 1 : 0));
dmnsn_delete_astnode($3);
}
| "#ifndef" "(" IDENTIFIER ")" {
dmnsn_astnode *node = dmnsn_find_symbol(symtable, $3.ptr);
dmnsn_local_symbol(symtable, "$cond",
dmnsn_new_ast_integer(node ? 0 : 1));
dmnsn_delete_astnode($3);
}
| "#version" FLOAT ";" {
dmnsn_diagnostic(@$.first_filename, @$.first_line,
@$.first_column,
"WARNING: POV-Ray #version"
" backwards-compatibility not supported");
dmnsn_delete_astnode($2);
}
| "#debug" STRING {
fprintf(stderr, "%s\n", (const char *)$2.ptr);
dmnsn_delete_astnode($2);
}
| "#warning" STRING {
dmnsn_diagnostic(@$.first_filename, @$.first_line,
@$.first_column,
"WARNING: %s", (const char *)$2.ptr);
dmnsn_delete_astnode($2);
}
| "#error" STRING {
dmnsn_diagnostic(@$.first_filename, @$.first_line,
@$.first_column,
"%s", (const char *)$2.ptr);
dmnsn_delete_astnode($2);
YYERROR;
}
| "#macro" IDENTIFIER "(" DECL_PARAMS ")" {
dmnsn_declare_symbol(symtable, $2.ptr, $4);
dmnsn_local_symbol(symtable, "$macro",
dmnsn_new_ast_string($2.ptr));
dmnsn_delete_astnode($2);
dmnsn_delete_astnode($4);
}
| IDENTIFIER "(" PARAMS ")" {
dmnsn_astnode *node = dmnsn_find_symbol(symtable, $1.ptr);
dmnsn_assert(node && node->type == DMNSN_AST_MACRO,
"Attempt to expand non-macro.");
dmnsn_delete_astnode($1);
unsigned int nparams = dmnsn_array_size(node->children);
unsigned int nparams_given = dmnsn_array_size($3.children);
if (nparams_given != nparams) {
dmnsn_diagnostic(@$.first_filename, @$.first_line,
@$.first_column,
"wrong number of macro arguments"
" (%u; should be %u)",
nparams_given, nparams);
dmnsn_delete_astnode($3);
YYERROR;
}
unsigned int i;
for (i = 0; i < nparams; ++i) {
dmnsn_astnode id, param;
dmnsn_array_get(node->children, i, &id);
dmnsn_array_get($3.children, i, ¶m);
dmnsn_local_symbol(symtable, id.ptr, param);
}
dmnsn_delete_astnode($3);
}
;
RVALUE: ARITH_EXPR ";" %dprec 2 {
$$ = dmnsn_eval($1, symtable);
dmnsn_delete_astnode($1);
if ($$.type == DMNSN_AST_NONE) {
dmnsn_delete_astnode($$);
YYERROR;
}
}
| COLOR ";" %dprec 1
| OBJECT
| TEXTURE
| PIGMENT
| FINISH
| INTERIOR
| CAMERA
| TRANSFORMATION
;
DECL_PARAMS: /* empty */ {
$$ = dmnsn_new_astnode(DMNSN_AST_MACRO, @$);
}
| DECL_PARAM_LIST
;
DECL_PARAM_LIST: IDENTIFIER {
$$ = dmnsn_new_astnode(DMNSN_AST_MACRO, @$);
dmnsn_array_push($$.children, &$1);
}
| DECL_PARAM_LIST "," IDENTIFIER {
$$ = $1;
dmnsn_array_push($$.children, &$3);
}
;
PARAMS: /* empty */ {
$$ = dmnsn_new_astnode(DMNSN_AST_ARRAY, @$);
}
| PARAM_LIST
;
PARAM_LIST: IDENTIFIER %dprec 2 {
$$ = dmnsn_new_astnode(DMNSN_AST_MACRO, @$);
dmnsn_array_push($$.children, &$1);
}
| PARAM %dprec 1 {
$$ = dmnsn_new_astnode(DMNSN_AST_MACRO, @$);
dmnsn_array_push($$.children, &$1);
}
| PARAM_LIST "," IDENTIFIER %dprec 2 {
$$ = $1;
dmnsn_array_push($$.children, &$3);
}
| PARAM_LIST "," PARAM %dprec 1 {
$$ = $1;
dmnsn_array_push($$.children, &$3);
}
;
PARAM: ARITH_EXPR %dprec 2 {
$$ = dmnsn_eval($1, symtable);
dmnsn_delete_astnode($1);
if ($$.type == DMNSN_AST_NONE) {
dmnsn_delete_astnode($$);
YYERROR;
}
}
| COLOR %dprec 1
| OBJECT
| TEXTURE
| PIGMENT
| FINISH
| INTERIOR
| CAMERA
| TRANSFORMATION
;
|
