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|
%{
/* This file is part of Eclat.
Copyright (C) 2012 Sergey Poznyakoff.
Eclat is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Eclat is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Eclat. If not, see <http://www.gnu.org/licenses/>. */
#include "libeclat.h"
#include <grecs.h>
#include <grecs-locus.h>
#include "forlangrm.h"
#include "forlan.h"
static int yyerror(char *);
union forlan_node *forlan_parse_tree;
%}
%error-verbose
%locations
%union {
char *string;
union forlan_node *node;
struct grecs_list *list;
};
%token <string> STRING IDENT
%token LAST IF ELSE
%left OR
%left AND
%left NOT
%type <node> stmt stmt_cond stmt_expr stmt_blk cond bool node comp funcall arg
%type <list> stmtlist complist arglist
%type <string> string
%%
input : stmtlist
{
forlan_parse_tree = forlan_stmt_from_list($1);
}
;
stmtlist : stmt
{
$$ = forlan_stmt_list();
grecs_list_append($$, $1);
}
| stmtlist stmt
{
grecs_list_append($1, $2);
$$ = $1;
}
;
stmt : stmt_cond
| stmt_expr
| stmt_blk
;
stmt_blk : '{' stmtlist '}'
{
$$ = forlan_stmt_from_list($2);
}
;
stmt_cond : IF cond stmt
{
$$ = forlan_node_create(forlan_type_cond);
$$->cond.expr = $2;
$$->cond.iftrue = $3;
$$->cond.iffalse = NULL;
}
| IF cond stmt ELSE stmt
{
$$ = forlan_node_create(forlan_type_cond);
$$->cond.expr = $2;
$$->cond.iftrue = $3;
$$->cond.iffalse = $5;
}
;
cond : bool
;
bool : node
{
$$ = forlan_node_create(forlan_type_expr);
$$->expr.opcode = forlan_opcode_node;
$$->expr.arg[0] = $1;
}
| bool AND bool
{
$$ = forlan_node_create(forlan_type_expr);
$$->expr.opcode = forlan_opcode_and;
$$->expr.arg[0] = $1;
$$->expr.arg[1] = $3;
}
| bool OR bool
{
$$ = forlan_node_create(forlan_type_expr);
$$->expr.opcode = forlan_opcode_or;
$$->expr.arg[0] = $1;
$$->expr.arg[1] = $3;
}
| NOT bool
{
$$ = forlan_node_create(forlan_type_expr);
$$->expr.opcode = forlan_opcode_not;
$$->expr.arg[0] = $2;
}
| '(' bool ')'
{
$$ = $2;
}
;
node : complist
{
$$ = forlan_node_create(forlan_type_comp);
$$->comp.abs = 0;
$$->comp.node = forlan_stmt_from_list($1);
}
| '.' complist
{
$$ = forlan_node_create(forlan_type_comp);
$$->comp.abs = 1;
$$->comp.node = forlan_stmt_from_list($2);
}
| LAST
{
$$ = forlan_node_create(forlan_type_last);
}
;
complist : comp
{
$$ = forlan_stmt_list();
grecs_list_append($$, $1);
}
| complist '.' comp
{
grecs_list_append($1, $3);
$$ = $1;
}
;
comp : IDENT
{
$$ = forlan_node_create(forlan_type_lit);
$$->lit.string = $1;
}
| IDENT '[' string ']'
{
$$ = forlan_node_create(forlan_type_test);
$$->test.comp = $1;
$$->test.value = $3;
}
| funcall
;
string : IDENT
| STRING
;
funcall : IDENT '(' ')'
{
$$ = forlan_node_create(forlan_type_func);
$$->func.fp = $1; //FIXME
$$->func.args = NULL;
}
| IDENT '(' arglist ')'
{
$$ = forlan_node_create(forlan_type_func);
$$->func.fp = $1; //FIXME
$$->func.args = $3;
}
;
arglist : arg
{
$$ = forlan_stmt_list();
grecs_list_append($$, $1);
}
| arglist ',' arg
{
grecs_list_append($1, $3);
$$ = $1;
}
;
arg : node
| STRING
{
$$ = forlan_node_create(forlan_type_lit);
$$->lit.string = $1;
}
;
stmt_expr : funcall ';'
;
%%
static int
yyerror(char *s)
{
grecs_error(&yylloc, 0, "%s", s);
return 0;
}
int
forlan_parser()
{
yydebug = debug_level(forlan_dbg) >= FORLAN_DBG_GRAM;
return yyparse();
}
int
forlan_parse(const char *input, size_t length, struct grecs_locus_point *pt)
{
int rc;
forlan_lex_begin(input, length, pt);
rc = forlan_parser();
forlan_lex_end();
return rc;
}
|
