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|
%pure-parser
%name-prefix "tmpl_expr_parser_"
%defines
%error-verbose
%parse-param { TmplExprParser *parser }
%lex-param { void *scanner }
%{
# include <glib/gprintf.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include "tmpl-expr.h"
# include "tmpl-expr-private.h"
# include "tmpl-expr-parser-private.h"
#pragma GCC diagnostic ignored "-Wswitch-default"
%}
%union {
TmplExpr *a; /* ast node */
double d; /* number */
char *s; /* symbol/string */
GPtrArray *sl; /* symlist */
TmplExprBuiltin fn; /* builtin call */
int b; /* boolean */
int cmp; /* comparison */
}
%{
int tmpl_expr_parser_lex (YYSTYPE *, void *scanner);
void
tmpl_expr_parser_error (TmplExprParser *parser,
const gchar *message)
{
g_assert (parser != NULL);
g_assert (message != NULL);
g_clear_pointer (&parser->ast, tmpl_expr_unref);
g_free (parser->error_str);
parser->error_str = g_strdup (message);
}
# define scanner parser->scanner
%}
%token <s> REQUIRE VERSION
%token <b> BOOL
%token <d> NUMBER
%token <s> NAME STRING_LITERAL
%token <fn> BUILTIN
%token EOL
%token IF THEN ELSE WHILE DO FUNC
%nonassoc <cmp> CMP
%right '='
%left '+' '-'
%left '*' '/'
%nonassoc '|' UMINUS
%type <a> exp stmt list explist
%type <sl> symlist
%start expr
%%
expr: /* nothing */ EOL {
parser->ast = NULL;
YYACCEPT;
}
| stmt EOL {
parser->ast = $1;
YYACCEPT;
}
| FUNC NAME '(' symlist ')' '=' list EOL {
/* todo: add ast node to define the expr on the scope
* when evaluated.
*/
//tmpl_scope_add_user_func (parser->scope, $2, $4, $7);
parser->ast = NULL;
YYACCEPT;
}
| FUNC NAME '(' ')' '=' list EOL {
/* todo: add ast node to define the expr on the scope
* when evaluated.
*/
//tmpl_scope_add_user_func (parser->scope, $2, NULL, $6);
parser->ast = NULL;
YYACCEPT;
}
;
stmt: IF exp THEN list {
$$ = tmpl_expr_new_flow (TMPL_EXPR_IF, $2, $4, NULL);
}
| IF exp THEN list ELSE list {
$$ = tmpl_expr_new_flow (TMPL_EXPR_IF, $2, $4, $6);
}
| WHILE exp DO list {
$$ = tmpl_expr_new_flow (TMPL_EXPR_WHILE, $2, $4, NULL);
}
| exp
;
list: /* nothing */ { $$ = NULL; }
| stmt ';' list {
if ($3 == NULL)
$$ = $1;
else
$$ = tmpl_expr_new_simple (TMPL_EXPR_STMT_LIST, $1, $3);
}
;
exp: exp CMP exp {
$$ = tmpl_expr_new_simple ($2, $1, $3);
}
| exp '+' exp {
$$ = tmpl_expr_new_simple (TMPL_EXPR_ADD, $1, $3);
}
| exp '-' exp {
$$ = tmpl_expr_new_simple (TMPL_EXPR_SUB, $1, $3);
}
| exp '*' exp {
$$ = tmpl_expr_new_simple (TMPL_EXPR_MUL, $1, $3);
}
| exp '/' exp {
$$ = tmpl_expr_new_simple (TMPL_EXPR_DIV, $1, $3);
}
| '(' exp ')' {
$$ = $2;
}
| '-' exp %prec UMINUS {
$$ = tmpl_expr_new_simple (TMPL_EXPR_UNARY_MINUS, $2, NULL);
}
| NUMBER {
$$ = tmpl_expr_new_number ($1);
}
| BOOL {
$$ = tmpl_expr_new_boolean ($1);
}
| STRING_LITERAL {
$$ = tmpl_expr_new_string ($1+1, strlen($1) - 2);
}
| NAME {
$$ = tmpl_expr_new_symbol_ref ($1);
}
| NAME '=' exp {
$$ = tmpl_expr_new_symbol_assign ($1, $3);
}
| exp '.' NAME '(' ')' {
$$ = tmpl_expr_new_gi_call ($1, $3, NULL);
}
| exp '.' NAME '(' explist ')' {
$$ = tmpl_expr_new_gi_call ($1, $3, $5);
}
| exp '.' NAME {
$$ = tmpl_expr_new_getattr ($1, $3);
}
| exp '.' NAME '=' exp {
$$ = tmpl_expr_new_setattr ($1, $3, $5);
}
| BUILTIN '(' explist ')' {
$$ = tmpl_expr_new_fn_call ($1, $3);
}
| NAME '(' explist ')' {
$$ = tmpl_expr_new_user_fn_call ($1, $3);
}
| NAME '(' ')' {
$$ = tmpl_expr_new_user_fn_call ($1, NULL);
}
| '!' exp {
$$ = tmpl_expr_new_invert_boolean ($2);
}
| REQUIRE NAME {
$$ = tmpl_expr_new_require ($2, NULL);
}
| REQUIRE NAME VERSION STRING_LITERAL {
char *vstr = g_strndup ($4+1, strlen($4)-2);
$$ = tmpl_expr_new_require ($2, vstr);
g_free (vstr);
}
;
explist: exp
| exp ',' explist {
$$ = tmpl_expr_new_simple (TMPL_EXPR_STMT_LIST, $1, $3);
}
;
symlist: NAME {
$$ = g_ptr_array_new_with_free_func (g_free);
g_ptr_array_add ($$, $1);
}
| NAME ',' symlist {
g_ptr_array_insert ($3, 0, $1);
}
;
|
