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while and until loops support

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This commit is contained in:
BVK Chaitanya 2010-01-23 11:19:26 +05:30
parent 3babea95bb
commit 10523df478
5 changed files with 100 additions and 5 deletions
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35
script/parser.y
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@ -76,8 +76,9 @@
%token <arg> GRUB_PARSER_TOKEN_WORD "word"
%type <arglist> word argument arguments0 arguments1
%type <cmd> script_init script grubcmd ifcmd forcmd command
%type <cmd> commands1 menuentry statement
%type <cmd> script_init script
%type <cmd> grubcmd ifcmd forcmd whilecmd untilcmd
%type <cmd> command commands1 menuentry statement
%pure-parser
%lex-param { struct grub_parser_param *state };
@ -173,9 +174,11 @@ grubcmd: word arguments0
;
/* A single command. */
command: grubcmd { $$ = $1; }
| ifcmd { $$ = $1; }
| forcmd { $$ = $1; }
command: grubcmd { $$ = $1; }
| ifcmd { $$ = $1; }
| forcmd { $$ = $1; }
| whilecmd { $$ = $1; }
| untilcmd { $$ = $1; }
;
/* A list of commands. */
@ -250,3 +253,25 @@ forcmd: "for" "name"
grub_script_lexer_deref (state->lexerstate);
}
;
whilecmd: "while"
{
grub_script_lexer_ref (state->lexerstate);
}
commands1 delimiters1 "do" commands1 delimiters1 "done"
{
$$ = grub_script_create_cmdwhile (state, $3, $6, 0);
grub_script_lexer_deref (state->lexerstate);
}
;
untilcmd: "until"
{
grub_script_lexer_ref (state->lexerstate);
}
commands1 delimiters1 "do" commands1 delimiters1 "done"
{
$$ = grub_script_create_cmdwhile (state, $3, $6, 1);
grub_script_lexer_deref (state->lexerstate);
}
;