Aardvark 736: grammatically accept zero or more Shell commands

http://austingroupbugs.net/view.php?id=736

An empty Shell program and a program consisting of two or more commands separated with NEWLINE tokens are valid Shell scripts. However, Shell Grammar Rules only accept exactly one single command which results in a syntax error against zero commands and two or more commands separated with NEWLINE tokens.

Desired Action

On page 2350, lines 74801-74808, change

%start  complete_command
%%
complete_command : list separator
                 | list
                 ;

to

%start script
%%
script           : commands linebreak
                 | /* empty */
                 ;
commands         : commands newline_list complete_command
                 |                       complete_command
                 ;
complete_command : list separator_op
                 | list
                 ;

Aardvark 737: two of Shell Grammar Rules unnecessary

http://austingroupbugs.net/view.php?id=737

Shell Grammar Rules for compound_list duplicate the definition of linebreak

linebreak        : newline_list
                 | /* empty */
                 ;

which results in four grammar rules for compound_list instead of two.

Desired Action

On page 2350, lines 74834-74838, change

compound_list    :              term
                 | newline_list term
                 |              term separator
                 | newline_list term separator
                 ;

to

compound_list    : linebreak term
                 | linebreak term separator
                 ;