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CommandParser Class Reference

base class used to parse command More...

#include <cparser.h>

Inheritance diagram for CommandParser:

Evalstring KEY_driver_in KEY_string_in Line_Parser List of all members.

Public Methods

bool GetCommand ()
 read one command from the buffer

bool FlushArg ()
 flush command buffer

wxString GetErrorMes ()
 get the error message if parsing went wrong

bool GetEnv (const wxString &envname, wxString &envstring)
 get environment variable

DL_List< const wxString * > * GetArgList ()
 list of command arguments found

DL_Iter< const wxString * > * GetArgIter ()
 iterator to traverse the list of command arguments found

wxString GetCommandParsed ()
 get the parses command


Detailed Description

base class used to parse command

strings according to the BNF below.

See also:
Evalstring , Line_Parser

Below you can see the Bachus Naur representation of the enhanced parser:

<commands>                      ::= [<blanks>]
                      {         { <command> }*
                      }

<command>                       ::= [<blanks>] {<comment> | {<word> {<blanks> | <endcommand}}* }*

<endcommand>    ::=  {';' | '\n' | '\0' }

<word>                          ::=  { <quotedstring> | <bracedstring> | <multipartword> }

<quotedstring>          ::= ('"') {CHAR | '\"' | '\\n' | aliasref | envref }* ('"')

<bracedstring>          ::= ('{') {CHAR | '\{' | '\}' | '\\n'}* ('}')

<multipartword> ::=  { <aliasref> | <envref> | {CHAR | '\\n'}* }*

<aliasref>                      ::= ('%') { <name> <blank> | ('{') <name> ('}') }

<envref>                                ::= ('$') { <name> <blank> | ('{') <name> ('}') }

<name>                          ::= { LETTER | DIGIT | UNDERSCORE | MINUS }*

<blanks>                        ::= { TAB | SPACE | '\\n'}*

<comment>               ::= # {CHAR}* ('\0')

note:
        [ ]     entity CAN occur zero or more times
        ( )     entity MUST occur
        { }     pick one of the entities within the braces
        { }*    entities within the braces CAN occur zero ore more times
        { }+    entities within the braces MUST occur one ore more times
         |              OR


The documentation for this class was generated from the following file: CommandParser class Reference -- Thu Nov 28 21:24:57 2002 -- 28 Nov 2002 -- 1.2.18 -- -- . -- Main Page