====== Beschreibung der Syntax ======
|<program>  |:=  |<definition> { <definition> }  |
|  |  ;  |  |
|<definition>  |:=  |<ftype> ident ' (' <paramlist> ')' <compound>  |
|  |  ''|''  |<ftype> ident ' (' ')' <compound>  |
|  |  ''|''  |<vardefinition>  |
|  |  ;  |  |
|<ftype>  |:=  |'int' ''|'' 'float' ''|'' 'text'  |
|  |  ;  |  |
|ident  |:=  |[a-zA-Z][_a-zA-Z0-9]*  |
|  |  ;  |  |
|<paramlist>  |:=  |{ <type> ident { ',' <type> ident } }  |
|  |  ;  |  |
|<compound>  |:=  |'{' { <type> ident ';' } { <statement> } '}'  |
|  |  ;  |  |
|<type>  |:=  |<ftype>  |
|  |  ''|''  |'mask' ident  |
|  |  ;  |  |
|<statement>  |:=  |'while' ' (' <expr> ')' '{' <statement> { <statement> } '}'  |
|  |  ''|''  |'for' ' (' <expr> ';' <expr> ';' <expr> ')'\\  '{' <statement> { <statement> } '}'  |
|  |  ''|''  |'{' <statement> { <statement> } '}'\\ '{' <statement> { <statement> } '}'\\ [ 'else' '{' <statement> { <statement> } '}' ]  |
|  |  ''|''  |'return' <expr> ';'  |
|  |  ''|''  |'break' ';'  |
|  |  ''|''  |'continue' ';'  |
|  |  ''|''  |';'  |
|  |  ;  |  |
|<expr>  |:=  |<binary>  |
|  |  ;  |  |
|<binary>  |:=  |<binary> '=' <binary>  |
|  |  ''|''  | <binary> ''||'' <binary>  |
|  |  ''|''  | <binary> ''&&'' <binary>  |
|  |  ''|''  | <binary> ''=='' <binary>  |
|  |  ''|''  | <binary> ''!='' <binary>  |
|  |  ''|''  | <binary> ''<'' <binary>  |
|  |  ''|''  | <binary> ''<='' <binary>  |
|  |  ''|''  | <binary> ''>'' <binary>  |
|  |  ''|''  | <binary> ''>='' <binary>  |
|  |  ''|''  | <binary> ''+'' <binary>  |
|  |  ''|''  | <binary> ''-'' <binary>  |
|  |  ''|''  | <binary> ''*'' <binary>  |
|  |  ''|''  | <binary> ''/'' <binary>  |
|  |  ''|''  | <binary> ''%'' <binary>  |
|  |  ''|''  | <unary>  |
|  |  ;  |  |
|<unary>  |:=  |'++' <unary>  |
|  |  ''|''  | ''-''''-'' <unary>  |
|  |  ''|''  |'-' <primary>  |
|  |  ''|''  |'!' <primary>  |
|  |  ''|''  |<primary>  |
|  |  ;  |  |
|<primary>  |:=  |[0-9]*.[0-9]+ (Dezimalzahl in Punktnotation)  |
|  |  ''|''  |[0-9]+ (Ganzzahl)  |
|  |  ''|''  |Zeichenkette (in der Form "........")  |
|  |  ''|''  |' (' <expr> ')'  |
|  |  ''|''  |'curcell'  |
|  |  ''|''  |'globalvector' '[' <primary> ']'  |
|  |  ''|''  |ident '.' ident  |
|  |  ''|''  |ident '.' ident '.' 'i' ''|'' 'o' ''|'' 's' ''|'' 'm'  |
|  |  ''|''  |<primary> '[' <expr> ']'  |
|  |  ''|''  |ident ' (' { <binary> { ',' <binary> } } ')'  |
|  |  ;  |  |