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Материал из Вики проекта PascalABC.NET
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progr: | progr OperatorSequence ;
Operator: def | assign | if | while | OutPut | BOperator ;
BOperator: BEGIN OperatorSequense END ;
OperatorSequense: | Operatorsequense operator ;
def: ident varlist SEMICOLUMN ;
varlist: ident | varlist COMMA ident ;
assgin: ident ASS expr SEMICOLUMN ;
expr : ident | INTNUM | REALNUM | TRUE | FALSE | MINUS expr %prec UMINUS | LB expr RB | expr PLUS expr | expr MINUS expr | expr MULT expr | expr DIVIDE expr | expr EQ expr | expr NE expr | expr LT expr | expr LE expr | expr GT expr | expr GE expr ;
operand: ident | const ;
const : intConst | realCOnst
if: IF LB expr RB operator elsepart ;
elsepart: | operator
while: WHILE LB expr RB operator