antlr - Antlr4 mutual left recursion error -

i prepared grammar mini language creating, getting mutual left recursion error between var , functioncall

var : name | var '[' exp ']' | var '.' var | functioncall '.' var ; functioncall : name '(' (exp)? (',' exp)* ')' | var '.' functioncall | functioncall '.' functioncall ; 

specifically @ var : functioncall '.' functioncall , functioncall : var '.' functioncall corresponds somefunction().var , instanceofclass.function().

is there way can achieve this?

edit : grammar should allow var '=' exp var can instance.var or function().var

antlr 4 (and not before that) can handle both-side recursion in same rule. like

expr: expr '+' expr | number 

is valid.

so can put new rule abstract either var or function call.

value : var | functioncall | value '.' value ;  var : name | var '[' exp ']' ;  functioncall : name '(' exp? (',' exp)* ')' ; 

not grammar simpler parse (to human readers), have no mutual recursion.

note: untested.