returns an expression after parsing the input . may fail in case of a syntax error . should be called once per instance . concode_field_sep Token tok concode_elem_sep String sample concode_elem_sep Scanner lex concode_field_sep void expected concode_elem_sep void match concode_elem_sep Expression expr concode_elem_sep Expression term concode_elem_sep void main concode_elem_sep void error concode_elem_sep Expression factor
Expression function ( ) { tok = lex . nextToken ( ) ; Expression loc0 = expr ( ) ; match ( Token . EOF ) ; return loc0 ; }