fetch numeric value of token , provided it 's a number . concode_field_sep int BOOLEAN_KIND concode_elem_sep double number concode_elem_sep String symbol concode_elem_sep int SYMBOL_KIND concode_elem_sep boolean bool concode_elem_sep int kind concode_elem_sep int NUMBER_KIND concode_elem_sep int PROCEDURE_KIND concode_elem_sep List<Token> procedure concode_field_sep boolean isBoolean concode_elem_sep boolean isSymbol concode_elem_sep int kind concode_elem_sep boolean isNumber concode_elem_sep boolean equals concode_elem_sep List<Token> getProcedure concode_elem_sep boolean getBoolean concode_elem_sep String toString concode_elem_sep boolean isProcedure concode_elem_sep String getSymbol
double function ( ) { Assert . pre ( isNumber ( ) , "srini_string" ) ; return number ; }