Examples of expr.Parser.allow()

expr.Parser.allow()
Adjust the set of allowed variables: create it (if not yet existent) and add optVariable (if it's nonnull). If the allowed-variable set exists, the parser will reject input strings that use any other variables. @param optVariable the variable to be allowed, or null

    }


    private Curve parseFofX(String text, Color color) throws SyntaxException {
  Variable x = Variable.make("x");
  Parser parser = new Parser();
  parser.allow(x);
  return new FunctionOfX(canvas, color, x, parser.parseString(text));
    }
}

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