Incorrect handling of negative numbers in functions

[Bagolly]

Issue

• Negative numbers in functions are handled incorrectly, unless they are the first parameter in a function call.
• The negative sign is turned into a subtraction operator in this case.

Reproduce:

• Define a custom function with at least 2 parameters:

       Function myFunc = new( "myFunc", new[] { "x", "y" }, "x * y")

• Call the function in any expression, with an argument, other than the first having a negative value:

       Evaluator evaluator = new( new List<Function>() { myFunc  } )
       evaluator.Evalute("myFunc(2, -3)");

  Behavior

  • Expected: Evaluate the result of 2 * -3 and return -6
  • Actual: Evaluated using only the first parameter, treating the second argument as a subtraction, instead of a negative number.

[Bagolly]

The cause was a missing check for the token type ArgumentSeparator in Tokenizer.cs, fixed in 2ae1c3d.