public void Can_Evaluate_Assignments()
{
var assignment = "x = (2 + 2) * 5";
var parseResult = _engine.ParseString(assignment);
Assert.IsTrue(parseResult.IsAssignmentResult);
Assert.AreEqual("x", (parseResult as AssignmentResult).Item.Variable);
Assert.AreEqual(20, _engine.EvaluateExpression <int>((parseResult as AssignmentResult).Item.Expression));
}
private void ParseStatement(string statement)
{
ParseResult parseResult = null;
try
{
parseResult = _engine.ParseString(statement);
}
catch { throw new ParseException(statement); }
switch (parseResult)
{
case AssignmentResult assignment:
_id = assignment.Item.Variable;
_expression = assignment.Item.Expression;
break;
default:
throw new ParseException($"Statement {statement} is not an assignment statement. Cannot use Expressions directly.");
}
}