internal static bool TryParse(Node parent, Queue<Word> remainingWords, out Colour colour)
{
if (!remainingWords.Peek().Text.StartsWith("#"))
{
colour = null;
return false;
}
var word = remainingWords.Dequeue();
colour = new Colour(parent) { Text = word.Text };
return true;
}
public void DoesDoVariableExample()
{
var host = new Host();
var source =
@"$blue: #3bbfce;
$margin: 16px;
.content-navigation {
border-color: $blue;
color:
darken($blue, 9%);
}
.border {
padding: $margin / 2;
margin: $margin / 2;
border-color: $blue;
}
";
var expected =
@".content-navigation {
border-color: #3bbfce;
color: #2b9eab;
}
.border {
padding: 8px;
margin: 8px;
border-color: #3bbfce;
}
";
var result = host.Execute(source,
(string name, Parameters parameters, out Node node) =>
{
node = new Colour(parameters.Parent) { Text = "#2b9eab" };
return true;
});
Assert.AreEqual(expected, result);
}
internal static bool TryParse(Node parent, Queue <Word> remainingWords, out Expression expression)
{
expression = new Expression(parent);
while (remainingWords.Count > 0 &&
remainingWords.Peek().Text != ";" &&
remainingWords.Peek().Text != "," &&
remainingWords.Peek().Text != ")" &&
remainingWords.Peek().Text != "}")
{
Add add;
if (Add.TryParse(expression, remainingWords, out add))
{
expression.Children.Add(add);
}
Subtract subtract;
if (Subtract.TryParse(expression, remainingWords, out subtract))
{
expression.Children.Add(subtract);
}
Multiply multiply;
if (Multiply.TryParse(expression, remainingWords, out multiply))
{
expression.Children.Add(multiply);
}
Divide divide;
if (Divide.TryParse(expression, remainingWords, out divide))
{
expression.Children.Add(divide);
}
Variable variable;
if (Variable.TryParse(expression, remainingWords, out variable))
{
expression.Children.Add(variable);
continue;
}
Colour colour;
if (Colour.TryParse(expression, remainingWords, out colour))
{
expression.Children.Add(colour);
continue;
}
Units unit;
if (Units.TryParse(expression, remainingWords, out unit))
{
expression.Children.Add(unit);
continue;
}
MethodCall methodCall;
if (MethodCall.TryParse(expression, remainingWords, out methodCall))
{
expression.Children.Add(methodCall);
continue;
}
if (remainingWords.Count > 0)
{
var namedValue = new NamedValue(expression)
{
Text = remainingWords.Dequeue().Text
};
expression.Children.Add(namedValue);
}
}
return(true);
}