internal static bool TryParse(Node parent, Queue <Word> remainingWords, out IncludeDirective directive)
{
directive = null;
if (remainingWords.Peek().Text != "@include")
{
return(false);
}
directive = new IncludeDirective(parent);
// remove '@include'
remainingWords.Dequeue();
Expression expression;
if (!Expression.TryParse(directive, remainingWords, out expression))
{
throw new Exception("errp?");
}
// remove ';'
if (remainingWords.Peek().Text == ";")
{
remainingWords.Dequeue();
}
directive.Name = expression;
return(true);
}
internal static bool TryParse(Node parent, Queue <Word> remainingWords, out Parameters parameters)
{
if (remainingWords.Count == 0 ||
remainingWords.Peek().Text != "(")
{
parameters = null;
return(false);
}
remainingWords.Dequeue();
parameters = new Parameters(parent);
while (remainingWords.Peek().Text != ")")
{
if (remainingWords.Peek().Text == ",")
{
remainingWords.Dequeue();
continue;
}
Expression expression;
if (Expression.TryParse(parent, remainingWords, out expression))
{
parameters.Children.Add(expression);
continue;
}
}
remainingWords.Dequeue();
return(true);
}
internal static bool TryParse(Node parent, Queue <Word> remainingWords, out ExtendDirective directive)
{
directive = null;
if (remainingWords.Peek().Text != "@extend")
{
return(false);
}
directive = new ExtendDirective(parent);
directive.Name = remainingWords.Dequeue().Text.Substring(1);
Expression expression;
if (!Expression.TryParse(directive, remainingWords, out expression))
{
throw new Exception("errp?");
}
// remove ';'
if (remainingWords.Peek().Text == ";")
{
remainingWords.Dequeue();
}
directive.Value = expression;
return(true);
}
internal static bool TryParse(Node parent, Queue <Word> remainingWords, out PropertyAssignment property)
{
if (remainingWords.Skip(1).First().Text != ":")
{
property = null;
return(false);
}
property = new PropertyAssignment(parent);
property.Name = remainingWords.Dequeue().Text;
// remove ':'
remainingWords.Dequeue();
Block block;
if (Block.TryParse(property, remainingWords, out block))
{
property.Value = block;
return(true);
}
Expression expression;
if (Expression.TryParse(property, remainingWords, out expression))
{
property.Value = expression;
// remove ';'
if (remainingWords.Peek().Text == ";")
{
remainingWords.Dequeue();
}
return(true);
}
property = null;
return(false);
}
internal static bool TryParse(Node parent, Queue <Word> remainingWords, out MixinDefinition definition)
{
definition = null;
if (remainingWords.Peek().Text != "@mixin")
{
return(false);
}
definition = new MixinDefinition(parent);
// remove '@mixin'
remainingWords.Dequeue();
var remainingNameWords = new Queue <Word>();
while (remainingWords.Peek().Text != "{")
{
remainingNameWords.Enqueue(remainingWords.Dequeue());
}
Expression name;
if (!Expression.TryParse(definition, remainingNameWords, out name))
{
throw new Exception("errp?");
}
definition.Name = name;
Block block;
if (!Block.TryParse(definition, remainingWords, out block))
{
throw new Exception("erh?");
}
definition.Value = block;
return(true);
}
