private ScopeExpression(Token token, Scopes.Scope scope, Nodes.Node root, Nodes.Node subscope) : base(token, scope, root)
{
DefiningToken = token;
Root = root;
Subscope = subscope;
Scope = new Scopes.Scope(scope);
}
public static ScopeExpression Parse(Scopes.Scope scope, Token[] tokens, Nodes.Node subscope)
{
if (tokens.Length < 1)
{
return(null);
}
var t0 = tokens.FirstOrDefault();
switch (t0.Value)
{
case "while": {
var conditionExpressionBegin = 1;
var conditionExpressionEnd = ParserHelper.FindClosingScope(tokens, conditionExpressionBegin);
if (conditionExpressionEnd < 0)
{
throw new Exceptions.UnexpectedTokenException(tokens[1]);
}
return(new ScopeExpression(
tokens[1],
scope,
new Nodes.WhileLoopNode(
tokens[1],
scope,
Expression.Parse(
scope,
tokens.Skip(conditionExpressionBegin + 1).Take(conditionExpressionEnd - conditionExpressionBegin - 1).ToArray()
)
),
subscope
));
}
case "if": {
var conditionExpressionBegin = 1;
var conditionExpressionEnd = ParserHelper.FindClosingScope(tokens, conditionExpressionBegin);
if (conditionExpressionEnd < 0)
{
throw new Exceptions.UnexpectedTokenException(tokens[1]);
}
return(new ScopeExpression(
tokens[1],
scope,
new Nodes.Conditional.IfConditionNode(
tokens[1],
scope,
Expression.Parse(
scope,
tokens.Skip(conditionExpressionBegin + 1).Take(conditionExpressionEnd - conditionExpressionBegin - 1).ToArray()
)
),
subscope
));
}
default:
throw new Exceptions.UnexpectedTokenException(t0);
}
}
