protected bool Equals(ForeachNode other)
{
return(string.Equals(VariableName, other.VariableName) &&
Equals(IterableExpression, other.IterableExpression) &&
Equals(RangeStart, other.RangeStart) &&
Equals(RangeEnd, other.RangeEnd) &&
Equals(Body, other.Body));
}
/// <summary>
/// for_block = "for" identifier "in" line_expr [ ".." line_expr ] "do"
/// </summary>
private ForeachNode parseForHeader()
{
if (!check(LexemType.For))
return null;
var node = new ForeachNode();
node.VariableName = ensure(LexemType.Identifier, ParserMessages.VarIdentifierExpected).Value;
ensure(LexemType.In, ParserMessages.SymbolExpected, "in");
var iter = ensure(parseLineExpr, ParserMessages.SequenceExpected);
if (check(LexemType.DoubleDot))
{
node.RangeStart = iter;
node.RangeEnd = ensure(parseLineExpr, ParserMessages.RangeEndExpected);
}
else
{
node.IterableExpression = iter;
}
ensure(LexemType.Do, ParserMessages.SymbolExpected, "do");
return node;
}
protected bool Equals(ForeachNode other)
{
return string.Equals(VariableName, other.VariableName)
&& Equals(IterableExpression, other.IterableExpression)
&& Equals(RangeStart, other.RangeStart)
&& Equals(RangeEnd, other.RangeEnd)
&& Equals(Body, other.Body);
}