public ParseRule(Condition result, ParseRuleCollapsableLevel collapsableLevel, params List <Condition>[] requiredTokens)
: this()
{
Contract.Requires(requiredTokens != null);
Result = result.Token;
CollapsableLevel = collapsableLevel;
RequiredTokens = new Condition[requiredTokens.Length][];
for (int i = 0; i < requiredTokens.Length; i++)
{
RequiredTokens[i] = new Condition[requiredTokens[i].Count];
for (int j = 0; j < requiredTokens[i].Count; j++)
{
RequiredTokens[i][j] = requiredTokens[i][j];
}
}
}
private bool MatchCondition(Condition token, int sourceOffset, Condition[] alternative, ParseRuleCollapsableLevel collapsableLevel,
ref AstNode node, ref int tokensConsumed)
{
var lookupTokensConsumed = 0;
AstNode matchedNode = Match(sourceOffset + tokensConsumed, alternative, ref lookupTokensConsumed);
if (matchedNode.IsNull)
{
return(false);
}
else
{
var childrenCount = matchedNode.ChildrenCount;
if (collapsableLevel == ParseRuleCollapsableLevel.Always ||
(collapsableLevel == ParseRuleCollapsableLevel.OneChild && childrenCount == 1))
{
for (int i = 0; i < childrenCount; i++)
{
node.AddChild(m_RootNode, matchedNode.Children[i]);
}
}
else
{
matchedNode.Type = token.Token;
node.AddChild(m_RootNode, matchedNode);
}
tokensConsumed += lookupTokensConsumed;
LastMatched = tokensConsumed;
return(true);
}
}
