private void MatchAttributes(LNode pattern, LNode candidate)
{
LNode condition;
bool isParams, refExistingVar;
Symbol listVar;
var pAttrs = pattern.PAttrs();
if (pAttrs.Count == 1 && (listVar = DecodeSubstitutionExpr(pAttrs[0], out condition, out isParams, out refExistingVar)) != null && isParams)
{
if (listVar != __ || condition != null)
{
if (!refExistingVar)
{
AddVar(listVar, true, errAt: pattern);
}
Tests.Add(LNode.Call(CodeSymbols.OrBits, LNode.List(LNode.Call(CodeSymbols.Dot, LNode.List(LNode.Call(LNode.List(LNode.InParensTrivia), CodeSymbols.Assign, LNode.List(F.Id(listVar), LNode.Call(CodeSymbols.Dot, LNode.List(candidate, LNode.Id((Symbol)"Attrs"))).SetStyle(NodeStyle.Operator))).SetStyle(NodeStyle.Operator), LNode.Id((Symbol)"IsEmpty"))).SetStyle(NodeStyle.Operator), LNode.Literal(true))).SetStyle(NodeStyle.Operator));
if (condition != null)
{
Tests.Add(condition);
}
}
}
else if (pAttrs.Count != 0)
{
Context.Sink.Error(pAttrs[0], "Currently, Attribute matching is very limited; you can only use `[$(...varName)]`");
}
}
private void MatchAttributes(LNode pattern, LNode candidate)
{
LNode condition;
bool isParams, refExistingVar;
Symbol listVar;
var pAttrs = pattern.PAttrs();
if (pAttrs.Count == 1 && (listVar = GetSubstitutionVar(pAttrs[0], out condition, out isParams, out refExistingVar)) != null && isParams) {
if (listVar != __ || condition != null) {
if (!refExistingVar)
AddVar(listVar, true, errAt: pattern);
Tests.Add(LNode.Call(CodeSymbols.OrBits, LNode.List(LNode.Call(CodeSymbols.Dot, LNode.List(LNode.Call(LNode.List(LNode.InParensTrivia), CodeSymbols.Assign, LNode.List(F.Id(listVar), LNode.Call(CodeSymbols.Dot, LNode.List(candidate, LNode.Id((Symbol) "Attrs"))))).SetStyle(NodeStyle.Operator), LNode.Id((Symbol) "IsEmpty"))), LNode.Literal(true))).SetStyle(NodeStyle.Operator));
if (condition != null)
Tests.Add(condition);
}
} else if (pAttrs.Count != 0)
Context.Sink.Write(Severity.Error, pAttrs[0], "Currently, Attribute matching is very limited; you can only use `[$(...varName)]`");
}