public static void Visit(this ICSharpPrintingVisitor visitor, CSharpPattern pattern)
{
switch (pattern.PatternType)
{
case CSharpPatternType.Constant:
visitor.Visit((ConstantCSharpPattern)pattern);
break;
case CSharpPatternType.Discard:
visitor.Out("_");
break;
case CSharpPatternType.Type:
visitor.Visit((TypeCSharpPattern)pattern);
break;
case CSharpPatternType.And:
case CSharpPatternType.Or:
visitor.Visit((BinaryCSharpPattern)pattern);
break;
case CSharpPatternType.Not:
visitor.Visit((NotCSharpPattern)pattern);
break;
case CSharpPatternType.LessThan:
case CSharpPatternType.LessThanOrEqual:
case CSharpPatternType.GreaterThan:
case CSharpPatternType.GreaterThanOrEqual:
visitor.Visit((RelationalCSharpPattern)pattern);
break;
case CSharpPatternType.Declaration:
visitor.Visit((DeclarationCSharpPattern)pattern);
break;
case CSharpPatternType.Var:
visitor.Visit((VarCSharpPattern)pattern);
break;
case CSharpPatternType.Recursive:
visitor.Visit((RecursiveCSharpPattern)pattern);
break;
case CSharpPatternType.ITuple:
visitor.Visit((ITupleCSharpPattern)pattern);
break;
case CSharpPatternType.List:
visitor.Visit((ListCSharpPattern)pattern);
break;
case CSharpPatternType.Slice:
visitor.Visit((SliceCSharpPattern)pattern);
break;
default:
break;
}
}
private static void ParenthesizedVisit(this ICSharpPrintingVisitor visitor, CSharpPattern parent, CSharpPattern nodeToVisit)
{
if (nodeToVisit.GetPrecedence() < parent.GetPrecedence())
{
visitor.Out("(");
visitor.Visit(nodeToVisit);
visitor.Out(")");
}
else
{
visitor.Visit(nodeToVisit);
}
}
private static void Visit(this ICSharpPrintingVisitor visitor, BinaryCSharpPattern pattern)
{
var op = pattern.PatternType switch
{
CSharpPatternType.And => " and ",
CSharpPatternType.Or => " or ",
_ => throw ContractUtils.Unreachable,
};
visitor.ParenthesizedVisit(pattern, pattern.Left);
visitor.Out(op);
visitor.ParenthesizedVisit(pattern, pattern.Right);
}
private static void Visit(this ICSharpPrintingVisitor visitor, NotCSharpPattern pattern)
{
visitor.Out("not ");
visitor.ParenthesizedVisit(pattern, pattern.Negated);
}
private static void Visit(this ICSharpPrintingVisitor visitor, ConstantCSharpPattern pattern)
{
visitor.VisitExpression(pattern.Value);
}
