private ForStatementSyntax CollectionIndexLoop(
string comparisonKindKey,
ExpressionSyntax left,
ExpressionSyntax right)
{
// The name of the index variable used in the loop over elements.
string indexVarName = _localVariableNameGenerator.GetNextLoopIndexVariableName();
// The two elements that will be compared each time through the loop.
ExpressionSyntax leftElement =
SyntaxFactory.ElementAccessExpression(
left,
SyntaxHelper.BracketedArgumentList(
SyntaxFactory.IdentifierName(indexVarName)));
ExpressionSyntax rightElement =
SyntaxFactory.ElementAccessExpression(
right,
SyntaxHelper.BracketedArgumentList(
SyntaxFactory.IdentifierName(indexVarName)));
// From the type of the element (primitive, object, list, or dictionary), create
// the appropriate comparison, for example, "a == b", or "Object.Equals(a, b)".
string elmentComparisonTypeKey = PropertyInfoDictionary.MakeElementKeyName(comparisonKindKey);
StatementSyntax comparisonStatement = GeneratePropertyComparison(elmentComparisonTypeKey, leftElement, rightElement);
return(SyntaxFactory.ForStatement(
SyntaxFactory.VariableDeclaration(
SyntaxFactory.ParseTypeName(WellKnownTypeNames.Int),
SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.VariableDeclarator(
SyntaxFactory.Identifier(indexVarName),
default(BracketedArgumentListSyntax),
SyntaxFactory.EqualsValueClause(
SyntaxFactory.LiteralExpression(
SyntaxKind.NumericLiteralExpression,
SyntaxFactory.Literal(0)))))),
SyntaxFactory.SeparatedList <ExpressionSyntax>(),
SyntaxFactory.BinaryExpression(
SyntaxKind.LessThanExpression,
SyntaxFactory.IdentifierName(indexVarName),
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
left,
SyntaxFactory.IdentifierName(CountPropertyName))),
SyntaxFactory.SingletonSeparatedList <ExpressionSyntax>(
SyntaxFactory.PrefixUnaryExpression(
SyntaxKind.PreIncrementExpression,
SyntaxFactory.IdentifierName(indexVarName))),
SyntaxFactory.Block(comparisonStatement)));
}