private static void WriteNestedExpression(this IndentedTextWriter writer, int parentPrecedence, BoundExpression expression)
{
if (expression is BoundUnaryExpression unary)
{
writer.WriteNestedExpression(parentPrecedence, SyntaxFacts.GetUnaryOperatorPrecedence(unary.Op.SyntaxKind), unary);
}
else if (expression is BoundBinaryExpression binary)
{
writer.WriteNestedExpression(parentPrecedence, SyntaxFacts.GetBinaryOperatorPrecedence(binary.Op.SyntaxKind), binary);
}
else
{
expression.WriteTo(writer);
}
}
private static void WriteNestedExpression(this IndentedTextWriter writer, int parentPrecedence, int currentPrecedence, BoundExpression expression)
{
var needsParenthesis = parentPrecedence >= currentPrecedence;
if (needsParenthesis)
{
writer.WritePunctuation(SyntaxKind.OpenParenthesisToken);
}
expression.WriteTo(writer);
if (needsParenthesis)
{
writer.WritePunctuation(SyntaxKind.CloseParenthesisToken);
}
}