internal LiteralExpressionSyntax ToStringLiteralExpression()
{
ThrowInvalidOperationIfNotInitialized();
StringConcatenationAnalysis analysis = Analyze();
ThrowIfContainsNonStringLiteralExpression(analysis);
StringBuilder sb = StringBuilderCache.GetInstance();
if (!analysis.ContainsNonVerbatimExpression)
{
sb.Append('@');
}
sb.Append('"');
foreach (ExpressionSyntax expression in Expressions(leftToRight: true))
{
StringLiteralExpressionInfo literal = SyntaxInfo.StringLiteralExpressionInfo(expression);
if (literal.Success)
{
if (analysis.ContainsNonVerbatimExpression && literal.IsVerbatim)
{
int startIndex = sb.Length;
sb.Append(literal.ValueText);
sb.Replace(@"\", @"\\", startIndex);
sb.Replace("\"", @"\" + "\"", startIndex);
sb.Replace("\n", @"\n", startIndex);
sb.Replace("\r", @"\r", startIndex);
}
else
{
sb.Append(literal.InnerText);
}
}
}
sb.Append('"');
return((LiteralExpressionSyntax)ParseExpression(StringBuilderCache.GetStringAndFree(sb)));
}
public static StringConcatenationAnalysis Create(StringConcatenationExpressionInfo stringConcatenation)
{
var flags = StringConcatenationFlags.None;
foreach (ExpressionSyntax expression in stringConcatenation.Expressions())
{
StringLiteralExpressionInfo stringLiteral = SyntaxInfo.StringLiteralExpressionInfo(expression);
if (stringLiteral.Success)
{
if (stringLiteral.IsVerbatim)
{
flags |= StringConcatenationFlags.ContainsVerbatimStringLiteral;
}
else
{
flags |= StringConcatenationFlags.ContainsRegularStringLiteral;
}
}
else if (expression.Kind() == SyntaxKind.InterpolatedStringExpression)
{
if (((InterpolatedStringExpressionSyntax)expression).IsVerbatim())
{
flags |= StringConcatenationFlags.ContainsVerbatimInterpolatedString;
}
else
{
flags |= StringConcatenationFlags.ContainsRegularInterpolatedString;
}
}
else
{
flags |= StringConcatenationFlags.ContainsUnspecifiedExpression;
}
}
return(new StringConcatenationAnalysis(flags));
}
internal InterpolatedStringExpressionSyntax ToInterpolatedStringExpression()
{
ThrowInvalidOperationIfNotInitialized();
StringBuilder sb = StringBuilderCache.GetInstance();
sb.Append('$');
bool containsRegular = Analyze().ContainsNonVerbatimExpression;
if (!containsRegular)
{
sb.Append('@');
}
sb.Append('"');
foreach (ExpressionSyntax expression in Expressions(leftToRight: true))
{
SyntaxKind kind = expression.Kind();
StringLiteralExpressionInfo stringLiteral = SyntaxInfo.StringLiteralExpressionInfo(expression);
if (stringLiteral.Success)
{
int startIndex = sb.Length;
if (containsRegular &&
stringLiteral.IsVerbatim)
{
sb.Append(stringLiteral.ValueText);
sb.Replace(@"\", @"\\", startIndex);
sb.Replace("\"", @"\" + "\"", startIndex);
sb.Replace("{", "{{", startIndex);
sb.Replace("}", "}}", startIndex);
sb.Replace("\n", @"\n", startIndex);
sb.Replace("\r", @"\r", startIndex);
}
else
{
sb.Append(stringLiteral.InnerText);
sb.Replace("{", "{{", startIndex);
sb.Replace("}", "}}", startIndex);
}
}
else if (kind == SyntaxKind.InterpolatedStringExpression)
{
var interpolatedString = (InterpolatedStringExpressionSyntax)expression;
bool isVerbatimInterpolatedString = interpolatedString.IsVerbatim();
foreach (InterpolatedStringContentSyntax content in interpolatedString.Contents)
{
Debug.Assert(content.IsKind(SyntaxKind.Interpolation, SyntaxKind.InterpolatedStringText), content.Kind().ToString());
switch (content.Kind())
{
case SyntaxKind.InterpolatedStringText:
{
var text = (InterpolatedStringTextSyntax)content;
if (containsRegular &&
isVerbatimInterpolatedString)
{
int startIndex = sb.Length;
sb.Append(text.TextToken.ValueText);
sb.Replace(@"\", @"\\", startIndex);
sb.Replace("\"", @"\" + "\"", startIndex);
sb.Replace("\n", @"\n", startIndex);
sb.Replace("\r", @"\r", startIndex);
}
else
{
sb.Append(content.ToString());
}
break;
}
case SyntaxKind.Interpolation:
{
sb.Append(content.ToString());
break;
}
}
}
}
else
{
sb.Append('{');
sb.Append(expression.ToString());
sb.Append('}');
}
}
sb.Append("\"");
return((InterpolatedStringExpressionSyntax)ParseExpression(StringBuilderCache.GetStringAndFree(sb)));
}