Here is a little program that removes the optional semicolon after all class-, struct-, interface and enum-declarations within a solution. The program loops through documents within the solution, and uses a SyntaxWriter
for rewriting the syntaxtree. If any changes were made, the original code-files are overwritten with the new syntax.
using System;
using System.IO;
using System.Linq;
using Roslyn.Compilers.CSharp;
using Roslyn.Services;
namespace TrailingSemicolon
{
class Program
{
static void Main(string[] args)
{
string solutionfile = @"c:\temp\mysolution.sln";
var workspace = Workspace.LoadSolution(solutionfile);
var solution = workspace.CurrentSolution;
var rewriter = new TrailingSemicolonRewriter();
foreach (var project in solution.Projects)
{
foreach (var document in project.Documents)
{
SyntaxTree tree = (SyntaxTree)document.GetSyntaxTree();
var newSource = rewriter.Visit(tree.GetRoot());
if (newSource != tree.GetRoot())
{
File.WriteAllText(tree.FilePath, newSource.GetText().ToString());
}
}
}
}
class TrailingSemicolonRewriter : SyntaxRewriter
{
public override SyntaxNode VisitClassDeclaration(ClassDeclarationSyntax node)
{
return RemoveSemicolon(node, node.SemicolonToken, t => node.WithSemicolonToken(t));
}
public override SyntaxNode VisitInterfaceDeclaration(InterfaceDeclarationSyntax node)
{
return RemoveSemicolon(node, node.SemicolonToken, t => node.WithSemicolonToken(t));
}
public override SyntaxNode VisitStructDeclaration(StructDeclarationSyntax node)
{
return RemoveSemicolon(node, node.SemicolonToken, t => node.WithSemicolonToken(t));
}
public override SyntaxNode VisitEnumDeclaration(EnumDeclarationSyntax node)
{
return RemoveSemicolon(node, node.SemicolonToken, t => node.WithSemicolonToken(t));
}
private SyntaxNode RemoveSemicolon(SyntaxNode node,
SyntaxToken semicolonToken,
Func<SyntaxToken, SyntaxNode> withSemicolonToken)
{
if (semicolonToken.Kind != SyntaxKind.None)
{
var leadingTrivia = semicolonToken.LeadingTrivia;
var trailingTrivia = semicolonToken.TrailingTrivia;
SyntaxToken newToken = Syntax.Token(
leadingTrivia,
SyntaxKind.None,
trailingTrivia);
bool addNewline = semicolonToken.HasTrailingTrivia
&& trailingTrivia.Count() == 1
&& trailingTrivia.First().Kind == SyntaxKind.EndOfLineTrivia;
var newNode = withSemicolonToken(newToken);
if (addNewline)
return newNode.WithTrailingTrivia(Syntax.Whitespace(Environment.NewLine));
else
return newNode;
}
return node;
}
}
}
}
Hopefully it is something along the lines of what you were looking for.