The (C) Sharp Syntax Rewriter Tool

This is a Roslyn-based tool for C# syntax rewriting with the purpose of source-code desugaring.

Design

There are 2 varieties of rewriter:

• a purely syntactic one, Rewriter, and
• a symbolic one, SymbolicRewriter.

For the rewriting, the former relies on syntactic information only; the latter also relies on symbolic information by means of a SemanticModel.

Rewriters

• BlockifyExpressionBody
• DeanonymizeType
• DecomposeNullConditional
• EmplaceGlobalStatement
• EnsureVisibleConstructor
• ExpandForeach
• ImplementAutoProperty
• ImposeExplicitReturn
• ImposeThisPrefix
• InitializeOutArgument
• ReplicateLocalInitialization
• StoreObjectCreation
• TranslateLinq
• UncoalesceCoalescedNull
• UninterpolateStrings
• UnparameterizeRecordDeclaration

Hint: A "description" of the exact rewrite performed by a given rewriter, you might want to check the tests.

Example

void ApplyRewrite(IRewriter rewriter, SyntaxTree tree)
{
    SyntaxTree tree_P;
    if (rewriter.IsPurelySyntactic())
    {
        tree_P = ((Rewriter)rewriter).Apply(tree);
    }
    else
    {
        Compilation compilation = /* ... */
        tree_P = ((SymbolicRewriter)rewriter).Apply(tree,
                                                    compilation.GetSemanticModel(tree));
    }
}