private static IEnumerable <StatementSyntax> ExplodeStatements(SyntaxList <StatementSyntax> statements, SyntaxNode toReplace, BlockSyntax block)
{
var nodeID = RoslynCompiler.NodeMark(toReplace);
foreach (var statement in statements)
{
var innerID = RoslynCompiler.NodeMark(statement);
if (innerID == nodeID)
{
foreach (var inner in block.Statements)
{
yield return(inner);
}
}
else
{
yield return(statement);
}
}
}
private ExcessDocument loadDocument(Project project, string fileName, out RoslynCompiler compiler)
{
if (_extensions == null || !_extensions.Any())
{
throw new InvalidOperationException("no extensions registered, plain c#?");
}
var source = File.ReadAllText(fileName);
var document = new RoslynDocument(new Scope(_scope), source, fileName);
var enviroment = new RoslynEnvironment(_scope, new SolutionStorage(project));
var compilerResult = new RoslynCompiler(enviroment, _scope);
var tree = CSharpSyntaxTree.ParseText(source);
var usings = (tree.GetRoot() as CompilationUnitSyntax)
?.Usings
.Where(@using =>
{
var usingId = @using.Name.ToString();
if (!usingId.StartsWith("xs."))
{
return(false);
}
usingId = usingId.Substring("xs.".Length);
var action = null as ExtensionFunc;
if (_extensions.TryGetValue(usingId, out action))
{
action(compilerResult, null); //td: props?
return(true);
}
return(false);
})
.ToArray();
compiler = compilerResult;
return(document);
}
public int GetExcessId(SyntaxToken token)
{
string xsStr = RoslynCompiler.TokenMark(token);
return(xsStr == null ? -1 : int.Parse(xsStr));
}
public SyntaxNode MarkNode(SyntaxNode node)
{
return(RoslynCompiler.MarkNode(node, RoslynCompiler.uniqueId())); //td: scope ids
}
public static Func <SyntaxNode, Scope, SyntaxNode> ReplaceNode(SyntaxNode newNode)
{
return((node, scope) => RoslynCompiler.ReplaceExcessId(newNode, node));
}
public SyntaxToken InitToken(SyntaxToken token, int xsId)
{
return(RoslynCompiler.MarkToken(token, xsId.ToString()));
}
public SyntaxToken MarkToken(SyntaxToken token)
{
string strId = RoslynCompiler.uniqueId();
return(RoslynCompiler.MarkToken(token, strId));
}
public string TokenToString(SyntaxToken token, out string xsId)
{
xsId = RoslynCompiler.TokenMark(token);
return(token.ToFullString());
}
public bool isIdentifier(SyntaxToken token)
{
return(RoslynCompiler.isLexicalIdentifier(token.Kind()));
}
public string GetExcessStringId(SyntaxNode node)
{
return(RoslynCompiler.NodeMark(node));
}
public int GetExcessId(SyntaxNode node)
{
string xsStr = RoslynCompiler.NodeMark(node);
return(xsStr == null ? -1 : int.Parse(xsStr));
}
//rewriters
private Func <SyntaxNode, Scope, LookAheadResult> CheckCodeExtension(SyntaxNode original, SyntacticalExtension <SyntaxNode> extension)
{
return((node, scope) =>
{
var code = node as BlockSyntax;
if (code == null)
{
return new LookAheadResult {
Matched = false
}
}
;
_lookahead = null;
extension.Body = base.Visit(code);
SyntaxNode resulSyntaxNode = null;
if (original is LocalDeclarationStatementSyntax)
{
extension.Kind = ExtensionKind.Expression;
resulSyntaxNode = extension.Handler(node, scope, extension);
if (!(resulSyntaxNode is ExpressionSyntax))
{
//td: error, expecting expression
return new LookAheadResult {
Matched = false
};
}
var localDecl = original as LocalDeclarationStatementSyntax;
resulSyntaxNode = localDecl
.WithDeclaration(localDecl.Declaration
.WithVariables(CSharp.SeparatedList(new[] {
localDecl.Declaration.Variables[0]
.WithInitializer(localDecl.Declaration.Variables[0].Initializer
.WithValue((ExpressionSyntax)resulSyntaxNode))
})))
.WithSemicolonToken(CSharp.ParseToken(";"));
}
else if (original is ExpressionStatementSyntax)
{
var exprStatement = original as ExpressionStatementSyntax;
var assignment = exprStatement.Expression as AssignmentExpressionSyntax;
if (assignment != null)
{
extension.Kind = ExtensionKind.Expression;
resulSyntaxNode = extension.Handler(node, scope, extension);
if (!(resulSyntaxNode is ExpressionSyntax))
{
//td: error, expecting expression
return new LookAheadResult {
Matched = false
};
}
resulSyntaxNode = exprStatement
.WithExpression(assignment
.WithRight((ExpressionSyntax)resulSyntaxNode))
.WithSemicolonToken(CSharp.ParseToken(";"));
}
else
{
resulSyntaxNode = extension.Handler(node, scope, extension);
if (resulSyntaxNode != null)
{
resulSyntaxNode = RoslynCompiler.UpdateExcessId(resulSyntaxNode, node);
}
}
}
else
{
throw new NotImplementedException();
}
return new LookAheadResult
{
Matched = true,
Result = resulSyntaxNode,
};
});
}
public void addDocument(string id, IDocument <SyntaxToken, SyntaxNode, SemanticModel> document, RoslynCompiler compiler)
{
if (_documents
.Where(doc => doc.Id == id)
.Any())
{
throw new InvalidOperationException($"duplicate file: {id}");
}
var newDoc = new CompilationDocument
{
Id = id,
Stage = CompilerStage.Started,
Document = document,
Compiler = compiler,
};
//build the document
var documentInjector = newDoc.Compiler as IDocumentInjector <SyntaxToken, SyntaxNode, SemanticModel>;
documentInjector.apply(newDoc.Document);
_documents.Add(newDoc);
}