public static IEnumerable <SyntaxNode> BuildForEach(this RoslynTranslator translator, ForEachHeaderModel forEachHeaderModelStatement,
IPortModel portModel)
{
IPortModel loopExecutionInputPortModel = forEachHeaderModelStatement.InputPort;
IPortModel insertLoopPortModel = loopExecutionInputPortModel?.ConnectionPortModels?.FirstOrDefault();
var insertLoopNodeModel = insertLoopPortModel?.NodeModel as IHasMainInputPort;
IPortModel collectionInputPortModel = insertLoopNodeModel?.InputPort;
if (collectionInputPortModel == null || !collectionInputPortModel.Connected ||
!collectionInputPortModel.DataType.IsVsArrayType(translator.Stencil))
{
yield break;
}
var collectionName = translator.MakeUniqueName("Collection");
SyntaxNode collectionSyntax =
translator.BuildPort(collectionInputPortModel).SingleOrDefault();
yield return(RoslynBuilder.DeclareLoopCollectionVariable(collectionSyntax, collectionName));
if (forEachHeaderModelStatement.IndexVariableDeclarationModel != null)
{
yield return(forEachHeaderModelStatement.IndexVariableDeclarationModel.DeclareLoopIndexVariable(-1));
}
if (forEachHeaderModelStatement.CountVariableDeclarationModel != null)
{
var collectionInput =
translator.BuildPort(collectionInputPortModel).SingleOrDefault() as ExpressionSyntax;
yield return(forEachHeaderModelStatement.CountVariableDeclarationModel.DeclareLoopCountVariable(
collectionInput,
collectionName,
translator));
}
var forEachBlock = SyntaxFactory.Block();
foreach (var localDeclaration in BuildLocalDeclarations(translator, forEachHeaderModelStatement))
{
forEachBlock = forEachBlock.AddStatements(localDeclaration);
}
if (forEachHeaderModelStatement.IndexVariableDeclarationModel != null)
{
forEachBlock = forEachBlock.AddStatements(SyntaxFactory.ExpressionStatement(
SyntaxFactory.PostfixUnaryExpression(
SyntaxKind.PostIncrementExpression,
SyntaxFactory.IdentifierName(forEachHeaderModelStatement.IndexVariableDeclarationModel.name)))
);
}
translator.BuildStack(forEachHeaderModelStatement, ref forEachBlock, StackExitStrategy.Continue);
var itemModel = forEachHeaderModelStatement.ItemVariableDeclarationModel;
if (itemModel == null)
{
yield break;
}
yield return(SyntaxFactory.ForEachStatement(
SyntaxFactory.IdentifierName("var"),
SyntaxFactory.Identifier(itemModel.VariableName),
SyntaxFactory.IdentifierName(collectionName),
forEachBlock));
}
