public LambdaExpression(
MetaData metaData,
[NotNull] StatementList body,
// FEATURE #22
[CanBeNull] IList <VariableDeclaration> parameterList = null,
[CanBeNull] Type returnType = null,
[CanBeNull] ReturnLabelDeclaration endLabel = null,
bool recur = false) : base(metaData)
{
Body = body;
DeclaredType = returnType;
Recur = recur;
ParameterList = parameterList ?? new List <VariableDeclaration>(0);
EndLabel = endLabel ?? new ReturnLabelDeclaration(MetaData, "");
}
public override void SurroundWith(Environment environment)
{
// base.SurroundWith(environment);
Env = environment;
Expression.SurroundWith(Env);
if (null != ReturnLabel)
{
return;
}
var returnLabel = Env.FindReturnLabelByName(_labelName ?? "");
if (null == returnLabel)
{
Errors.AddAndThrow($"{MetaData.GetErrorHeader()}cannot return outside a lambda");
}
else
{
ReturnLabel = returnLabel;
ReturnLabel.StatementsUsingThis.Add(this);
}
if (Expression is AtomicExpression)
{
return;
}
var variableName = $"genRet{(ulong) GetHashCode()}";
ConvertedVariableDeclaration =
new VariableDeclaration(MetaData, variableName, Expression, type: Expression.GetExpressionType());
ConvertedReturnStatement = new ReturnStatement(MetaData,
new VariableExpression(MetaData, variableName), _labelName)
{
ReturnLabel = ReturnLabel
};
ConvertedStatementList = new StatementList(MetaData,
ConvertedVariableDeclaration,
ConvertedReturnStatement);
}
