IOperation API support for BoundDynamicObjectCreationExpression

[mavasani]

This has similar design aspect as #20114 (comment). BoundDynamicObjectCreationExpression is very similar to BoundObjectCreationExpression, except that we do not have a single bound constructor, but instead a method group of applicable constructors. We can either reuse IObjectCreationExpression with null Constructor and expose a MethodGroup of applicable methods or introduce a new IDynamicObjectCreationExpression as follows:

    public interface IDynamicObjectCreationExpression : IHasArgumentsExpression
    {
        /// <summary>
        /// Applicable methods.
        /// </summary>
        ImmutableArray<IMethodSymbol> ApplicableMethods { get; }
        /// <summary>
        /// List of member or collection initializer expressions in the object initializer, if any.
        /// </summary>
        ImmutableArray<IOperation> Initializers { get; }
    }

[mavasani]

@jinujoseph Another API to discuss today. We should try to cover all DynamicXXX related expressions.

[jinujoseph]

Design Team Decision

Decision was to create a common IDynamicHasArgumentsExpression.. and then each of the dynamic invocation, object creation and indexer access will derive from it. Which should have list of applicable symbols, the name as string (in case we find no applicable symbols) and other props.

[mavasani]

Fixed with #20962