Getting type of an ImplicitObjectCreationExpression

user_3208848 0
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If I have an ImplicitObjectCreationExpression, how can I get the type that is being created using the SemanticModel?

My code:

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp.Syntax;

public static SemanticModel model;
public static ITypeSymbol GetCreationType (BaseObjectCreationExpressionSyntax boces) =>
    boces switch
    {
        ObjectCreationExpressionSyntax oces => model.GetSymbolInfo(oces.Type).Symbol!,
        ImplicitObjectCreationExpressionSyntax ioces => // ???
    };
microsoft.codeanalysis roslyn new-operator c#
2 Answers

Using sharplab.io, we can see that a statement such as

object x = new();

has a syntax tree like this (showing the new() part only):

enter image description here

The type that you want is a child of the "Operation" node, which you can get with SemanticModel.GetOperation. Then you can just get its Type.

model.GetOperation(ioces).Type!
user_51335850

You want to call GetTypeInfo instead of GetSymbolInfo.

user_9722160
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