{"action":"created","comment":{"url":"https://api.github.com/repos/dotnet/roslyn/pulls/comments/30638531","id":30638531,"diff_hunk":"@@ -291,7 +291,7 @@ internal override bool HasMetadataConstantValue\n         {","path":"src/Compilers/CSharp/Portable/Symbols/Metadata/PE/PEParameterSymbol.cs","position":1,"original_position":1,"commit_id":"24910a1a1fe37937732ed46059703fa6d7f9c528","original_commit_id":"ec026f96093ab9699177aebd1291840176d1ab55","user":{"login":"agocke","id":515774,"avatar_url":"https://avatars.githubusercontent.com/u/515774?v=3","gravatar_id":"","url":"https://api.github.com/users/agocke","html_url":"https://github.com/agocke","followers_url":"https://api.github.com/users/agocke/followers","following_url":"https://api.github.com/users/agocke/following{/other_user}","gists_url":"https://api.github.com/users/agocke/gists{/gist_id}","starred_url":"https://api.github.com/users/agocke/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/agocke/subscriptions","organizations_url":"https://api.github.com/users/agocke/orgs","repos_url":"https://api.github.com/users/agocke/repos","events_url":"https://api.github.com/users/agocke/events{/privacy}","received_events_url":"https://api.github.com/users/agocke/received_events","type":"User","site_admin":false},"body":"It looks like ExplicitDefaultConstantValue has two options:\r\n\r\n1. If the parameter is not optional then it returns null.\r\n1. Otherwise return ImportConstantValue\r\n\r\nImportConstantValue either\r\n\r\n1. Loads from ParamDefaultValue if HasDefault is selected\r\n2. Loads a decimal or datetime\r\n\r\nThe default implementation of HasDefaultConstantValue asks if ExplicitDefaultConstantValue is null, decimal, or datetime and returns false in any of those cases. 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