{"action":"created","comment":{"url":"https://api.github.com/repos/dotnet/roslyn/pulls/comments/80819876","pull_request_review_id":1847873,"id":80819876,"diff_hunk":"@@ -1802,29 +1809,29 @@ private BetterResult BetterConversionFromExpression(BoundExpression node, TypeSy\n \n             var lambdaOpt = node as UnboundLambda;\n \n-            // Given an implicit conversion C1 that converts from an expression E to a type T1, \n-            // and an implicit conversion C2 that converts from an expression E to a type T2,\n-            // C1 is a better conversion than C2 if E does not exactly match T2 and one of the following holds:\n             bool t1MatchesExactly = ExpressionMatchExactly(node, t1, ref useSiteDiagnostics);\n             bool t2MatchesExactly = ExpressionMatchExactly(node, t2, ref useSiteDiagnostics);\n \n             if (t1MatchesExactly)\n             {\n                 if (!t2MatchesExactly)\n                 {\n-                    // - E exactly matches T1\n                     okToDowngradeToNeither = lambdaOpt != null && CanDowngradeConversionFromLambdaToNeither(BetterResult.Left, lambdaOpt, t1, t2, ref useSiteDiagnostics, false);\n                     return BetterResult.Left;\n                 }\n+                else if (lambdaOpt == null)\n+                {\n+                    // both match exactly, non-lambda case.\n+                    // Neither is a better conversion from expression\n+                    return BetterResult.Neither;\n+                }","path":"src/Compilers/CSharp/Portable/Binder/Semantics/OverloadResolution/OverloadResolution.cs","position":86,"original_position":86,"commit_id":"337d641cce6e1871f5dfdf6d7c8a2e5430d52d6a","original_commit_id":"337d641cce6e1871f5dfdf6d7c8a2e5430d52d6a","user":{"login":"AlekseyTs","id":10522107,"avatar_url":"https://avatars.githubusercontent.com/u/10522107?v=3","gravatar_id":"","url":"https://api.github.com/users/AlekseyTs","html_url":"https://github.com/AlekseyTs","followers_url":"https://api.github.com/users/AlekseyTs/followers","following_url":"https://api.github.com/users/AlekseyTs/following{/other_user}","gists_url":"https://api.github.com/users/AlekseyTs/gists{/gist_id}","starred_url":"https://api.github.com/users/AlekseyTs/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/AlekseyTs/subscriptions","organizations_url":"https://api.github.com/users/AlekseyTs/orgs","repos_url":"https://api.github.com/users/AlekseyTs/repos","events_url":"https://api.github.com/users/AlekseyTs/events{/privacy}","received_events_url":"https://api.github.com/users/AlekseyTs/received_events","type":"User","site_admin":false},"body":"I am not comfortable with this change. It also doesn't match the latest specification quoted by Mads at [https://github.com/dotnet/roslyn/issues/14117](https://github.com/dotnet/roslyn/issues/14117)","created_at":"2016-09-27T23:49:16Z","updated_at":"2016-09-27T23:49:16Z","html_url":"https://github.com/dotnet/roslyn/pull/13999#discussion_r80819876","pull_request_url":"https://api.github.com/repos/dotnet/roslyn/pulls/13999","_links":{"self":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/comments/80819876"},"html":{"href":"https://github.com/dotnet/roslyn/pull/13999#discussion_r80819876"},"pull_request":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/13999"}}},"pull_request":{"url":"https://api.github.com/repos/dotnet/roslyn/pulls/13999","id":86430625,"html_url":"https://github.com/dotnet/roslyn/pull/13999","diff_url":"https://github.com/dotnet/roslyn/pull/13999.diff","patch_url":"https://github.com/dotnet/roslyn/pull/13999.patch","issue_url":"https://api.github.com/repos/dotnet/roslyn/issues/13999","number":13999,"state":"open","locked":false,"title":"Implement pattern-matching in top-level scripts","user":{"login":"gafter","id":3804346,"avatar_url":"https://avatars.githubusercontent.com/u/3804346?v=3","gravatar_id":"","url":"https://api.github.com/users/gafter","html_url":"https://github.com/gafter","followers_url":"https://api.github.com/users/gafter/followers","following_url":"https://api.github.com/users/gafter/following{/other_user}","gists_url":"https://api.github.com/users/gafter/gists{/gist_id}","starred_url":"https://api.github.com/users/gafter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gafter/subscriptions","organizations_url":"https://api.github.com/users/gafter/orgs","repos_url":"https://api.github.com/users/gafter/repos","events_url":"https://api.github.com/users/gafter/events{/privacy}","received_events_url":"https://api.github.com/users/gafter/received_events","type":"User","site_admin":false},"body":"in which pattern variables become fields.\r\nFixes #10603\r\n\r\n@AlekseyTs @agocke Please review.\r\n/cc @dotnet/roslyn-compiler","created_at":"2016-09-22T23:14:06Z","updated_at":"2016-09-27T23:49:16Z","closed_at":null,"merged_at":null,"merge_commit_sha":"6c639b71539156bb56a463106bc421ae0b4cfab7","assignee":{"login":"gafter","id":3804346,"avatar_url":"https://avatars.githubusercontent.com/u/3804346?v=3","gravatar_id":"","url":"https://api.github.com/users/gafter","html_url":"https://github.com/gafter","followers_url":"https://api.github.com/users/gafter/followers","following_url":"https://api.github.com/users/gafter/following{/other_user}","gists_url":"https://api.github.com/users/gafter/gists{/gist_id}","starred_url":"https://api.github.com/users/gafter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gafter/subscriptions","organizations_url":"https://api.github.com/users/gafter/orgs","repos_url":"https://api.github.com/users/gafter/repos","events_url":"https://api.github.com/users/gafter/events{/privacy}","received_events_url":"https://api.github.com/users/gafter/received_events","type":"User","site_admin":false},"assignees":[{"login":"gafter","id":3804346,"avatar_url":"https://avatars.githubusercontent.com/u/3804346?v=3","gravatar_id":"","url":"https://api.github.com/users/gafter","html_url":"https://github.com/gafter","followers_url":"https://api.github.com/users/gafter/followers","following_url":"https://api.github.com/users/gafter/following{/other_user}","gists_url":"https://api.github.com/users/gafter/gists{/gist_id}","starred_url":"https://api.github.com/users/gafter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gafter/subscriptions","organizations_url":"https://api.github.com/users/gafter/orgs","repos_url":"https://api.github.com/users/gafter/repos","events_url":"https://api.github.com/users/gafter/events{/privacy}","received_events_url":"https://api.github.com/users/gafter/received_events","type":"User","site_admin":false}],"milestone":{"url":"https://api.github.com/repos/dotnet/roslyn/milestones/23","html_url":"https://github.com/dotnet/roslyn/milestones/2.0%20(RC)","labels_url":"https://api.github.com/repos/dotnet/roslyn/milestones/23/labels","id":1926441,"number":23,"title":"2.0 (RC)","description":"","creator":{"login":"ManishJayaswal","id":9527491,"avatar_url":"https://avatars.githubusercontent.com/u/9527491?v=3","gravatar_id":"","url":"https://api.github.com/users/ManishJayaswal","html_url":"https://github.com/ManishJayaswal","followers_url":"https://api.github.com/users/ManishJayaswal/followers","following_url":"https://api.github.com/users/ManishJayaswal/following{/other_user}","gists_url":"https://api.github.com/users/ManishJayaswal/gists{/gist_id}","starred_url":"https://api.github.com/users/ManishJayaswal/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ManishJayaswal/subscriptions","organizations_url":"https://api.github.com/users/ManishJayaswal/orgs","repos_url":"https://api.github.com/users/ManishJayaswal/repos","events_url":"https://api.github.com/users/ManishJayaswal/events{/privacy}","received_events_url":"https://api.github.com/users/ManishJayaswal/received_events","type":"User","site_admin":false},"open_issues":735,"closed_issues":140,"state":"open","created_at":"2016-08-06T00:01:13Z","updated_at":"2016-09-27T23:38:36Z","due_on":null,"closed_at":null},"commits_url":"https://api.github.com/repos/dotnet/roslyn/pulls/13999/commits","review_comments_url":"https://api.github.com/repos/dotnet/roslyn/pulls/13999/comments","review_comment_url":"https://api.github.com/repos/dotnet/roslyn/pulls/comments{/number}","comments_url":"https://api.github.com/repos/dotnet/roslyn/issues/13999/comments","statuses_url":"https://api.github.com/repos/dotnet/roslyn/statuses/337d641cce6e1871f5dfdf6d7c8a2e5430d52d6a","head":{"label":"gafter:master-10603","ref":"master-10603","sha":"337d641cce6e1871f5dfdf6d7c8a2e5430d52d6a","user":{"login":"gafter","id":3804346,"avatar_url":"https://avatars.githubusercontent.com/u/3804346?v=3","gravatar_id":"","url":"https://api.github.com/users/gafter","html_url":"https://github.com/gafter","followers_url":"https://api.github.com/users/gafter/followers","following_url":"https://api.github.com/users/gafter/following{/other_user}","gists_url":"https://api.github.com/users/gafter/gists{/gist_id}","starred_url":"https://api.github.com/users/gafter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gafter/subscriptions","organizations_url":"https://api.github.com/users/gafter/orgs","repos_url":"https://api.github.com/users/gafter/repos","events_url":"https://api.github.com/users/gafter/events{/privacy}","received_events_url":"https://api.github.com/users/gafter/received_events","type":"User","site_admin":false},"repo":{"id":30125216,"name":"roslyn","full_name":"gafter/roslyn","owner":{"login":"gafter","id":3804346,"avatar_url":"https://avatars.githubusercontent.com/u/3804346?v=3","gravatar_id":"","url":"https://api.github.com/users/gafter","html_url":"https://github.com/gafter","followers_url":"https://api.github.com/users/gafter/followers","following_url":"https://api.github.com/users/gafter/following{/other_user}","gists_url":"https://api.github.com/users/gafter/gists{/gist_id}","starred_url":"https://api.github.com/users/gafter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gafter/subscriptions","organizations_url":"https://api.github.com/users/gafter/orgs","repos_url":"https://api.github.com/users/gafter/repos","events_url":"https://api.github.com/users/gafter/events{/privacy}","received_events_url":"https://api.github.com/users/gafter/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/gafter/roslyn","description":"The .NET Compiler Platform (\"Roslyn\") provides open-source C# and Visual Basic compilers with rich code analysis APIs.","fork":true,"url":"https://api.github.com/repos/gafter/roslyn","forks_url":"https://api.github.com/repos/gafter/roslyn/forks","keys_url":"https://api.github.com/repos/gafter/roslyn/keys{/key_id}","collaborators_url":"https://api.github.com/repos/gafter/roslyn/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/gafter/roslyn/teams","hooks_url":"https://api.github.com/repos/gafter/roslyn/hooks","issue_events_url":"https://api.github.com/repos/gafter/roslyn/issues/events{/number}","events_url":"https://api.github.com/repos/gafter/roslyn/events","assignees_url":"https://api.github.com/repos/gafter/roslyn/assignees{/user}","branches_url":"https://api.github.com/repos/gafter/roslyn/branches{/branch}","tags_url":"https://api.github.com/repos/gafter/roslyn/tags","blobs_url":"https://api.github.com/repos/gafter/roslyn/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/gafter/roslyn/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/gafter/roslyn/git/refs{/sha}","trees_url":"https://api.github.com/repos/gafter/roslyn/git/trees{/sha}","statuses_url":"https://api.github.com/repos/gafter/roslyn/statuses/{sha}","languages_url":"https://api.github.com/repos/gafter/roslyn/languages","stargazers_url":"https://api.github.com/repos/gafter/roslyn/stargazers","contributors_url":"https://api.github.com/repos/gafter/roslyn/contributors","subscribers_url":"https://api.github.com/repos/gafter/roslyn/subscribers","subscription_url":"https://api.github.com/repos/gafter/roslyn/subscription","commits_url":"https://api.github.com/repos/gafter/roslyn/commits{/sha}","git_commits_url":"https://api.github.com/repos/gafter/roslyn/git/commits{/sha}","comments_url":"https://api.github.com/repos/gafter/roslyn/comments{/number}","issue_comment_url":"https://api.github.com/repos/gafter/roslyn/issues/comments{/number}","contents_url":"https://api.github.com/repos/gafter/roslyn/contents/{+path}","compare_url":"https://api.github.com/repos/gafter/roslyn/compare/{base}...{head}","merges_url":"https://api.github.com/repos/gafter/roslyn/merges","archive_url":"https://api.github.com/repos/gafter/roslyn/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/gafter/roslyn/downloads","issues_url":"https://api.github.com/repos/gafter/roslyn/issues{/number}","pulls_url":"https://api.github.com/repos/gafter/roslyn/pulls{/number}","milestones_url":"https://api.github.com/repos/gafter/roslyn/milestones{/number}","notifications_url":"https://api.github.com/repos/gafter/roslyn/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/gafter/roslyn/labels{/name}","releases_url":"https://api.github.com/repos/gafter/roslyn/releases{/id}","deployments_url":"https://api.github.com/repos/gafter/roslyn/deployments","created_at":"2015-01-31T20:26:12Z","updated_at":"2016-02-18T04:08:14Z","pushed_at":"2016-09-27T23:24:38Z","git_url":"git://github.com/gafter/roslyn.git","ssh_url":"git@github.com:gafter/roslyn.git","clone_url":"https://github.com/gafter/roslyn.git","svn_url":"https://github.com/gafter/roslyn","homepage":"","size":174212,"stargazers_count":1,"watchers_count":1,"language":"C#","has_issues":true,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":0,"mirror_url":null,"open_issues_count":2,"forks":0,"open_issues":2,"watchers":1,"default_branch":"master"}},"base":{"label":"dotnet:master","ref":"master","sha":"83346efe3512e8a1c14872ac11f7b359f7486cc7","user":{"login":"dotnet","id":9141961,"avatar_url":"https://avatars.githubusercontent.com/u/9141961?v=3","gravatar_id":"","url":"https://api.github.com/users/dotnet","html_url":"https://github.com/dotnet","followers_url":"https://api.github.com/users/dotnet/followers","following_url":"https://api.github.com/users/dotnet/following{/other_user}","gists_url":"https://api.github.com/users/dotnet/gists{/gist_id}","starred_url":"https://api.github.com/users/dotnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dotnet/subscriptions","organizations_url":"https://api.github.com/users/dotnet/orgs","repos_url":"https://api.github.com/users/dotnet/repos","events_url":"https://api.github.com/users/dotnet/events{/privacy}","received_events_url":"https://api.github.com/users/dotnet/received_events","type":"Organization","site_admin":false},"repo":{"id":29078997,"name":"roslyn","full_name":"dotnet/roslyn","owner":{"login":"dotnet","id":9141961,"avatar_url":"https://avatars.githubusercontent.com/u/9141961?v=3","gravatar_id":"","url":"https://api.github.com/users/dotnet","html_url":"https://github.com/dotnet","followers_url":"https://api.github.com/users/dotnet/followers","following_url":"https://api.github.com/users/dotnet/following{/other_user}","gists_url":"https://api.github.com/users/dotnet/gists{/gist_id}","starred_url":"https://api.github.com/users/dotnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dotnet/subscriptions","organizations_url":"https://api.github.com/users/dotnet/orgs","repos_url":"https://api.github.com/users/dotnet/repos","events_url":"https://api.github.com/users/dotnet/events{/privacy}","received_events_url":"https://api.github.com/users/dotnet/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/dotnet/roslyn","description":"The .NET Compiler Platform (\"Roslyn\") provides open-source C# and Visual Basic compilers with rich code analysis APIs.","fork":false,"url":"https://api.github.com/repos/dotnet/roslyn","forks_url":"https://api.github.com/repos/dotnet/roslyn/forks","keys_url":"https://api.github.com/repos/dotnet/roslyn/keys{/key_id}","collaborators_url":"https://api.github.com/repos/dotnet/roslyn/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/dotnet/roslyn/teams","hooks_url":"https://api.github.com/repos/dotnet/roslyn/hooks","issue_events_url":"https://api.github.com/repos/dotnet/roslyn/issues/events{/number}","events_url":"https://api.github.com/repos/dotnet/roslyn/events","assignees_url":"https://api.github.com/repos/dotnet/roslyn/assignees{/user}","branches_url":"https://api.github.com/repos/dotnet/roslyn/branches{/branch}","tags_url":"https://api.github.com/repos/dotnet/roslyn/tags","blobs_url":"https://api.github.com/repos/dotnet/roslyn/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/dotnet/roslyn/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/dotnet/roslyn/git/refs{/sha}","trees_url":"https://api.github.com/repos/dotnet/roslyn/git/trees{/sha}","statuses_url":"https://api.github.com/repos/dotnet/roslyn/statuses/{sha}","languages_url":"https://api.github.com/repos/dotnet/roslyn/languages","stargazers_url":"https://api.github.com/repos/dotnet/roslyn/stargazers","contributors_url":"https://api.github.com/repos/dotnet/roslyn/contributors","subscribers_url":"https://api.github.com/repos/dotnet/roslyn/subscribers","subscription_url":"https://api.github.com/repos/dotnet/roslyn/subscription","commits_url":"https://api.github.com/repos/dotnet/roslyn/commits{/sha}","git_commits_url":"https://api.github.com/repos/dotnet/roslyn/git/commits{/sha}","comments_url":"https://api.github.com/repos/dotnet/roslyn/comments{/number}","issue_comment_url":"https://api.github.com/repos/dotnet/roslyn/issues/comments{/number}","contents_url":"https://api.github.com/repos/dotnet/roslyn/contents/{+path}","compare_url":"https://api.github.com/repos/dotnet/roslyn/compare/{base}...{head}","merges_url":"https://api.github.com/repos/dotnet/roslyn/merges","archive_url":"https://api.github.com/repos/dotnet/roslyn/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/dotnet/roslyn/downloads","issues_url":"https://api.github.com/repos/dotnet/roslyn/issues{/number}","pulls_url":"https://api.github.com/repos/dotnet/roslyn/pulls{/number}","milestones_url":"https://api.github.com/repos/dotnet/roslyn/milestones{/number}","notifications_url":"https://api.github.com/repos/dotnet/roslyn/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/dotnet/roslyn/labels{/name}","releases_url":"https://api.github.com/repos/dotnet/roslyn/releases{/id}","deployments_url":"https://api.github.com/repos/dotnet/roslyn/deployments","created_at":"2015-01-11T02:39:03Z","updated_at":"2016-09-27T19:51:55Z","pushed_at":"2016-09-27T23:44:43Z","git_url":"git://github.com/dotnet/roslyn.git","ssh_url":"git@github.com:dotnet/roslyn.git","clone_url":"https://github.com/dotnet/roslyn.git","svn_url":"https://github.com/dotnet/roslyn","homepage":"","size":338917,"stargazers_count":6268,"watchers_count":6268,"language":"C#","has_issues":true,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":1505,"mirror_url":null,"open_issues_count":3281,"forks":1505,"open_issues":3281,"watchers":6268,"default_branch":"master"}},"_links":{"self":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/13999"},"html":{"href":"https://github.com/dotnet/roslyn/pull/13999"},"issue":{"href":"https://api.github.com/repos/dotnet/roslyn/issues/13999"},"comments":{"href":"https://api.github.com/repos/dotnet/roslyn/issues/13999/comments"},"review_comments":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/13999/comments"},"review_comment":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/comments{/number}"},"commits":{"href":"https://api.github.com/repos/dotnet/roslyn/pulls/13999/commits"},"statuses":{"href":"https://api.github.com/repos/dotnet/roslyn/statuses/337d641cce6e1871f5dfdf6d7c8a2e5430d52d6a"}}}}
{"actor":{"display_login":"AlekseyTs"}}