Your first form did work in the VS2015 Preview: int i = 42; var s = “\{i}”; That compiled and ran for me. ReSharper complained, but that’s a different matter. For the final release of C#, it is: var s = $”{i}”;
I want to clarify BJ Myers’s (correct) answer. In C# an event can be thought of as a field of delegate type — just as a property can be thought of as a field of the property type — and the value of that “field” can be null. If you are in the unfortunate situation … Read more
Thank you for the isolated repro program and I can confirm that this is indeed a RyuJIT bug in the optimizer which got exposed due to inlining. I’ve made a fix to the compiler and figuring the roll out details. Not to turn SO into a bug tracker, and for a quicker turnaround: ryujit@microsoft.com.
was just wondering if the above warning is something I should worry about. When you have CallerMemberName attribute attached, you don’t have to explicitly pass a value, because the attribute will do exactly that for you. It will find the caller’s name and use it, making your nameof declaration redundant. This is of course assuming … Read more
It’s the minimum width to use for that field, not the maximum. Since your string is longer than the 5 characters you specify for the width, the field is extended to the length of your string. You’ll see the difference more dramatically with a longer width: var p = Process.GetCurrentProcess(); $”Process name is {p.ProcessName, 50}”.Dump(); … Read more
Yes. This is a bug. Thanks for bringing this up. The sample is supposed to compile and should result in a conditional invocation of Get regardless if Get is an extension or not. Usage of “?.” in cc?.Get() is an indication that caller wants cc null-checked before proceeding further. Even if Get could handle null … Read more
No, you can’t use string interpolation with something other than a string literal as the compiler creates a “regular” format string even when you use string interpolation. Because this: string name = “bar”; string result = $”{name}”; is compiled into this: string name = “bar”; string result = string.Format(“{0}”, name); the string in runtime must … Read more
Yes, you can install c# 6.0 into VS2012 and VS2013 on a per project basis as a NuGet package. You’ll have to install this package for every project that you want c# 6.0 features in. https://www.nuget.org/packages/Microsoft.Net.Compilers/ Installing Latest C# Compiler via Nuget Install-Package Microsoft.Net.Compilers EDIT: As pointed out in the comments below, upgrade your NuGet … Read more
The problem with this line Assert.AreEqual(formatted, $”{{countdown|{date:o}}}”); is that you have 3 curly quotes after the format string of the variable to be escaped and it starts escaping from left to right, therefore it treats the first 2 curly quotes as part of the format string and the third curly quote as the closing one. … Read more