Update lambda-improvements.md to match language design decisions#5388
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cston merged 11 commits intodotnet:mainfrom Nov 9, 2021
Merged
Update lambda-improvements.md to match language design decisions#5388cston merged 11 commits intodotnet:mainfrom
cston merged 11 commits intodotnet:mainfrom
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333fred
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Nov 8, 2021
333fred
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Nov 8, 2021
jcouv
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Nov 9, 2021
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| ### `var` | ||
| Lambda expressions and method groups with natural types can be used as initializers in `var` declarations. | ||
| Anonymous functions and method groups with inferred types can be used as initializers in `var` declarations. |
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Nov 9, 2021
| var f8 = F2; // System.Action<string> | ||
| ``` | ||
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| The type of an anonymous function or method group is not inferred for implicitly-typed discards. |
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Consider: "Function types are not used in assignments to discards" #Resolved
jcouv
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Nov 9, 2021
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| ``` | ||
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| ## Open issues |
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Haven't those open issues been resolved already?
jcouv
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Nov 9, 2021
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| Currently, the inferred delegate type uses `System.Action<>` or `System.Func<>` when parameter and return types are valid type arguments _and_ there are no more than 16 parameters, and if the expected `Action<>` or `Func<>` type is missing, an error is reported. Instead, should the compiler use `System.Action<>` or `System.Func<>` regardless of arity? And if the expected type is missing, synthesize a delegate type otherwise? | ||
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| ## Design meetings |
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Consider moving this list to the championed issue (easier to update), or only keeping it here and updating it with latest links. #Resolved
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Done with review pass (iteration 10)
jcouv
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Nov 9, 2021
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Various updates to proposals/csharp-10.0/lambda-improvements.md to match language design decisions and C#10 implementation:
varcannot be used as an explicit return type (see 2021-06-02)object(see 2021-08-23)