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Fluent APIs are not allowed in non-builder types #1994

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Merged
merged 8 commits into from
Dec 15, 2022
Merged

Fluent APIs are not allowed in non-builder types #1994

merged 8 commits into from
Dec 15, 2022

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adamsitnik
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Based on the feedback from @bartonjs

@adamsitnik adamsitnik requested a review from jozkee December 15, 2022 15:51
@KalleOlaviNiemitalo
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Should the ArgumentValidation.AcceptExistingOnly and OptionValidation.AcceptExistingOnly methods likewise return void?

jozkee
jozkee reviewed Dec 15, 2022
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@adamsitnik adamsitnik requested a review from jozkee December 15, 2022 16:31
jozkee
jozkee reviewed Dec 15, 2022
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src/System.CommandLine.Tests/OptionTests.cs Outdated
@@ -372,10 +372,8 @@ public void Option_of_enum_can_limit_enum_members_as_valid_values()
[Fact]
public void Option_of_T_fluent_APIs_return_Option_of_T()
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You might as well remove the test

jozkee
jozkee reviewed Dec 15, 2022
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src/System.CommandLine.Tests/ParsingValidationTests.cs
@@ -672,9 +690,12 @@ public void LegalFileNamesOnly_rejects_option_arguments_containing_invalid_file_
[Fact]
public void LegalFileNamesOnly_accepts_command_arguments_containing_valid_file_name_characters()
{
Argument<string[]> argument = new ();
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nit

Suggested change
Argument<string[]> argument = new ();
Argument<string[]> argument = new();

jozkee
jozkee approved these changes Dec 15, 2022
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Should the ArgumentValidation.AcceptExistingOnly and OptionValidation.AcceptExistingOnly methods likewise return void?

Up to Adam's choice, but that could be addressed in a follow-up PR if required.

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Should the ArgumentValidation.AcceptExistingOnly and OptionValidation.AcceptExistingOnly methods likewise return void?

That is a very good question. To be honest I don't like AcceptLegalFilePathsOnly and AcceptLegalFileNamesOnly as they don't restrict the argument/option type in any way. Example:

Option<bool> flag = new ("--flag");
flag.AcceptLegalFilePathsOnly(); // it should work only with files, not things like boolean

ArgumentValidation.AcceptExistingOnly and OptionValidation.AcceptExistingOnly restrict the types, but our BCL guidelines are against introducing extension methods for types that we own (they should be just instance methods). When @bartonjs and @jonsequitur are back from holidays I am going to discuss it with them.

@adamsitnik adamsitnik merged commit c33ead5 into dotnet:main Dec 15, 2022
@adamsitnik adamsitnik deleted the returnVoid branch December 15, 2022 18:29
@KalleOlaviNiemitalo KalleOlaviNiemitalo mentioned this pull request Jan 29, 2023
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@adamsitnik @KalleOlaviNiemitalo @jozkee