Work around Dart custom lint rule

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Dart ಠࣗLintϧʔϧ΁ͷ ϫʔΫΞϥ΢ϯυ 2020/02/28 Flutter Meetup Osaka #2 tomocy (@towocy)

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੩తղੳͱ͸

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੩తղੳ ࣮ߦϑΝΠϧΛ࣮ߦ͢Δ͜ͱͳ͘ ղੳΛߦ͏͜ͱ https://ja.wikipedia.org/wiki/%E9%9D%99%E7%9A%84%E3%82%B3%E3%83%BC%E3%83%89%E8%A7%A3%E6%9E%90

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੩తղੳΛར༻͢Δ͜ͱͰ ιʔείʔυͷ ิ׬΍ϑΥʔϚοτ͕Ͱ͖Δ

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Lint ιʔείʔυʹજΉ໰୊Λ ݕग़ɺࢦఠ͢Δ

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Lint ιʔείʔυʹજΉ໰୊Λ ݕग़ɺࢦఠ͢Δ

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Lint ιʔείʔυʹજΉ໰୊Λ ݕग़ɺࢦఠ͢Δ

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analysis_options.yaml

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analysis_opsions.yaml LintϧʔϧΛྻڍͯ͠ ݕग़ɺࢦఠͷର৅ΛఆΊΔ

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ಠࣗLintϧʔϧ

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ಠࣗLintϧʔϧ ެࣜҎ֎ͷLintϧʔϧ΋ཉ͍͠

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ಠࣗLintϧʔϧ dart-lang/linter#697ʹͯݕ౼த (2020/02/28࣌఺) https://github.com/dart-lang/linter/issues/697

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ಠࣗLintϧʔϧ ͲͷΑ͏ʹ࣮ݱ͞ΕΔʹͤΑ dart-lang/linterΛ࢖͏͜ͱʹͳΓͦ͏

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LintRuleʢϧʔϧͷ໊લɺઆ໌ɺର৅ͷNodeΛઃఆʣ Visitorʢର৅ͷNodeʹର͢ΔݕূΛ࣮૷ʣ ʢSimpleAstVisitorҎ֎ʹ΋Visitor͕͋Δʣ

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1. LintRuleଆͰର৅ͷNodeΛొ࿥͓ͯ͘͠

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2. VisitorଆͰͦͷNodeΛݕࠪ͢Δ 1. LintRuleଆͰର৅ͷNodeΛొ࿥͓ͯ͘͠

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ಠࣗLintϧʔϧ΁ͷ ϫʔΫΞϥ΢ϯυ

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WidgetͷίϯετϥΫλʔͷҾ਺͸ ׳शతʹ໊લ෇͖Ҿ਺ʹ͢Δ https://api.ﬂutter.dev/ﬂutter/widgets/StatelessWidget-class.html

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WidgetͷίϯετϥΫλʔͷҾ਺͸ ׳शతʹ໊લ෇͖Ҿ਺ʹ͢Δ ίϯετϥΫλʔͷҾ਺໊͕લ෇͖Ҿ਺Ͱͳ͍WidgetΛ ໰୊ͱͯ͠ࢦఠ͢ΔLintϧʔϧ https://api.ﬂutter.dev/ﬂutter/widgets/StatelessWidget-class.html

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ಠࣗLintϧʔϧ use named parameters in widget constructors

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tool/rule.dart Lintϧʔϧͷ਽ܗͱͦͷςετΛੜ੒͢Δ Lintϧʔϧͷ໊લ

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ςετ LintΤϥʔΛग़ͯ͠ཉ͍͠ߦʹ // Lint ίϝϯτΛॻ͘

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Line Rule Lintϧʔϧͷ આ໌ͱৄࡉ

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Lint Rule Lintͷର৅ͷNodeΛొ࿥

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Lint Rule Lintͷର৅ͷNodeΛొ࿥ ࠓճ͸ΫϥεఆٛͷNodeΛղੳ͢Δ

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Visitor ର৅ͷNodeͷղੳ

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Visitor ର৅ͷNodeͷղੳ WidgetͷίϯετϥΫλʔͷҾ਺͕ ໊લ෇͖Ҿ਺Ͱ͋Δ͔Λ֬ೝ

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·ͱΊ

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- LintͰίʔυͷ໰୊Λݕग़ - analysis_options.yamlͰ ɹLintϧʔϧΛ૊Έ߹Θͤ - ಠࣗLintϧʔϧ͸·ͩඇެࣜ

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ϧʔϧΛकָͬͯ͘͠Flutter/Dart!

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͋Γ͕ͱ͏͍͟͝·ͨ͠

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Links ੩తղੳ https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html Issue ‘Support custom lint rule' https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html Stateless Widget https://api.flutter.dev/flutter/widgets/StatelessWidget-class.html Lint rule ‘use named parameters in widget constructors’ https://github.com/tomocy/dart-linter/tree/use_named_parameters_in_widget_constructors