bloc_lens_macros 0.2.0-dev.1

Macros for bloc_lens

🧪 Experimental macros for bloc_lens

This package provides macros to simplify the use of the bloc_lens package.

Motivation

The bloc_lens package simplifies working with large blocs. But in order to use it, you have to create a lens for every field in the state. The MakeLenses macro reads properties of the state class and generates lenses for them, taking into account types of each field.

❌ Without macros

✅ With macros

class SettingsCubit extends Cubit<SettingsState> { late final scaling = numberLens( get: (s) => s.scaling, set: (s, v) => s.copyWith(scaling: v), min: 0.7, max: 1.4, step: 0.1, ); late final hapticFeedback = boolLens( get: (s) => s.hapticFeedback, set: (s, v) => s.copyWith(hapticFeedback: v), ); late final showGrid = boolLens( get: (s) => s.showGrid, set: (s, v) => s.copyWith(showGrid: v), ); late final themeMode = enumLens( get: (s) => s.themeMode, set: (s, v) => s.copyWith(themeMode: v), values: ThemeMode.values, ); late final locale = lens( get: (s) => s.locale, set: (s, v) => s.copyWith(locale: v), ); } class SettingsState { const SettingsState({ required this.scaling, required this.hapticFeedback, required this.showGrid, required this.themeMode, required this.locale, }); final double scaling; final bool hapticFeedback; final bool showGrid; final ThemeMode themeMode; final Locale locale; }

@MakeLenses() class SettingsCubit extends Cubit<SettingsState> { } class SettingsState { const SettingsState({ required this.scaling, required this.hapticFeedback, required this.showGrid, required this.themeMode, required this.locale, }); @NumberOptions(min: 0.7, max: 1.4, step: 0.1) final double scaling; final bool hapticFeedback; final bool showGrid; final ThemeMode themeMode; final Locale locale; }

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