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Kallen Tu kallentu

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Software Engineer @google @dart-lang

kallentu / gist:f996adb3e4a9f5bc93e418a521d93460

Created June 20, 2024 22:21

cfe failure on wildcard class type parameters



	/==================================================================================================================\
	\| pkg/front_end/test/fasta/strong/wildcard_variables/class_type_parameters is new and failed (Fail, expected Pass) \|
	\==================================================================================================================/

	library;
	import self as self;
	import "dart:core" as core;

kallentu / edgeinsets.txt

Created April 2, 2024 21:48

EdgeInset reference from dart doc flutter

	building flutter docs into: Directory: '/tmp/flutterRDUIZE'
	copying /usr/local/google/home/kallentu/.pub-cache to /tmp/pubcacheTTCOEX
	flutter-clean: % Total % Received % Xferd Average Speed Time Time Time Current
	flutter-clean: Dload Upload Total Spent Left Speed
	flutter-clean:
	flutter-clean: 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
	flutter-clean: 1 221M 1 4096k 0 0 18.7M 0 0:00:11 --:--:-- 0:00:11 18.6M
	flutter-clean: 54 221M 54 119M 0 0 104M 0 0:00:02 0:00:01 0:00:01 104M
	flutter-clean: 100 221M 100 221M 0 0 117M 0 0:00:01 0:00:01 --:--:-- 117M
	flutter-clean: Resolving dependencies...

kallentu / variance_example.dart

Last active December 19, 2019 17:26

	class Writer<in T> {
	void write(T value) => print(value);
	}

	class Reader<out T> {
	final T value;
	Reader(this.value);
	T read() => value;
	}

kallentu / variance_subclass_invariant.dart

Created December 17, 2019 17:33

	class ReaderWriter<inout T> {}
	class NewReaderWriter<inout T> extends LegacyReader<T> {} // OK
	class IntegerReaderWriter<inout T> extends Reader<T> {} // OK
	class StringReaderWriter<inout T> extends Writer<T> {} // OK

kallentu / variance_subclass_contravariant.dart

Created December 17, 2019 17:31

	class Writer<in T> {}
	class StringWriter<in T> extends Writer<T> {} // OK

kallentu / variance_subclass_covariant.dart

Created December 17, 2019 17:31

	class LegacyReader<T> {}
	class NewReader<out T> extends LegacyReader<T> {} // OK

	class Reader<out T> {}
	class IntegerReader<out T> extends Reader<T> {} // OK

kallentu / variance_assignment_invariant.dart

Last active December 19, 2019 17:26

	class ReaderWriter<inout T> { /* ... */ }
	main() {
	ReaderWriter<int> intReader = ReaderWriter<int>();
	}

kallentu / variance_assignment_contravariant.dart

Last active December 19, 2019 17:26

	class Writer<in T> { /* ... */ }
	main() {
	Writer<int> intWriter = Writer<Object>();
	}

kallentu / variance_assignment_covariant.dart

Last active December 19, 2019 17:26

	class Reader<out T> { /* ... */ }
	main() {
	Reader<Object> objectReader = Reader<int>();
	}

kallentu / variance_usage_fields.dart

Last active December 19, 2019 18:14

	class Reader<out T> {
	// Compile-time error: Can't use 'out' type variable 'T' in an 'in' position.
	T readableWritableValue;

	// OK
	final T readableValue;
	}

	class Writer<in T> {
	// Compile-time error: Can't use 'in' type variable 'T' in an 'out' position.