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builtin: add documentation for clear

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Updates #56351

Change-Id: I7b1dd29e60f71d804a6d9cba3377e28c3a5b964e
Reviewed-on: https://go-review.googlesource.com/c/go/+/462935
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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Cuong Manh Le 2023-01-21 02:36:45 +07:00 committed by Gopher Robot
parent 56a14ad4bc
commit 4fe46cee4e
1 changed files with 9 additions and 0 deletions
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9
src/builtin/builtin.go
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@ -227,6 +227,15 @@ func real(c ComplexType) FloatType
// the type of c. // the type of c.
func imag(c ComplexType) FloatType func imag(c ComplexType) FloatType
// The clear built-in function clears maps and slices.
// For maps, clear deletes all entries, resulting in an empty map.
// For slices, clear sets all elements up to the length of the slice
// to the zero value of the respective element type. If the argument
// type is a type parameter, the type parameter's type set must
// contain only map or slice types, and clear performs the operation
// implied by the type argument.
func clear[T ~[]Type | ~map[Type]Type1](t T)
// The close built-in function closes a channel, which must be either // The close built-in function closes a channel, which must be either
// bidirectional or send-only. It should be executed only by the sender, // bidirectional or send-only. It should be executed only by the sender,
// never the receiver, and has the effect of shutting down the channel after // never the receiver, and has the effect of shutting down the channel after