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Update docs for $_ and $nil.

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This commit is contained in:
Qi Xiao 2020-09-04 22:45:04 +01:00
parent 5cb2a83959
commit 5ec11cfe2b
2 changed files with 2 additions and 5 deletions
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5
pkg/eval/builtin_ns.go
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@ -12,8 +12,7 @@ import (
// //
// A blackhole variable. // A blackhole variable.
// //
// Values assigned to it will be discarded. Trying to use its value (like `put $_`) // Values assigned to it will be discarded. Referencing it always results in $nil.
// causes an exception.
//elvdoc:var args //elvdoc:var args
// //
@ -44,8 +43,6 @@ import (
//elvdoc:var nil //elvdoc:var nil
// //
// A special value useful for representing the lack of values. // A special value useful for representing the lack of values.
//
// **WARNING**: Due to a bug, `$nil` cannot be used as a map key now.
//elvdoc:var paths //elvdoc:var paths
// //

2
pkg/eval/vars/blackhole.go
View File

@ -12,7 +12,7 @@ func (blackhole) Get() interface{} {
// NewBlackhole returns a blackhole variable. Assignments to a blackhole // NewBlackhole returns a blackhole variable. Assignments to a blackhole
// variable will be discarded, and getting a blackhole variable always returns // variable will be discarded, and getting a blackhole variable always returns
// an empty string. // nil.
func NewBlackhole() Var { func NewBlackhole() Var {
return blackhole{} return blackhole{}
} }