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Stephen Chung
2020-08-23 17:22:39 +08:00
parent 196e145c96
commit e2f271644a
10 changed files with 127 additions and 12 deletions
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doc/src/language/fn-closure.md
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@@ -35,7 +35,8 @@ The actual implementation de-sugars to:
1. Keeping track of what variables are accessed inside the anonymous function,
2. If a variable is not defined within the anonymous function's scope, it is looked up _outside_ the function and in the current execution scope - where the anonymous function is created.
2. If a variable is not defined within the anonymous function's scope, it is looked up _outside_ the function and
in the current execution scope - where the anonymous function is created.
3. The variable is added to the parameters list of the anonymous function, at the front.
@@ -43,7 +44,8 @@ The actual implementation de-sugars to:
An [anonymous function] which captures an external variable is the only way to create a reference-counted shared value in Rhai.
5. The shared value is then [curried][currying] into the [function pointer] itself, essentially carrying a reference to that shared value and inserting it into future calls of the function.
5. The shared value is then [curried][currying] into the [function pointer] itself, essentially carrying a reference to that shared value
and inserting it into future calls of the function.
This process is called _Automatic Currying_, and is the mechanism through which Rhai simulates normal closures.