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# Ownership
---
# Copying
## Assignment
# Moving
## Assignment is not allowed for movable types that are not shared
## To And From Functions
# Passing
## References
References are automatically taken if the function signature specifies ref
```text
int_array : Array[I64] $ ()
float_array : Array[F64] $ ()
@ 0 .. 2 {[x]
([%ref x; y] x `push y + 1) `sync (int_array, x)
([%ref x; y] x `push y + 1) `sync (float_array, F64 $ x)
}
`log int_array // Array[I64] $ (1; 2; 3)
`log float_array // Array[F64] $ (1.0; 2.0; 3.0)
```
#### Functions that take references cannot be called with ``async`
# Shared Types
# Locking
Prevent modification until a mutation occurs
## References
# Mutating
Unlock a lock or shared target and prevents modification to everything except the lock target
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