libwren-sys 0.1.0

FFI bindings for the wren embedded programming language
Documentation 
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var map = {}
System.print(map.count) // expect: 0
map["one"] = "value"
System.print(map.count) // expect: 1
map["two"] = "value"
System.print(map.count) // expect: 2
map["three"] = "value"
System.print(map.count) // expect: 3

// Adding existing key does not increase count.
map["two"] = "new value"
System.print(map.count) // expect: 3