Bruce/lua-immutable
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Updated to include info about __hash.

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Bruce Hill 2018-04-23 16:46:58 -07:00
parent b06b127ce5
commit dc2f524d29
2 changed files with 2 additions and 3 deletions
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3
README.md
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@ -95,8 +95,7 @@ If you override `__index` instead of `__missing`, the function you provide will
The library also defines a `__hash` metamethod that returns the hash value used internally for instances. Overriding this value does not affect the underlying implementation, but you may find it useful for overriding `__index`:
```lua
local Foo
Foo = immutable({"x","y"}, {
local Foo = immutable({"x","y"}, {
classvar = 23,
__index = function(self, key)
local cls = getmetatable(self)

2
implementation.md
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@ -6,7 +6,7 @@ function immutable(fields, class_fields)
__index = function(self, key)
local cls = getmetatable(self)
key = cls.__indices[key] or key
local data = cls.__instances[extract_hash(self)][self]
local data = cls.__instances[cls.__hash(self)][self]
return data[key] or cls[key]
end,
...also: __len, __pairs, __ipairs, __tostring, from_table, is_instance...