mirror of
https://github.com/appgurueu/modlib.git
synced 2024-07-02 14:20:25 +02:00
126 lines
2.6 KiB
Lua
126 lines
2.6 KiB
Lua
-- Localize globals
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local modlib, unpack, select, setmetatable
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= modlib, unpack, select, setmetatable
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-- Set environment
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local _ENV = {}
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setfenv(1, _ENV)
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function no_op() end
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function identity(...) return ... end
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-- TODO switch all of these to proper vargs
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function curry(func, ...)
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local args = { ... }
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return function(...) return func(unpack(args), ...) end
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end
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function curry_tail(func, ...)
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local args = { ... }
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return function(...) return func(unpack(modlib.table.concat({...}, args))) end
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end
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function curry_full(func, ...)
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local args = { ... }
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return function() return func(unpack(args)) end
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end
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function args(...)
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local args = { ... }
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return function(func) return func(unpack(args)) end
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end
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function value(val) return function() return val end end
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function values(...)
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local args = { ... }
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return function() return unpack(args) end
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end
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function memoize(func)
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return setmetatable({}, {
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__index = function(self, key)
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local value = func(key)
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self[key] = value
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return value
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end,
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__call = function(self, arg)
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return self[arg]
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end,
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__mode = "k"
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})
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end
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function compose(func, other_func)
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return function(...)
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return func(other_func(...))
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end
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end
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function override_chain(func, override)
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return function(...)
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func(...)
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return override(...)
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end
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end
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--+ Calls func using the provided arguments, deepcopies all arguments
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function call_by_value(func, ...)
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return func(unpack(modlib.table.deepcopy{...}, 1, select("#", ...)))
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end
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-- Functional wrappers for Lua's builtin metatable operators (arithmetic, concatenation, length, comparison, indexing, call)
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-- TODO (?) add operator table `["+"] = add, ...`
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function add(a, b) return a + b end
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function sub(a, b) return a - b end
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function mul(a, b) return a * b end
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function div(a, b) return a / b end
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function mod(a, b) return a % b end
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function pow(a, b) return a ^ b end
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function unm(a) return -a end
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function concat(a, b) return a .. b end
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function len(a) return #a end
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function eq(a, b) return a == b end
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function neq(a, b) return a ~= b end
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function lt(a, b) return a < b end
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function gt(a, b) return a > b end
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function le(a, b) return a <= b end
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function ge(a, b) return a >= b end
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function index(object, key) return object[key] end
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function newindex(object, key, value) object[key] = value end
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function call(object, ...) object(...) end
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-- Functional wrappers for logical operators, suffixed with _ for syntactical convenience
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function not_(a) return not a end
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_ENV["not"] = not_
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function and_(a, b) return a and b end
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_ENV["and"] = and_
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function or_(a, b) return a or b end
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_ENV["or"] = or_
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-- Export environment
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return _ENV |