javier
c5037dd716
This PR contains the work done to update the library and the attached example project to use the Swift 6.4 computer as a minimum supported version and also, to use the latest features introduced in it. Reviewed-on: #1 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
32 lines
1.1 KiB
Swift
32 lines
1.1 KiB
Swift
internal import CPlaydate
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extension Lua {
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/// A handle to a Lua-owned object. Wraps `LuaUDObject`.
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public struct UDObject {
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let pointer: OpaquePointer
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/// Prevents garbage collection until a balancing `release()`. Returns `self`.
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@discardableResult
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public func retain() -> UDObject {
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UDObject(pointer: luaAPI.pointee.retainObject.unsafelyUnwrapped(pointer).unsafelyUnwrapped)
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}
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/// Balances one `retain()`.
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public func release() {
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luaAPI.pointee.releaseObject.unsafelyUnwrapped(pointer)
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}
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/// Sets user-value `slot` (1-based) to the top stack value.
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public func setUserValue(slot: UInt32) {
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luaAPI.pointee.setUserValue.unsafelyUnwrapped(pointer, slot)
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}
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/// Pushes user-value `slot` (1-based); returns its stack position, or `nil` if 0.
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@discardableResult
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public func getUserValue(slot: UInt32) -> Int? {
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let position = luaAPI.pointee.getUserValue.unsafelyUnwrapped(pointer, slot)
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return position == 0 ? nil : Int(position)
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}
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}
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}
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