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use super::*; pub trait GodotType: Sized { fn to_variant(&self) -> Variant; fn from_variant(variant: &Variant) -> Option<Self>; fn from_sys_variant(variant: &sys::godot_variant) -> Option<Self> { Self::from_variant(Variant::cast_ref(variant)) } } impl GodotType for () { fn to_variant(&self) -> Variant { Variant::new() } fn from_variant(variant: &Variant) -> Option<Self> { if variant.get_type() == VariantType::Nil { Some(()) } else { None } } } macro_rules! godot_int_impl { ($ty:ty) => ( impl GodotType for $ty { fn to_variant(&self) -> Variant { unsafe { let mut ret = sys::godot_variant::default(); (get_api().godot_variant_new_int)(&mut ret, i64::from(*self)); Variant(ret) } } fn from_variant(variant: &Variant) -> Option<Self> { unsafe { let api = get_api(); if (api.godot_variant_get_type)(&variant.0) == sys::godot_variant_type::GODOT_VARIANT_TYPE_INT { Some((api.godot_variant_as_int)(&variant.0) as Self) } else { None } } } } ) } godot_int_impl!(i8); godot_int_impl!(i16); godot_int_impl!(i32); godot_int_impl!(i64); macro_rules! godot_uint_impl { ($ty:ty) => ( impl GodotType for $ty { fn to_variant(&self) -> Variant { unsafe { let mut ret = sys::godot_variant::default(); (get_api().godot_variant_new_uint)(&mut ret, u64::from(*self)); Variant(ret) } } fn from_variant(variant: &Variant) -> Option<Self> { unsafe { let api = get_api(); if (api.godot_variant_get_type)(&variant.0) == sys::godot_variant_type::GODOT_VARIANT_TYPE_INT { Some((api.godot_variant_as_uint)(&variant.0) as Self) } else { None } } } } ) } godot_uint_impl!(u8); godot_uint_impl!(u16); godot_uint_impl!(u32); godot_uint_impl!(u64); impl GodotType for f32 { fn to_variant(&self) -> Variant { unsafe { let mut ret = sys::godot_variant::default(); (get_api().godot_variant_new_real)(&mut ret, f64::from(*self)); Variant(ret) } } fn from_variant(variant: &Variant) -> Option<Self> { unsafe { let api = get_api(); if (api.godot_variant_get_type)(&variant.0) == sys::godot_variant_type::GODOT_VARIANT_TYPE_REAL { Some((api.godot_variant_as_real)(&variant.0) as Self) } else { None } } } } impl GodotType for f64 { fn to_variant(&self) -> Variant { unsafe { let mut ret = sys::godot_variant::default(); (get_api().godot_variant_new_real)(&mut ret, *self); Variant(ret) } } fn from_variant(variant: &Variant) -> Option<Self> { unsafe { let api = get_api(); if (api.godot_variant_get_type)(&variant.0) == sys::godot_variant_type::GODOT_VARIANT_TYPE_REAL { Some((api.godot_variant_as_real)(&variant.0) as Self) } else { None } } } } impl GodotType for String { fn to_variant(&self) -> Variant { Variant::from_str(&self) } fn from_variant(variant: &Variant) -> Option<Self> { unsafe { let api = get_api(); if (api.godot_variant_get_type)(&variant.0) == sys::godot_variant_type::GODOT_VARIANT_TYPE_STRING { let mut gd_variant = (api.godot_variant_as_string)(&variant.0); let tmp = (api.godot_string_utf8)(&gd_variant); let ret = ::std::ffi::CStr::from_ptr((api.godot_char_string_get_data)(&tmp) as *const _) .to_string_lossy() .into_owned(); (api.godot_string_destroy)(&mut gd_variant); Some(ret) } else { None } } } }