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use crate::handle::*;
use crate::*;
macro_rules! downcast {
($t1: ty, $t2: ty) => {
impl From<$t1> for $t2 {
fn from(input: $t1) -> $t2 {
<$t2>::from_handle_internal(input.into_handle())
}
}
impl From<&$t1> for $t2 {
fn from(other: &$t1) -> $t2 {
<$t2>::from_handle_internal(other.handle_ref().clone())
}
}
};
($t1: ty, $t2: ty, $($tys: ty),+) => {
downcast!($t1, $t2);
downcast!($t1, $($tys),*);
}
}
downcast!(Buffer, Handle);
downcast!(Generator, Handle);
downcast!(BufferGenerator, Generator, Handle);
downcast!(FastSineBankGenerator, Generator, Handle);
downcast!(NoiseGenerator, Generator, Handle);
downcast!(StreamingGenerator, Generator, Handle);
downcast!(Source, Handle);
downcast!(DirectSource, Source, Handle);
downcast!(AngularPannedSource, Source, Handle);
downcast!(ScalarPannedSource, Source, Handle);
downcast!(Source3D, Source, Handle);
mod cast_target {
use super::*;
pub trait CastTarget: Sized {
fn cast_from(h: &Handle) -> Result<Option<Self>>;
}
}
impl CastTarget for Handle {
fn cast_from(h: &Handle) -> Result<Option<Handle>> {
Ok(Some(h.handle_ref().clone()))
}
}
pub(crate) use cast_target::*;
macro_rules! cast {
($t: ty, $($otypes: expr),+) => {
impl CastTarget for $t {
fn cast_from(h: &Handle) -> Result<Option<$t>> {
let otype = h.get_type()?;
for i in [$($otypes),*].iter() {
if i == &otype {
return Ok(Some(<$t>::from_handle_internal((*h).clone())));
}
}
Ok(None)
}
}
}
}
cast!(Buffer, ObjectType::Buffer);
cast!(
Generator,
ObjectType::BufferGenerator,
ObjectType::StreamingGenerator,
ObjectType::NoiseGenerator,
ObjectType::FastSineBankGenerator
);
cast!(BufferGenerator, ObjectType::BufferGenerator);
cast!(NoiseGenerator, ObjectType::NoiseGenerator);
cast!(StreamingGenerator, ObjectType::StreamingGenerator);
cast!(FastSineBankGenerator, ObjectType::FastSineBankGenerator);
cast!(
Source,
ObjectType::DirectSource,
ObjectType::AngularPannedSource,
ObjectType::ScalarPannedSource,
ObjectType::Source3D
);
cast!(DirectSource, ObjectType::DirectSource);
cast!(AngularPannedSource, ObjectType::AngularPannedSource);
cast!(ScalarPannedSource, ObjectType::ScalarPannedSource);
cast!(Source3D, ObjectType::Source3D);
macro_rules! try_from {
($t: ty, $from: ty) => {
impl std::convert::TryFrom<&$from> for $t {
type Error = crate::errors::Error;
fn try_from(other: &$from) -> Result<$t> {
<$t>::cast_from(other.handle_ref())?.ok_or_else(|| crate::errors::Error::rust_error("Type mismatch"))
}
}
impl std::convert::TryFrom<$from> for $t {
type Error = crate::errors::Error;
fn try_from(other: $from) -> Result<$t> {
<$t>::cast_from(other.handle_ref())?.ok_or_else(|| crate::errors::Error::rust_error("Type mismatch"))
}
}
};
($t: ty, $t2: ty, $($ts:ty),+) => {
try_from!($t, $t2);
try_from!($t, $($ts),*);
}
}
try_from!(Buffer, Handle);
try_from!(Generator, Handle);
try_from!(BufferGenerator, Generator, Handle);
try_from!(NoiseGenerator, Generator, Handle);
try_from!(StreamingGenerator, Generator, Handle);
try_from!(FastSineBankGenerator, Generator, Handle);
try_from!(Source, Handle);
try_from!(DirectSource, Source, Handle);
try_from!(AngularPannedSource, Source, Handle);
try_from!(ScalarPannedSource, Source, Handle);
try_from!(Source3D, Source, Handle);