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Diggory Blake 2018-09-18 11:39:15 +01:00
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src/interface.rs Normal file
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#[macro_export(local_inner_macros)]
macro_rules! generate_trait_def {
{
$caller:tt
name = [{ $name:ident }]
bounds = [{ $($bounds:tt)+ }]
getters = [{ $(
{ $getter:ident $t:ty }
)* }]
} => {
$crate::tt_call::tt_return! {
$caller
trait_def = [{
pub trait $name: $($bounds)+ {
$(fn $getter(&self) -> $t;)*
}
}]
}
};
}
#[macro_export(local_inner_macros)]
macro_rules! generate_trait_impl {
{
$caller:tt
name = [{ $name:ident }]
bounds = [{ $($bounds:tt)+ }]
getters = [{ $(
{ $getter:ident $t:ty }
)* }]
} => {
$crate::tt_call::tt_return! {
$caller
trait_impl = [{
impl<T: $($bounds)+> $name for T {
$(fn $getter(&self) -> $t {
$crate::Provide::<$t>::provide(self)
})*
}
}]
}
};
}
#[macro_export(local_inner_macros)]
macro_rules! private_define_interface {
{
$caller:tt
input = [{ $($input:tt)* }]
} => {
$crate::tt_call::tt_call! {
macro = [{ parse_trait_def }]
input = [{ $($input)* }]
~~> private_define_interface! {
$caller
}
}
};
{
$caller:tt
name = [{ $name:ident }]
body = [{ $(
fn $getter:ident(&self) -> $t:ty;
)* }]
$(bound = [{ $($bound:tt)* }])*
} => {
$crate::tt_call::tt_call! {
macro = [{ join }]
sep = [{ + }]
$(item = [{ $($bound)* }])*
$(item = [{ $crate::Provide<$t> }])*
~~> private_define_interface! {
$caller
name = [{ $name }]
getters = [{ $(
{ $getter $t }
)* }]
}
}
};
{
$caller:tt
name = [{ $name:ident }]
getters = [{ $($getters:tt)* }]
joined = [{ $($joined:tt)* }]
} => {
$crate::tt_call::tt_call! {
macro = [{ generate_trait_def }]
name = [{ $name }]
bounds = [{ $($joined)* }]
getters = [{ $($getters)* }]
~~> private_define_interface! {
$caller
name = [{ $name }]
getters = [{ $($getters)* }]
bounds = [{ $($joined)* }]
}
}
};
{
$caller:tt
name = [{ $name:ident }]
getters = [{ $($getters:tt)* }]
bounds = [{ $($bounds:tt)* }]
trait_def = [{ $($trait_def:tt)* }]
} => {
$crate::tt_call::tt_call! {
macro = [{ generate_trait_impl }]
name = [{ $name }]
bounds = [{ $($bounds)* }]
getters = [{ $($getters)* }]
~~> private_define_interface! {
$caller
trait_def = [{ $($trait_def)* }]
}
}
};
{
$caller:tt
trait_def = [{ $($trait_def:tt)* }]
trait_impl = [{ $($trait_impl:tt)* }]
} => {
$crate::tt_call::tt_return! {
$caller
result = [{ $($trait_def)* $($trait_impl)* }]
}
};
}
#[macro_export(local_inner_macros)]
macro_rules! define_interface {
($($input:tt)*) => (
$crate::tt_call::tt_call! {
macro = [{ private_define_interface }]
input = [{ $($input)* }]
}
);
}