63 lines
1.7 KiB
Rust
63 lines
1.7 KiB
Rust
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#[macro_escape];
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// Create the traits needed to do fancy operator oveloading.
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// This is a meta version of
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// http://smallcultfollowing.com/babysteps/blog/2012/10/04/refining-traits-slash-impls/
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//
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// Hopefully future version of the language will make this useless.
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macro_rules! double_dispatch_binop_decl_trait(
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($t: ident, $trhs: ident) => (
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pub trait $trhs<N, Res> {
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fn $trhs(&self, other: &$t<N>) -> Res;
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}
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)
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)
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// Macro driving the `Mul` trait to use the related trait for double redispatch.
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macro_rules! mul_redispatch_impl(
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($t: ident, $trhs: ident) => (
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impl<N, Rhs: $trhs<N, Res>, Res> Mul<Rhs, Res> for $t<N> {
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#[inline(always)]
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fn mul(&self, other: &Rhs) -> Res {
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other.$trhs(self)
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}
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}
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)
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)
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// Macro driving the `Div` trait to use the related trait for double redispatch.
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macro_rules! div_redispatch_impl(
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($t: ident, $trhs: ident) => (
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impl<N, Rhs: $trhs<N, Res>, Res> Div<Rhs, Res> for $t<N> {
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#[inline(always)]
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fn div(&self, other: &Rhs) -> Res {
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other.$trhs(self)
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}
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}
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)
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)
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// Macro driving the `Div` trait to use the related trait for double redispatch.
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macro_rules! add_redispatch_impl(
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($t: ident, $trhs: ident) => (
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impl<N, Rhs: $trhs<N, Res>, Res> Add<Rhs, Res> for $t<N> {
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#[inline(always)]
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fn add(&self, other: &Rhs) -> Res {
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other.$trhs(self)
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}
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}
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)
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)
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// Macro driving the `Div` trait to use the related trait for double redispatch.
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macro_rules! sub_redispatch_impl(
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($t: ident, $trhs: ident) => (
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impl<N, Rhs: $trhs<N, Res>, Res> Sub<Rhs, Res> for $t<N> {
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#[inline(always)]
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fn sub(&self, other: &Rhs) -> Res {
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other.$trhs(self)
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}
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}
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)
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)
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