|
|
@@ -299,9 +299,9 @@ mod tests { |
|
|
|
|
|
|
|
#[test] |
|
|
|
fn example_for_why_you_should_use_fully_qualified_names() { |
|
|
|
struct A; |
|
|
|
pub struct A; |
|
|
|
|
|
|
|
trait Devious { |
|
|
|
pub trait Devious { |
|
|
|
fn abc(&self) -> isize { 42 } |
|
|
|
fn xyz(&self) -> isize { 42 } |
|
|
|
} |
|
|
@@ -319,13 +319,32 @@ mod tests { |
|
|
|
<A as Devious>::abc(&$x) |
|
|
|
} |
|
|
|
} |
|
|
|
let c = <A as ::tests::example_for_why_you_should_use_fully_qualified_names::Devious>::abc(&a); |
|
|
|
|
|
|
|
macro_rules! you_gotta_be_wiser { |
|
|
|
{ [[ $x:ident ]] } => { |
|
|
|
<A as ::tests::example_for_why_you_should_use_fully_qualified_names::Devious>::abc(&$x) |
|
|
|
} |
|
|
|
//{ [[ $x:ident ]] } => { |
|
|
|
// <A as crate::tests::example_for_why_you_should_use_fully_qualified_names::Devious>::abc(&$x) |
|
|
|
//}; |
|
|
|
|
|
|
|
//{ -^-^- $x:ident -^-^- } => {{ |
|
|
|
// // invoking the version that's inside `the_upside_down` |
|
|
|
// use crate::tests::example_for_why_you_should_use_fully_qualified_names::the_upside_down::Devious as OtherDevious; |
|
|
|
// <A as crate::tests::example_for_why_you_should_use_fully_qualified_names::the_upside_down::OtherDevious>::xyz(&$x) |
|
|
|
//}}; |
|
|
|
} |
|
|
|
|
|
|
|
assert_eq!(didnt_see_it_coming!{ a <-> }, 42); |
|
|
|
|
|
|
|
assert_eq!(you_gotta_be_wiser!{ [[ a ]] }, 42); |
|
|
|
//assert_eq!(you_gotta_be_wiser!{ -^-^- a -^-^- }, -42); |
|
|
|
|
|
|
|
/// muhaha |
|
|
|
fn the_upside_down(a: &A) -> isize { |
|
|
|
/// we have our own 'Devious' down here... |
|
|
|
trait Devious { |
|
|
|
pub trait Devious { |
|
|
|
fn abc(&self) -> isize { -42 } |
|
|
|
fn xyz(&self) -> isize { -42 } |
|
|
|
} |
|
|
@@ -339,4 +358,19 @@ mod tests { |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
#[test] |
|
|
|
fn make_adder_with_supplied_name_working_example() { |
|
|
|
macro_rules! make_adder_fn { |
|
|
|
($f:ident, $n:expr) => { |
|
|
|
fn $f(rhs: i32) -> i32 { |
|
|
|
$n + rhs |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
make_adder_fn!(add_42, 42); |
|
|
|
|
|
|
|
assert_eq!(add_42(0), 42); |
|
|
|
assert_eq!(add_42(42), 84); |
|
|
|
} |
|
|
|
|
|
|
|
} |