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|
//! Convenience macros.
#[macro_export]
macro_rules! eprintln {
($($tt:tt)*) => {{
if $crate::is_ci() {
panic!("Forgot to remove debug-print?")
}
std::eprintln!($($tt)*)
}}
}
/// Appends formatted string to a `String`.
#[macro_export]
macro_rules! format_to {
($buf:expr) => ();
($buf:expr, $lit:literal $($arg:tt)*) => {
{ use ::std::fmt::Write as _; let _ = ::std::write!($buf, $lit $($arg)*); }
};
}
/// Generates `From` impls for `Enum E { Foo(Foo), Bar(Bar) }` enums
///
/// # Example
///
/// ```rust
/// impl_from!(Struct, Union, Enum for Adt);
/// ```
#[macro_export]
macro_rules! impl_from {
($($variant:ident $(($($sub_variant:ident),*))?),* for $enum:ident) => {
$(
impl From<$variant> for $enum {
fn from(it: $variant) -> $enum {
$enum::$variant(it)
}
}
$($(
impl From<$sub_variant> for $enum {
fn from(it: $sub_variant) -> $enum {
$enum::$variant($variant::$sub_variant(it))
}
}
)*)?
)*
};
($($variant:ident$(<$V:ident>)?),* for $enum:ident) => {
$(
impl$(<$V>)? From<$variant$(<$V>)?> for $enum$(<$V>)? {
fn from(it: $variant$(<$V>)?) -> $enum$(<$V>)? {
$enum::$variant(it)
}
}
)*
}
}
|
