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