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Doc fixes.

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This commit is contained in:
Stephen Chung 2022-02-10 08:31:41 +08:00
parent 8c5de09446
commit 1c89c6be4f
2 changed files with 13 additions and 6 deletions
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16
src/reify.rs
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@ -1,12 +1,19 @@
/// Runs `$code` if `$old` is of type `$t`. /// Macro to cast an identifier or expression to another type with type checks.
/// ///
/// This macro is primarily used for type casting between known types. /// Runs _code_ if _variable_ or _expression_ is of type _type_, otherwise run _fallback_.
///
/// # Syntax
///
/// * `reify!(`_variable_ or _expression_`,|`_temp-variable_`: `_type_`|` _code_`,` `||` _fallback_ `)`
/// * `reify!(`_variable_ or _expression_`,|`_temp-variable_`: `_type_`|` _code_ `)`
/// * `reify!(`_variable_ or _expression_ `=>` `Option<`_type_`>` `)`
/// * `reify!(`_variable_ or _expression_ `=>` _type_ `)`
#[macro_export] #[macro_export]
macro_rules! reify { macro_rules! reify {
($old:ident, |$new:ident : $t:ty| $code:expr, || $fallback:expr) => {{ ($old:ident, |$new:ident : $t:ty| $code:expr, || $fallback:expr) => {{
if std::any::TypeId::of::<$t>() == std::any::Any::type_id(&$old) { if std::any::TypeId::of::<$t>() == std::any::Any::type_id(&$old) {
// SAFETY: This is safe because we check to make sure the two types are // SAFETY: This is safe because we already checked to make sure the two types
// actually the same type. // are actually the same.
let $new: $t = unsafe { std::mem::transmute_copy(&std::mem::ManuallyDrop::new($old)) }; let $new: $t = unsafe { std::mem::transmute_copy(&std::mem::ManuallyDrop::new($old)) };
$code $code
} else { } else {
@ -17,6 +24,7 @@ macro_rules! reify {
let old = $old; let old = $old;
reify!(old, |$new: $t| $code, || $fallback) reify!(old, |$new: $t| $code, || $fallback)
}}; }};
($old:ident, |$new:ident : $t:ty| $code:expr) => { ($old:ident, |$new:ident : $t:ty| $code:expr) => {
reify!($old, |$new: $t| $code, || ()) reify!($old, |$new: $t| $code, || ())
}; };

3
src/types/parse_error.rs
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@ -10,8 +10,7 @@ use std::fmt;
#[cfg(feature = "no_std")] #[cfg(feature = "no_std")]
use std::prelude::v1::*; use std::prelude::v1::*;
/// _(internals)_ Error encountered when tokenizing the script text. /// Error encountered when tokenizing the script text.
/// Exported under the `internals` feature only.
#[derive(Debug, Eq, PartialEq, Clone, Hash)] #[derive(Debug, Eq, PartialEq, Clone, Hash)]
#[non_exhaustive] #[non_exhaustive]
pub enum LexError { pub enum LexError {