forked from mirrors/gecko-dev
83c7733c7c
No behavior change, but simplifies the following patch. Differential Revision: https://phabricator.services.mozilla.com/D155180
98 lines
2.6 KiB
Rust
98 lines
2.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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//! Various macro helpers.
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macro_rules! exclusive_value {
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(($value:ident, $set:expr) => $ident:path) => {
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if $value.intersects($set) {
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return Err(());
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} else {
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$ident
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}
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};
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}
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#[cfg(feature = "gecko")]
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macro_rules! impl_gecko_keyword_conversions {
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($name:ident, $utype:ty) => {
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impl From<$utype> for $name {
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fn from(bits: $utype) -> $name {
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$name::from_gecko_keyword(bits)
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}
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}
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impl From<$name> for $utype {
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fn from(v: $name) -> $utype {
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v.to_gecko_keyword()
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}
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}
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};
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}
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macro_rules! trivial_to_computed_value {
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($name:ty) => {
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impl $crate::values::computed::ToComputedValue for $name {
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type ComputedValue = $name;
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fn to_computed_value(&self, _: &$crate::values::computed::Context) -> Self {
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self.clone()
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}
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fn from_computed_value(other: &Self) -> Self {
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other.clone()
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}
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}
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};
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}
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/// A macro to parse an identifier, or return an `UnexpectedIdent` error
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/// otherwise.
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///
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/// FIXME(emilio): The fact that `UnexpectedIdent` is a `SelectorParseError`
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/// doesn't make a lot of sense to me.
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macro_rules! try_match_ident_ignore_ascii_case {
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($input:expr, $( $match_body:tt )*) => {{
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let location = $input.current_source_location();
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let ident = $input.expect_ident_cloned()?;
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match_ignore_ascii_case! { &ident,
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$( $match_body )*
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_ => return Err(location.new_custom_error(
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::selectors::parser::SelectorParseErrorKind::UnexpectedIdent(ident.clone())
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))
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}
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}}
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}
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#[cfg(feature = "servo")]
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macro_rules! local_name {
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($s:tt) => {
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$crate::values::GenericAtomIdent(html5ever::local_name!($s))
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};
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}
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#[cfg(feature = "servo")]
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macro_rules! ns {
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() => {
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$crate::values::GenericAtomIdent(html5ever::ns!())
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};
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($s:tt) => {
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$crate::values::GenericAtomIdent(html5ever::ns!($s))
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};
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}
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#[cfg(feature = "gecko")]
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macro_rules! local_name {
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($s:tt) => {
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$crate::values::AtomIdent(atom!($s))
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};
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}
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/// Asserts the size of a type at compile time.
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macro_rules! size_of_test {
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($t: ty, $expected_size: expr) => {
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#[cfg(target_pointer_width = "64")]
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const_assert_eq!(std::mem::size_of::<$t>(), $expected_size);
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};
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}
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