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https://github.com/servo/servo.git
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c5aa2cb986
This patch replaces the handwritten MallocSizeOf implementation for PropertyDeclaration with a derived one, which gives much more thorough measurement. This requires (a) deriving MallocSizeOf for a *lot* of additional types (most of which already have `derive(HeapSizeOf)` in Servo builds), and (b) implementing MallocSizeOf for a few more types in the `malloc_size_of` crate. These changes would significantly improve the reporting coverage for gmail if it weren't for the fact that SpecifiedUrl isn't measured due to a lack of clarity about its fields; that can be fixed as a follow-up once bug 1397971 has landed.
126 lines
4.3 KiB
Rust
126 lines
4.3 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 http://mozilla.org/MPL/2.0/. */
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//! Various macro helpers.
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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 `UnexpectedIndent` 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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($ident:expr, $( $match_body:tt )*) => {
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let __ident = $ident;
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(match_ignore_ascii_case! { &*__ident,
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$( $match_body )*
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_ => Err(()),
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})
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.map_err(|()| {
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::selectors::parser::SelectorParseError::UnexpectedIdent(__ident.clone()).into()
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})
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}
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}
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macro_rules! define_numbered_css_keyword_enum {
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($name: ident: $( $css: expr => $variant: ident = $value: expr ),+,) => {
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define_numbered_css_keyword_enum!($name: $( $css => $variant = $value ),+);
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};
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($name: ident: $( $css: expr => $variant: ident = $value: expr ),+) => {
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#[allow(non_camel_case_types, missing_docs)]
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#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
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#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf, Deserialize, Serialize))]
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pub enum $name {
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$( $variant = $value ),+
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}
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impl $crate::parser::Parse for $name {
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fn parse<'i, 't>(
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_context: &$crate::parser::ParserContext,
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input: &mut ::cssparser::Parser<'i, 't>,
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) -> Result<$name, ::style_traits::ParseError<'i>> {
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try_match_ident_ignore_ascii_case! { input.expect_ident()?,
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$( $css => Ok($name::$variant), )+
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}
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}
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}
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impl ::style_traits::values::ToCss for $name {
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fn to_css<W>(&self, dest: &mut W) -> ::std::fmt::Result
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where
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W: ::std::fmt::Write,
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{
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match *self {
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$( $name::$variant => dest.write_str($css) ),+
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}
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}
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}
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}
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}
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/// A macro for implementing `ToComputedValue`, and `Parse` traits for
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/// the enums defined using `define_css_keyword_enum` macro.
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///
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/// NOTE: We should either move `Parse` trait to `style_traits`
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/// or `define_css_keyword_enum` macro to this crate, but that
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/// may involve significant cleanup in both the crates.
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macro_rules! add_impls_for_keyword_enum {
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($name:ident) => {
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impl $crate::parser::Parse for $name {
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#[inline]
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fn parse<'i, 't>(
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_context: &$crate::parser::ParserContext,
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input: &mut ::cssparser::Parser<'i, 't>,
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) -> Result<Self, ::style_traits::ParseError<'i>> {
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$name::parse(input)
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}
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}
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trivial_to_computed_value!($name);
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};
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}
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macro_rules! define_keyword_type {
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($name: ident, $css: expr) => {
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#[allow(missing_docs)]
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#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
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#[derive(Animate, Clone, ComputeSquaredDistance, Copy, PartialEq)]
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#[derive(ToAnimatedZero, ToComputedValue, ToCss)]
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pub struct $name;
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impl fmt::Debug for $name {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.write_str($css)
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}
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}
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impl $crate::parser::Parse for $name {
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fn parse<'i, 't>(
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_context: &$crate::parser::ParserContext,
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input: &mut ::cssparser::Parser<'i, 't>
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) -> Result<$name, ::style_traits::ParseError<'i>> {
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input.expect_ident_matching($css).map(|_| $name).map_err(|e| e.into())
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}
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}
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impl $crate::values::animated::AnimatedValueAsComputed for $name {}
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};
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}
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