Struct EnvFunction 

pub struct EnvFunction {
    pub name: SubstitutionArgument<EnvName>,
    pub fallback: Option<ArbitraryDeclarationValue>,
}

Data specific to an env() function.

Fields

name: SubstitutionArgument<EnvName>

The referenced environment variable name.

fallback: Option<ArbitraryDeclarationValue>

The fallback for this function, if any.

Implementations

impl EnvFunction

pub fn parse( input: &mut Parser<'_>, context: &mut SubstitutionParserContext<'_>, ) -> Result<Self, ParseError>

Parses the env() function arguments according to its argument grammar and syntax:

• = env(, ?)
• env() = env( <integer [0,∞]>*, ?)

TODO(Bug 2081127) - Support the optional index arguments.

pub fn replace<'a>( &'a self, source: &'a VariableValue, context: &mut SubstitutionReplacementContext<'a, '_, '_, '_>, ) -> Result<Substitution<'a>, ()>

Replaces the env() function with its substitution value. https://drafts.csswg.org/css-env-1/#substitute-an-env

pub fn replace_name<'a>( &'a self, source: &'a VariableValue, context: &mut SubstitutionReplacementContext<'a, '_, '_, '_>, ) -> ParsedArgument<'a, EnvName>

Returns the name, substituting and parsing it first if it has references.

pub fn for_each_unparsed_value<F>(&self, f: F)

where F: FnMut(&ArbitraryDeclarationValue),

Calls f for each arbitrary declaration value nested in the function.

Trait Implementations

impl Clone for EnvFunction

fn clone(&self) -> EnvFunction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EnvFunction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MallocSizeOf for EnvFunction

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl PartialEq for EnvFunction

fn eq(&self, other: &EnvFunction) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for EnvFunction

impl ToShmem for EnvFunction

fn to_shmem(&self, builder: &mut SharedMemoryBuilder) -> Result<Self>

Clones this value into a form suitable for writing into a SharedMemoryBuilder.