Module substitution 

Arbitrary substitution functions. https://drafts.csswg.org/css-values-5/#arbitrary-substitution-function

Re-exports

pub use self::attr::AttrFunction;

pub use self::env::EnvFunction;

pub use self::var::VarFunction;

Modules

attr

The attr() arbitrary substitution function. https://drafts.csswg.org/css-values-5/#funcdef-attr

env

The env() arbitrary substitution function. https://drafts.csswg.org/css-env-1/#funcdef-env

var

The var() arbitrary substitution function. https://drafts.csswg.org/css-variables-2/#funcdef-var

Structs

ArbitraryDeclarationValue

An arbitrary <declaration-value> nested inside of a substitution function.

AttrTaint

In CSS Values and Units, values produced by attr() are considered attr()-tainted, as are functions that contain an attr()-tainted value. Using an attr()-tainted value as or in a makes a declaration invalid at computed-value time. https://drafts.csswg.org/css-values-5/#attr-security

AttrTaintedRange

For a CSS string, the range, counted in bytes, that is attr()-tainted.

ParsedArgument

The result of substituting and parsing a SubstitutionArgument.

ReferenceFlags

Set of flags to references this custom property makes.

References

A struct holding information about the external references to that a custom property value may have.

Substitution

The result of substituting a value or a single substitution function.

SubstitutionFunctionReference

A reference to a substitution function like env() / var() / attr().

SubstitutionParserContext

Context for parsing an arbitrary substitution function.

SubstitutionReplacementContext

Context for replacing an arbitrary substitution function with its value.

SubstitutionResult

Result of var(), env(), and attr() substitution.

Enums

SubstitutionArgument

An argument of a substitution function that is parsed as T at substitution time.

SubstitutionFunction

A substitution function along with the data specific to it.

SubstitutionFunctionKind

Substitution function name.

Functions

parse_declaration_value

https://drafts.csswg.org/css-syntax-3/#typedef-declaration-value

parse_declaration_value_block 🔒

Like parse_declaration_value, but accept ! and ; since they are only invalid at the top level.

parse_optional_fallback 🔒

substitute

Replace var(), env(), and attr() functions, returning the resulting CSS string.