Enum rsass::css::Value

pub enum Value {
    Bang(String),
    Call(String, CallArgs),
    Function(String, Option<Function>),
    Literal(CssString),
    List(Vec<Value>, Option<ListSeparator>, bool),
    Numeric(Numeric, bool),
    Color(Color, Option<String>),
    Null,
    True,
    False,
    BinOp(Box<BinOp>),
    UnaryOp(Operator, Box<Value>),
    Map(ValueMap),
    UnicodeRange(String),
    Paren(Box<Value>),
    ArgList(CallArgs),
}

A css value.

Variants

Bang(String)

A special kind of escape. Only really used for !important.

Call(String, CallArgs)

An function call that was not evaluated.

Function(String, Option<Function>)

A (callable?) function.

Literal(CssString)

A string literal.

List(Vec<Value>, Option<ListSeparator>, bool)

A comma- or space separated list of values, with or without brackets.

Numeric(Numeric, bool)

A Numeric value is a rational value with a Unit (which may be Unit::None) and flags.

The boolean flag is true for calculated values and false for literal values.

Color(Color, Option<String>)

A color value (and optionally, its source string).

Null

The null value.

True

The true boolean value.

False

The false boolean value.

BinOp(Box<BinOp>)

A binary operation, two operands and an operator. The booleans represents possible whitespace.

UnaryOp(Operator, Box<Value>)

A unary operator and its operand.

Map(ValueMap)

A map of values.

UnicodeRange(String)

A unicode range for font selections. U+NN, U+N?, U+NN-MM. The string is the entire value, including the “U+” tag.

Paren(Box<Value>)

A value in parenthesis.

ArgList(CallArgs)

An argumentt list

Implementations

impl Value

pub fn scalar<T: Into<Number>>(v: T) -> Self

Create a numeric value with no unit.

pub fn valid_css(self) -> Result<Self, InvalidCss>

Check that the value is valid in css.

pub fn type_name(&self) -> &'static str

Get the type name of this value.

pub fn is_calculation(&self) -> bool

Returns true if this is a css calc(...) function.

pub fn is_calculated(&self) -> bool

Return true if this is a calculated value.

The return of functions or operators are calculated, verbatim values are not.

pub fn into_calculated(self) -> Self

Get this value, but marked as calculated.

Make sure arithmetic operators are evaluated.

pub fn is_true(&self) -> bool

All values other than False and Null should be considered true.

pub fn is_null(&self) -> bool

Return true if this value is null.

Note that an empty unquoted string and a list containing no non-null values is also considered null.

pub fn numeric_value(self) -> Result<Numeric, Self>

Check if this value is numeric.

If it is, get the number and unit, otherwise, get the value itself as error.

pub fn unquote(self) -> Value

Unquote this value.

If the value is a quoted string, the content is unquoted.

pub fn iter_items(self) -> Vec<Value>

Get this value as iterable items.

Lists and maps have iterable items, which are returned as a vector of values. Other values are returned as a vec containing the value as a single item.

pub fn format(&self, format: Format) -> Formatted<'_, Value>

Get a reference to this Value bound to an output format.

The bound reference implements Display, so it can be written with the rust format!(...) macros or coverted with the to_string() method.

Example

assert_eq!(
    Value::scalar(42).format(Default::default()).to_string(),
    "42",
);

pub fn introspect(&self) -> String

Format this value for error messages.

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl From<&str> for Value

fn from(s: &str) -> Value

Converts to this type from the input type.

impl From<BinOp> for Value

fn from(value: BinOp) -> Self

Converts to this type from the input type.

impl<C: Into<Color>> From<C> for Value

fn from(c: C) -> Value

Converts to this type from the input type.

impl From<CallArgs> for Value

fn from(args: CallArgs) -> Value

Converts to this type from the input type.

impl From<CssString> for Value

fn from(s: CssString) -> Value

Converts to this type from the input type.

impl From<Numeric> for Value

fn from(v: Numeric) -> Value

Converts to this type from the input type.

impl From<Selectors> for Value

fn from(sel: Selectors) -> Value

Create a css Value representing a set of selectors.

The result will be a comma-separated list of space-separated lists of strings, or null if this is a root (empty) selector.

impl From<String> for Value

fn from(s: String) -> Value

Converts to this type from the input type.

impl From<bool> for Value

fn from(v: bool) -> Value

Converts to this type from the input type.

impl PartialEq for Value

Some Values are equal according to spec even with some implementation differences.

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Value

fn partial_cmp(&self, other: &Value) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<Value> for Color

type Error = String

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for CssString

type Error = String

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for MediaArgs

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for Numeric

type Error = IsNot

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for ValueMap

type Error = String

The type returned in the event of a conversion error.

fn try_from(v: Value) -> Result<Self, String>

Performs the conversion.

impl TryFrom<Value> for Selector

type Error = BadSelector

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for Selectors

type Error = BadSelector

The type returned in the event of a conversion error.

fn try_from(v: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for String

type Error = String

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for Value

impl StructuralEq for Value