Enum CalcExpr 

pub enum CalcExpr {
    Value(LengthPercentage),
    Number(f32),
    Add(Box<CalcExpr>, Box<CalcExpr>),
    Sub(Box<CalcExpr>, Box<CalcExpr>),
    Mul(Box<CalcExpr>, Box<CalcExpr>),
    Div(Box<CalcExpr>, Box<CalcExpr>),
}

A calc() expression node.

The tree is built bottom-up: leaves are length-percentage values or unit-less numbers; inner nodes apply one of the four arithmetic operators. Operator precedence and parenthesization are handled by the serializer.

Variants

Value(LengthPercentage)

Length-percentage leaf.

Number(f32)

Unit-less number leaf (used as a multiplier or divisor).

Add(Box<CalcExpr>, Box<CalcExpr>)

<lhs> + <rhs>.

Sub(Box<CalcExpr>, Box<CalcExpr>)

<lhs> - <rhs>.

Mul(Box<CalcExpr>, Box<CalcExpr>)

<lhs> * <rhs>.

Div(Box<CalcExpr>, Box<CalcExpr>)

<lhs> / <rhs>.

Implementations

impl CalcExpr

pub fn value(v: impl Into<LengthPercentage>) -> Self

Length-percentage leaf.

pub fn number(v: f32) -> Self

Unit-less number leaf.

pub fn add(self, rhs: CalcExpr) -> Self

self + rhs. Builder method intentionally named the same as the CSS operator; not a std::ops::Add implementation.

pub fn sub(self, rhs: CalcExpr) -> Self

self - rhs.

pub fn mul(self, rhs: CalcExpr) -> Self

self * rhs.

pub fn div(self, rhs: CalcExpr) -> Self

self / rhs.

Trait Implementations

impl Clone for CalcExpr

fn clone(&self) -> CalcExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CalcExpr

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

Formats the value using the given formatter.

impl PartialEq for CalcExpr

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for CalcExpr

impl ToCss for CalcExpr

fn to_css(&self, dest: &mut dyn Write) -> Result

Write the CSS representation of self into dest.

fn to_css_string(&self) -> String

Convenience: allocate a fresh String and write into it.