Enum Token 

pub enum Token<'a> {
    Ident(CowRcStr<'a>),
    AtKeyword(CowRcStr<'a>),
    Hash(CowRcStr<'a>),
    IDHash(CowRcStr<'a>),
    QuotedString(CowRcStr<'a>),
    UnquotedUrl(CowRcStr<'a>),
    Delim(char),
    Number {
        has_sign: bool,
        value: f32,
        int_value: Option<i32>,
    },
    Percentage {
        has_sign: bool,
        unit_value: f32,
        int_value: Option<i32>,
    },
    Dimension {
        has_sign: bool,
        value: f32,
        int_value: Option<i32>,
        unit: CowRcStr<'a>,
    },
    WhiteSpace(&'a str),
    Comment(&'a str),
    Colon,
    Semicolon,
    Comma,
    IncludeMatch,
    DashMatch,
    PrefixMatch,
    SuffixMatch,
    SubstringMatch,
    CDO,
    CDC,
    Function(CowRcStr<'a>),
    ParenthesisBlock,
    SquareBracketBlock,
    CurlyBracketBlock,
    BadUrl(CowRcStr<'a>),
    BadString(CowRcStr<'a>),
    CloseParenthesis,
    CloseSquareBracket,
    CloseCurlyBracket,
}

One of the pieces the CSS input is broken into.

Some components use Cow in order to borrow from the original input string and avoid allocating/copying when possible.

Variants

Ident(CowRcStr<'a>)

A <ident-token>

AtKeyword(CowRcStr<'a>)

A <at-keyword-token>

The value does not include the @ marker.

Hash(CowRcStr<'a>)

A <hash-token> with the type flag set to “unrestricted”

The value does not include the # marker.

IDHash(CowRcStr<'a>)

A <hash-token> with the type flag set to “id”

The value does not include the # marker.

QuotedString(CowRcStr<'a>)

A <string-token>

The value does not include the quotes.

UnquotedUrl(CowRcStr<'a>)

A <url-token>

The value does not include the url( ) markers. Note that url( <string-token> ) is represented by a Function token.

Delim(char)

A <delim-token>

Number

A <number-token>

Fields

has_sign: bool

Whether the number had a + or - sign.

This is used is some cases like the <An+B> micro syntax. (See the parse_nth function.)

value: f32

The value as a float

int_value: Option<i32>

If the origin source did not include a fractional part, the value as an integer.

Percentage

A <percentage-token>

Fields

has_sign: bool

Whether the number had a + or - sign.

unit_value: f32

The value as a float, divided by 100 so that the nominal range is 0.0 to 1.0.

int_value: Option<i32>

If the origin source did not include a fractional part, the value as an integer. It is not divided by 100.

Dimension

A <dimension-token>

Fields

has_sign: bool

Whether the number had a + or - sign.

This is used is some cases like the <An+B> micro syntax. (See the parse_nth function.)

value: f32

The value as a float

int_value: Option<i32>

If the origin source did not include a fractional part, the value as an integer.

unit: CowRcStr<'a>

The unit, e.g. “px” in 12px

WhiteSpace(&'a str)

A <whitespace-token>

Comment(&'a str)

A comment.

The CSS Syntax spec does not generate tokens for comments, But we do, because we can (borrowed &str makes it cheap).

The value does not include the /* */ markers.

Colon

A : <colon-token>

Semicolon

A ; <semicolon-token>

Comma

A , <comma-token>

IncludeMatch

A ~= <include-match-token>

DashMatch

A |= <dash-match-token>

PrefixMatch

A ^= <prefix-match-token>

SuffixMatch

A $= <suffix-match-token>

SubstringMatch

A *= <substring-match-token>

CDO

A <!-- <CDO-token>

CDC

A --> <CDC-token>

Function(CowRcStr<'a>)

A <function-token>

The value (name) does not include the ( marker.

ParenthesisBlock

A <(-token>

SquareBracketBlock

A <[-token>

CurlyBracketBlock

A <{-token>

BadUrl(CowRcStr<'a>)

A <bad-url-token>

This token always indicates a parse error.

BadString(CowRcStr<'a>)

A <bad-string-token>

This token always indicates a parse error.

CloseParenthesis

A <)-token>

When obtained from one of the Parser::next* methods, this token is always unmatched and indicates a parse error.

CloseSquareBracket

A <]-token>

When obtained from one of the Parser::next* methods, this token is always unmatched and indicates a parse error.

CloseCurlyBracket

A <}-token>

When obtained from one of the Parser::next* methods, this token is always unmatched and indicates a parse error.

Implementations

impl Token<'_>

pub fn is_parse_error(&self) -> bool

Return whether this token represents a parse error.

BadUrl and BadString are tokenizer-level parse errors.

CloseParenthesis, CloseSquareBracket, and CloseCurlyBracket are unmatched and therefore parse errors when returned by one of the Parser::next* methods.

impl Token<'_>

pub fn serialization_type(&self) -> TokenSerializationType

Categorize a token into a type that determines when /**/ needs to be inserted between two tokens when serialized next to each other without whitespace in between.

See the TokenSerializationType::needs_separator_when_before method.

Trait Implementations

impl<'a> Clone for Token<'a>

fn clone(&self) -> Token<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Token<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for Token<'a>

fn eq(&self, other: &Token<'a>) -> 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 ToCss for Token<'_>

fn to_css<W>(&self, dest: &mut W) -> Result

where W: Write,

Serialize self in CSS syntax, writing to dest.

fn to_css_string(&self) -> String

Serialize self in CSS syntax and return a string.

impl<'a> StructuralPartialEq for Token<'a>