Enum rustc_lexer::LiteralKind

pub enum LiteralKind {
    Int {
        base: Base,
        empty_int: bool,
    },
    Float {
        base: Base,
        empty_exponent: bool,
    },
    Char {
        terminated: bool,
    },
    Byte {
        terminated: bool,
    },
    Str {
        terminated: bool,
    },
    ByteStr {
        terminated: bool,
    },
    CStr {
        terminated: bool,
    },
    RawStr {
        n_hashes: Option<u8>,
    },
    RawByteStr {
        n_hashes: Option<u8>,
    },
    RawCStr {
        n_hashes: Option<u8>,
    },
}

Enum representing the literal types supported by the lexer.

Note that the suffix is not considered when deciding the LiteralKind in this type. This means that float literals like 1f32 are classified by this type as Int. (Compare against rustc_ast::token::LitKind and rustc_ast::ast::LitKind).

Variants

Int

Fields

base: Base

empty_int: bool

“12_u8”, “0o100”, “0b120i99”, “1f32”.

Float

Fields

base: Base

empty_exponent: bool

“12.34f32”, “1e3”, but not “1f32”.

Char

Fields

terminated: bool

“‘a’”, “‘\’”, “‘’‘”, “’;”

Byte

Fields

terminated: bool

“b’a’”, “b’\‘”, “b’‘’”, “b’;”

Str

Fields

terminated: bool

““abc”“, ““abc”

ByteStr

Fields

terminated: bool

“b“abc”“, “b“abc”

CStr

Fields

terminated: bool

c"abc", c"abc

RawStr

Fields

n_hashes: Option<u8>

“r“abc”“, “r#“abc”#“, “r####“ab”###“c”####“, “r#“a”. None indicates an invalid literal.

RawByteStr

Fields

n_hashes: Option<u8>

“br“abc”“, “br#“abc”#“, “br####“ab”###“c”####“, “br#“a”. None indicates an invalid literal.

RawCStr

Fields

n_hashes: Option<u8>

cr"abc", “cr#“abc”#“, cr#"a. None indicates an invalid literal.

Trait Implementations

impl Clone for LiteralKind

fn clone(&self) -> LiteralKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LiteralKind

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

Formats the value using the given formatter.

impl Ord for LiteralKind

fn cmp(&self, other: &LiteralKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for LiteralKind

fn eq(&self, other: &LiteralKind) -> 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 LiteralKind

fn partial_cmp(&self, other: &LiteralKind) -> 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 Copy for LiteralKind

impl Eq for LiteralKind

impl StructuralPartialEq for LiteralKind

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 3 bytes

Size for each variant:

• Int: 2 bytes
• Float: 2 bytes
• Char: 1 byte
• Byte: 1 byte
• Str: 1 byte
• ByteStr: 1 byte
• CStr: 1 byte
• RawStr: 2 bytes
• RawByteStr: 2 bytes
• RawCStr: 2 bytes