Enum Value

pub enum Value {
    Literal(Lit),
    Array(Vec<Lit>),
}

Represents a value for a name-value attribute.

Variants

Literal(Lit)

A literal value: #[attribute(name="value")].

Array(Vec<Lit>)

An array of literal values: #[attribute(name=1,2,3,4)].

Implementations

impl Value

pub fn is_literal(&self) -> bool

Returns true if this value is a literal.

pub fn is_array(&self) -> bool

Returns true if this value is an array.

pub fn is_string(&self) -> bool

Returns true if this value is a string or byte string literal value.

pub fn is_char(&self) -> bool

Returns true if this value is a char literal value.

pub fn is_bool(&self) -> bool

Returns true if this value is a bool literal value.

pub fn is_integer(&self) -> bool

Returns true if this value is an integer or byte literal value.

pub fn is_float(&self) -> bool

Returns true if this value is a float literal value.

pub fn is_numeric(&self) -> bool

Returns true if this value is a numeric literal (integer or float).

pub fn to_string_literal(&self) -> Option<String>

Returns the String representation of this value or None if is not a string literal.

pub fn to_char_literal(&self) -> Option<char>

Returns the char representation of this value or None if is not a char literal.

pub fn to_bool_literal(&self) -> Option<bool>

Returns the bool representation of this value or None if is not a bool literal.

pub fn to_byte_literal(&self) -> Option<u8>

Returns the byte representation of this value or None if is not a byte literal.

pub fn to_integer_literal<N>(&self) -> Option<N>

where N: FromStr, N::Err: Display,

Converts this value into a integer or None if is not an integer literal.

pub fn to_float_literal<N>(&self) -> Option<N>

where N: FromStr, N::Err: Display,

Converts this value into a float or None if is not a float literal.

pub fn as_literal(&self) -> Option<&Lit>

Returns a reference to this value literal.

pub fn as_array(&self) -> Option<&[Lit]>

Returns a reference to this value array of literals.

pub fn parse_literal<T: FromStr>(&self) -> Option<T>

Parses this value into the given type.

Returns None

• None if the value is not a literal.
• None if the parse fails.

pub fn parse_array<T: FromStr>(&self) -> Option<Vec<T>>

Parses this value into a Vec<T>

Returns None

• None if the value is not an array literal.
• None if the parse fails.

pub fn display<W: Write>( &self, formatter: &mut W, use_array_brackets: bool, ) -> Result

Writes a String representation of this value using the given Write.

Arguments

• formatter : The formatter used to write the data.
• use_array_brackets : Wraps the arrays using brackets: [1,2,3].

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 Display for Value

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

Formats the value using the given formatter.

impl Hash for Value

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Value

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

impl StructuralPartialEq for Value