Struct darling_core::util::IdentList

pub struct IdentList(_);

A list of syn::Ident instances. This type is used to extract a list of words from an attribute.

Usage

An IdentList field on a struct implementing FromMeta will turn #[builder(derive(Debug, Clone))] into:

StructOptions {
    derive: IdentList(vec![syn::Ident::new("Debug"), syn::Ident::new("Clone")])
}

Methods

impl IdentList

pub fn new<T: Into<Ident>>(vals: Vec<T>) -> Self

Create a new list.

Important traits for Vec<u8>

impl Write for Vec<u8>

pub fn as_strs<'a>(&'a self) -> Vec<&'a str>

Creates a view of the contained identifiers as &strs.

Methods from Deref<Target = Vec<Ident>>

pub fn capacity(&self) -> usize

Returns the number of elements the vector can hold without reallocating.

Examples

let vec: Vec<i32> = Vec::with_capacity(10);
assert_eq!(vec.capacity(), 10);

Important traits for &'a mut [u8]

impl<'a> Write for &'a mut [u8]impl<'a> Read for &'a [u8]

pub fn as_slice(&self) -> &[T]

Extracts a slice containing the entire vector.

Equivalent to &s[..].

Examples

use std::io::{self, Write};
let buffer = vec![1, 2, 3, 5, 8];
io::sink().write(buffer.as_slice()).unwrap();

pub fn len(&self) -> usize

Returns the number of elements in the vector, also referred to as its 'length'.

Examples

let a = vec![1, 2, 3];
assert_eq!(a.len(), 3);

pub fn is_empty(&self) -> bool

Returns true if the vector contains no elements.

Examples

let mut v = Vec::new();
assert!(v.is_empty());

v.push(1);
assert!(!v.is_empty());

Trait Implementations

impl Debug for IdentList

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for IdentList

fn default() -> IdentList

Returns the "default value" for a type.

impl Clone for IdentList

fn clone(&self) -> IdentList

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for IdentList

fn eq(&self, __arg_0: &IdentList) -> bool

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

fn ne(&self, __arg_0: &IdentList) -> bool

This method tests for !=.

impl Eq for IdentList

impl Deref for IdentList

type Target = Vec<Ident>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl From<Vec<Ident>> for IdentList

fn from(v: Vec<Ident>) -> Self

Performs the conversion.

impl FromMeta for IdentList

fn from_list(v: &[NestedMeta]) -> Result<Self>

Create an instance from a list of nested meta items.

fn from_nested_meta(item: &NestedMeta) -> Result<Self>

fn from_meta(item: &Meta) -> Result<Self>

Create an instance from a syn::Meta by dispatching to the format-appropriate trait function. This generally should not be overridden by implementers.

fn from_word() -> Result<Self>

Create an instance from the presence of the word in the attribute with no additional options specified.

fn from_value(value: &Lit) -> Result<Self>

Create an instance from a literal value of either foo = "bar" or foo("bar"). This dispatches to the appropriate method based on the type of literal encountered, and generally should not be overridden by implementers.

fn from_char(value: char) -> Result<Self>

Create an instance from a char literal in a value position.

fn from_string(value: &str) -> Result<Self>

Create an instance from a string literal in a value position.

fn from_bool(value: bool) -> Result<Self>

Create an instance from a bool literal in a value position.