Struct parsel::ast::Brace

source ·
pub struct Brace<T> { /* private fields */ }
Expand description

Parses a subexpression inside curly braces.

#[derive(PartialEq, Eq, Debug, Parse)]
struct KeyValue {
    key: LitStr,
    eq: Token![=],
    value: Lit,
}
let map: Brace<KeyValue> = parse_quote!({ "age" = 27 });
let key_value: KeyValue = parse_quote!("age" = 27);

assert_eq!(map.into_inner(), key_value);
let set: Brace<Ident> = parse_quote!(my_ident);
let block: Brace<LitBool> = LitBool::from(false).into();

assert_eq!(
    block.to_token_stream().to_string(),
    quote::quote!({ false }).to_string(),
);

Implementations§

source§

impl<T> Brace<T>

source

pub fn new(inner: T, span: Span) -> Self

source

pub fn into_inner(self) -> T

source

pub fn as_braces(&self) -> &Brace

source

pub fn into_braces(self) -> Brace

source

pub fn as_parts(&self) -> (&Brace, &T)

source

pub fn into_parts(self) -> (Brace, T)

Trait Implementations§

source§

impl<T> AsMut<T> for Brace<T>

source§

fn as_mut(&mut self) -> &mut T

Converts this type into a mutable reference of the (usually inferred) input type.
source§

impl<T> AsRef<T> for Brace<T>

source§

fn as_ref(&self) -> &T

Converts this type into a shared reference of the (usually inferred) input type.
source§

impl<T: Clone> Clone for Brace<T>

source§

fn clone(&self) -> Brace<T>

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl<T: Debug> Debug for Brace<T>

source§

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

Formats the value using the given formatter. Read more
source§

impl<T: Default> Default for Brace<T>

source§

fn default() -> Brace<T>

Returns the “default value” for a type. Read more
source§

impl<T> Deref for Brace<T>

§

type Target = T

The resulting type after dereferencing.
source§

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

Dereferences the value.
source§

impl<T> DerefMut for Brace<T>

source§

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.
source§

impl<T: ToTokens> Display for Brace<T>

source§

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

Formats the value using the given formatter. Read more
source§

impl<T> From<(Brace, T)> for Brace<T>

source§

fn from((braces, inner): (Brace, T)) -> Self

Converts to this type from the input type.
source§

impl<T: Spanned> From<T> for Brace<T>

source§

fn from(inner: T) -> Self

Converts to this type from the input type.
source§

impl<T: Parse> FromStr for Brace<T>

§

type Err = Error

The associated error which can be returned from parsing.
source§

fn from_str(string: &str) -> Result<Self>

Parses a string s to return a value of this type. Read more
source§

impl<T: Hash> Hash for Brace<T>

source§

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
source§

impl<T: Parse> Parse for Brace<T>

source§

fn parse(input: ParseStream<'_>) -> Result<Self>

source§

impl<T: PartialEq> PartialEq<Brace<T>> for Brace<T>

source§

fn eq(&self, other: &Brace<T>) -> bool

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

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.
source§

impl<T: ToTokens> ToTokens for Brace<T>

source§

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream. Read more
source§

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object. Read more
source§

fn into_token_stream(self) -> TokenStreamwhere Self: Sized,

Convert self directly into a TokenStream object. Read more
source§

impl<T: Copy> Copy for Brace<T>

source§

impl<T: Eq> Eq for Brace<T>

source§

impl<T> StructuralEq for Brace<T>

source§

impl<T> StructuralPartialEq for Brace<T>

Auto Trait Implementations§

§

impl<T> RefUnwindSafe for Brace<T>where T: RefUnwindSafe,

§

impl<T> !Send for Brace<T>

§

impl<T> !Sync for Brace<T>

§

impl<T> Unpin for Brace<T>where T: Unpin,

§

impl<T> UnwindSafe for Brace<T>where T: UnwindSafe,

Blanket Implementations§

source§

impl<T> Any for Twhere T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> Spanned for Twhere T: Spanned + ?Sized,

source§

fn span(&self) -> Span

Returns a Span covering the complete contents of this syntax tree node, or Span::call_site() if this node is empty.
source§

impl<T> SpannedExt for Twhere T: Spanned + ?Sized,

source§

fn byte_range(&self, source: &str) -> Range<usize>

TODO(H2CO3): a faster, less naive implementation would be great. We should use the byte offset of start to compute that of end, sparing the double scan of the source up until the start location.

let source = r#"
   -3.667
  1248  "string ű literal"
      "wíőzs"
"#;
let tokens: Many<Lit> = source.parse()?;

assert_eq!(tokens.len(), 4);
assert_eq!(tokens[0].byte_range(source),  4..10);
assert_eq!(tokens[1].byte_range(source), 13..17);
assert_eq!(tokens[2].byte_range(source), 19..38);
assert_eq!(tokens[3].byte_range(source), 45..54);
source§

fn char_range(&self, source: &str) -> Range<usize>

TODO(H2CO3): a faster, less naive implementation would be great. We should use the char offset of start to compute that of end, sparing the double scan of the source up until the start location.

let source = r#"
   -3.667
  1248  "string ű literal"
      "wíőzs"
"#;
let tokens: Many<Lit> = source.parse()?;

assert_eq!(tokens.len(), 4);
assert_eq!(tokens[0].char_range(source),  4..10);
assert_eq!(tokens[1].char_range(source), 13..17);
assert_eq!(tokens[2].char_range(source), 19..37);
assert_eq!(tokens[3].char_range(source), 44..51);
source§

fn format_span(&self) -> SpanDisplay

source§

impl<T> ToOwned for Twhere T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T> ToString for Twhere T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.