Struct syn::Block [−][src]
A braced block containing Rust statements.
This type is available only if Syn is built with the "full"
feature.
Fields
brace_token: Brace
stmts: Vec<Stmt>
Statements in a block
Implementations
impl Block
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pub fn parse_within(input: ParseStream<'_>) -> Result<Vec<Stmt>>
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Parse the body of a block as zero or more statements, possibly including one trailing expression.
This function is available only if Syn is built with the "parsing"
feature.
Example
use syn::{braced, token, Attribute, Block, Ident, Result, Stmt, Token}; use syn::parse::{Parse, ParseStream}; // Parse a function with no generics or parameter list. // // fn playground { // let mut x = 1; // x += 1; // println!("{}", x); // } struct MiniFunction { attrs: Vec<Attribute>, fn_token: Token![fn], name: Ident, brace_token: token::Brace, stmts: Vec<Stmt>, } impl Parse for MiniFunction { fn parse(input: ParseStream) -> Result<Self> { let outer_attrs = input.call(Attribute::parse_outer)?; let fn_token: Token![fn] = input.parse()?; let name: Ident = input.parse()?; let content; let brace_token = braced!(content in input); let inner_attrs = content.call(Attribute::parse_inner)?; let stmts = content.call(Block::parse_within)?; Ok(MiniFunction { attrs: { let mut attrs = outer_attrs; attrs.extend(inner_attrs); attrs }, fn_token, name, brace_token, stmts, }) } }
Trait Implementations
impl Clone for Block
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fn clone(&self) -> Self
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pub fn clone_from(&mut self, source: &Self)
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impl Debug for Block
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impl Eq for Block
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impl Hash for Block
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl Parse for Block
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fn parse(input: ParseStream<'_>) -> Result<Self>
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impl PartialEq<Block> for Block
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impl ToTokens for Block
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fn to_tokens(&self, tokens: &mut TokenStream)
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pub fn to_token_stream(&self) -> TokenStream
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pub fn into_token_stream(self) -> TokenStream
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Auto Trait Implementations
impl RefUnwindSafe for Block
impl !Send for Block
impl !Sync for Block
impl Unpin for Block
impl UnwindSafe for Block
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> Spanned for T where
T: Spanned + ?Sized,
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T: Spanned + ?Sized,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,