[−][src]Struct syn::Block
A braced block containing Rust statements.
This type is available if Syn is built with the "full"
feature.
Fields
brace_token: Brace
stmts: Vec<Stmt>
Statements in a block
Methods
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 if Syn is built with the "parsing"
feature.
Example
ⓘThis code runs with edition 2018
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: fn_token, name: name, brace_token: brace_token, stmts: stmts, }) } }
Trait Implementations
impl Parse for Block
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fn parse(input: ParseStream) -> Result<Self>
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impl Eq for Block
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impl PartialEq<Block> for Block
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impl Clone for Block
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fn clone(&self) -> Block
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default fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Debug for Block
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impl Hash for Block
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fn hash<__H: Hasher>(&self, state: &mut __H)
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default fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl ToTokens for Block
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fn to_tokens(&self, tokens: &mut TokenStream)
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default fn into_token_stream(self) -> TokenStream
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Convert self
directly into a TokenStream
object. Read more
Auto Trait Implementations
Blanket Implementations
impl<T> Spanned for T where
T: ToTokens,
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T: ToTokens,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom 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.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,