[][src]Struct syn::Block

pub struct Block {
    pub brace_token: Brace,
    pub stmts: Vec<Stmt>,
}

A braced block containing Rust statements.

This type is available if Syn is built with the "full" feature.

Fields

Statements in a block

Methods

impl Block
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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

#[macro_use]
extern crate syn;

use syn::{token, Attribute, Block, Ident, Result, Stmt};
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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impl Clone for Block
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Performs copy-assignment from source. Read more

impl Eq for Block
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impl PartialEq<Block> for Block
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impl Debug for Block
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impl Hash for Block
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Feeds a slice of this type into the given [Hasher]. Read more

impl ToTokens for Block
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Convert self directly into a TokenStream object. Read more

Auto Trait Implementations

impl !Send for Block

impl !Sync for Block

Blanket Implementations

impl<T> Spanned for T where
    T: ToTokens
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impl<T> From for T
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impl<T, U> Into for T where
    U: From<T>, 
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impl<T> ToOwned for T where
    T: Clone
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impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
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impl<T> Any for T where
    T: 'static + ?Sized
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impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

impl<T> BorrowMut for T where
    T: ?Sized
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impl<E> SpecializationError for E
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impl<T> Erased for T
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impl<T> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T