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Diffstat (limited to 'syn-mid/src/lib.rs')
| -rw-r--r-- | syn-mid/src/lib.rs | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/syn-mid/src/lib.rs b/syn-mid/src/lib.rs deleted file mode 100644 index 69bdec9..0000000 --- a/syn-mid/src/lib.rs +++ /dev/null @@ -1,190 +0,0 @@ -//! Providing the features between "full" and "derive" of syn. -//! -//! This crate provides the following two unique data structures. -//! -//! * [`syn_mid::ItemFn`] -- A function whose body is not parsed. -//! -//! ```text -//! fn process(n: usize) -> Result<()> { ... } -//! ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^ ^ -//! ``` -//! -//! * [`syn_mid::Block`] -- A block whose body is not parsed. -//! -//! ```text -//! { ... } -//! ^ ^ -//! ``` -//! -//! Other data structures are the same as data structures of [syn]. These are defined in this crate -//! because they cannot be used in [syn] without "full" feature. -//! -//! ## Optional features -//! -//! syn-mid in the default features aims to provide the features between "full" -//! and "derive" of [syn]. -//! -//! * **`clone-impls`** — Clone impls for all syntax tree types. -//! -//! [`syn_mid::ItemFn`]: struct.ItemFn.html -//! [`syn_mid::Block`]: struct.Block.html -//! [syn]: https://github.com/dtolnay/syn -//! - -#![doc(html_root_url = "https://docs.rs/syn-mid/0.4.0")] -#![doc(test(attr(deny(warnings), allow(dead_code, unused_assignments, unused_variables))))] -#![warn(unsafe_code)] -#![warn(rust_2018_idioms, unreachable_pub)] -#![warn(single_use_lifetimes)] -#![warn(clippy::all, clippy::pedantic)] -#![allow( - clippy::eval_order_dependence, - clippy::large_enum_variant, - clippy::module_name_repetitions, - clippy::use_self -)] - -// Many of the code contained in this crate are copies from https://github.com/dtolnay/syn. - -#[macro_use] -mod macros; - -mod arg; -mod pat; -mod path; - -pub use self::arg::*; -pub use self::pat::*; - -use proc_macro2::TokenStream; -use syn::{ - punctuated::Punctuated, token, Abi, Attribute, Generics, Ident, ReturnType, Token, Visibility, -}; - -ast_struct! { - /// A braced block containing Rust statements. - pub struct Block { - pub brace_token: token::Brace, - /// Statements in a block - pub stmts: TokenStream, - } -} - -ast_struct! { - /// A free-standing function: `fn process(n: usize) -> Result<()> { ... - /// }`. - pub struct ItemFn { - pub attrs: Vec<Attribute>, - pub vis: Visibility, - pub constness: Option<Token![const]>, - pub asyncness: Option<Token![async]>, - pub unsafety: Option<Token![unsafe]>, - pub abi: Option<Abi>, - pub fn_token: Token![fn], - pub ident: Ident, - pub generics: Generics, - pub paren_token: token::Paren, - pub inputs: Punctuated<FnArg, Token![,]>, - pub output: ReturnType, - pub block: Block, - } -} - -mod parsing { - use syn::{ - braced, parenthesized, - parse::{Parse, ParseStream, Result}, - Abi, Attribute, Generics, Ident, ReturnType, Token, Visibility, WhereClause, - }; - - use super::{Block, FnArg, ItemFn}; - - impl Parse for Block { - fn parse(input: ParseStream<'_>) -> Result<Self> { - let content; - Ok(Self { - brace_token: braced!(content in input), - stmts: content.parse()?, - }) - } - } - - impl Parse for ItemFn { - fn parse(input: ParseStream<'_>) -> Result<Self> { - let attrs = input.call(Attribute::parse_outer)?; - let vis: Visibility = input.parse()?; - let constness: Option<Token![const]> = input.parse()?; - let asyncness: Option<Token![async]> = input.parse()?; - let unsafety: Option<Token![unsafe]> = input.parse()?; - let abi: Option<Abi> = input.parse()?; - let fn_token: Token![fn] = input.parse()?; - let ident: Ident = input.parse()?; - let generics: Generics = input.parse()?; - - let content; - let paren_token = parenthesized!(content in input); - let inputs = content.parse_terminated(FnArg::parse)?; - - let output: ReturnType = input.parse()?; - let where_clause: Option<WhereClause> = input.parse()?; - - let block = input.parse()?; - - Ok(Self { - attrs, - vis, - constness, - asyncness, - unsafety, - abi, - fn_token, - ident, - generics: Generics { - where_clause, - ..generics - }, - paren_token, - inputs, - output, - block, - }) - } - } -} - -mod printing { - use proc_macro2::TokenStream; - use quote::{ToTokens, TokenStreamExt}; - - use super::{Block, ItemFn}; - - impl ToTokens for Block { - fn to_tokens(&self, tokens: &mut TokenStream) { - self.brace_token.surround(tokens, |tokens| { - tokens.append_all(self.stmts.clone()); - }); - } - } - - impl ToTokens for ItemFn { - fn to_tokens(&self, tokens: &mut TokenStream) { - tokens.append_all(&self.attrs); - self.vis.to_tokens(tokens); - self.constness.to_tokens(tokens); - self.asyncness.to_tokens(tokens); - self.unsafety.to_tokens(tokens); - self.abi.to_tokens(tokens); - self.fn_token.to_tokens(tokens); - self.ident.to_tokens(tokens); - self.generics.to_tokens(tokens); - self.paren_token.surround(tokens, |tokens| { - self.inputs.to_tokens(tokens); - }); - self.output.to_tokens(tokens); - self.generics.where_clause.to_tokens(tokens); - self.block.brace_token.surround(tokens, |tokens| { - tokens.append_all(self.block.stmts.clone()); - }); - } - } -} |