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Diffstat (limited to 'third_party/rust/syn/src/pat.rs')
| -rw-r--r-- | third_party/rust/syn/src/pat.rs | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/third_party/rust/syn/src/pat.rs b/third_party/rust/syn/src/pat.rs new file mode 100644 index 0000000000..b279186aa0 --- /dev/null +++ b/third_party/rust/syn/src/pat.rs @@ -0,0 +1,927 @@ +use super::*; +use crate::punctuated::Punctuated; +use proc_macro2::TokenStream; + +ast_enum_of_structs! { + /// A pattern in a local binding, function signature, match expression, or + /// various other places. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + /// + /// # Syntax tree enum + /// + /// This type is a [syntax tree enum]. + /// + /// [syntax tree enum]: Expr#syntax-tree-enums + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)] + pub enum Pat { + /// A box pattern: `box v`. + Box(PatBox), + + /// A pattern that binds a new variable: `ref mut binding @ SUBPATTERN`. + Ident(PatIdent), + + /// A literal pattern: `0`. + /// + /// This holds an `Expr` rather than a `Lit` because negative numbers + /// are represented as an `Expr::Unary`. + Lit(PatLit), + + /// A macro in pattern position. + Macro(PatMacro), + + /// A pattern that matches any one of a set of cases. + Or(PatOr), + + /// A path pattern like `Color::Red`, optionally qualified with a + /// self-type. + /// + /// Unqualified path patterns can legally refer to variants, structs, + /// constants or associated constants. Qualified path patterns like + /// `<A>::B::C` and `<A as Trait>::B::C` can only legally refer to + /// associated constants. + Path(PatPath), + + /// A range pattern: `1..=2`. + Range(PatRange), + + /// A reference pattern: `&mut var`. + Reference(PatReference), + + /// The dots in a tuple or slice pattern: `[0, 1, ..]` + Rest(PatRest), + + /// A dynamically sized slice pattern: `[a, b, ref i @ .., y, z]`. + Slice(PatSlice), + + /// A struct or struct variant pattern: `Variant { x, y, .. }`. + Struct(PatStruct), + + /// A tuple pattern: `(a, b)`. + Tuple(PatTuple), + + /// A tuple struct or tuple variant pattern: `Variant(x, y, .., z)`. + TupleStruct(PatTupleStruct), + + /// A type ascription pattern: `foo: f64`. + Type(PatType), + + /// Tokens in pattern position not interpreted by Syn. + Verbatim(TokenStream), + + /// A pattern that matches any value: `_`. + Wild(PatWild), + + // Not public API. + // + // For testing exhaustiveness in downstream code, use the following idiom: + // + // match pat { + // Pat::Box(pat) => {...} + // Pat::Ident(pat) => {...} + // ... + // Pat::Wild(pat) => {...} + // + // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))] + // _ => { /* some sane fallback */ } + // } + // + // This way we fail your tests but don't break your library when adding + // a variant. You will be notified by a test failure when a variant is + // added, so that you can add code to handle it, but your library will + // continue to compile and work for downstream users in the interim. + #[cfg(syn_no_non_exhaustive)] + #[doc(hidden)] + __NonExhaustive, + } +} + +ast_struct! { + /// A box pattern: `box v`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatBox { + pub attrs: Vec<Attribute>, + pub box_token: Token![box], + pub pat: Box<Pat>, + } +} + +ast_struct! { + /// A pattern that binds a new variable: `ref mut binding @ SUBPATTERN`. + /// + /// It may also be a unit struct or struct variant (e.g. `None`), or a + /// constant; these cannot be distinguished syntactically. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatIdent { + pub attrs: Vec<Attribute>, + pub by_ref: Option<Token![ref]>, + pub mutability: Option<Token![mut]>, + pub ident: Ident, + pub subpat: Option<(Token![@], Box<Pat>)>, + } +} + +ast_struct! { + /// A literal pattern: `0`. + /// + /// This holds an `Expr` rather than a `Lit` because negative numbers + /// are represented as an `Expr::Unary`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatLit { + pub attrs: Vec<Attribute>, + pub expr: Box<Expr>, + } +} + +ast_struct! { + /// A macro in pattern position. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatMacro { + pub attrs: Vec<Attribute>, + pub mac: Macro, + } +} + +ast_struct! { + /// A pattern that matches any one of a set of cases. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatOr { + pub attrs: Vec<Attribute>, + pub leading_vert: Option<Token![|]>, + pub cases: Punctuated<Pat, Token![|]>, + } +} + +ast_struct! { + /// A path pattern like `Color::Red`, optionally qualified with a + /// self-type. + /// + /// Unqualified path patterns can legally refer to variants, structs, + /// constants or associated constants. Qualified path patterns like + /// `<A>::B::C` and `<A as Trait>::B::C` can only legally refer to + /// associated constants. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatPath { + pub attrs: Vec<Attribute>, + pub qself: Option<QSelf>, + pub path: Path, + } +} + +ast_struct! { + /// A range pattern: `1..=2`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatRange { + pub attrs: Vec<Attribute>, + pub lo: Box<Expr>, + pub limits: RangeLimits, + pub hi: Box<Expr>, + } +} + +ast_struct! { + /// A reference pattern: `&mut var`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatReference { + pub attrs: Vec<Attribute>, + pub and_token: Token![&], + pub mutability: Option<Token![mut]>, + pub pat: Box<Pat>, + } +} + +ast_struct! { + /// The dots in a tuple or slice pattern: `[0, 1, ..]` + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatRest { + pub attrs: Vec<Attribute>, + pub dot2_token: Token![..], + } +} + +ast_struct! { + /// A dynamically sized slice pattern: `[a, b, ref i @ .., y, z]`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatSlice { + pub attrs: Vec<Attribute>, + pub bracket_token: token::Bracket, + pub elems: Punctuated<Pat, Token![,]>, + } +} + +ast_struct! { + /// A struct or struct variant pattern: `Variant { x, y, .. }`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatStruct { + pub attrs: Vec<Attribute>, + pub path: Path, + pub brace_token: token::Brace, + pub fields: Punctuated<FieldPat, Token![,]>, + pub dot2_token: Option<Token![..]>, + } +} + +ast_struct! { + /// A tuple pattern: `(a, b)`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatTuple { + pub attrs: Vec<Attribute>, + pub paren_token: token::Paren, + pub elems: Punctuated<Pat, Token![,]>, + } +} + +ast_struct! { + /// A tuple struct or tuple variant pattern: `Variant(x, y, .., z)`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatTupleStruct { + pub attrs: Vec<Attribute>, + pub path: Path, + pub pat: PatTuple, + } +} + +ast_struct! { + /// A type ascription pattern: `foo: f64`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatType { + pub attrs: Vec<Attribute>, + pub pat: Box<Pat>, + pub colon_token: Token![:], + pub ty: Box<Type>, + } +} + +ast_struct! { + /// A pattern that matches any value: `_`. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct PatWild { + pub attrs: Vec<Attribute>, + pub underscore_token: Token![_], + } +} + +ast_struct! { + /// A single field in a struct pattern. + /// + /// Patterns like the fields of Foo `{ x, ref y, ref mut z }` are treated + /// the same as `x: x, y: ref y, z: ref mut z` but there is no colon token. + /// + /// *This type is available only if Syn is built with the `"full"` feature.* + #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))] + pub struct FieldPat { + pub attrs: Vec<Attribute>, + pub member: Member, + pub colon_token: Option<Token![:]>, + pub pat: Box<Pat>, + } +} + +#[cfg(feature = "parsing")] +pub mod parsing { + use super::*; + use crate::ext::IdentExt; + use crate::parse::{Parse, ParseBuffer, ParseStream, Result}; + use crate::path; + + #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))] + impl Parse for Pat { + fn parse(input: ParseStream) -> Result<Self> { + let begin = input.fork(); + let lookahead = input.lookahead1(); + if { + let ahead = input.fork(); + ahead.parse::<Option<Ident>>()?.is_some() + && (ahead.peek(Token![::]) + || ahead.peek(Token![!]) + || ahead.peek(token::Brace) + || ahead.peek(token::Paren) + || ahead.peek(Token![..]) + && ahead.parse::<RangeLimits>().is_ok() + && !(ahead.is_empty() || ahead.peek(Token![,]))) + } || { + let ahead = input.fork(); + ahead.parse::<Option<Token![self]>>()?.is_some() && ahead.peek(Token![::]) + } || lookahead.peek(Token![::]) + || lookahead.peek(Token![<]) + || input.peek(Token![Self]) + || input.peek(Token![super]) + || input.peek(Token![crate]) + { + pat_path_or_macro_or_struct_or_range(input) + } else if lookahead.peek(Token![_]) { + input.call(pat_wild).map(Pat::Wild) + } else if input.peek(Token![box]) { + input.call(pat_box).map(Pat::Box) + } else if input.peek(Token![-]) || lookahead.peek(Lit) || lookahead.peek(Token![const]) + { + pat_lit_or_range(input) + } else if lookahead.peek(Token![ref]) + || lookahead.peek(Token![mut]) + || input.peek(Token![self]) + || input.peek(Ident) + { + input.call(pat_ident).map(Pat::Ident) + } else if lookahead.peek(Token![&]) { + input.call(pat_reference).map(Pat::Reference) + } else if lookahead.peek(token::Paren) { + input.call(pat_tuple).map(Pat::Tuple) + } else if lookahead.peek(token::Bracket) { + input.call(pat_slice).map(Pat::Slice) + } else if lookahead.peek(Token![..]) && !input.peek(Token![...]) { + pat_range_half_open(input, begin) + } else if lookahead.peek(Token![const]) { + input.call(pat_const).map(Pat::Verbatim) + } else { + Err(lookahead.error()) + } + } + } + + fn pat_path_or_macro_or_struct_or_range(input: ParseStream) -> Result<Pat> { + let begin = input.fork(); + let (qself, path) = path::parsing::qpath(input, true)?; + + if qself.is_none() && input.peek(Token![!]) && !input.peek(Token![!=]) { + let mut contains_arguments = false; + for segment in &path.segments { + match segment.arguments { + PathArguments::None => {} + PathArguments::AngleBracketed(_) | PathArguments::Parenthesized(_) => { + contains_arguments = true; + } + } + } + + if !contains_arguments { + let bang_token: Token![!] = input.parse()?; + let (delimiter, tokens) = mac::parse_delimiter(input)?; + return Ok(Pat::Macro(PatMacro { + attrs: Vec::new(), + mac: Macro { + path, + bang_token, + delimiter, + tokens, + }, + })); + } + } + + if input.peek(token::Brace) { + let pat = pat_struct(begin.fork(), input, path)?; + if qself.is_some() { + Ok(Pat::Verbatim(verbatim::between(begin, input))) + } else { + Ok(pat) + } + } else if input.peek(token::Paren) { + let pat = pat_tuple_struct(input, path)?; + if qself.is_some() { + Ok(Pat::Verbatim(verbatim::between(begin, input))) + } else { + Ok(Pat::TupleStruct(pat)) + } + } else if input.peek(Token![..]) { + pat_range(input, begin, qself, path) + } else { + Ok(Pat::Path(PatPath { + attrs: Vec::new(), + qself, + path, + })) + } + } + + fn pat_wild(input: ParseStream) -> Result<PatWild> { + Ok(PatWild { + attrs: Vec::new(), + underscore_token: input.parse()?, + }) + } + + fn pat_box(input: ParseStream) -> Result<PatBox> { + Ok(PatBox { + attrs: Vec::new(), + box_token: input.parse()?, + pat: input.parse()?, + }) + } + + fn pat_ident(input: ParseStream) -> Result<PatIdent> { + Ok(PatIdent { + attrs: Vec::new(), + by_ref: input.parse()?, + mutability: input.parse()?, + ident: input.call(Ident::parse_any)?, + subpat: { + if input.peek(Token![@]) { + let at_token: Token![@] = input.parse()?; + let subpat: Pat = input.parse()?; + Some((at_token, Box::new(subpat))) + } else { + None + } + }, + }) + } + + fn pat_tuple_struct(input: ParseStream, path: Path) -> Result<PatTupleStruct> { + Ok(PatTupleStruct { + attrs: Vec::new(), + path, + pat: input.call(pat_tuple)?, + }) + } + + fn pat_struct(begin: ParseBuffer, input: ParseStream, path: Path) -> Result<Pat> { + let content; + let brace_token = braced!(content in input); + + let mut fields = Punctuated::new(); + let mut dot2_token = None; + while !content.is_empty() { + let attrs = content.call(Attribute::parse_outer)?; + if content.peek(Token![..]) { + dot2_token = Some(content.parse()?); + if !attrs.is_empty() { + return Ok(Pat::Verbatim(verbatim::between(begin, input))); + } + break; + } + let mut value = content.call(field_pat)?; + value.attrs = attrs; + fields.push_value(value); + if content.is_empty() { + break; + } + let punct: Token![,] = content.parse()?; + fields.push_punct(punct); + } + + Ok(Pat::Struct(PatStruct { + attrs: Vec::new(), + path, + brace_token, + fields, + dot2_token, + })) + } + + impl Member { + fn is_unnamed(&self) -> bool { + match *self { + Member::Named(_) => false, + Member::Unnamed(_) => true, + } + } + } + + fn field_pat(input: ParseStream) -> Result<FieldPat> { + let boxed: Option<Token![box]> = input.parse()?; + let by_ref: Option<Token![ref]> = input.parse()?; + let mutability: Option<Token![mut]> = input.parse()?; + let member: Member = input.parse()?; + + if boxed.is_none() && by_ref.is_none() && mutability.is_none() && input.peek(Token![:]) + || member.is_unnamed() + { + return Ok(FieldPat { + attrs: Vec::new(), + member, + colon_token: input.parse()?, + pat: Box::new(multi_pat_with_leading_vert(input)?), + }); + } + + let ident = match member { + Member::Named(ident) => ident, + Member::Unnamed(_) => unreachable!(), + }; + + let mut pat = Pat::Ident(PatIdent { + attrs: Vec::new(), + by_ref, + mutability, + ident: ident.clone(), + subpat: None, + }); + + if let Some(boxed) = boxed { + pat = Pat::Box(PatBox { + attrs: Vec::new(), + box_token: boxed, + pat: Box::new(pat), + }); + } + + Ok(FieldPat { + attrs: Vec::new(), + member: Member::Named(ident), + colon_token: None, + pat: Box::new(pat), + }) + } + + fn pat_range( + input: ParseStream, + begin: ParseBuffer, + qself: Option<QSelf>, + path: Path, + ) -> Result<Pat> { + let limits: RangeLimits = input.parse()?; + let hi = input.call(pat_lit_expr)?; + if let Some(hi) = hi { + Ok(Pat::Range(PatRange { + attrs: Vec::new(), + lo: Box::new(Expr::Path(ExprPath { + attrs: Vec::new(), + qself, + path, + })), + limits, + hi, + })) + } else { + Ok(Pat::Verbatim(verbatim::between(begin, input))) + } + } + + fn pat_range_half_open(input: ParseStream, begin: ParseBuffer) -> Result<Pat> { + let limits: RangeLimits = input.parse()?; + let hi = input.call(pat_lit_expr)?; + if hi.is_some() { + Ok(Pat::Verbatim(verbatim::between(begin, input))) + } else { + match limits { + RangeLimits::HalfOpen(dot2_token) => Ok(Pat::Rest(PatRest { + attrs: Vec::new(), + dot2_token, + })), + RangeLimits::Closed(_) => Err(input.error("expected range upper bound")), + } + } + } + + fn pat_tuple(input: ParseStream) -> Result<PatTuple> { + let content; + let paren_token = parenthesized!(content in input); + + let mut elems = Punctuated::new(); + while !content.is_empty() { + let value = multi_pat_with_leading_vert(&content)?; + elems.push_value(value); + if content.is_empty() { + break; + } + let punct = content.parse()?; + elems.push_punct(punct); + } + + Ok(PatTuple { + attrs: Vec::new(), + paren_token, + elems, + }) + } + + fn pat_reference(input: ParseStream) -> Result<PatReference> { + Ok(PatReference { + attrs: Vec::new(), + and_token: input.parse()?, + mutability: input.parse()?, + pat: input.parse()?, + }) + } + + fn pat_lit_or_range(input: ParseStream) -> Result<Pat> { + let begin = input.fork(); + let lo = input.call(pat_lit_expr)?.unwrap(); + if input.peek(Token![..]) { + let limits: RangeLimits = input.parse()?; + let hi = input.call(pat_lit_expr)?; + if let Some(hi) = hi { + Ok(Pat::Range(PatRange { + attrs: Vec::new(), + lo, + limits, + hi, + })) + } else { + Ok(Pat::Verbatim(verbatim::between(begin, input))) + } + } else if let Expr::Verbatim(verbatim) = *lo { + Ok(Pat::Verbatim(verbatim)) + } else { + Ok(Pat::Lit(PatLit { + attrs: Vec::new(), + expr: lo, + })) + } + } + + fn pat_lit_expr(input: ParseStream) -> Result<Option<Box<Expr>>> { + if input.is_empty() + || input.peek(Token![|]) + || input.peek(Token![=]) + || input.peek(Token![:]) && !input.peek(Token![::]) + || input.peek(Token![,]) + || input.peek(Token![;]) + { + return Ok(None); + } + + let neg: Option<Token![-]> = input.parse()?; + + let lookahead = input.lookahead1(); + let expr = if lookahead.peek(Lit) { + Expr::Lit(input.parse()?) + } else if lookahead.peek(Ident) + || lookahead.peek(Token![::]) + || lookahead.peek(Token![<]) + || lookahead.peek(Token![self]) + || lookahead.peek(Token![Self]) + || lookahead.peek(Token![super]) + || lookahead.peek(Token![crate]) + { + Expr::Path(input.parse()?) + } else if lookahead.peek(Token![const]) { + Expr::Verbatim(input.call(expr::parsing::expr_const)?) + } else { + return Err(lookahead.error()); + }; + + Ok(Some(Box::new(if let Some(neg) = neg { + Expr::Unary(ExprUnary { + attrs: Vec::new(), + op: UnOp::Neg(neg), + expr: Box::new(expr), + }) + } else { + expr + }))) + } + + fn pat_slice(input: ParseStream) -> Result<PatSlice> { + let content; + let bracket_token = bracketed!(content in input); + + let mut elems = Punctuated::new(); + while !content.is_empty() { + let value = multi_pat_with_leading_vert(&content)?; + elems.push_value(value); + if content.is_empty() { + break; + } + let punct = content.parse()?; + elems.push_punct(punct); + } + + Ok(PatSlice { + attrs: Vec::new(), + bracket_token, + elems, + }) + } + + fn pat_const(input: ParseStream) -> Result<TokenStream> { + let begin = input.fork(); + input.parse::<Token![const]>()?; + + let content; + braced!(content in input); + content.call(Attribute::parse_inner)?; + content.call(Block::parse_within)?; + + Ok(verbatim::between(begin, input)) + } + + pub fn multi_pat(input: ParseStream) -> Result<Pat> { + multi_pat_impl(input, None) + } + + pub fn multi_pat_with_leading_vert(input: ParseStream) -> Result<Pat> { + let leading_vert: Option<Token![|]> = input.parse()?; + multi_pat_impl(input, leading_vert) + } + + fn multi_pat_impl(input: ParseStream, leading_vert: Option<Token![|]>) -> Result<Pat> { + let mut pat: Pat = input.parse()?; + if leading_vert.is_some() + || input.peek(Token![|]) && !input.peek(Token![||]) && !input.peek(Token![|=]) + { + let mut cases = Punctuated::new(); + cases.push_value(pat); + while input.peek(Token![|]) && !input.peek(Token![||]) && !input.peek(Token![|=]) { + let punct = input.parse()?; + cases.push_punct(punct); + let pat: Pat = input.parse()?; + cases.push_value(pat); + } + pat = Pat::Or(PatOr { + attrs: Vec::new(), + leading_vert, + cases, + }); + } + Ok(pat) + } +} + +#[cfg(feature = "printing")] +mod printing { + use super::*; + use crate::attr::FilterAttrs; + use proc_macro2::TokenStream; + use quote::{ToTokens, TokenStreamExt}; + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatWild { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.underscore_token.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatIdent { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.by_ref.to_tokens(tokens); + self.mutability.to_tokens(tokens); + self.ident.to_tokens(tokens); + if let Some((at_token, subpat)) = &self.subpat { + at_token.to_tokens(tokens); + subpat.to_tokens(tokens); + } + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatStruct { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.path.to_tokens(tokens); + self.brace_token.surround(tokens, |tokens| { + self.fields.to_tokens(tokens); + // NOTE: We need a comma before the dot2 token if it is present. + if !self.fields.empty_or_trailing() && self.dot2_token.is_some() { + <Token![,]>::default().to_tokens(tokens); + } + self.dot2_token.to_tokens(tokens); + }); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatTupleStruct { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.path.to_tokens(tokens); + self.pat.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatType { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.pat.to_tokens(tokens); + self.colon_token.to_tokens(tokens); + self.ty.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatPath { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + path::printing::print_path(tokens, &self.qself, &self.path); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatTuple { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.paren_token.surround(tokens, |tokens| { + self.elems.to_tokens(tokens); + }); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatBox { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.box_token.to_tokens(tokens); + self.pat.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatReference { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.and_token.to_tokens(tokens); + self.mutability.to_tokens(tokens); + self.pat.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatRest { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.dot2_token.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatLit { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.expr.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatRange { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.lo.to_tokens(tokens); + self.limits.to_tokens(tokens); + self.hi.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatSlice { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.bracket_token.surround(tokens, |tokens| { + self.elems.to_tokens(tokens); + }); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatMacro { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.mac.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for PatOr { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + self.leading_vert.to_tokens(tokens); + self.cases.to_tokens(tokens); + } + } + + #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))] + impl ToTokens for FieldPat { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append_all(self.attrs.outer()); + if let Some(colon_token) = &self.colon_token { + self.member.to_tokens(tokens); + colon_token.to_tokens(tokens); + } + self.pat.to_tokens(tokens); + } + } +} |