841 lines
29 KiB
Rust
841 lines
29 KiB
Rust
use ast::StaticItem;
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use itertools::{Itertools, Position};
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use rustc_ast as ast;
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use rustc_ast::ModKind;
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use rustc_ast::ptr::P;
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use rustc_span::Ident;
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use crate::pp::Breaks::Inconsistent;
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use crate::pprust::state::fixup::FixupContext;
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use crate::pprust::state::{AnnNode, INDENT_UNIT, PrintState, State};
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enum DelegationKind<'a> {
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Single,
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List(&'a [(Ident, Option<Ident>)]),
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Glob,
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}
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fn visibility_qualified(vis: &ast::Visibility, s: &str) -> String {
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format!("{}{}", State::to_string(|s| s.print_visibility(vis)), s)
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}
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impl<'a> State<'a> {
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fn print_foreign_mod(&mut self, nmod: &ast::ForeignMod, attrs: &[ast::Attribute]) {
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self.print_inner_attributes(attrs);
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for item in &nmod.items {
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self.print_foreign_item(item);
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}
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}
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fn print_foreign_item(&mut self, item: &ast::ForeignItem) {
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let ast::Item { id, span, ident, ref attrs, ref kind, ref vis, tokens: _ } = *item;
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self.ann.pre(self, AnnNode::SubItem(id));
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self.hardbreak_if_not_bol();
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self.maybe_print_comment(span.lo());
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self.print_outer_attributes(attrs);
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match kind {
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ast::ForeignItemKind::Fn(func) => {
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self.print_fn_full(ident, vis, attrs, &*func);
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}
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ast::ForeignItemKind::Static(box ast::StaticItem { ty, mutability, expr, safety }) => {
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self.print_item_const(
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ident,
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Some(*mutability),
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&ast::Generics::default(),
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ty,
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expr.as_deref(),
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vis,
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*safety,
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ast::Defaultness::Final,
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)
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}
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ast::ForeignItemKind::TyAlias(box ast::TyAlias {
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defaultness,
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generics,
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where_clauses,
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bounds,
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ty,
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}) => {
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self.print_associated_type(
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ident,
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generics,
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*where_clauses,
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bounds,
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ty.as_deref(),
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vis,
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*defaultness,
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);
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}
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ast::ForeignItemKind::MacCall(m) => {
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self.print_mac(m);
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if m.args.need_semicolon() {
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self.word(";");
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}
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}
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}
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self.ann.post(self, AnnNode::SubItem(id))
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}
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fn print_item_const(
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&mut self,
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ident: Ident,
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mutbl: Option<ast::Mutability>,
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generics: &ast::Generics,
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ty: &ast::Ty,
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body: Option<&ast::Expr>,
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vis: &ast::Visibility,
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safety: ast::Safety,
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defaultness: ast::Defaultness,
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) {
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self.head("");
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self.print_visibility(vis);
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self.print_safety(safety);
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self.print_defaultness(defaultness);
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let leading = match mutbl {
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None => "const",
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Some(ast::Mutability::Not) => "static",
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Some(ast::Mutability::Mut) => "static mut",
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};
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self.word_space(leading);
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self.print_ident(ident);
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self.print_generic_params(&generics.params);
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self.word_space(":");
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self.print_type(ty);
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if body.is_some() {
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self.space();
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}
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self.end(); // end the head-ibox
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if let Some(body) = body {
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self.word_space("=");
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self.print_expr(body, FixupContext::default());
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}
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self.print_where_clause(&generics.where_clause);
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self.word(";");
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self.end(); // end the outer cbox
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}
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fn print_associated_type(
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&mut self,
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ident: Ident,
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generics: &ast::Generics,
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where_clauses: ast::TyAliasWhereClauses,
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bounds: &ast::GenericBounds,
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ty: Option<&ast::Ty>,
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vis: &ast::Visibility,
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defaultness: ast::Defaultness,
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) {
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let (before_predicates, after_predicates) =
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generics.where_clause.predicates.split_at(where_clauses.split);
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self.head("");
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self.print_visibility(vis);
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self.print_defaultness(defaultness);
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self.word_space("type");
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self.print_ident(ident);
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self.print_generic_params(&generics.params);
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if !bounds.is_empty() {
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self.word_nbsp(":");
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self.print_type_bounds(bounds);
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}
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self.print_where_clause_parts(where_clauses.before.has_where_token, before_predicates);
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if let Some(ty) = ty {
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self.space();
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self.word_space("=");
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self.print_type(ty);
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}
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self.print_where_clause_parts(where_clauses.after.has_where_token, after_predicates);
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self.word(";");
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self.end(); // end inner head-block
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self.end(); // end outer head-block
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}
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/// Pretty-prints an item.
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pub(crate) fn print_item(&mut self, item: &ast::Item) {
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self.hardbreak_if_not_bol();
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self.maybe_print_comment(item.span.lo());
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self.print_outer_attributes(&item.attrs);
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self.ann.pre(self, AnnNode::Item(item));
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match &item.kind {
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ast::ItemKind::ExternCrate(orig_name) => {
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self.head(visibility_qualified(&item.vis, "extern crate"));
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if let &Some(orig_name) = orig_name {
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self.print_name(orig_name);
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self.space();
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self.word("as");
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self.space();
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}
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self.print_ident(item.ident);
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self.word(";");
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self.end(); // end inner head-block
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self.end(); // end outer head-block
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}
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ast::ItemKind::Use(tree) => {
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self.print_visibility(&item.vis);
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self.word_nbsp("use");
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self.print_use_tree(tree);
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self.word(";");
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}
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ast::ItemKind::Static(box StaticItem { ty, safety, mutability: mutbl, expr: body }) => {
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self.print_safety(*safety);
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self.print_item_const(
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item.ident,
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Some(*mutbl),
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&ast::Generics::default(),
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ty,
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body.as_deref(),
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&item.vis,
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ast::Safety::Default,
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ast::Defaultness::Final,
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);
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}
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ast::ItemKind::Const(box ast::ConstItem { defaultness, generics, ty, expr }) => {
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self.print_item_const(
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item.ident,
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None,
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generics,
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ty,
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expr.as_deref(),
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&item.vis,
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ast::Safety::Default,
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*defaultness,
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);
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}
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ast::ItemKind::Fn(func) => {
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self.print_fn_full(item.ident, &item.vis, &item.attrs, &*func);
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}
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ast::ItemKind::Mod(safety, mod_kind) => {
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self.head(Self::to_string(|s| {
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s.print_visibility(&item.vis);
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s.print_safety(*safety);
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s.word("mod");
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}));
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self.print_ident(item.ident);
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match mod_kind {
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ModKind::Loaded(items, ..) => {
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self.nbsp();
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self.bopen();
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self.print_inner_attributes(&item.attrs);
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for item in items {
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self.print_item(item);
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}
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let empty = item.attrs.is_empty() && items.is_empty();
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self.bclose(item.span, empty);
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}
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ModKind::Unloaded => {
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self.word(";");
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self.end(); // end inner head-block
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self.end(); // end outer head-block
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}
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}
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}
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ast::ItemKind::ForeignMod(nmod) => {
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self.head(Self::to_string(|s| {
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s.print_safety(nmod.safety);
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s.word("extern");
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}));
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if let Some(abi) = nmod.abi {
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self.print_token_literal(abi.as_token_lit(), abi.span);
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self.nbsp();
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}
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self.bopen();
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self.print_foreign_mod(nmod, &item.attrs);
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let empty = item.attrs.is_empty() && nmod.items.is_empty();
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self.bclose(item.span, empty);
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}
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ast::ItemKind::GlobalAsm(asm) => {
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// FIXME: Print `builtin # global_asm` once macro `global_asm` uses `builtin_syntax`.
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self.head(visibility_qualified(&item.vis, "global_asm!"));
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self.print_inline_asm(asm);
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self.word(";");
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self.end();
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self.end();
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}
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ast::ItemKind::TyAlias(box ast::TyAlias {
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defaultness,
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generics,
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where_clauses,
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bounds,
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ty,
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}) => {
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self.print_associated_type(
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item.ident,
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generics,
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*where_clauses,
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bounds,
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ty.as_deref(),
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&item.vis,
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*defaultness,
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);
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}
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ast::ItemKind::Enum(enum_definition, params) => {
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self.print_enum_def(enum_definition, params, item.ident, item.span, &item.vis);
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}
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ast::ItemKind::Struct(struct_def, generics) => {
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self.head(visibility_qualified(&item.vis, "struct"));
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self.print_struct(struct_def, generics, item.ident, item.span, true);
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}
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ast::ItemKind::Union(struct_def, generics) => {
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self.head(visibility_qualified(&item.vis, "union"));
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self.print_struct(struct_def, generics, item.ident, item.span, true);
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}
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ast::ItemKind::Impl(box ast::Impl {
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safety,
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polarity,
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defaultness,
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constness,
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generics,
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of_trait,
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self_ty,
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items,
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}) => {
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self.head("");
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self.print_visibility(&item.vis);
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self.print_defaultness(*defaultness);
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self.print_safety(*safety);
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self.word("impl");
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if generics.params.is_empty() {
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self.nbsp();
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} else {
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self.print_generic_params(&generics.params);
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self.space();
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}
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self.print_constness(*constness);
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if let ast::ImplPolarity::Negative(_) = polarity {
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self.word("!");
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}
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if let Some(t) = of_trait {
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self.print_trait_ref(t);
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self.space();
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self.word_space("for");
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}
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self.print_type(self_ty);
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self.print_where_clause(&generics.where_clause);
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self.space();
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self.bopen();
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self.print_inner_attributes(&item.attrs);
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for impl_item in items {
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self.print_assoc_item(impl_item);
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}
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let empty = item.attrs.is_empty() && items.is_empty();
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self.bclose(item.span, empty);
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}
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ast::ItemKind::Trait(box ast::Trait {
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is_auto,
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safety,
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generics,
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bounds,
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items,
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..
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}) => {
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self.head("");
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self.print_visibility(&item.vis);
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self.print_safety(*safety);
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self.print_is_auto(*is_auto);
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self.word_nbsp("trait");
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self.print_ident(item.ident);
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self.print_generic_params(&generics.params);
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if !bounds.is_empty() {
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self.word_nbsp(":");
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self.print_type_bounds(bounds);
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}
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self.print_where_clause(&generics.where_clause);
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self.word(" ");
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self.bopen();
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self.print_inner_attributes(&item.attrs);
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for trait_item in items {
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self.print_assoc_item(trait_item);
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}
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let empty = item.attrs.is_empty() && items.is_empty();
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self.bclose(item.span, empty);
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}
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ast::ItemKind::TraitAlias(generics, bounds) => {
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self.head(visibility_qualified(&item.vis, "trait"));
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self.print_ident(item.ident);
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self.print_generic_params(&generics.params);
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self.nbsp();
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if !bounds.is_empty() {
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self.word_nbsp("=");
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self.print_type_bounds(bounds);
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}
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self.print_where_clause(&generics.where_clause);
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self.word(";");
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self.end(); // end inner head-block
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self.end(); // end outer head-block
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}
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ast::ItemKind::MacCall(mac) => {
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self.print_mac(mac);
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if mac.args.need_semicolon() {
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self.word(";");
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}
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}
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ast::ItemKind::MacroDef(macro_def) => {
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self.print_mac_def(macro_def, &item.ident, item.span, |state| {
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state.print_visibility(&item.vis)
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});
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}
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ast::ItemKind::Delegation(deleg) => self.print_delegation(
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&item.attrs,
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&item.vis,
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&deleg.qself,
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&deleg.path,
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DelegationKind::Single,
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&deleg.body,
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),
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ast::ItemKind::DelegationMac(deleg) => self.print_delegation(
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&item.attrs,
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&item.vis,
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&deleg.qself,
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&deleg.prefix,
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deleg.suffixes.as_ref().map_or(DelegationKind::Glob, |s| DelegationKind::List(s)),
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&deleg.body,
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),
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}
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self.ann.post(self, AnnNode::Item(item))
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}
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fn print_enum_def(
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&mut self,
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enum_definition: &ast::EnumDef,
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generics: &ast::Generics,
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ident: Ident,
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span: rustc_span::Span,
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visibility: &ast::Visibility,
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) {
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self.head(visibility_qualified(visibility, "enum"));
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self.print_ident(ident);
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self.print_generic_params(&generics.params);
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self.print_where_clause(&generics.where_clause);
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self.space();
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self.print_variants(&enum_definition.variants, span)
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}
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fn print_variants(&mut self, variants: &[ast::Variant], span: rustc_span::Span) {
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self.bopen();
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for v in variants {
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self.space_if_not_bol();
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self.maybe_print_comment(v.span.lo());
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self.print_outer_attributes(&v.attrs);
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self.ibox(0);
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self.print_variant(v);
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self.word(",");
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self.end();
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self.maybe_print_trailing_comment(v.span, None);
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}
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let empty = variants.is_empty();
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self.bclose(span, empty)
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}
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pub(crate) fn print_visibility(&mut self, vis: &ast::Visibility) {
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match &vis.kind {
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ast::VisibilityKind::Public => self.word_nbsp("pub"),
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ast::VisibilityKind::Restricted { path, shorthand, .. } => {
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let path = Self::to_string(|s| s.print_path(path, false, 0));
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if *shorthand && (path == "crate" || path == "self" || path == "super") {
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self.word_nbsp(format!("pub({path})"))
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} else {
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self.word_nbsp(format!("pub(in {path})"))
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}
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}
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ast::VisibilityKind::Inherited => {}
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}
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}
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fn print_defaultness(&mut self, defaultness: ast::Defaultness) {
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if let ast::Defaultness::Default(_) = defaultness {
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self.word_nbsp("default");
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}
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}
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pub(crate) fn print_record_struct_body(
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&mut self,
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fields: &[ast::FieldDef],
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span: rustc_span::Span,
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) {
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self.nbsp();
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self.bopen();
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let empty = fields.is_empty();
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if !empty {
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self.hardbreak_if_not_bol();
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for field in fields {
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self.hardbreak_if_not_bol();
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self.maybe_print_comment(field.span.lo());
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self.print_outer_attributes(&field.attrs);
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self.print_visibility(&field.vis);
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self.print_ident(field.ident.unwrap());
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self.word_nbsp(":");
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self.print_type(&field.ty);
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self.word(",");
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}
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}
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self.bclose(span, empty);
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}
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fn print_struct(
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&mut self,
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struct_def: &ast::VariantData,
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generics: &ast::Generics,
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ident: Ident,
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span: rustc_span::Span,
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print_finalizer: bool,
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) {
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self.print_ident(ident);
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self.print_generic_params(&generics.params);
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match &struct_def {
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ast::VariantData::Tuple(..) | ast::VariantData::Unit(..) => {
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if let ast::VariantData::Tuple(..) = struct_def {
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self.popen();
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self.commasep(Inconsistent, struct_def.fields(), |s, field| {
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s.maybe_print_comment(field.span.lo());
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s.print_outer_attributes(&field.attrs);
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s.print_visibility(&field.vis);
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s.print_type(&field.ty)
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});
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self.pclose();
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}
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self.print_where_clause(&generics.where_clause);
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if print_finalizer {
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self.word(";");
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}
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self.end();
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self.end(); // Close the outer-box.
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}
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ast::VariantData::Struct { fields, .. } => {
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self.print_where_clause(&generics.where_clause);
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self.print_record_struct_body(fields, span);
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}
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}
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}
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pub(crate) fn print_variant(&mut self, v: &ast::Variant) {
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self.head("");
|
|
self.print_visibility(&v.vis);
|
|
let generics = ast::Generics::default();
|
|
self.print_struct(&v.data, &generics, v.ident, v.span, false);
|
|
if let Some(d) = &v.disr_expr {
|
|
self.space();
|
|
self.word_space("=");
|
|
self.print_expr(&d.value, FixupContext::default())
|
|
}
|
|
}
|
|
|
|
fn print_assoc_item(&mut self, item: &ast::AssocItem) {
|
|
let ast::Item { id, span, ident, ref attrs, ref kind, ref vis, tokens: _ } = *item;
|
|
self.ann.pre(self, AnnNode::SubItem(id));
|
|
self.hardbreak_if_not_bol();
|
|
self.maybe_print_comment(span.lo());
|
|
self.print_outer_attributes(attrs);
|
|
match kind {
|
|
ast::AssocItemKind::Fn(func) => {
|
|
self.print_fn_full(ident, vis, attrs, &*func);
|
|
}
|
|
ast::AssocItemKind::Const(box ast::ConstItem { defaultness, generics, ty, expr }) => {
|
|
self.print_item_const(
|
|
ident,
|
|
None,
|
|
generics,
|
|
ty,
|
|
expr.as_deref(),
|
|
vis,
|
|
ast::Safety::Default,
|
|
*defaultness,
|
|
);
|
|
}
|
|
ast::AssocItemKind::Type(box ast::TyAlias {
|
|
defaultness,
|
|
generics,
|
|
where_clauses,
|
|
bounds,
|
|
ty,
|
|
}) => {
|
|
self.print_associated_type(
|
|
ident,
|
|
generics,
|
|
*where_clauses,
|
|
bounds,
|
|
ty.as_deref(),
|
|
vis,
|
|
*defaultness,
|
|
);
|
|
}
|
|
ast::AssocItemKind::MacCall(m) => {
|
|
self.print_mac(m);
|
|
if m.args.need_semicolon() {
|
|
self.word(";");
|
|
}
|
|
}
|
|
ast::AssocItemKind::Delegation(deleg) => self.print_delegation(
|
|
&item.attrs,
|
|
vis,
|
|
&deleg.qself,
|
|
&deleg.path,
|
|
DelegationKind::Single,
|
|
&deleg.body,
|
|
),
|
|
ast::AssocItemKind::DelegationMac(deleg) => self.print_delegation(
|
|
&item.attrs,
|
|
vis,
|
|
&deleg.qself,
|
|
&deleg.prefix,
|
|
deleg.suffixes.as_ref().map_or(DelegationKind::Glob, |s| DelegationKind::List(s)),
|
|
&deleg.body,
|
|
),
|
|
}
|
|
self.ann.post(self, AnnNode::SubItem(id))
|
|
}
|
|
|
|
fn print_delegation(
|
|
&mut self,
|
|
attrs: &[ast::Attribute],
|
|
vis: &ast::Visibility,
|
|
qself: &Option<P<ast::QSelf>>,
|
|
path: &ast::Path,
|
|
kind: DelegationKind<'_>,
|
|
body: &Option<P<ast::Block>>,
|
|
) {
|
|
if body.is_some() {
|
|
self.head("");
|
|
}
|
|
self.print_visibility(vis);
|
|
self.word_nbsp("reuse");
|
|
|
|
if let Some(qself) = qself {
|
|
self.print_qpath(path, qself, false);
|
|
} else {
|
|
self.print_path(path, false, 0);
|
|
}
|
|
match kind {
|
|
DelegationKind::Single => {}
|
|
DelegationKind::List(suffixes) => {
|
|
self.word("::");
|
|
self.word("{");
|
|
for (i, (ident, rename)) in suffixes.iter().enumerate() {
|
|
self.print_ident(*ident);
|
|
if let Some(rename) = rename {
|
|
self.nbsp();
|
|
self.word_nbsp("as");
|
|
self.print_ident(*rename);
|
|
}
|
|
if i != suffixes.len() - 1 {
|
|
self.word_space(",");
|
|
}
|
|
}
|
|
self.word("}");
|
|
}
|
|
DelegationKind::Glob => {
|
|
self.word("::");
|
|
self.word("*");
|
|
}
|
|
}
|
|
if let Some(body) = body {
|
|
self.nbsp();
|
|
self.print_block_with_attrs(body, attrs);
|
|
} else {
|
|
self.word(";");
|
|
}
|
|
}
|
|
|
|
fn print_fn_full(
|
|
&mut self,
|
|
name: Ident,
|
|
vis: &ast::Visibility,
|
|
attrs: &[ast::Attribute],
|
|
func: &ast::Fn,
|
|
) {
|
|
let ast::Fn { defaultness, generics, sig, contract, body, define_opaque } = func;
|
|
|
|
if let Some(define_opaque) = define_opaque {
|
|
for (_, path) in define_opaque {
|
|
self.word("define opaques from ");
|
|
self.print_path(path, false, 0);
|
|
self.word(",");
|
|
}
|
|
}
|
|
|
|
if body.is_some() {
|
|
self.head("");
|
|
}
|
|
self.print_visibility(vis);
|
|
self.print_defaultness(*defaultness);
|
|
self.print_fn(&sig.decl, sig.header, Some(name), generics);
|
|
if let Some(contract) = &contract {
|
|
self.nbsp();
|
|
self.print_contract(contract);
|
|
}
|
|
if let Some(body) = body {
|
|
self.nbsp();
|
|
self.print_block_with_attrs(body, attrs);
|
|
} else {
|
|
self.word(";");
|
|
}
|
|
}
|
|
|
|
fn print_contract(&mut self, contract: &ast::FnContract) {
|
|
if let Some(pred) = &contract.requires {
|
|
self.word("rustc_requires");
|
|
self.popen();
|
|
self.print_expr(pred, FixupContext::default());
|
|
self.pclose();
|
|
}
|
|
if let Some(pred) = &contract.ensures {
|
|
self.word("rustc_ensures");
|
|
self.popen();
|
|
self.print_expr(pred, FixupContext::default());
|
|
self.pclose();
|
|
}
|
|
}
|
|
|
|
pub(crate) fn print_fn(
|
|
&mut self,
|
|
decl: &ast::FnDecl,
|
|
header: ast::FnHeader,
|
|
name: Option<Ident>,
|
|
generics: &ast::Generics,
|
|
) {
|
|
self.print_fn_header_info(header);
|
|
if let Some(name) = name {
|
|
self.nbsp();
|
|
self.print_ident(name);
|
|
}
|
|
self.print_generic_params(&generics.params);
|
|
self.print_fn_params_and_ret(decl, false);
|
|
self.print_where_clause(&generics.where_clause);
|
|
}
|
|
|
|
pub(crate) fn print_fn_params_and_ret(&mut self, decl: &ast::FnDecl, is_closure: bool) {
|
|
let (open, close) = if is_closure { ("|", "|") } else { ("(", ")") };
|
|
self.word(open);
|
|
self.commasep(Inconsistent, &decl.inputs, |s, param| s.print_param(param, is_closure));
|
|
self.word(close);
|
|
self.print_fn_ret_ty(&decl.output)
|
|
}
|
|
|
|
fn print_where_clause(&mut self, where_clause: &ast::WhereClause) {
|
|
self.print_where_clause_parts(where_clause.has_where_token, &where_clause.predicates);
|
|
}
|
|
|
|
fn print_where_clause_parts(
|
|
&mut self,
|
|
has_where_token: bool,
|
|
predicates: &[ast::WherePredicate],
|
|
) {
|
|
if predicates.is_empty() && !has_where_token {
|
|
return;
|
|
}
|
|
|
|
self.space();
|
|
self.word_space("where");
|
|
|
|
for (i, predicate) in predicates.iter().enumerate() {
|
|
if i != 0 {
|
|
self.word_space(",");
|
|
}
|
|
|
|
self.print_where_predicate(predicate);
|
|
}
|
|
}
|
|
|
|
pub fn print_where_predicate(&mut self, predicate: &ast::WherePredicate) {
|
|
let ast::WherePredicate { attrs, kind, id: _, span: _, is_placeholder: _ } = predicate;
|
|
self.print_outer_attributes(attrs);
|
|
match kind {
|
|
ast::WherePredicateKind::BoundPredicate(where_bound_predicate) => {
|
|
self.print_where_bound_predicate(where_bound_predicate);
|
|
}
|
|
ast::WherePredicateKind::RegionPredicate(ast::WhereRegionPredicate {
|
|
lifetime,
|
|
bounds,
|
|
..
|
|
}) => {
|
|
self.print_lifetime(*lifetime);
|
|
self.word(":");
|
|
if !bounds.is_empty() {
|
|
self.nbsp();
|
|
self.print_lifetime_bounds(bounds);
|
|
}
|
|
}
|
|
ast::WherePredicateKind::EqPredicate(ast::WhereEqPredicate {
|
|
lhs_ty, rhs_ty, ..
|
|
}) => {
|
|
self.print_type(lhs_ty);
|
|
self.space();
|
|
self.word_space("=");
|
|
self.print_type(rhs_ty);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub(crate) fn print_where_bound_predicate(
|
|
&mut self,
|
|
where_bound_predicate: &ast::WhereBoundPredicate,
|
|
) {
|
|
self.print_formal_generic_params(&where_bound_predicate.bound_generic_params);
|
|
self.print_type(&where_bound_predicate.bounded_ty);
|
|
self.word(":");
|
|
if !where_bound_predicate.bounds.is_empty() {
|
|
self.nbsp();
|
|
self.print_type_bounds(&where_bound_predicate.bounds);
|
|
}
|
|
}
|
|
|
|
fn print_use_tree(&mut self, tree: &ast::UseTree) {
|
|
match &tree.kind {
|
|
ast::UseTreeKind::Simple(rename) => {
|
|
self.print_path(&tree.prefix, false, 0);
|
|
if let &Some(rename) = rename {
|
|
self.nbsp();
|
|
self.word_nbsp("as");
|
|
self.print_ident(rename);
|
|
}
|
|
}
|
|
ast::UseTreeKind::Glob => {
|
|
if !tree.prefix.segments.is_empty() {
|
|
self.print_path(&tree.prefix, false, 0);
|
|
self.word("::");
|
|
}
|
|
self.word("*");
|
|
}
|
|
ast::UseTreeKind::Nested { items, .. } => {
|
|
if !tree.prefix.segments.is_empty() {
|
|
self.print_path(&tree.prefix, false, 0);
|
|
self.word("::");
|
|
}
|
|
if items.is_empty() {
|
|
self.word("{}");
|
|
} else if let [(item, _)] = items.as_slice() {
|
|
self.print_use_tree(item);
|
|
} else {
|
|
self.cbox(INDENT_UNIT);
|
|
self.word("{");
|
|
self.zerobreak();
|
|
self.ibox(0);
|
|
for (pos, use_tree) in items.iter().with_position() {
|
|
let is_last = matches!(pos, Position::Last | Position::Only);
|
|
self.print_use_tree(&use_tree.0);
|
|
if !is_last {
|
|
self.word(",");
|
|
if let ast::UseTreeKind::Nested { .. } = use_tree.0.kind {
|
|
self.hardbreak();
|
|
} else {
|
|
self.space();
|
|
}
|
|
}
|
|
}
|
|
self.end();
|
|
self.trailing_comma();
|
|
self.offset(-INDENT_UNIT);
|
|
self.word("}");
|
|
self.end();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|