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https://github.com/rust-lang/rust.git
synced 2025-04-17 22:46:50 +00:00
Ban custom inner attributes in expressions and statements
This commit is contained in:
Aaron Hill
parent
cb473c2c5b
commit
fe60f19f7e
@ -206,30 +206,36 @@ ast_fragments! {
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}
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}
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pub enum SupportsMacroExpansion {
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No,
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Yes { supports_inner_attrs: bool },
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}
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impl AstFragmentKind {
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crate fn dummy(self, span: Span) -> AstFragment {
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self.make_from(DummyResult::any(span)).expect("couldn't create a dummy AST fragment")
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}
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/// Fragment supports macro expansion and not just inert attributes, `cfg` and `cfg_attr`.
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pub fn supports_macro_expansion(self) -> bool {
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pub fn supports_macro_expansion(self) -> SupportsMacroExpansion {
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match self {
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AstFragmentKind::OptExpr
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| AstFragmentKind::Expr
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| AstFragmentKind::Pat
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| AstFragmentKind::Ty
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| AstFragmentKind::Stmts
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| AstFragmentKind::Items
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| AstFragmentKind::Ty
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| AstFragmentKind::Pat => SupportsMacroExpansion::Yes { supports_inner_attrs: false },
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AstFragmentKind::Items
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| AstFragmentKind::TraitItems
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| AstFragmentKind::ImplItems
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| AstFragmentKind::ForeignItems => true,
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| AstFragmentKind::ForeignItems => {
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SupportsMacroExpansion::Yes { supports_inner_attrs: true }
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}
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AstFragmentKind::Arms
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| AstFragmentKind::Fields
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| AstFragmentKind::FieldPats
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| AstFragmentKind::GenericParams
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| AstFragmentKind::Params
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| AstFragmentKind::StructFields
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| AstFragmentKind::Variants => false,
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| AstFragmentKind::Variants => SupportsMacroExpansion::No,
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}
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}
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@ -17,7 +17,7 @@ use rustc_errors::struct_span_err;
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use rustc_expand::base::Annotatable;
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use rustc_expand::base::{Indeterminate, ResolverExpand, SyntaxExtension, SyntaxExtensionKind};
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use rustc_expand::compile_declarative_macro;
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use rustc_expand::expand::{AstFragment, Invocation, InvocationKind};
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use rustc_expand::expand::{AstFragment, Invocation, InvocationKind, SupportsMacroExpansion};
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use rustc_feature::is_builtin_attr_name;
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use rustc_hir::def::{self, DefKind, NonMacroAttrKind};
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use rustc_hir::def_id;
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@ -278,12 +278,12 @@ impl<'a> ResolverExpand for Resolver<'a> {
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// Derives are not included when `invocations` are collected, so we have to add them here.
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let parent_scope = &ParentScope { derives, ..parent_scope };
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let require_inert = !invoc.fragment_kind.supports_macro_expansion();
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let supports_macro_expansion = invoc.fragment_kind.supports_macro_expansion();
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let node_id = self.lint_node_id(eager_expansion_root);
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let (ext, res) = self.smart_resolve_macro_path(
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path,
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kind,
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require_inert,
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supports_macro_expansion,
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inner_attr,
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parent_scope,
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node_id,
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@ -457,7 +457,7 @@ impl<'a> Resolver<'a> {
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&mut self,
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path: &ast::Path,
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kind: MacroKind,
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require_inert: bool,
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supports_macro_expansion: SupportsMacroExpansion,
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inner_attr: bool,
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parent_scope: &ParentScope<'a>,
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node_id: NodeId,
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@ -505,8 +505,17 @@ impl<'a> Resolver<'a> {
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let unexpected_res = if ext.macro_kind() != kind {
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Some((kind.article(), kind.descr_expected()))
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} else if require_inert && matches!(res, Res::Def(..)) {
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Some(("a", "non-macro attribute"))
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} else if matches!(res, Res::Def(..)) {
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match supports_macro_expansion {
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SupportsMacroExpansion::No => Some(("a", "non-macro attribute")),
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SupportsMacroExpansion::Yes { supports_inner_attrs } => {
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if inner_attr && !supports_inner_attrs {
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Some(("a", "non-macro inner attribute"))
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} else {
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None
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}
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}
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}
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} else {
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None
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};
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@ -1,10 +1,10 @@
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// check-pass
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// compile-flags: -Z span-debug --error-format human
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// aux-build:test-macros.rs
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#![feature(custom_inner_attributes)]
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#![feature(proc_macro_hygiene)]
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#![feature(stmt_expr_attributes)]
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#![feature(rustc_attrs)]
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#![no_std] // Don't load unnecessary hygiene information from std
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extern crate std;
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@ -25,17 +25,34 @@ struct MyStruct {
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fn bar() {
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(#![print_target_and_args(fifth)] 1, 2);
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//~^ ERROR expected non-macro inner attribute, found attribute macro
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#[print_target_and_args(tuple_attrs)] (
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#![cfg_attr(FALSE, rustc_dummy)]
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3, 4, {
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#![cfg_attr(not(FALSE), rustc_dummy(innermost))]
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5
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}
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);
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#[print_target_and_args(array_attrs)] [
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#![rustc_dummy(inner)]
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true; 0
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];
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[#![print_target_and_args(sixth)] 1 , 2];
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//~^ ERROR expected non-macro inner attribute, found attribute macro
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[#![print_target_and_args(seventh)] true ; 5];
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//~^ ERROR expected non-macro inner attribute, found attribute macro
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match 0 {
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#![print_target_and_args(eighth)]
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//~^ ERROR expected non-macro inner attribute, found attribute macro
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_ => {}
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}
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MyStruct { #![print_target_and_args(ninth)] field: true };
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//~^ ERROR expected non-macro inner attribute, found attribute macro
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}
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extern {
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32
src/test/ui/proc-macro/inner-attrs.stderr
Normal file
32
src/test/ui/proc-macro/inner-attrs.stderr
Normal file
@ -0,0 +1,32 @@
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error: expected non-macro inner attribute, found attribute macro `print_target_and_args`
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--> $DIR/inner-attrs.rs:27:9
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LL | (#![print_target_and_args(fifth)] 1, 2);
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| ^^^^^^^^^^^^^^^^^^^^^ not a non-macro inner attribute
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error: expected non-macro inner attribute, found attribute macro `print_target_and_args`
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--> $DIR/inner-attrs.rs:43:9
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LL | [#![print_target_and_args(sixth)] 1 , 2];
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| ^^^^^^^^^^^^^^^^^^^^^ not a non-macro inner attribute
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error: expected non-macro inner attribute, found attribute macro `print_target_and_args`
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--> $DIR/inner-attrs.rs:45:9
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LL | [#![print_target_and_args(seventh)] true ; 5];
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| ^^^^^^^^^^^^^^^^^^^^^ not a non-macro inner attribute
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error: expected non-macro inner attribute, found attribute macro `print_target_and_args`
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--> $DIR/inner-attrs.rs:49:12
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LL | #![print_target_and_args(eighth)]
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| ^^^^^^^^^^^^^^^^^^^^^ not a non-macro inner attribute
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error: expected non-macro inner attribute, found attribute macro `print_target_and_args`
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--> $DIR/inner-attrs.rs:54:19
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LL | MyStruct { #![print_target_and_args(ninth)] field: true };
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| ^^^^^^^^^^^^^^^^^^^^^ not a non-macro inner attribute
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error: aborting due to 5 previous errors
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@ -290,231 +290,251 @@ PRINT-ATTR INPUT (DEBUG): TokenStream [
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span: $DIR/inner-attrs.rs:17:1: 20:2 (#0),
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},
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]
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PRINT-ATTR_ARGS INPUT (DISPLAY): fifth
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PRINT-ATTR_ARGS INPUT (DISPLAY): tuple_attrs
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PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
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Ident {
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ident: "fifth",
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span: $DIR/inner-attrs.rs:27:31: 27:36 (#0),
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ident: "tuple_attrs",
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span: $DIR/inner-attrs.rs:30:29: 30:40 (#0),
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},
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]
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PRINT-ATTR INPUT (DISPLAY): (1, 2) ;
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PRINT-ATTR INPUT (DISPLAY): (# ! [cfg_attr(FALSE, rustc_dummy)] 3, 4,
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{ # ! [cfg_attr(not(FALSE), rustc_dummy(innermost))] 5 }) ;
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PRINT-ATTR INPUT (DEBUG): TokenStream [
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Group {
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delimiter: Parenthesis,
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stream: TokenStream [
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Punct {
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ch: '#',
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spacing: Joint,
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span: $DIR/inner-attrs.rs:31:9: 31:10 (#0),
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},
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Punct {
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ch: '!',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:31:10: 31:11 (#0),
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},
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Group {
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delimiter: Bracket,
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stream: TokenStream [
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Ident {
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ident: "cfg_attr",
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span: $DIR/inner-attrs.rs:31:12: 31:20 (#0),
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},
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Group {
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delimiter: Parenthesis,
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stream: TokenStream [
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Ident {
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ident: "FALSE",
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span: $DIR/inner-attrs.rs:31:21: 31:26 (#0),
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},
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Punct {
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ch: ',',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:31:26: 31:27 (#0),
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},
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Ident {
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ident: "rustc_dummy",
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span: $DIR/inner-attrs.rs:31:28: 31:39 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:31:20: 31:40 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:31:11: 31:41 (#0),
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},
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Literal {
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kind: Integer,
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symbol: "1",
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symbol: "3",
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suffix: None,
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span: $DIR/inner-attrs.rs:27:5: 27:45 (#0),
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span: $DIR/inner-attrs.rs:32:9: 32:10 (#0),
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},
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Punct {
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ch: ',',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:27:5: 27:45 (#0),
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span: $DIR/inner-attrs.rs:32:10: 32:11 (#0),
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},
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Literal {
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kind: Integer,
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symbol: "2",
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symbol: "4",
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suffix: None,
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span: $DIR/inner-attrs.rs:27:5: 27:45 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:27:5: 27:45 (#0),
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},
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Punct {
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ch: ';',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:27:5: 27:45 (#0),
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},
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]
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PRINT-ATTR_ARGS INPUT (DISPLAY): sixth
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PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
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Ident {
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ident: "sixth",
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span: $DIR/inner-attrs.rs:29:31: 29:36 (#0),
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},
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]
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PRINT-ATTR INPUT (DISPLAY): [1, 2] ;
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PRINT-ATTR INPUT (DEBUG): TokenStream [
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Group {
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delimiter: Bracket,
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stream: TokenStream [
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Literal {
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kind: Integer,
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symbol: "1",
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suffix: None,
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span: $DIR/inner-attrs.rs:29:5: 29:46 (#0),
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span: $DIR/inner-attrs.rs:32:12: 32:13 (#0),
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},
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Punct {
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ch: ',',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:29:5: 29:46 (#0),
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span: $DIR/inner-attrs.rs:32:13: 32:14 (#0),
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},
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Literal {
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kind: Integer,
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symbol: "2",
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suffix: None,
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span: $DIR/inner-attrs.rs:29:5: 29:46 (#0),
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Group {
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delimiter: Brace,
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stream: TokenStream [
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Punct {
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ch: '#',
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spacing: Joint,
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span: $DIR/inner-attrs.rs:33:13: 33:14 (#0),
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},
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Punct {
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ch: '!',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:33:14: 33:15 (#0),
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},
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Group {
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delimiter: Bracket,
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stream: TokenStream [
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Ident {
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ident: "cfg_attr",
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span: $DIR/inner-attrs.rs:33:16: 33:24 (#0),
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},
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Group {
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delimiter: Parenthesis,
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stream: TokenStream [
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Ident {
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ident: "not",
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span: $DIR/inner-attrs.rs:33:25: 33:28 (#0),
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},
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Group {
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delimiter: Parenthesis,
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stream: TokenStream [
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Ident {
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ident: "FALSE",
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span: $DIR/inner-attrs.rs:33:29: 33:34 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:33:28: 33:35 (#0),
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},
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Punct {
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ch: ',',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:33:35: 33:36 (#0),
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},
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Ident {
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ident: "rustc_dummy",
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span: $DIR/inner-attrs.rs:33:37: 33:48 (#0),
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},
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Group {
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delimiter: Parenthesis,
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stream: TokenStream [
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Ident {
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ident: "innermost",
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span: $DIR/inner-attrs.rs:33:49: 33:58 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:33:48: 33:59 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:33:24: 33:60 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:33:15: 33:61 (#0),
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},
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Literal {
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kind: Integer,
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symbol: "5",
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suffix: None,
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span: $DIR/inner-attrs.rs:34:13: 34:14 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:32:15: 35:10 (#0),
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},
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],
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span: $DIR/inner-attrs.rs:29:5: 29:46 (#0),
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span: $DIR/inner-attrs.rs:30:43: 36:6 (#0),
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},
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Punct {
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ch: ';',
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spacing: Alone,
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span: $DIR/inner-attrs.rs:29:5: 29:46 (#0),
|
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span: $DIR/inner-attrs.rs:36:6: 36:7 (#0),
|
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},
|
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]
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PRINT-ATTR_ARGS INPUT (DISPLAY): seventh
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PRINT-ATTR_ARGS INPUT (DISPLAY): array_attrs
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PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
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Ident {
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ident: "seventh",
|
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span: $DIR/inner-attrs.rs:30:31: 30:38 (#0),
|
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ident: "array_attrs",
|
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span: $DIR/inner-attrs.rs:38:29: 38:40 (#0),
|
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},
|
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]
|
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PRINT-ATTR INPUT (DISPLAY): [true ; 5] ;
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PRINT-ATTR INPUT (DISPLAY): [# ! [rustc_dummy(inner)] true ; 0] ;
|
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PRINT-ATTR INPUT (DEBUG): TokenStream [
|
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Group {
|
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delimiter: Bracket,
|
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stream: TokenStream [
|
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Punct {
|
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ch: '#',
|
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spacing: Joint,
|
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span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
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},
|
||||
Punct {
|
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ch: '!',
|
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spacing: Alone,
|
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span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
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},
|
||||
Group {
|
||||
delimiter: Bracket,
|
||||
stream: TokenStream [
|
||||
Ident {
|
||||
ident: "rustc_dummy",
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
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Group {
|
||||
delimiter: Parenthesis,
|
||||
stream: TokenStream [
|
||||
Ident {
|
||||
ident: "inner",
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
],
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
],
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
Ident {
|
||||
ident: "true",
|
||||
span: $DIR/inner-attrs.rs:30:5: 30:51 (#0),
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: ';',
|
||||
spacing: Alone,
|
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span: $DIR/inner-attrs.rs:30:5: 30:51 (#0),
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
Literal {
|
||||
kind: Integer,
|
||||
symbol: "5",
|
||||
symbol: "0",
|
||||
suffix: None,
|
||||
span: $DIR/inner-attrs.rs:30:5: 30:51 (#0),
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
],
|
||||
span: $DIR/inner-attrs.rs:30:5: 30:51 (#0),
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: ';',
|
||||
spacing: Alone,
|
||||
span: $DIR/inner-attrs.rs:30:5: 30:51 (#0),
|
||||
},
|
||||
]
|
||||
PRINT-ATTR_ARGS INPUT (DISPLAY): eighth
|
||||
PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
|
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Ident {
|
||||
ident: "eighth",
|
||||
span: $DIR/inner-attrs.rs:34:34: 34:40 (#0),
|
||||
},
|
||||
]
|
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PRINT-ATTR INPUT (DISPLAY): match 0 { _ => { } }
|
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PRINT-ATTR INPUT (DEBUG): TokenStream [
|
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Ident {
|
||||
ident: "match",
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
Literal {
|
||||
kind: Integer,
|
||||
symbol: "0",
|
||||
suffix: None,
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
Group {
|
||||
delimiter: Brace,
|
||||
stream: TokenStream [
|
||||
Ident {
|
||||
ident: "_",
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: '=',
|
||||
spacing: Joint,
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: '>',
|
||||
spacing: Alone,
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
Group {
|
||||
delimiter: Brace,
|
||||
stream: TokenStream [],
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
],
|
||||
span: $DIR/inner-attrs.rs:33:5: 36:6 (#0),
|
||||
},
|
||||
]
|
||||
PRINT-ATTR_ARGS INPUT (DISPLAY): ninth
|
||||
PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
|
||||
Ident {
|
||||
ident: "ninth",
|
||||
span: $DIR/inner-attrs.rs:38:41: 38:46 (#0),
|
||||
},
|
||||
]
|
||||
PRINT-ATTR INPUT (DISPLAY): MyStruct { field : true, } ;
|
||||
PRINT-ATTR INPUT (DEBUG): TokenStream [
|
||||
Ident {
|
||||
ident: "MyStruct",
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
},
|
||||
Group {
|
||||
delimiter: Brace,
|
||||
stream: TokenStream [
|
||||
Ident {
|
||||
ident: "field",
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: ':',
|
||||
spacing: Alone,
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
},
|
||||
Ident {
|
||||
ident: "true",
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: ',',
|
||||
spacing: Alone,
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
},
|
||||
],
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
},
|
||||
Punct {
|
||||
ch: ';',
|
||||
spacing: Alone,
|
||||
span: $DIR/inner-attrs.rs:38:5: 38:63 (#0),
|
||||
span: $DIR/inner-attrs.rs:38:43: 41:7 (#0),
|
||||
},
|
||||
]
|
||||
PRINT-ATTR_ARGS INPUT (DISPLAY): tenth
|
||||
PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
|
||||
Ident {
|
||||
ident: "tenth",
|
||||
span: $DIR/inner-attrs.rs:43:42: 43:47 (#0),
|
||||
span: $DIR/inner-attrs.rs:60:42: 60:47 (#0),
|
||||
},
|
||||
]
|
||||
PRINT-ATTR INPUT (DISPLAY): fn weird_extern() { }
|
||||
PRINT-ATTR INPUT (DEBUG): TokenStream [
|
||||
Ident {
|
||||
ident: "fn",
|
||||
span: $DIR/inner-attrs.rs:42:5: 44:6 (#0),
|
||||
span: $DIR/inner-attrs.rs:59:5: 61:6 (#0),
|
||||
},
|
||||
Ident {
|
||||
ident: "weird_extern",
|
||||
span: $DIR/inner-attrs.rs:42:5: 44:6 (#0),
|
||||
span: $DIR/inner-attrs.rs:59:5: 61:6 (#0),
|
||||
},
|
||||
Group {
|
||||
delimiter: Parenthesis,
|
||||
stream: TokenStream [],
|
||||
span: $DIR/inner-attrs.rs:42:5: 44:6 (#0),
|
||||
span: $DIR/inner-attrs.rs:59:5: 61:6 (#0),
|
||||
},
|
||||
Group {
|
||||
delimiter: Brace,
|
||||
stream: TokenStream [],
|
||||
span: $DIR/inner-attrs.rs:42:5: 44:6 (#0),
|
||||
span: $DIR/inner-attrs.rs:59:5: 61:6 (#0),
|
||||
},
|
||||
]
|
||||
|
||||
Loading…
Reference in New Issue
Block a user