Import 'proc-macro-nested' rust crate
Bug: b/151760391
Test: m crosvm.experimental
Change-Id: I1b13eb0945127f323339c3b929fe1c74096371b4
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..8216174
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,5 @@
+{
+ "git": {
+ "sha1": "d29a20e44207f915f42e6d1668d2864b0152e5a8"
+ }
+}
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..e6abbe4
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,8 @@
+// This file is generated by cargo2android.py.
+
+rust_library_host_rlib {
+ name: "libproc_macro_nested",
+ crate_name: "proc_macro_nested",
+ srcs: ["src/lib.rs"],
+ edition: "2015",
+}
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f417011
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,19 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "proc-macro-nested"
+version = "0.1.4"
+authors = ["David Tolnay <dtolnay@gmail.com>"]
+description = "Support for nested proc-macro-hack invocations"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/dtolnay/proc-macro-hack"
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
new file mode 100644
index 0000000..3d64155
--- /dev/null
+++ b/Cargo.toml.orig
@@ -0,0 +1,7 @@
+[package]
+name = "proc-macro-nested"
+version = "0.1.4"
+authors = ["David Tolnay <dtolnay@gmail.com>"]
+license = "MIT OR Apache-2.0"
+description = "Support for nested proc-macro-hack invocations"
+repository = "https://github.com/dtolnay/proc-macro-hack"
diff --git a/LICENSE b/LICENSE
new file mode 120000
index 0000000..6b579aa
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1 @@
+LICENSE-APACHE
\ No newline at end of file
diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..16fe87b
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
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+6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
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+7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
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+8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
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+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
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+END OF TERMS AND CONDITIONS
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+APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
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+ file or class name and description of purpose be included on the
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+Copyright [yyyy] [name of copyright owner]
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+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
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diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..f2675cd
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2018 David Tolnay
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..623843d
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,17 @@
+name: "proc-macro-nested"
+description:
+ "Support for nested proc-macro-hack invocations"
+
+third_party {
+ url {
+ type: HOMEPAGE
+ value: "https://crates.io/crates/proc-macro-nested"
+ }
+ url {
+ type: GIT
+ value: "https://github.com/dtolnay/proc-macro-hack"
+ }
+ version: "d29a20e44207f915f42e6d1668d2864b0152e5a8"
+ last_upgrade_date { year: 2020 month: 3 day: 17 }
+ license_type: NOTICE
+}
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_APACHE2
diff --git a/NOTICE b/NOTICE
new file mode 120000
index 0000000..7a694c9
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1 @@
+LICENSE
\ No newline at end of file
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..b4aec63
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,41 @@
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::iter;
+use std::path::Path;
+
+/*
+#[doc(hidden)]
+#[macro_export]
+macro_rules! count {
+ () => { proc_macro_call_0!() };
+ (!) => { proc_macro_call_1!() };
+ (!!) => { proc_macro_call_2!() };
+ ...
+}
+*/
+
+fn main() {
+ let out_dir = env::var("OUT_DIR").unwrap();
+ let dest_path = Path::new(&out_dir).join("count.rs");
+ let mut f = File::create(&dest_path).unwrap();
+
+ let mut content = String::new();
+ content += "
+ #[doc(hidden)]
+ #[macro_export]
+ macro_rules! count {
+ ";
+ for i in 0..=64 {
+ let bangs = iter::repeat("!").take(i).collect::<String>();
+ content += &format!("({}) => {{ proc_macro_call_{}!() }};", bangs, i);
+ }
+ content += "
+ ($(!)+) => {
+ compile_error!(\"this macro does not support >64 nested macro invocations\")
+ };
+ }
+ ";
+
+ f.write_all(content.as_bytes()).unwrap();
+}
diff --git a/out/count.rs b/out/count.rs
new file mode 100644
index 0000000..de54fc6
--- /dev/null
+++ b/out/count.rs
@@ -0,0 +1,10 @@
+
+ #[doc(hidden)]
+ #[macro_export]
+ macro_rules! count {
+ () => { proc_macro_call_0!() };(!) => { proc_macro_call_1!() };(!!) => { proc_macro_call_2!() };(!!!) => { proc_macro_call_3!() };(!!!!) => { proc_macro_call_4!() };(!!!!!) => { proc_macro_call_5!() };(!!!!!!) => { proc_macro_call_6!() };(!!!!!!!) => { proc_macro_call_7!() };(!!!!!!!!) => { proc_macro_call_8!() };(!!!!!!!!!) => { proc_macro_call_9!() };(!!!!!!!!!!) => { proc_macro_call_10!() };(!!!!!!!!!!!) => { proc_macro_call_11!() };(!!!!!!!!!!!!) => { proc_macro_call_12!() };(!!!!!!!!!!!!!) => { proc_macro_call_13!() };(!!!!!!!!!!!!!!) => { proc_macro_call_14!() };(!!!!!!!!!!!!!!!) => { proc_macro_call_15!() };(!!!!!!!!!!!!!!!!) => { proc_macro_call_16!() };(!!!!!!!!!!!!!!!!!) => { proc_macro_call_17!() };(!!!!!!!!!!!!!!!!!!) => { proc_macro_call_18!() };(!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_19!() };(!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_20!() };(!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_21!() };(!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_22!() };(!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_23!() };(!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_24!() };(!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_25!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_26!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_27!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_28!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_29!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_30!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_31!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_32!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_33!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_34!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_35!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_36!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_37!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_38!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_39!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_40!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_41!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_42!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_43!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_44!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_45!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_46!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_47!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_48!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_49!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_50!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_51!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_52!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_53!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_54!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_55!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_56!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_57!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_58!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_59!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_60!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_61!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_62!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_63!() };(!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) => { proc_macro_call_64!() };
+ ($(!)+) => {
+ compile_error!("this macro does not support >64 nested macro invocations")
+ };
+ }
+
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..529ee4a
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,71 @@
+//! Support for nested invocations of proc-macro-hack expression macros.
+//!
+//! By default, macros defined through proc-macro-hack do not support nested
+//! invocations, i.e. the code emitted by a proc-macro-hack macro invocation
+//! cannot contain recursive calls to the same proc-macro-hack macro nor calls
+//! to any other proc-macro-hack macros.
+//!
+//! This crate provides opt-in support for such nested invocations.
+//!
+//! To make a macro callable recursively, add a dependency on this crate from
+//! your declaration crate and update the `#[proc_macro_hack]` re-export as
+//! follows.
+//!
+//! ```
+//! // Before
+//! # const IGNORE: &str = stringify! {
+//! #[proc_macro_hack]
+//! pub use demo_hack_impl::add_one;
+//! # };
+//! ```
+//!
+//! ```
+//! // After
+//! # const IGNORE: &str = stringify! {
+//! #[proc_macro_hack(support_nested)]
+//! pub use demo_hack_impl::add_one;
+//! # };
+//! ```
+//!
+//! No change is required within your definition crate, only to the re-export in
+//! the declaration crate.
+//!
+//! # Limitations
+//!
+//! - Nested invocations are preprocessed by a TT-muncher, so the caller's crate
+//! will be required to contain `#![recursion_limit = "..."]` if there are
+//! lengthy macro invocations.
+//!
+//! - Only up to 64 nested invocations are supported.
+
+#![no_std]
+
+// ANDROID: count.rs generated and put in the out subdirectory.
+// include!(concat!(env!("OUT_DIR"), "/count.rs"));
+include!("../out/count.rs");
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! dispatch {
+ (() $($bang:tt)*) => {
+ $crate::count!($($bang)*)
+ };
+ ((($($first:tt)*) $($rest:tt)*) $($bang:tt)*) => {
+ $crate::dispatch!(($($first)* $($rest)*) $($bang)*)
+ };
+ (([$($first:tt)*] $($rest:tt)*) $($bang:tt)*) => {
+ $crate::dispatch!(($($first)* $($rest)*) $($bang)*)
+ };
+ (({$($first:tt)*} $($rest:tt)*) $($bang:tt)*) => {
+ $crate::dispatch!(($($first)* $($rest)*) $($bang)*)
+ };
+ ((! $($rest:tt)*) $($bang:tt)*) => {
+ $crate::dispatch!(($($rest)*) $($bang)* !)
+ };
+ ((!= $($rest:tt)*) $($bang:tt)*) => {
+ $crate::dispatch!(($($rest)*) $($bang)* !)
+ };
+ (($first:tt $($rest:tt)*) $($bang:tt)*) => {
+ $crate::dispatch!(($($rest)*) $($bang)*)
+ };
+}
