mirror of
https://github.com/pezkuwichain/pezkuwi-telemetry.git
synced 2026-04-22 18:28:06 +00:00
James Wilson
111 lines
3.1 KiB
Rust
111 lines
3.1 KiB
Rust
// Source code for the Substrate Telemetry Server.
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// Copyright (C) 2021 Parity Technologies (UK) Ltd.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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/**
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This macro checks to see whether an iterable container contains each of the
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match items given, in the order that they are given in (but not necessarily
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contiguous, ie other items may be interspersed between the ones we're looking
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to match).
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Similar to `matches!`.
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```
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enum Item {
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Foo { a: usize },
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Bar(bool),
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Wibble
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}
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use Item::*;
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let does_contain: bool = test_utils::contains_matches!(
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vec![Foo { a: 2 }, Wibble, Bar(true), Foo { a: 100 }],
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Foo { a: 2 } | Foo { a: 3 },
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Bar(true),
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Foo {..}
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);
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assert!(does_contain);
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```
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*/
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#[macro_export]
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macro_rules! contains_matches {
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($expression:expr, $( $( $pattern:pat )|+ $( if $guard:expr )? ),+ $(,)?) => {{
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let mut items = $expression.into_iter();
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// For each pattern we want to match, we consume items until
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// we find the first match, and then break the loop and do the
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// same again with the next pattern. If we run out of items, we
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// set the validity to false and stop trying to match. Else, we
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// match againse each of the patterns and return true.
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let mut is_valid = true;
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$(
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while is_valid {
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let item = match items.next() {
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Some(item) => item,
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None => {
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is_valid = false;
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break;
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}
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};
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match item {
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$( $pattern )|+ $( if $guard )? => break,
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_ => continue
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}
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}
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)+
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is_valid
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}}
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}
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/**
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This macro checks to see whether an iterable container contains each of the
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match items given, in the order that they are given in (but not necessarily
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contiguous, ie other items may be interspersed between the ones we're looking
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to match).
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Panics if this is not the case.
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```
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enum Item {
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Foo { a: usize },
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Bar(bool),
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Wibble
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}
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use Item::*;
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test_utils::assert_contains_matches!(
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vec![Foo { a: 2 }, Wibble, Bar(true), Foo { a: 100 }],
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Foo { a: 2 },
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Bar(true),
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Foo {..}
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);
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```
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*/
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#[macro_export]
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macro_rules! assert_contains_matches {
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($expression:expr, $( $( $pattern:pat )|+ $( if $guard:expr )? ),+ $(,)?) => {
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let does_contain_matches = $crate::contains_matches!(
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$expression,
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$( $( $pattern )|+ $( if $guard )? ),+
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);
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assert!(does_contain_matches);
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}
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}
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