tame/tamer/src/xir/pred.rs

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// XIR predicates
//
// Copyright (C) 2014-2022 Ryan Specialty Group, LLC.
//
// This file is part of TAME.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//! Functional predicates for XIR token streams.
use super::{QName, Token};
#[inline]
pub fn not<T>(mut f: impl FnMut(&T) -> bool) -> impl FnMut(&T) -> bool {
move |x| !f(x)
}
#[inline]
pub fn open(name: QName) -> impl FnMut(&Token) -> bool {
move |tok| matches!(tok, Token::Open(tokname, _) if *tokname == name)
}
#[inline]
pub fn close(name: QName) -> impl FnMut(&Token) -> bool {
move |tok| matches!(tok, Token::Close(Some(tokname), _) if *tokname == name)
}