From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- rust/macros/helpers.rs | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 rust/macros/helpers.rs (limited to 'rust/macros/helpers.rs') diff --git a/rust/macros/helpers.rs b/rust/macros/helpers.rs new file mode 100644 index 000000000..cdc7dc613 --- /dev/null +++ b/rust/macros/helpers.rs @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0 + +use proc_macro::{token_stream, TokenTree}; + +pub(crate) fn try_ident(it: &mut token_stream::IntoIter) -> Option { + if let Some(TokenTree::Ident(ident)) = it.next() { + Some(ident.to_string()) + } else { + None + } +} + +pub(crate) fn try_literal(it: &mut token_stream::IntoIter) -> Option { + if let Some(TokenTree::Literal(literal)) = it.next() { + Some(literal.to_string()) + } else { + None + } +} + +pub(crate) fn try_byte_string(it: &mut token_stream::IntoIter) -> Option { + try_literal(it).and_then(|byte_string| { + if byte_string.starts_with("b\"") && byte_string.ends_with('\"') { + Some(byte_string[2..byte_string.len() - 1].to_string()) + } else { + None + } + }) +} + +pub(crate) fn expect_ident(it: &mut token_stream::IntoIter) -> String { + try_ident(it).expect("Expected Ident") +} + +pub(crate) fn expect_punct(it: &mut token_stream::IntoIter) -> char { + if let TokenTree::Punct(punct) = it.next().expect("Reached end of token stream for Punct") { + punct.as_char() + } else { + panic!("Expected Punct"); + } +} + +pub(crate) fn expect_byte_string(it: &mut token_stream::IntoIter) -> String { + try_byte_string(it).expect("Expected byte string") +} + +pub(crate) fn expect_end(it: &mut token_stream::IntoIter) { + if it.next().is_some() { + panic!("Expected end"); + } +} -- cgit v1.2.3