remove once_cell (upon next MSRV bump!)

When the next MSRV bump might be coming up once_cell can be cut in favor of std's own Lazy primitives

Author: 2ndDerivative

meta/Cargo.toml

@@ -19,11 +19,10 @@ include = [
     "_README.md",
     "LICENSE-*",
 ]
-rust-version = "1.65"
+rust-version = "1.80"
 
 [dependencies]
 pest = { path = "../pest", version = "2.8.0" }
-once_cell = "1.8.0"
 
 [build-dependencies]
 sha2 = { version = "0.10", default-features = false }

meta/src/lib.rs

@@ -20,8 +20,8 @@
 #[macro_use]
 extern crate pest;
 
-use once_cell::sync::Lazy;
 use std::fmt::Display;
+use std::sync::LazyLock;
 
 use pest::error::Error;
 use pest::unicode::unicode_property_names;
@@ -72,5 +72,5 @@ pub fn parse_and_optimize(
 
 #[doc(hidden)]
 #[deprecated(note = "use `pest::unicode::unicode_property_names` instead")]
-pub static UNICODE_PROPERTY_NAMES: Lazy<Vec<&str>> =
-    Lazy::new(|| unicode_property_names().collect::<Vec<_>>());
+pub static UNICODE_PROPERTY_NAMES: LazyLock<Vec<&str>> =
+    LazyLock::new(|| unicode_property_names().collect::<Vec<_>>());

meta/src/validator.rs

@@ -10,8 +10,7 @@
 //! Helpers for validating pest grammars that could help with debugging
 //! and provide a more user-friendly error message.
 
-use once_cell::sync::Lazy;
-use std::collections::{HashMap, HashSet};
+use std::{collections::{HashMap, HashSet}, sync::LazyLock};
 
 use pest::error::{Error, ErrorVariant, InputLocation};
 use pest::iterators::Pairs;
@@ -20,7 +19,7 @@ use pest::Span;
 
 use crate::parser::{ParserExpr, ParserNode, ParserRule, Rule};
 
-static RUST_KEYWORDS: Lazy<HashSet<&'static str>> = Lazy::new(|| {
+static RUST_KEYWORDS: LazyLock<HashSet<&'static str>> = LazyLock::new(|| {
     [
         "abstract", "alignof", "as", "become", "box", "break", "const", "continue", "crate", "do",
         "else", "enum", "extern", "false", "final", "fn", "for", "if", "impl", "in", "let", "loop",
@@ -33,7 +32,7 @@ static RUST_KEYWORDS: Lazy<HashSet<&'static str>> = Lazy::new(|| {
     .collect()
 });
 
-static PEST_KEYWORDS: Lazy<HashSet<&'static str>> = Lazy::new(|| {
+static PEST_KEYWORDS: LazyLock<HashSet<&'static str>> = LazyLock::new(|| {
     [
         "_", "ANY", "DROP", "EOI", "PEEK", "PEEK_ALL", "POP", "POP_ALL", "PUSH", "SOI",
     ]
@@ -42,7 +41,7 @@ static PEST_KEYWORDS: Lazy<HashSet<&'static str>> = Lazy::new(|| {
     .collect()
 });
 
-static BUILTINS: Lazy<HashSet<&'static str>> = Lazy::new(|| {
+static BUILTINS: LazyLock<HashSet<&'static str>> = LazyLock::new(|| {
     [
         "ANY",
         "DROP",