chore: switch benches to criterion plus MSRV bump to 1.56

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Install Rust Stable
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.51.0 # Pinned warnings
+          toolchain: 1.56.1 # Pinned warnings
           components: rustfmt, clippy
           default: true
       - name: Install gcc
@@ -74,7 +74,7 @@ jobs:
     - name: Install Rust Nightly
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: nightly-2021-01-01
+        toolchain: nightly-2021-11-01
         default: true
         profile: minimal
     - name: Bootstraping Grammars - Building
@@ -101,10 +101,10 @@ jobs:
     steps:
       - name: Checkout source code
         uses: actions/checkout@v3
-      - name: Install Rust Nightly
+      - name: Install Rust Stable
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly-2021-08-01
+          toolchain: stable
           profile: minimal
           components: llvm-tools-preview
           default: true
@@ -119,7 +119,7 @@ jobs:
           command: run
           args: --package pest_bootstrap
       - name: Install cargo-llvm-cov
-        run: curl -LsSf https://github.com/taiki-e/cargo-llvm-cov/releases/download/v0.3.3/cargo-llvm-cov-x86_64-unknown-linux-gnu.tar.gz | tar xzf - -C ~/.cargo/bin
+        uses: taiki-e/install-action@cargo-llvm-cov
       - name: Generate code coverage
         run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
       - name: Upload Results to Codecov

bootstrap/Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/pest-parser/pest"
 documentation = "https://docs.rs/pest"
 publish = false
 license = "MIT/Apache-2.0"
+rust-version = "1.56"
 
 [dependencies]
 pest_generator = "2.1.1" # Use the crates-io version, which (should be) known-good

derive/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["pest", "parser", "peg", "grammar"]
 categories = ["parsing"]
 license = "MIT/Apache-2.0"
 readme = "_README.md"
+rust-version = "1.56"
 
 [lib]
 name = "pest_derive"

generator/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["pest", "generator"]
 categories = ["parsing"]
 license = "MIT/Apache-2.0"
 readme = "_README.md"
+rust-version = "1.56"
 
 [features]
 default = ["std"]

grammars/Cargo.toml

@@ -11,13 +11,14 @@ keywords = ["pest", "parser", "peg", "grammar"]
 categories = ["parsing"]
 license = "MIT/Apache-2.0"
 readme = "_README.md"
+rust-version = "1.56"
 
 [dependencies]
 pest = { path = "../pest", version = "2.1.0" }
 pest_derive = { path = "../derive", version = "2.1.0" }
 
 [dev-dependencies]
-bencher = "0.1"
+criterion = "0.3"
 
 [[bench]]
 name = "json"

grammars/benches/json.rs

@@ -7,10 +7,10 @@
 // option. All files in the project carrying such notice may not be copied,
 // modified, or distributed except according to those terms.
 
-extern crate bencher;
+extern crate criterion;
 extern crate pest;
 extern crate pest_grammars;
-use bencher::{benchmark_group, benchmark_main, Bencher};
+use criterion::{criterion_group, criterion_main, Criterion};
 
 use std::fs::File;
 use std::io::Read;
@@ -19,14 +19,16 @@ use pest::Parser;
 
 use pest_grammars::json::*;
 
-fn data(b: &mut Bencher) {
+fn criterion_benchmark(c: &mut Criterion) {
     let mut file = File::open("benches/data.json").unwrap();
     let mut data = String::new();
 
     file.read_to_string(&mut data).unwrap();
 
-    b.iter(|| JsonParser::parse(Rule::json, &data).unwrap());
+    c.bench_function("json parser", |b| {
+        b.iter(|| JsonParser::parse(Rule::json, &data).unwrap())
+    });
 }
 
-benchmark_group!(benches, data);
-benchmark_main!(benches);
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

grammars/fuzz/Cargo.toml

@@ -3,6 +3,7 @@ name = "pest_grammars-fuzz"
 version = "0.0.0"
 authors = ["Automatically generated"]
 publish = false
+rust-version = "1.56"
 
 [package.metadata]
 cargo-fuzz = true

meta/Cargo.toml

@@ -13,6 +13,7 @@ license = "MIT/Apache-2.0"
 readme = "_README.md"
 exclude = ["src/grammar.pest"]
 include = ["Cargo.toml", "src/**/*", "src/grammar.rs", "_README.md", "LICENSE-*"]
+rust-version = "1.56"
 
 [dependencies]
 pest = { path = "../pest", version = "2.1.0" }

meta/fuzz/Cargo.toml

@@ -3,6 +3,7 @@ name = "pest_meta-fuzz"
 version = "0.0.0"
 authors = ["Automatically generated"]
 publish = false
+rust-version = "1.56"
 
 [package.metadata]
 cargo-fuzz = true

meta/src/validator.rs

@@ -157,7 +157,7 @@ pub fn validate_rust_keywords<'i>(
                 ErrorVariant::CustomError {
                     message: format!("{} is a rust keyword", name),
                 },
-                definition.clone(),
+                *definition,
             ))
         }
     }
@@ -180,7 +180,7 @@ pub fn validate_pest_keywords<'i>(
                 ErrorVariant::CustomError {
                     message: format!("{} is a pest keyword", name),
                 },
-                definition.clone(),
+                *definition,
             ))
         }
     }
@@ -201,7 +201,7 @@ pub fn validate_already_defined(definitions: &Vec<Span>) -> Vec<Error<Rule>> {
                 ErrorVariant::CustomError {
                     message: format!("rule {} already defined", name),
                 },
-                definition.clone(),
+                *definition,
             ))
         } else {
             defined.insert(name);
@@ -228,7 +228,7 @@ pub fn validate_undefined<'i>(
                 ErrorVariant::CustomError {
                     message: format!("rule {} is undefined", name),
                 },
-                rule.clone(),
+                *rule,
             ))
         }
     }
@@ -342,7 +342,7 @@ fn validate_repetition<'a, 'i: 'a>(rules: &'a [ParserRule<'i>]) -> Vec<Error<Rul
                                      infinitely"
                                         .to_owned()
                             },
-                            node.span.clone()
+                            node.span
                         ))
                     } else if is_non_progressing(&other.expr, &map, &mut vec![]) {
                         Some(Error::new_from_span(
@@ -352,7 +352,7 @@ fn validate_repetition<'a, 'i: 'a>(rules: &'a [ParserRule<'i>]) -> Vec<Error<Rul
                                      infinitely"
                                         .to_owned(),
                             },
-                            node.span.clone()
+                            node.span
                         ))
                     } else {
                         None
@@ -389,7 +389,7 @@ fn validate_choices<'a, 'i: 'a>(rules: &'a [ParserRule<'i>]) -> Vec<Error<Rule>>
                                     "expression cannot fail; following choices cannot be reached"
                                         .to_owned(),
                             },
-                            node.span.clone(),
+                            node.span,
                         ))
                     } else {
                         None
@@ -419,7 +419,7 @@ fn validate_whitespace_comment<'a, 'i: 'a>(rules: &'a [ParserRule<'i>]) -> Vec<E
                                 &rule.name
                             ),
                         },
-                        rule.node.span.clone(),
+                        rule.node.span,
                     ))
                 } else if is_non_progressing(&rule.node.expr, &map, &mut vec![]) {
                     Some(Error::new_from_span(
@@ -429,7 +429,7 @@ fn validate_whitespace_comment<'a, 'i: 'a>(rules: &'a [ParserRule<'i>]) -> Vec<E
                                 &rule.name
                             ),
                         },
-                        rule.node.span.clone(),
+                        rule.node.span,
                     ))
                 } else {
                     None
@@ -475,7 +475,7 @@ fn left_recursion<'a, 'i: 'a>(rules: HashMap<String, &'a ParserNode<'i>>) -> Vec
                                 chain
                             )
                         },
-                        node.span.clone()
+                        node.span
                     ));
                 }
 
@@ -499,21 +499,21 @@ fn left_recursion<'a, 'i: 'a>(rules: HashMap<String, &'a ParserNode<'i>>) -> Vec
                 }
             }
             ParserExpr::Choice(ref lhs, ref rhs) => {
-                check_expr(&lhs, rules, trace).or_else(|| check_expr(&rhs, rules, trace))
+                check_expr(lhs, rules, trace).or_else(|| check_expr(rhs, rules, trace))
             }
-            ParserExpr::Rep(ref node) => check_expr(&node, rules, trace),
-            ParserExpr::RepOnce(ref node) => check_expr(&node, rules, trace),
-            ParserExpr::Opt(ref node) => check_expr(&node, rules, trace),
-            ParserExpr::PosPred(ref node) => check_expr(&node, rules, trace),
-            ParserExpr::NegPred(ref node) => check_expr(&node, rules, trace),
-            ParserExpr::Push(ref node) => check_expr(&node, rules, trace),
+            ParserExpr::Rep(ref node) => check_expr(node, rules, trace),
+            ParserExpr::RepOnce(ref node) => check_expr(node, rules, trace),
+            ParserExpr::Opt(ref node) => check_expr(node, rules, trace),
+            ParserExpr::PosPred(ref node) => check_expr(node, rules, trace),
+            ParserExpr::NegPred(ref node) => check_expr(node, rules, trace),
+            ParserExpr::Push(ref node) => check_expr(node, rules, trace),
             _ => None,
         }
     }
 
     let mut errors = vec![];
 
-    for (ref name, ref node) in &rules {
+    for (name, node) in &rules {
         let name = (*name).clone();
 
         if let Some(error) = check_expr(node, &rules, &mut vec![name]) {

pest/Cargo.toml

@@ -11,14 +11,15 @@ keywords = ["pest", "parser", "peg", "grammar"]
 categories = ["parsing"]
 license = "MIT/Apache-2.0"
 readme = "_README.md"
+rust-version = "1.56"
 
 [features]
 default = ["std"]
 # Implements `std::error::Error` for the `Error` type
 std = ["ucd-trie/std", "thiserror"]
 # Enables the `to_json` function for `Pair` and `Pairs`
 pretty-print = ["serde", "serde_json"]
-# Enable const fn constructor for `PrecClimber` (requires nightly)
+# Enable const fn constructor for `PrecClimber`
 const_prec_climber = []
 
 [dependencies]

pest/src/error.rs

@@ -354,14 +354,12 @@ impl<R: RuleType> Error<R> {
         }
 
         if let Some(end) = end {
+            underline.push('^');
             if end - start > 1 {
-                underline.push('^');
                 for _ in 2..(end - start) {
                     underline.push('-');
                 }
                 underline.push('^');
-            } else {
-                underline.push('^');
             }
         } else {
             underline.push_str("^---")
@@ -398,13 +396,14 @@ impl<R: RuleType> Error<R> {
             1 => f(&rules[0]),
             2 => format!("{} or {}", f(&rules[0]), f(&rules[1])),
             l => {
+                let non_separated = f(&rules[l - 1]);
                 let separated = rules
                     .iter()
                     .take(l - 1)
-                    .map(|r| f(r))
+                    .map(f)
                     .collect::<Vec<_>>()
                     .join(", ");
-                format!("{}, or {}", separated, f(&rules[l - 1]))
+                format!("{}, or {}", separated, non_separated)
             }
         }
     }

pest/src/lib.rs

@@ -7,7 +7,6 @@
 // option. All files in the project carrying such notice may not be copied,
 // modified, or distributed except according to those terms.
 #![no_std]
-#![cfg_attr(feature = "const_prec_climber", feature(const_fn_trait_bound))]
 
 //! # pest. The Elegant Parser
 //!

pest/src/parser_state.rs

@@ -365,7 +365,7 @@ impl<'i, R: RuleType> ParserState<'i, R> {
         F: FnOnce(Box<Self>) -> ParseResult<Box<Self>>,
     {
         let token_index = self.queue.len();
-        let initial_pos = self.position.clone();
+        let initial_pos = self.position;
 
         let result = f(self);
 
@@ -745,7 +745,7 @@ impl<'i, R: RuleType> ParserState<'i, R> {
             }
         };
 
-        let initial_pos = self.position.clone();
+        let initial_pos = self.position;
 
         let result = f(self.checkpoint());
 
@@ -846,13 +846,13 @@ impl<'i, R: RuleType> ParserState<'i, R> {
     where
         F: FnOnce(Box<Self>) -> ParseResult<Box<Self>>,
     {
-        let start = self.position.clone();
+        let start = self.position;
 
         let result = f(self);
 
         match result {
             Ok(mut state) => {
-                let end = state.position.clone();
+                let end = state.position;
                 state.stack.push(start.span(&end));
                 Ok(state)
             }
@@ -958,7 +958,7 @@ impl<'i, R: RuleType> ParserState<'i, R> {
             return Ok(self);
         }
 
-        let mut position = self.position.clone();
+        let mut position = self.position;
         let result = {
             let mut iter_b2t = self.stack[range].iter();
             let matcher = |span: &Span| position.match_string(span.as_str());
@@ -1019,7 +1019,7 @@ impl<'i, R: RuleType> ParserState<'i, R> {
     /// ```
     #[inline]
     pub fn stack_match_pop(mut self: Box<Self>) -> ParseResult<Box<Self>> {
-        let mut position = self.position.clone();
+        let mut position = self.position;
         let mut result = true;
         while let Some(span) = self.stack.pop() {
             result = position.match_string(span.as_str());

vm/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["pest", "vm"]
 categories = ["parsing"]
 license = "MIT/Apache-2.0"
 readme = "_README.md"
+rust-version = "1.56"
 
 [dependencies]
 pest = { path = "../pest", version = "2.1.0" }