refactor(typos): Decouple parsing from checks

crates/typos/src/checks.rs

@@ -3,7 +3,6 @@ use bstr::ByteSlice;
 use crate::report;
 use crate::tokens;
 use crate::Dictionary;
-use crate::Status;
 
 pub trait Check: Send + Sync {
     fn check_str(
@@ -172,44 +171,23 @@ impl Check for Typos {
     fn check_str(
         &self,
         buffer: &str,
-        parser: &tokens::Tokenizer,
+        tokenizer: &tokens::Tokenizer,
         dictionary: &dyn Dictionary,
         reporter: &dyn report::Report,
     ) -> Result<(), std::io::Error> {
-        for ident in parser.parse_str(buffer) {
-            match dictionary.correct_ident(ident) {
-                Some(Status::Valid) => {}
-                Some(corrections) => {
-                    let byte_offset = ident.offset();
-                    let msg = report::Typo {
-                        context: None,
-                        buffer: std::borrow::Cow::Borrowed(buffer.as_bytes()),
-                        byte_offset,
-                        typo: ident.token(),
-                        corrections,
-                    };
-                    reporter.report(msg.into())?;
-                }
-                None => {
-                    for word in ident.split() {
-                        match dictionary.correct_word(word) {
-                            Some(Status::Valid) => {}
-                            Some(corrections) => {
-                                let byte_offset = word.offset();
-                                let msg = report::Typo {
-                                    context: None,
-                                    buffer: std::borrow::Cow::Borrowed(buffer.as_bytes()),
-                                    byte_offset,
-                                    typo: word.token(),
-                                    corrections,
-                                };
-                                reporter.report(msg.into())?;
-                            }
-                            None => {}
-                        }
-                    }
-                }
-            }
+        let parser = crate::ParserBuilder::new()
+            .tokenizer(tokenizer)
+            .dictionary(dictionary)
+            .typos();
+        for typo in parser.parse_str(buffer) {
+            let msg = report::Typo {
+                context: None,
+                buffer: std::borrow::Cow::Borrowed(buffer.as_bytes()),
+                byte_offset: typo.byte_offset,
+                typo: typo.typo,
+                corrections: typo.corrections,
+            };
+            reporter.report(msg.into())?;
         }
         Ok(())
     }
@@ -217,46 +195,24 @@ impl Check for Typos {
     fn check_bytes(
         &self,
         buffer: &[u8],
-        parser: &tokens::Tokenizer,
+        tokenizer: &tokens::Tokenizer,
         dictionary: &dyn Dictionary,
         reporter: &dyn report::Report,
     ) -> Result<(), std::io::Error> {
-        for ident in parser.parse_bytes(buffer) {
-            match dictionary.correct_ident(ident) {
-                Some(Status::Valid) => {}
-                Some(corrections) => {
-                    let byte_offset = ident.offset();
-                    let msg = report::Typo {
-                        context: None,
-                        buffer: std::borrow::Cow::Borrowed(buffer),
-                        byte_offset,
-                        typo: ident.token(),
-                        corrections,
-                    };
-                    reporter.report(msg.into())?;
-                }
-                None => {
-                    for word in ident.split() {
-                        match dictionary.correct_word(word) {
-                            Some(Status::Valid) => {}
-                            Some(corrections) => {
-                                let byte_offset = word.offset();
-                                let msg = report::Typo {
-                                    context: None,
-                                    buffer: std::borrow::Cow::Borrowed(buffer),
-                                    byte_offset,
-                                    typo: word.token(),
-                                    corrections,
-                                };
-                                reporter.report(msg.into())?;
-                            }
-                            None => {}
-                        }
-                    }
-                }
-            }
+        let parser = crate::ParserBuilder::new()
+            .tokenizer(tokenizer)
+            .dictionary(dictionary)
+            .typos();
+        for typo in parser.parse_bytes(buffer) {
+            let msg = report::Typo {
+                context: None,
+                buffer: std::borrow::Cow::Borrowed(buffer.as_bytes()),
+                byte_offset: typo.byte_offset,
+                typo: typo.typo,
+                corrections: typo.corrections,
+            };
+            reporter.report(msg.into())?;
         }
-
         Ok(())
     }
 
@@ -284,16 +240,19 @@ impl Check for ParseIdentifiers {
     fn check_str(
         &self,
         buffer: &str,
-        parser: &tokens::Tokenizer,
+        tokenizer: &tokens::Tokenizer,
         _dictionary: &dyn Dictionary,
         reporter: &dyn report::Report,
     ) -> Result<(), std::io::Error> {
-        let msg = report::Parse {
-            context: None,
-            kind: report::ParseKind::Identifier,
-            data: parser.parse_str(buffer).map(|i| i.token()).collect(),
-        };
-        if !msg.data.is_empty() {
+        let parser = crate::ParserBuilder::new()
+            .tokenizer(tokenizer)
+            .identifiers();
+        for word in parser.parse_str(buffer) {
+            let msg = report::Parse {
+                context: None,
+                kind: report::ParseKind::Word,
+                data: word.token(),
+            };
             reporter.report(msg.into())?;
         }
 
@@ -303,16 +262,19 @@ impl Check for ParseIdentifiers {
     fn check_bytes(
         &self,
         buffer: &[u8],
-        parser: &tokens::Tokenizer,
+        tokenizer: &tokens::Tokenizer,
         _dictionary: &dyn Dictionary,
         reporter: &dyn report::Report,
     ) -> Result<(), std::io::Error> {
-        let msg = report::Parse {
-            context: None,
-            kind: report::ParseKind::Identifier,
-            data: parser.parse_bytes(buffer).map(|i| i.token()).collect(),
-        };
-        if !msg.data.is_empty() {
+        let parser = crate::ParserBuilder::new()
+            .tokenizer(tokenizer)
+            .identifiers();
+        for word in parser.parse_bytes(buffer) {
+            let msg = report::Parse {
+                context: None,
+                kind: report::ParseKind::Word,
+                data: word.token(),
+            };
             reporter.report(msg.into())?;
         }
 
@@ -343,19 +305,17 @@ impl Check for ParseWords {
     fn check_str(
         &self,
         buffer: &str,
-        parser: &tokens::Tokenizer,
+        tokenizer: &tokens::Tokenizer,
         _dictionary: &dyn Dictionary,
         reporter: &dyn report::Report,
     ) -> Result<(), std::io::Error> {
-        let msg = report::Parse {
-            context: None,
-            kind: report::ParseKind::Word,
-            data: parser
-                .parse_str(buffer)
-                .flat_map(|ident| ident.split().map(|i| i.token()))
-                .collect(),
-        };
-        if !msg.data.is_empty() {
+        let word_parser = crate::ParserBuilder::new().tokenizer(tokenizer).words();
+        for word in word_parser.parse_str(buffer) {
+            let msg = report::Parse {
+                context: None,
+                kind: report::ParseKind::Word,
+                data: word.token(),
+            };
             reporter.report(msg.into())?;
         }
 
@@ -365,19 +325,17 @@ impl Check for ParseWords {
     fn check_bytes(
         &self,
         buffer: &[u8],
-        parser: &tokens::Tokenizer,
+        tokenizer: &tokens::Tokenizer,
         _dictionary: &dyn Dictionary,
         reporter: &dyn report::Report,
     ) -> Result<(), std::io::Error> {
-        let msg = report::Parse {
-            context: None,
-            kind: report::ParseKind::Word,
-            data: parser
-                .parse_bytes(buffer)
-                .flat_map(|ident| ident.split().map(|i| i.token()))
-                .collect(),
-        };
-        if !msg.data.is_empty() {
+        let parser = crate::ParserBuilder::new().tokenizer(tokenizer).words();
+        for word in parser.parse_bytes(buffer) {
+            let msg = report::Parse {
+                context: None,
+                kind: report::ParseKind::Word,
+                data: word.token(),
+            };
             reporter.report(msg.into())?;
         }
 

crates/typos/src/dict.rs

@@ -47,3 +47,18 @@ pub trait Dictionary: Send + Sync {
 
     fn correct_word<'s, 'w>(&'s self, word: crate::tokens::Word<'w>) -> Option<Status<'s>>;
 }
+
+pub(crate) struct NullDictionary;
+
+impl Dictionary for NullDictionary {
+    fn correct_ident<'s, 'w>(
+        &'s self,
+        _ident: crate::tokens::Identifier<'w>,
+    ) -> Option<Status<'s>> {
+        None
+    }
+
+    fn correct_word<'s, 'w>(&'s self, _word: crate::tokens::Word<'w>) -> Option<Status<'s>> {
+        None
+    }
+}

crates/typos/src/lib.rs

@@ -1,7 +1,9 @@
 mod dict;
+mod parser;
 
 pub mod checks;
 pub mod report;
 pub mod tokens;
 
-pub use crate::dict::*;
+pub use dict::*;
+pub use parser::*;

crates/typos/src/parser.rs

@@ -0,0 +1,164 @@
+use crate::tokens;
+use crate::Dictionary;
+
+#[derive(Clone)]
+pub struct ParserBuilder<'p, 'd> {
+    tokenizer: Option<&'p tokens::Tokenizer>,
+    dictionary: &'d dyn Dictionary,
+}
+
+impl<'p> ParserBuilder<'p, 'static> {
+    pub fn new() -> Self {
+        Default::default()
+    }
+}
+
+impl<'p, 'd> ParserBuilder<'p, 'd> {
+    pub fn tokenizer(mut self, tokenizer: &'p tokens::Tokenizer) -> Self {
+        self.tokenizer = Some(tokenizer);
+        self
+    }
+
+    pub fn dictionary<'d1>(self, dictionary: &'d1 dyn Dictionary) -> ParserBuilder<'p, 'd1> {
+        ParserBuilder {
+            tokenizer: self.tokenizer,
+            dictionary: dictionary,
+        }
+    }
+
+    pub fn typos(&self) -> TyposParser<'p, 'd> {
+        TyposParser {
+            tokenizer: self.tokenizer.unwrap_or_else(|| &DEFAULT_TOKENIZER),
+            dictionary: self.dictionary,
+        }
+    }
+
+    pub fn identifiers(&self) -> IdentifiersParser<'p> {
+        IdentifiersParser {
+            tokenizer: self.tokenizer.unwrap_or_else(|| &DEFAULT_TOKENIZER),
+        }
+    }
+
+    pub fn words(&self) -> WordsParser<'p> {
+        WordsParser {
+            tokenizer: self.tokenizer.unwrap_or_else(|| &DEFAULT_TOKENIZER),
+        }
+    }
+}
+
+impl<'p> Default for ParserBuilder<'p, 'static> {
+    fn default() -> Self {
+        Self {
+            tokenizer: None,
+            dictionary: &crate::NullDictionary,
+        }
+    }
+}
+
+static DEFAULT_TOKENIZER: once_cell::sync::Lazy<tokens::Tokenizer> =
+    once_cell::sync::Lazy::new(|| tokens::Tokenizer::new());
+
+#[derive(Clone)]
+pub struct TyposParser<'p, 'd> {
+    tokenizer: &'p tokens::Tokenizer,
+    dictionary: &'d dyn Dictionary,
+}
+
+impl<'p, 'd> TyposParser<'p, 'd> {
+    pub fn parse_str<'b, 's: 'b>(&'s self, buffer: &'b str) -> impl Iterator<Item = Typo<'b>> {
+        self.tokenizer
+            .parse_str(buffer)
+            .flat_map(move |ident| self.process_ident(ident))
+    }
+
+    pub fn parse_bytes<'b, 's: 'b>(&'s self, buffer: &'b [u8]) -> impl Iterator<Item = Typo<'b>> {
+        self.tokenizer
+            .parse_bytes(buffer)
+            .flat_map(move |ident| self.process_ident(ident))
+    }
+
+    fn process_ident<'i, 's: 'i>(
+        &'s self,
+        ident: tokens::Identifier<'i>,
+    ) -> impl Iterator<Item = Typo<'i>> {
+        match self.dictionary.correct_ident(ident) {
+            Some(crate::Status::Valid) => itertools::Either::Left(None.into_iter()),
+            Some(corrections) => {
+                let typo = Typo {
+                    byte_offset: ident.offset(),
+                    typo: ident.token(),
+                    corrections,
+                };
+                itertools::Either::Left(Some(typo).into_iter())
+            }
+            None => itertools::Either::Right(
+                ident
+                    .split()
+                    .filter_map(move |word| self.process_word(word)),
+            ),
+        }
+    }
+
+    fn process_word<'w, 's: 'w>(&'s self, word: tokens::Word<'w>) -> Option<Typo<'w>> {
+        match self.dictionary.correct_word(word) {
+            Some(crate::Status::Valid) => None,
+            Some(corrections) => {
+                let typo = Typo {
+                    byte_offset: word.offset(),
+                    typo: word.token(),
+                    corrections,
+                };
+                Some(typo)
+            }
+            None => None,
+        }
+    }
+}
+
+#[derive(Clone, Debug, derive_setters::Setters)]
+#[non_exhaustive]
+pub struct Typo<'m> {
+    pub byte_offset: usize,
+    pub typo: &'m str,
+    pub corrections: crate::Status<'m>,
+}
+
+impl<'m> Default for Typo<'m> {
+    fn default() -> Self {
+        Self {
+            byte_offset: 0,
+            typo: "",
+            corrections: crate::Status::Invalid,
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct IdentifiersParser<'p> {
+    tokenizer: &'p tokens::Tokenizer,
+}
+
+impl<'p> IdentifiersParser<'p> {
+    pub fn parse_str(&self, buffer: &'p str) -> impl Iterator<Item = tokens::Identifier<'p>> {
+        self.tokenizer.parse_str(buffer)
+    }
+
+    pub fn parse_bytes(&self, buffer: &'p [u8]) -> impl Iterator<Item = tokens::Identifier<'p>> {
+        self.tokenizer.parse_bytes(buffer)
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct WordsParser<'p> {
+    tokenizer: &'p tokens::Tokenizer,
+}
+
+impl<'p> WordsParser<'p> {
+    pub fn parse_str(&self, buffer: &'p str) -> impl Iterator<Item = tokens::Word<'p>> {
+        self.tokenizer.parse_str(buffer).flat_map(|i| i.split())
+    }
+
+    pub fn parse_bytes(&self, buffer: &'p [u8]) -> impl Iterator<Item = tokens::Word<'p>> {
+        self.tokenizer.parse_bytes(buffer).flat_map(|i| i.split())
+    }
+}

crates/typos/src/report.rs

@@ -168,7 +168,7 @@ pub struct Parse<'m> {
     #[serde(flatten)]
     pub context: Option<Context<'m>>,
     pub kind: ParseKind,
-    pub data: Vec<&'m str>,
+    pub data: &'m str,
 }
 
 impl<'m> Default for Parse<'m> {
@@ -176,7 +176,7 @@ impl<'m> Default for Parse<'m> {
         Self {
             context: None,
             kind: ParseKind::Identifier,
-            data: vec![],
+            data: "",
         }
     }
 }
@@ -265,7 +265,7 @@ impl Report for PrintBrief {
                 writeln!(io::stdout(), "{}", msg.path.display())?;
             }
             Message::Parse(msg) => {
-                writeln!(io::stdout(), "{}", itertools::join(msg.data.iter(), " "))?;
+                writeln!(io::stdout(), "{}", msg.data)?;
             }
             Message::Error(msg) => {
                 log::error!("{}: {}", context_display(&msg.context), msg.msg);
@@ -289,7 +289,7 @@ impl Report for PrintLong {
                 writeln!(io::stdout(), "{}", msg.path.display())?;
             }
             Message::Parse(msg) => {
-                writeln!(io::stdout(), "{}", itertools::join(msg.data.iter(), " "))?;
+                writeln!(io::stdout(), "{}", msg.data)?;
             }
             Message::Error(msg) => {
                 log::error!("{}: {}", context_display(&msg.context), msg.msg);