From 1d48e14b70f59bbb3daa5d8dcce176500400965b Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Thu, 21 Jul 2022 16:08:38 +0200
Subject: Refactor to improve performance by passing markers around

---
 src/content/text.rs | 65 ++++++++++++++++-------------------------------------
 1 file changed, 19 insertions(+), 46 deletions(-)

(limited to 'src/content/text.rs')

diff --git a/src/content/text.rs b/src/content/text.rs
index 8d63de9..73a798a 100644
--- a/src/content/text.rs
+++ b/src/content/text.rs
@@ -29,49 +29,23 @@ use crate::construct::{
 };
 use crate::tokenizer::{Code, State, StateFnResult, Tokenizer};
 
-/// Before text.
-pub fn start(tokenizer: &mut Tokenizer, code: Code) -> StateFnResult {
-    let mut markers = vec![
-        Code::VirtualSpace, // `whitespace`
-        Code::Char('\t'),   // `whitespace`
-        Code::Char(' '),    // `hard_break_trailing`, `whitespace`
-    ];
-
-    if tokenizer.parse_state.constructs.label_start_image {
-        markers.push(Code::Char('!'));
-    }
-    if tokenizer.parse_state.constructs.character_reference {
-        markers.push(Code::Char('&'));
-    }
-    if tokenizer.parse_state.constructs.attention {
-        markers.push(Code::Char('*'));
-    }
-    if tokenizer.parse_state.constructs.autolink || tokenizer.parse_state.constructs.html_text {
-        markers.push(Code::Char('<'));
-    }
-    if tokenizer.parse_state.constructs.label_start_link {
-        markers.push(Code::Char('['));
-    }
-    if tokenizer.parse_state.constructs.character_escape
-        || tokenizer.parse_state.constructs.hard_break_escape
-    {
-        markers.push(Code::Char('\\'));
-    }
-    if tokenizer.parse_state.constructs.label_end {
-        markers.push(Code::Char(']'));
-    }
-    if tokenizer.parse_state.constructs.attention {
-        markers.push(Code::Char('_'));
-    }
-    if tokenizer.parse_state.constructs.code_text {
-        markers.push(Code::Char('`'));
-    }
-
-    before_marker(tokenizer, code, markers)
-}
+const MARKERS: [Code; 12] = [
+    Code::VirtualSpace, // `whitespace`
+    Code::Char('\t'),   // `whitespace`
+    Code::Char(' '),    // `hard_break_trailing`, `whitespace`
+    Code::Char('!'),    // `label_start_image`
+    Code::Char('&'),    // `character_reference`
+    Code::Char('*'),    // `attention`
+    Code::Char('<'),    // `autolink`, `html_text`
+    Code::Char('['),    // `label_start_link`
+    Code::Char('\\'),   // `character_escape`, `hard_break_escape`
+    Code::Char(']'),    // `label_end`
+    Code::Char('_'),    // `attention`
+    Code::Char('`'),    // `code_text`
+];
 
 /// Before text.
-fn before_marker(tokenizer: &mut Tokenizer, code: Code, markers: Vec<Code>) -> StateFnResult {
+pub fn start(tokenizer: &mut Tokenizer, code: Code) -> StateFnResult {
     match code {
         Code::None => (State::Ok, None),
         _ => tokenizer.attempt_n(
@@ -90,8 +64,8 @@ fn before_marker(tokenizer: &mut Tokenizer, code: Code, markers: Vec<Code>) -> S
                 Box::new(whitespace),
             ],
             |ok| {
-                let func = if ok { before_marker } else { before_data };
-                Box::new(move |t, c| func(t, c, markers))
+                let func = if ok { start } else { before_data };
+                Box::new(func)
             },
         )(tokenizer, code),
     }
@@ -102,7 +76,6 @@ fn before_marker(tokenizer: &mut Tokenizer, code: Code, markers: Vec<Code>) -> S
 /// ```markdown
 /// |qwe
 /// ```
-fn before_data(tokenizer: &mut Tokenizer, code: Code, markers: Vec<Code>) -> StateFnResult {
-    let copy = markers.clone();
-    tokenizer.go(|t, c| data(t, c, copy), |t, c| before_marker(t, c, markers))(tokenizer, code)
+fn before_data(tokenizer: &mut Tokenizer, code: Code) -> StateFnResult {
+    tokenizer.go(|t, c| data(t, c, &MARKERS), start)(tokenizer, code)
 }
-- 
cgit