revert using regex

Author: donno2048

src/tools/tidy/src/style.rs

@@ -19,6 +19,7 @@
 
 usecrate::walk::{filter_dirs, walk};
 use regex::{Regex,RegexSet};
+use std::collections::HashMap;
 use std::{ffi::OsStr, path::Path};
 
 /// Error code markdown is restricted to 80 columns because they can be
@@ -65,8 +66,39 @@ const ANNOTATIONS_TO_IGNORE: &[&str] = &[
 "//@ normalize-stderr-test",
 ];
 
+fngenerate_problems<'a>(
+consts:&'a[u32],
+letter_digit:&'aHashMap<char,char>,
+) -> implIterator<Item = u32> + 'a{
+ consts.into_iter().flat_map(move |const_value| {
+letmut problem = format!("{:X}", const_value);
+for(key, value)in letter_digit {
+ problem = problem.replace(&value.to_string(),&key.to_string());
+}
+let indexes:Vec<usize> = problem
+.chars()
+.enumerate()
+.filter_map(|(index, c)| if letter_digit.contains_key(&c){Some(index)}else{None})
+.collect();
+(0..1 << indexes.len()).map(move |i| {
+let result = problem
+.chars()
+.enumerate()
+.map(|(index, c)| {
+ifletSome(pos) = indexes.iter().position(|&x| x == index){
+if(i >> pos)&1 == 1{ letter_digit[&c]}else{ c }
+}else{
+ c
+}
+})
+.collect::<String>();
+ u32::from_str_radix(&result,0x10).unwrap()
+})
+})
+}
+
 // Intentionally written in decimal rather than hex
-constPROBLEMATIC_CONSTS:&[u32] = &[
+constROOT_PROBLEMATIC_CONSTS:&[u32] = &[
 184594741,2880289470,2881141438,2965027518,2976579765,3203381950,3405691582,3405697037,
 3735927486,3735932941,4027431614,4276992702,195934910,252707358,762133,179681982,
 173390526,
@@ -268,16 +300,14 @@ pub fn check(path: &Path, bad: &mut bool) {
 // We only check CSS files in rustdoc.
  path.extension().map_or(false, |e| e == "css") && !is_in(path,"src","librustdoc")
 }
-let problematic_consts_strings:Vec<String> = (PROBLEMATIC_CONSTS.iter().map(u32::to_string))
-.chain(PROBLEMATIC_CONSTS.iter().map(|v| {
-format!("{:x}", v)
-.replace("a","[aA4]")
-.replace("b","[bB8]")
-.replace("c","[cC]")
-.replace("d","[dD]")
-.replace("e","[eE3]")
-.replace("f","[fF]")
-}))
+let problematic_consts = generate_problems(
+ROOT_PROBLEMATIC_CONSTS,
+&[('A','4'),('B','8'),('E','3')].iter().cloned().collect(),
+)
+.collect::<Vec<u32>>();
+let problematic_consts_strings:Vec<String> = (problematic_consts.iter().map(u32::to_string))
+.chain(problematic_consts.iter().map(|v| format!("{:x}", v)))
+.chain(problematic_consts.iter().map(|v| format!("{:X}", v)))
 .collect();
 let problematic_regex = RegexSet::new(problematic_consts_strings.as_slice()).unwrap();