let mut m = lua_patterns::LuaPattern::new("one");
let text = "hello one two";
assert!(m.matches(text));
let r = m.range();
assert_eq!(r.start, 6);
assert_eq!(r.end, 9);
---
let mut m = lua_patterns::LuaPattern::new("(%a+) one");
let text = " hello one two";
assert!(m.matches(text));
assert_eq!(m.capture(0),1..10); // "hello one"
assert_eq!(m.capture(1),1..6); // "hello"
---
let mut m = lua_patterns::LuaPattern::new("OK%s+(%d+)");
let res = m.match_maybe("and that's OK 400 to you");
assert_eq!(res, Some("400"));
---
let mut m = lua_patterns::LuaPattern::new("(%a+) one");
let text = " hello one two";
let v = m.captures(text);
assert_eq!(v, &["hello one","hello"]);
---
let mut m = lua_patterns::LuaPattern::new("%S+");
let split: Vec<_> = m.gmatch("dog  cat leopard wolf  ").collect();
assert_eq!(split,&["dog","cat","leopard","wolf"]);
---
let mut m = lua_patterns::LuaPattern::new("(%S)%S+");
let split: Vec<_> = m.gmatch_captures("dog  cat leopard wolf")
       .map(|cc| cc.get(1)).collect();
assert_eq!(split,&["d","c","l","w"]);
---
let mut m = lua_patterns::LuaPattern::new("%$(%S+)");
let res = m.gsub_with("hello $dolly you're so $fine",
    |cc| cc.get(1).to_uppercase()
);
assert_eq!(res,"hello DOLLY you're so FINE");
---
let mut m = lua_patterns::LuaPattern::new("%s+");
let res = m.gsub("hello dolly you're so fine","");
assert_eq!(res, "hellodollyyou'resofine");

let mut m = lua_patterns::LuaPattern::new("(%S+)%s*=%s*(%S+);%s*");
let res = m.gsub("a=2; b=3; c = 4;", "'%2':%1 ");
assert_eq!(res, "'2':a '3':b '4':c ");
---
use std::collections::HashMap;
let mut map = HashMap::new();
// updating old lines for the 21st Century
map.insert("dolly", "baby");
map.insert("fine", "cool");
map.insert("good-looking", "pretty");

let mut m = lua_patterns::LuaPattern::new("%$%((.-)%)");
let res = m.gsub_with("hello $(dolly) you're so $(fine) and $(good-looking)",
    |cc| map.get(cc.get(1)).unwrap_or(&"?").to_string()
);
assert_eq!(res,"hello baby you're so cool and pretty");
---
let mut m = lua_patterns::LuaPattern::new("(%S+)%s*=%s*([^;]+);");
let res = m.gsub_with("alpha=bonzo; beta=felix;",
    |cc| format!("{}:'{}',", cc.get(1), cc.get(2))
);
assert_eq!(res, "alpha:'bonzo', beta:'felix',");
---
let mut words = lua_patterns::LuaPattern::new("%a%a+");
for w in words.gmatch_bytes(b"hello dolly") {
    println!("{}",String::from_utf8_lossy(w));
}
---
let patt = &[0xDE,0x00,b'+',0xBE];
let bytes = &[0xFF,0xEE,0x0,0xDE,0x0,0x0,0xBE,0x0,0x0];

let mut m = lua_patterns::LuaPattern::from_bytes(patt);
assert!(m.matches_bytes(bytes));
assert_eq!(&bytes[m.capture(0)], &[0xDE,0x00,0x00,0xBE]);
---
let bytes = &[0xFF,0xEE,0x0,0xDE,0x24,0x24,0xBE,0x0,0x0];

let patt = lua_patterns::LuaPatternBuilder::new()
    .bytes_as_hex("DE24") // less tedious than a byte slice
    .text("+")  // unescaped
    .bytes(&[0xBE]) // byte slice
    .build();

let mut m = lua_patterns::LuaPattern::from_bytes(&patt);
// picks up "DE2424BE"
---
let mut m = lua_patterns::LuaPattern::new("(%a+) one");
let text = " hello one two";
let mut v = Vec::new();
if m.capture_into(text,&mut v) {
    assert_eq!(v, &["hello one","hello"]);
}
---