---
name: qr
status: documented
runtime: pp
source: src/runtime/pp/regex/match_op.rs
---
```{index} single: qr; Perl built-in (pp runtime)
```

# qr

//

## Synopsis

```perl
my $re = qr/pattern/flags;
$str =~ $re;             # use in match
$str =~ /${re}suffix/;   # interpolate into pattern
```

## Description

Creates a precompiled regular expression object.

Compiles the pattern (from `OpData::Pm` or a runtime-interpolated
string in `runtime_regex_pattern`) into a regex and wraps it as a
blessed reference in the `Regexp` class.  The stringified form is
`(?^flags:pattern)`, matching perl5 behaviour.

The returned object can be used directly in pattern matches,
interpolated into other patterns, or stored in variables, arrays,
and hashes for later use.

## See also

m//, s///, perlre, perlop