grex

Generate regex from examples

$ grex [foo] [bar] [baz]

$ grex -i [example1] [example2]

$ grex -d [test1] [test2]

$ grex -e [example]

$ grex --with-anchors [examples...]

grex [options] test-strings

grex generates regular expressions from user-provided test strings. It analyzes the input examples and produces a regex that matches all of them.
The tool supports various character class conversions and can detect patterns like repetitions. It is useful for quickly creating regexes without manual pattern analysis.

TEST-STRINGS

Example strings to generate regex from.

Convert digits to \d.

Convert spaces to \s.

Convert alphanumerics to \w.

Case insensitive matching.

Escape all non-ASCII chars.

Add start/end anchors.

Detect repetitions.

Display help information.

Generated regex may be overly specific or general. Manual refinement often needed. Complex patterns may require additional examples.

grex was created by Peter M. Stahl as a command-line tool to simplify regex creation through example-based learning.

grep(1), sed(1), regex(7)