Initial commit

Parses and executes substitute expressions (subexes)

So far subex has the following operations:
- Concatenation of a and b with ab
- Or with |
- Repeat maximally with *
- Repeat minimally with -
- Copy a specific character 'a'
- Copy any character '.'
- Store text matching a regex into slot 's': `$s(regex)`
- Output text in "" including loading from slots with '$'

Regexes support all the same operations as subexes minus storing and outputting

This first implementation gives very little thought to efficiency

Example:

./main 'according to all known laws of aviation' '$1(.-)$m(( .* )| ).*"$m$1"'

This swaps the first and last words of the input string

1 files changed, 3 insertions, 0 deletions

diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..6967dfd
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module main
+
+go 1.18