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sexp

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S-expression swiss knife

// repository documentation

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Sexp - The s-expression toolkit
===============================

A suite of tools for working with s-expressions from the command line.
It contains subcommands for pretty printing, querying, and modifying
sexps, as well as some conversions to and from other formats.

See also:

- [Sexp query by example](doc/query_by_example.md)
- [Sexp query formal semantics](doc/query_semantics.md)
- [Sexp change formal semantics](doc/change_semantics.md)
- [Sexp change by example](doc/change_by_example.md)

```sh
$ sexp -help
the s-expression toolkit

sexp SUBCOMMAND

=== subcommands ===

assemble        Assemble a lists of parts into sexps. Sexp part lists are
                  separated by newlines.
  change          transform an s-expression
  flatten         Flatten a list of sexp into its parts. Each part on its own
                  line.
  get             extract parts of an s-expression
  of-xml          convert XML from stdin into an s-expression
  pp              Pretty print S expressions in a human-friendly way.
  print           pretty-print an s-expression
  query           query an s-expression
  resolve-macros  resolve macros in a sexp
  restructure     recover structure of an s-expression
  select          Use CSS-style selectors to traverse sexp trees
  to-csv          converts a list of record s-expressions into CSV format
  validate        validate a sequence of s-expressions on stdin
  version         print version information
  help            explain a given subcommand (perhaps recursively)
```

## Examples

Colorize the output of `ocamlc -dlambda`:

<style type="text/css">
 
</style>
<pre class="console-output">
$ ocamlc -dlambda -c fact.ml 2>&amp;1 | sexp pp -color
(setglobal Fact! (
 letrec
 (fact/1008 (
 function n/1009 (
 if (== n/1009 0) 1 (* n/1009 (apply fact/1008 (- n/1009 1))))))
 (makeblock 0 fact/1008)))
</pre>

Extract the list of command run by jenga:

```
$ cat query.sexp
(pipe
 (variant Job_started 1)
 (index 1)
 (wrap (cat (field prog) (pipe (field args) each)))
)
$ sexp query -file query.sexp < .jenga/.jenga.debug
(ocamlc -c foo.mli)
(ocamlc -c foo.ml)
...
```

sexp

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