Re: [Pharo-users] YAML parser (2017)

Aug. 18, 2017

      Hi,

Phil Back has kindly fixed the PetitYAML so it mostly works now.
The only problem I've encountered was some weird misparsing of strings containing slashes, e.g. "5/".

In any case:

Install PetitParser (from Catalog or somewhere), load PetitYAML package (this is already loaded when loading PP from catalog).

And then parse your string

```
PPYAMLGrammar parse: '
language: c
sudo: false
cache:
  directories:
    - opensmalltalk-vm/.thirdparty-cache
git:
  depth: "5"'.
```

"Dictionary(
	'cache'->a Dictionary(
		'directories'->#('opensmalltalk-vm/.thirdparty-cache')
	)
	'git'->a Dictionary(
		'depth'->'5'
	)
	'language'->'c'
	'sudo'->'false'
)"

Take a look at PPYAMLGrammarTest>>testTravisYml too.

Peter

On Fri, Aug 18, 2017 at 09:45:00AM +0200, H. Hirzel wrote:
...
I am not looking for a complete implementation which is quite an effort
but rather for a subset which does simple things such as parsing
- a list of hashes (dictionaries),
- a dictionary of dictionaries (nested to arbitrary depths),
- multi-line comments
--Hannes
On 8/16/17, H. Hirzel <hannes.hirzel@gmail.com> wrote:
...
Are there any news about a YAML parser for Pharo 5 / 6.1?
--Hannes
On 5/29/17, Peter Uhnak <i.uhnak@gmail.com> wrote:
...
Hi,
do we have a working parser for YAML?
There's PPYAMLGrammar (in PetitParser), however it doesn't seem to work
in
Pharo 6 at all (not even tests pass).
In Pharo 5 the tests are green, but using it on YAML content still
fails...
with small fix I managed it to "pass", however the output seems to be a
very
fine-grained AST decomposition and not the expected output
(dictionaries/arrays).
So do we have some else/working?
YAML specs have BNF descriptions, so maybe SmaCC can generate it? (I
don't
know SmaCC, so maybe this is not how it works.)
Thanks,
Peter