PAML

Possibly A Markup Language. Probably not.

This is a rip-off of JSON and YAML. The implementation is in the rust folder (using serde). Large chunks of it were copied from the serde documentation. Currently incomplete (floats, negative numers, and raw strings can't be parsed)

PAML has 6 built-in data types:

Booleans: true and false
Numbers
null (may be unnecessary?)
Strings (3 kinds)
- Quoted (either "foo" or 'foo')
- To end of line (\foo bar baz\n...is the same as"foo bar baz"\n...`)
  - These may be too much, might just remove them
- Unquoted words (any sequence of non-whitespace characters that doesn't include {}[])
Lists (space-separated): [item1 item2 item3]
Maps (also space-separated): { k1 v1 k2 v2 }

TODO maybe treat all scalars as strings and let the deserializing thingy convert them to booleans or numbers?

Comments use #. Types can be specified using ~ (e.g. ~double 2)

No idea how to formally specify a language so here's an example:

{
  people [
    {
      name Alice
      age 100
      "favorite command" `rm -rf / # This 'comment' is actually included in the string
      human true
    }
    {
      name Bob
      age 200
      "favorite command" ls
      human false
    }
  ]
}

The Cargo.toml for this project would look something like this:

{
  package {
    name paml # Quotes are optional here
    version "0.1.0" # Would be recognized as a string rather than a number even without the quotes
    license MIT
    edition "2021" # Quotes are necessary here to show it's a string, not a number
  }
  
  dependencies {
    serde { version "1.0" features [derive] }
    # todo possibly allow commas so ^ can be { version "1.0", features [derive] }, which is less confusing
  }
}

ysthakur/paml

PAML