SYML is a configuration language similar to YAML, but may be more user-friendly

Syntax (Imprecise)

• _ (white space):
  / \t
• hex:
  [0-9A-Fa-f]
• nl:
  \r? \n
  / eof
• comment:
  ; (!nl any-char)*
• cnl:
  (_ comment? \r? \n)+
  / eof
• escape:
  \ ( [\\nrt"' \t]
  / x hex{2}
  / u (hex{4} / { hex+ })
  / U hex{8}
  )
• str_ignore:
  \ comment? \r? \n _
• simple-val:
  ([!#$%&()*+./0-9<=>?@A-Z\\^_`a-z|~\p{XID_Start}] / - ! )
  [!#$%&()*+./0-9<=>?@A-Z\\^_`a-z|~\-'\p{XID_Continue}]*
  / ' [^'\r\n]* '
  / " str_ignore* ((escape / [^\r\n\\]) str_ignore*)* "
• inline-value:
  [ _ (simple-val (_ , _ simple-val)* _ ,?)? _ ]
  / { _ (simple-val _ : _ inline-value (_ , simple-val _ : _ inline-value)* _ ,?)? _ }
  / simple-val
• list:
  - ivalue \n (cnl indent(+2) - ivalue(+2))*
• ivalue:
  list
  / simple-val _ : (_ simple-val _ :)* (
  cnl() (indent list(+0) / indent(+2) ivalue(+2))
  / inline-value
  )
  / inline-value
• value:
  cnl()? ivalue(0) cnl()

Examples

- name: jack
  age: 18
- name: jones
  age: 21
  ids:
  - - 1
    - 2
  - [3, 4] ; inline

like JSON5:

[
    {
        name: "jack",
        age: "18",
    },
    {
        name: "jones",
        age: "21",
        ids: [
            [1, 2],
            [3, 4],
        ]
    }
]

How To Use

use cli utils:

cargo install syml --features cli-utils

use lib:

let _value = syml::parser::value(r#"
; comment
- {a: 1, b: 2}
- [3, 4]
- 5
- x: 2
  y: 3
"#).unwrap();