nvvson

• a json-like array-only structure
• for readonly config-file using

install

• npm install nvvson

usage

  const {der,ser}   = require("nvvson");

  #(....)   MEANS a comment;    "(" AND ")" must be escaped \( \)

  begin with "."  means a key,   key MUST be [_a-z][_a-z0-9]+

  begin with "'" means:
     'u   undefined
     'n   null
     't   true
     'f   false
     others are INVALID

  literal value only support <positive-int> OR <positive-bigint> OR 0, NOT support <negtive>, NOT support <double>
       
          
  @<s|d|b|n|j|v|t>(...) 

     @s(...)  MEANS a string:   "(" AND ")" must be escaped \( \) 
     @d(...)  MEANS a double
     @b(...)  MEANS a bigint
     @n(...)  MEANS a double OR bigint
     @t(...)  MEANS Date
     @j(...)  MEANS JSON          "(" AND ")" must be escaped \( \)

  
  comma CAN be   "," | ";" | <white-space> | <newline>      
  colon CAN be   ":" | "=" | <white-space> | <newline>

  block CAN only be  "[" "]" , can NOT be "{" "}"

  NOT support quote :  '"' "'" "`"  all are INVALID 

  

example

deserialize

var code = `
[
    'u, 'n, 't, 'f,
    1, @d(1.1), 123456789123456789123456789123456789, @t(2024-01-21T05:49:07.948Z), @s(a b c d e f g h),
   .k0   : 1,
   .kl   : @d(1.1),
   .k2   : 123456789123456789123456789123456789,   
   .k3   : @j([1,2,3,4]),                          #(this is a comment)
   .k4   : [
       'u, 'n, 't,'f,
       1, @d(1.1), 123456789123456789123456789123456789, @t(2024-01-21T05:49:07.948Z), @s(a b c d e f g h),
	   .k0   : 1,
	   .kl   : @d(1.1),
   ]
]
`;

 var val = der(code);

	[
	  undefined,
	  null,
	  true,
	  false,
	  1,
	  1.1,
	  123456789123456789123456789123456789n,
	  2024-01-21T05:49:07.948Z,
	  'a b c d e f g h',
	  1,
	  1.1,
	  123456789123456789123456789123456789n,
	  [ 1, 2, 3, 4 ],
	  [
	    undefined,
	    null,
	    true,
	    false,
	    1,
	    1.1,
	    123456789123456789123456789123456789n,
	    2024-01-21T05:49:07.948Z,
	    'a b c d e f g h',
	    1,
	    1.1,
	    k0: [Getter/Setter],
	    kl: [Getter/Setter]
	  ],
	  k0: [Getter/Setter],
	  kl: [Getter/Setter],
	  k2: [Getter/Setter],
	  k3: [Getter/Setter],
	  k4: [Getter/Setter]
	]

	> val[9]
	1
	> val.k0
	1
	> 
	> val[9] === val.k0
	true
	> val[9]=1000
	1000
	> val.k0
	1000
	> 
	> val.k0 = 1111
	1111
	> val[9]
	1111
	> 

serialize NOT symmetric WITH deserialize: the key will be dropped by default, vson is mainly for deser,

> ser(val)
"['u,'n,'t,'f,@d(1),@d(1.1),@b(123456789123456789123456789123456789),@t(2024-01-21T05:49:07.948Z),@s(a b c d e f g h),@d(1),@d(1.1),@b(123456789123456789123456789123456789),[@d(1),@d(2),@d(3),@d(4),],['u,'n,'t,'f,@d(1),@d(1.1),@b(123456789123456789123456789123456789),@t(2024-01-21T05:49:07.948Z),@s(a b c d e f g h),@d(1),@d(1.1),],]"
> 
> console.log(ser(val))
['u,'n,'t,'f,@d(1),@d(1.1),@b(123456789123456789123456789123456789),@t(2024-01-21T05:49:07.948Z),@s(a b c d e f g h),@d(1),@d(1.1),@b(123456789123456789123456789123456789),[@d(1),@d(2),@d(3),@d(4),],['u,'n,'t,'f,@d(1),@d(1.1),@b(123456789123456789123456789123456789),@t(2024-01-21T05:49:07.948Z),@s(a b c d e f g h),@d(1),@d(1.1),],]
> 
> der(ser(val))
[
  undefined,
  null,
  true,
  false,
  1,
  1.1,
  123456789123456789123456789123456789n,
  2024-01-21T05:49:07.948Z,
  'a b c d e f g h',
  1,
  1.1,
  123456789123456789123456789123456789n,
  [ 1, 2, 3, 4 ],
  [
    undefined,
    null,
    true,
    false,
    1,
    1.1,
    123456789123456789123456789123456789n,
    2024-01-21T05:49:07.948Z,
    'a b c d e f g h',
    1,
    1.1
  ]
]
> 

METHODS

APIS

 der(String)               -> NamedTuple 
 ser(NamedTuple, treat_ary_as_named_tuple=false, enable_circular_check = false)           -> String

LICENSE

• ISC