Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.2)
// Compass (v1.0.0.alpha.17)
// ----

@function to-json($input) {
  $output: "";
  $type: type-of($input);
  $length: length($input);
  $i: 1;
  
  @if $type == list {
    $output: "[ ";
    
    @each $item in $input {
      $item: to-json($item);
      $output: $output + $item;
      
      @if ($i != $length) {
        $output: $output + ", ";
      }
      
      $i: $i + 1;
    }
    
    $output: $output + " ]";
  }
  
  @if $type == map {
    $output: "{ ";
    
    @each $key, $value in $input {
      $value: to-json($value);
      $output: $output + '"' + $key + '"' + " : " + $value + "";

      @if ($i != $length) {
        $output: $output + ", ";
      }
      
      $i: $i + 1;
    }
    
    $output: $output + " }";
  }
  
  @if $type == number {
    $output: $input;
  }
  
  @if $type == string {
    $output: '"' + $input + '"';
  }
  
  @if $type == bool {
    $output: $input;
  }
  
  @return $output;
}

/* results = #{ to-json( (a: a, b: ( 1, false, ( a: 1, b: 2 ) ), c: 3) ) } */

SassMeister-output.css

/* results = { "a" : "a", "b" : [ 1, false, { "a" : 1, "b" : 2 } ], "c" : 3 } */

test-json.json

{
  "options" : [
    "verbose",
    "warnings"
  ],

  "tests" : [
    {
      "title" : "The positive number function should return all positive numbers",
      "passed" : true,
      "assertions" : [
        {
          "title" : "expected 1 to be a positive number",
          "passed" : true
        },
        {
          "title" : "expected 2 to be a positive number",
          "passed" : true
        },
        {
          "title" : "expected 3 to be a positive number",
          "passed" : true
        }
      ]
    },

    {
      "title" : "The positive number function should return false for zero",
      "passed" : false,
      "assertions" : [
        {
          "title" : "expected 0 to equal false",
          "passed" : false
        }
      ]
    },

    {
      "title" : "The positive number function should return false for all negative numbers",
      "passed" : true,
      "assertions" : [
        {
          "title" : "expected false not to be true",
          "passed" : true
        },
        {
          "title" : "expected false not to be true",
          "passed" : true
        },
        {
          "title" : "expected false not to be true",
          "passed" : true
        }
      ]
    }
  ],

  "results" : {
    "stats" : "✔ ✔ ✔ ✗ ✔ ✔ ✔",
    "assertions" : 7,
    "tests" : 3,
    "passed" : 2,
    "failed" : 1
  },

  "warnings" : [
    {
      "title" : "The 'equal' matcher should only be used for numbers, try 'be' instead.",
      "instances" : [
        "The positive number function should return false for zero: expected 0 to equal false"
      ]
    }
  ]
}