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# ---------------------------------------------------------------------------------------
# Keep version (Please don't modify)
# ---------------------------------------------------------------------------------------
version: 3.3.0

  at Object.exports.assertColor (F:\Blog\node_modules\stylus\lib\utils.js:255:13)
  at Evaluator.adjust (F:\Blog\node_modules\stylus\lib\functions\adjust.js:14:9)
  at Evaluator.invokeBuiltin (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1054:30)
  at Evaluator.visitCall (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:516:16)
  at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
  at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
  at Evaluator.visitExpression (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:644:26)
  at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
  at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
  at Evaluator.eval (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1238:23)
  at Evaluator.invoke (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1083:16)
  at Evaluator.invokeFunction (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1012:15)
  at Evaluator.visitCall (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:522:16)
  at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
  at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
  at Evaluator.visitExpression (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:644:26)
  at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
  at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
  at Evaluator.visitIdent (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:551:22)
  at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
  at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
  at Evaluator.visitRoot (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:707:27) {
cause: Error: F:/Blog/node_modules/stylus/lib/functions/index.styl:133:3
   129|
   130| // lighten by the given amount
   131|
   132| lighten(color, amount)
   133|   adjust(color, 'lightness', amount)
----------^
   134|
   135| // decrease opacity by amount
   136|

TypeError: expected rgba or hsla, but got ident:$default-text-color

    at Object.exports.assertColor (F:\Blog\node_modules\stylus\lib\utils.js:255:13)
    at Evaluator.adjust (F:\Blog\node_modules\stylus\lib\functions\adjust.js:14:9)
    at Evaluator.invokeBuiltin (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1054:30)
    at Evaluator.visitCall (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:516:16)
    at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
    at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
    at Evaluator.visitExpression (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:644:26)
    at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
    at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
    at Evaluator.eval (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1238:23)
    at Evaluator.invoke (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1083:16)
    at Evaluator.invokeFunction (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:1012:15)
    at Evaluator.visitCall (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:522:16)
    at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
    at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
    at Evaluator.visitExpression (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:644:26)
    at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
    at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
    at Evaluator.visitIdent (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:551:22)
    at Evaluator.Visitor.visit (F:\Blog\node_modules\stylus\lib\visitor\index.js:28:40)
    at Evaluator.visit (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:160:18)
    at Evaluator.visitRoot (F:\Blog\node_modules\stylus\lib\visitor\evaluator.js:707:27) {
  lineno: 133,
  column: 3,
  filename: 'F:/Blog/node_modules/stylus/lib/functions/index.styl',
  stylusStack: '',
  input: 'called-from = ()\n' +
    '\n' +
    'vendors = moz webkit o ms official\n' +
    '\n' +
    '// stringify the given arg\n' +
    '\n' +
    '-string(arg)\n' +
    "  type(arg) + ' ' + arg\n" +
    '\n' +
    '// require a color\n' +
    '\n' +
    'require-color(color)\n' +
    "  unless color is a 'color'\n" +
    "    error('RGB or HSL value expected, got a ' + -string(color))\n" +
    '\n' +
    '// require a unit\n' +
    '\n' +
    'require-unit(n)\n' +
    "  unless n is a 'unit'\n" +
    "    error('unit expected, got a ' + -string(n))\n" +
    '\n' +
    '// require a string\n' +
    '\n' +
    'require-string(str)\n' +
    "  unless str is a 'string' or str is a 'ident'\n" +
    "    error('string expected, got a ' + -string(str))\n" +
    '\n' +
    '// Math functions\n' +
    '\n' +
    "abs(n) { math(n, 'abs') }\n" +
    'min(a, b) { a < b ? a : b }\n' +
    'max(a, b) { a > b ? a : b }\n' +
    '\n' +
    '// Trigonometrics\n' +
    "PI = -math-prop('PI')\n" +
    '\n' +
    'radians-to-degrees(angle)\n' +
    '  angle * (180 / PI)\n' +
    '\n' +
    'degrees-to-radians(angle)\n' +
    '  angle * (PI / 180)\n' +
    '\n' +
    'sin(n)\n' +
    "  n = unit(n) == 'deg' ? degrees-to-radians(unit(n, '')) : unit(n, '')\n" +
    "  round(math(n, 'sin'), 9)\n" +
    '\n' +
    'cos(n)\n' +
    "  n = unit(n) == 'deg' ? degrees-to-radians(unit(n, '')) : unit(n, '')\n" +
    "  round(math(n, 'cos'), 9)\n" +
    '\n' +
    '// Rounding Math functions\n' +
    '\n' +
    'ceil(n, precision = 0)\n' +
    '  multiplier = 10 ** precision\n' +
    "  math(n * multiplier, 'ceil') / multiplier\n" +
    '\n' +
    'floor(n, precision = 0)\n' +
    '  multiplier = 10 ** precision\n' +
    "  math(n * multiplier, 'floor') / multiplier\n" +
    '\n' +
    'round(n, precision = 0)\n' +
    '  multiplier = 10 ** precision\n' +
    "  math(n * multiplier, 'round') / multiplier\n" +
    '\n' +
    '// return the sum of the given numbers\n' +
    '\n' +
    'sum(nums)\n' +
    '  sum = 0\n' +
    '  sum += n for n in nums\n' +
    '\n' +
    '// return the average of the given numbers\n' +
    '\n' +
    'avg(nums)\n' +
    '  sum(nums) / length(nums)\n' +
    '\n' +
    '// return a unitless number, or pass through\n' +
    '\n' +
    'remove-unit(n)\n' +
    '  if typeof(n) is "unit"\n' +
    '    unit(n, "")\n' +
    '  else\n' +
    '    n\n' +
    '\n' +
    '// convert a percent to a decimal, or pass through\n' +
    '\n' +
    'percent-to-decimal(n)\n' +
    '  if unit(n) is "%"\n' +
    '    remove-unit(n) / 100\n' +
    '  else\n' +
    '    n\n' +
    '\n' +
    '// check if n is an odd number\n' +
    '\n' +
    'odd(n)\n' +
    '  1 == n % 2\n' +
    '\n' +
    '// check if n is an even number\n' +
    '\n' +
    'even(n)\n' +
    '  0 == n % 2\n' +
    '\n' +
    '// check if color is light\n' +
    '\n' +
    'light(color)\n' +
    '  lightness(color) >= 50%\n' +
    '\n' +
    '// check if color is dark\n' +
    '\n' +
    'dark(color)\n' +
    '  lightness(color) < 50%\n' +
    '\n' +
    '// desaturate color by amount\n' +
    '\n' +
    'desaturate(color, amount)\n' +
    "  adjust(color, 'saturation', - amount)\n" +
    '\n' +
    '// saturate color by amount\n' +
    '\n' +
    "saturate(color = '', amount = 100%)\n" +
    "  if color is a 'color'\n" +
    "    adjust(color, 'saturation', amount)\n" +
    '  else\n' +
    '    unquote( "saturate(" + color + ")" )\n' +
    '\n' +
    '// darken by the given amount\n' +
    '\n' +
    'darken(color, amount)\n' +
    "  adjust(color, 'lightness', - amount)\n" +
    '\n' +
    '// lighten by the given amount\n' +
    '\n' +
    'lighten(color, amount)\n' +
    "  adjust(color, 'lightness', amount)\n" +
    '\n' +
    '// decrease opacity by amount\n' +
    '\n' +
    'fade-out(color, amount)\n' +
    '  color - rgba(black, percent-to-decimal(amount))\n' +
    '\n' +
    '// increase opacity by amount\n' +
    '\n' +
    'fade-in(color, amount)\n' +
    '  color + rgba(black, percent-to-decimal(amount))\n' +
    '\n' +
    '// spin hue by a given amount\n' +
    '\n' +
    'spin(color, amount)\n' +
    '  color + unit(amount, deg)\n' +
    '\n' +
    '// mix two colors by a given amount\n' +
    '\n' +
    'mix(color1, color2, weight = 50%)\n' +
    '  unless weight in 0..100\n' +
    '    error("Weight must be between 0% and 100%")\n' +
    '\n' +
    '  if length(color1) == 2\n' +
    '    weight = color1[0]\n' +
    '    color1 = color1[1]\n' +
    '\n' +
    '  else if length(color2) == 2\n' +
    '    weight = 100 - color2[0]\n' +
    '    color2 = color2[1]\n' +
    '\n' +
    '  require-color(color1)\n' +
    '  require-color(color2)\n' +
    '\n' +
    "  p = unit(weight / 100, '')\n" +
    '  w = p * 2 - 1\n' +
    '\n' +
    '  a = alpha(color1) - alpha(color2)\n' +
    '\n' +
    '  w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2\n' +
    '  w2 = 1 - w1\n' +
    '\n' +
    '  channels = (red(color1) red(color2)) (green(color1) green(color2)) (blue(color1) blue(color2))\n' +
    '  rgb = ()\n' +
    '\n' +
    '  for pair in channels\n' +
    '    push(rgb, floor(pair[0] * w1 + pair[1] * w2))\n' +
    '\n' +
    '  a1 = alpha(color1) * p\n' +
    '  a2 = alpha(color2) * (1 - p)\n' +
    '  alpha = a1 + a2\n' +
    '\n' +
    '  rgba(rgb[0], rgb[1], rgb[2], alpha)\n' +
    '\n' +
    '// invert colors, leave alpha intact\n' +
    '\n' +
    "invert(color = '')\n" +
    "  if color is a 'color'\n" +
    '    rgba(#fff - color, alpha(color))\n' +
    '  else\n' +
    '    unquote( "invert(" + color + ")" )\n' +
    '\n' +
    '// give complement of the given color\n' +
    '\n' +
    'complement( color )\n' +
    '  spin( color, 180 )\n' +
    '\n' +
    '// give grayscale of the given color\n' +
    '\n' +
    "grayscale( color = '' )\n" +
    "  if color is a 'color'\n" +
    '    desaturate( color, 100% )\n' +
    '  else\n' +
    '    unquote( "grayscale(" + color + ")" )\n' +
    '\n' +
    '// mix the given color with white\n' +
    '\n' +
    'tint( color, percent )\n' +
    '  mix( white, color, percent )\n' +
    '\n' +
    '// mix the given color with black\n' +
    '\n' +
    'shade( color, percent )\n' +
    '  mix( black, color, percent )\n' +
    '\n' +
    '// return the last value in the given expr\n' +
    '\n' +
    'last(expr)\n' +
    '  expr[length(expr) - 1]\n' +
    '\n' +
    '// return keys in the given pairs or object\n' +
    '\n' +
    'keys(pairs)\n' +
    '  ret = ()\n' +
    "  if type(pairs) == 'object'\n" +
    '    for key in pairs\n' +
    '      push(ret, key)\n' +
    '  else\n' +
    '    for pair in pairs\n' +
    '      push(ret, pair[0]);\n' +
    '  ret\n' +
    '\n' +
    '// return values in the given pairs or object\n' +
    '\n' +
    'values(pairs)\n' +
    '  ret = ()\n' +
    "  if type(pairs) == 'object'\n" +
    '    for key, val in pairs\n' +
    '      push(ret, val)\n' +
    '  else\n' +
    '    for pair in pairs\n' +
    '      push(ret, pair[1]);\n' +
    '  ret\n' +
    '\n' +
    '// join values with the given delimiter\n' +
    '\n' +
    'join(delim, vals...)\n' +
    "  buf = ''\n" +
    '  vals = vals[0] if length(vals) == 1\n' +
    '  for val, i in vals\n' +
    '    buf += i ? delim + val : val\n' +
    '\n' +
    '// add a CSS rule to the containing block\n' +
    '\n' +
    '// - This definition allows add-property to be used as a mixin\n' +
    '// - It has the same effect as interpolation but allows users\n' +
    '//   to opt for a functional style\n' +
    '\n' +
    'add-property-function = add-property\n' +
    'add-property(name, expr)\n' +
    '  if mixin\n' +
    '    {name} expr\n' +
    '  else\n' +
    '    add-property-function(name, expr)\n' +
    '\n' +
    'prefix-classes(prefix)\n' +
    '  -prefix-classes(prefix, block)\n' +
    '\n' +
    '// Caching mixin, use inside your functions to enable caching by extending.\n' +
    '\n' +
    '$stylus_mixin_cache = {}\n' +
    'cache()\n' +
    "  $key = (current-media() or 'no-media') + '__' + called-from[0] + '__' + arguments\n" +
    '  if $key in $stylus_mixin_cache\n' +
    '    @extend {"$cache_placeholder_for_" + $stylus_mixin_cache[$key]}\n' +
    "  else if 'cache' in called-from\n" +
    '    {block}\n' +
    '  else\n' +
    '    $id = length($stylus_mixin_cache)\n' +
    '\n' +
    '    &,\n' +
    '    /$cache_placeholder_for_{$id}\n' +
    '      $stylus_mixin_cache[$key] = $id\n' +
    '      {block}\n' +
    '\n' +
    '// Percentage function to convert a number, e.g. ".45", into a percentage, e.g. "45%"\n' +
    '\n' +
    'percentage(num)\n' +
    "  return unit(num * 100, '%')\n" +
    '\n' +
    '// Returns the position of a `value` within a `list`\n' +
    '\n' +
    'index(list, value)\n' +
    '  for val, i in list\n' +
    '    return i if val == value\n'
},
isOperational: true,
lineno: 133,
column: 3,
filename: 'F:/Blog/node_modules/stylus/lib/functions/index.styl',
stylusStack: '',
input: 'called-from = ()\n' +
  '\n' +
  'vendors = moz webkit o ms official\n' +
  '\n' +
  '// stringify the given arg\n' +
  '\n' +
  '-string(arg)\n' +
  "  type(arg) + ' ' + arg\n" +
  '\n' +
  '// require a color\n' +
  '\n' +
  'require-color(color)\n' +
  "  unless color is a 'color'\n" +
  "    error('RGB or HSL value expected, got a ' + -string(color))\n" +
  '\n' +
  '// require a unit\n' +
  '\n' +
  'require-unit(n)\n' +
  "  unless n is a 'unit'\n" +
  "    error('unit expected, got a ' + -string(n))\n" +
  '\n' +
  '// require a string\n' +
  '\n' +
  'require-string(str)\n' +
  "  unless str is a 'string' or str is a 'ident'\n" +
  "    error('string expected, got a ' + -string(str))\n" +
  '\n' +