enum.html 4.9 KB

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  73. <h1 class="section-header">Enum</h1><hr>
  74. <p class="section-content">
  75. Enums defines a common type for a group of related values, if you are familiar with C, you will know that C enumerations assign related names to a set of integer values, enum in Gravity are much more flexible and enables you to assign even non integer values:
  76. </p>
  77. <pre><code class="swift">
  78. enum state {
  79. nothing, // default to 0
  80. active, // default to 1
  81. inactive, // default to 2
  82. undetermined = 666,
  83. error // 667
  84. };
  85. enum math {
  86. pi = 3.141592,
  87. e = 2.718281,
  88. goldratio = 1.618033
  89. };
  90. enum company {
  91. ceo = "Gauss",
  92. cto = "Eurel",
  93. cfo = "Nostradamus"
  94. }
  95. enum mixed {
  96. one = "Hello World",
  97. two = 3.1415,
  98. three = 666,
  99. four = true
  100. }
  101. func main() {
  102. var a = state.active; // a = 1
  103. var b = math.pi; // b = 3.1415
  104. var c = company.ceo; // c = "Gauss"
  105. var d = mixed.four; // d = true
  106. }
  107. </code></pre>
  108. <p>Enum is a static operator, which means that at compile time the real value of the enum item is automatically replaced by Gravity.</p>
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