Zephir\ClassDefinition::addConstant PHP Method

    public function addConstant(ClassConstant $constant)
    {
        if (isset($this->constants[$constant->getName()])) {
            throw new CompilerException("Constant '" . $constant->getName() . "' was defined more than one time");
        }
        $this->constants[$constant->getName()] = $constant;
    }

 /**
  * Creates a definition for an interface
  *
  * @param string $namespace
  * @param array $topStatement
  * @param array $docblock
  */
 public function preCompileInterface($namespace, $topStatement, $docblock)
 {
     $classDefinition = new ClassDefinition($namespace, $topStatement['name']);
     $classDefinition->setIsExternal($this->_external);
     if (isset($topStatement['extends'])) {
         foreach ($topStatement['extends'] as &$extend) {
             $extend['value'] = $this->getFullName($extend['value']);
         }
         $classDefinition->setImplementsInterfaces($topStatement['extends']);
     }
     $classDefinition->setType('interface');
     if (is_array($docblock)) {
         $classDefinition->setDocBlock($docblock["value"]);
     }
     if (isset($topStatement['definition'])) {
         $definition = $topStatement['definition'];
         /**
          * Register constants
          */
         if (isset($definition['constants'])) {
             foreach ($definition['constants'] as $constant) {
                 $classConstant = new ClassConstant($constant['name'], isset($constant['default']) ? $constant['default'] : null, isset($constant['docblock']) ? $constant['docblock'] : null);
                 $classDefinition->addConstant($classConstant);
             }
         }
         /**
          * Register methods
          */
         if (isset($definition['methods'])) {
             foreach ($definition['methods'] as $method) {
                 $classMethod = new ClassMethod($classDefinition, $method['visibility'], $method['name'], isset($method['parameters']) ? new ClassMethodParameters($method['parameters']) : null, null, isset($method['docblock']) ? $method['docblock'] : null, isset($method['return-type']) ? $method['return-type'] : null, $method);
                 $classDefinition->addMethod($classMethod, $method);
             }
         }
     }
     $this->_classDefinition = $classDefinition;
 }