Export Functions of Template Libraries

Export functions are the interface functions of template libraries, which can be called by strategies that reference the template library.

Examples

• Different programming languages have different formats for writing template libraries. The following are example codes for declaring and implementing export functions in template libraries:

  • javascript
  • python
  • rust

  
      javascript
      
      
  /*
  -- 策略引用该模板以后直接用 $.Test() 调用此方法
  -- main 函数在策略中不会触发, 只做为模板调试的入口
  */
  $.Test = function() {
      Log('Test')
  }
  
  function main() {
      $.Test()
  }
  

  
      python
      
      
  def Test():
      Log("template call")
  
  # 导出Test函数, 主策略可以通过ext.Test()调用
  ext.Test = Test

  
      rust
      
      
  // after referencing this template, a strategy calls it as ext::Test()
  // functions called by the strategy must be declared pub
  pub fn Test() {
      Log!("template call");
  }
  

• Strategies written in Blockly visual mode can implement library functions through JavaScript language template libraries. Please use the following format.

  
              javascript
              
              
  /*blockly
      {
          "type": "ext_testA",
          "message0": "testA|testA",
          "template": "function(){return 99;}()",
          "order": "ORDER_ATOMIC",
          "output": "Number"
      },{
          "type": "ext_MA",
          "message0": "MA 周期 %1| MA Period %1",
          "args0": [{
              "type": "input_value",
              "check": "Number"
          }],
          "template": "(function(){var r = exchange.GetRecords(); return (!r || r.length < %1) ? false : TA.MA(r, %1); })()",
          "order": "ORDER_ATOMIC",
          "output": null,
          "colour": 85
      }
  */