sourceafBson::Code.fan

** (BSON Type) - 
** Wraps a JavaScript function and default variable values.
** 
** 'scope' values are automatically evaluated in the context of the code when it is executed.
** Example:
** 
**   Syntax: fantom
**   Code("function (x) { return x + y; }", ["y":2])
** 
** Code objects let you re-use functions and change their parameters without re-interpolating a 
** Str function.
** 
** Note: 'Code' is not 'const' because the 'scope' document *could* contain `Binary` data.
** Besides, it is advantageous to change the scope / variable values.
@Serializable
class Code {
    
    ** JavaScript code.
    Str code
    
    ** Default variable values to use in the function code.
    Str:Obj? scope
  
    ** Creates a BSON Code instance.
    new makeCode(Str code, Str:Obj? scope := Str:Obj?[:]) {
        this.code = code
        this.scope = scope
    }

    ** For Fantom serialisation
    @NoDoc
    new make(|This|f) { f(this) }
}