Struct

You can create a struct by instantiating the CGT::Struct class (here abbreviated as CGT::Struct) and adding methods to it.

method_full_name = CGT::Method.new("full_name", "String")
method_full_name.add_body("John Doe".dump)

struct_type = CGT::Struct.new("Person")
struct_type.add_method(method_full_name)

puts struct_type.generate

Output:

struct Person
  def full_name : String
    "John Doe"
  end
end

Included modules

• Crygen::Modules::Annotation
• Crygen::Modules::ClassVar
• Crygen::Modules::Comment
• Crygen::Modules::InstanceVar
• Crygen::Modules::Method
• Crygen::Modules::Mixin
• Crygen::Modules::Property

Adding multiple methods

You can add several methods at once using add_methods:

method_first_name = CGT::Method.new("first_name", "String")
method_first_name.add_body("John".dump)

method_last_name = CGT::Method.new("last_name", "String")
method_last_name.add_body("Doe".dump)

struct_type = CGT::Struct.new("User")
struct_type.add_methods(method_first_name, method_last_name)

puts struct_type.generate

Output:

struct User
  def first_name : String
    "John"
  end

  def last_name : String
    "Doe"
  end
end

Inheriting from an abstract struct

You can specify a parent abstract struct when creating a new struct:

struct_type = CGT::Struct.new("Employee", "AbstractEmployee")
puts struct_type.generate

Output:

struct Employee < AbstractEmployee
end

Adding properties, mixins, and comments

You can also add properties, mixins, and comments to your struct:

struct_type = CGT::Struct.new("Point")
struct_type.add_property("x", "Int32")
struct_type.add_property("y", "Int32")
struct_type.add_mixin("JSON::Serializable")
struct_type.add_comment("Represents a 2D point.")

puts struct_type.generate

Output:

# Represents a 2D point.
struct Point
  include JSON::Serializable

  property x : Int32
  property y : Int32
end