Fuzion • Tutorial • Empty Constructors

Empty Constructors

In Fuzion, it is fairly common to declare constructor fields that do not contain any code or inner declarations, such as the feature person in this example:

example is

  person(name String, age i32) is
    # empty code block

  p := person "Methuselah" 969
  say "{p.name}, {p.age}yo"

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example is
  person(name String, age i32) is
    # empty code block
  p := person "Methuselah" 969
  say "{p.name}, {p.age}yo"
 
 
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What are effects?

If a constructor feature contains inner declarations is is required:

example is

  person(name String, age i32) is
    show => say "$name, {age}yo"

  p := person "Methuselah" 969
  p.show

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example is
  person(name String, age i32) is
    show => say "$name, {age}yo"
  p := person "Methuselah" 969
  p.show
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

last changed: 2025-04-11

next: Assignments