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Why do parameterized constructors in C#, C , and Java make the parameterless constructor disappear?

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2024-10-27 04:19:29303browse

Why do parameterized constructors in C#, C  , and Java make the parameterless constructor disappear?

Why Does the Parameterless Constructor Disappear with Parameterized Constructors?

In C#, C , and Java, defining a constructor with parameters leads to the absence of a default parameterless constructor. While this behavior has been widely accepted, the reason behind it has recently come under scrutiny.

The absence of the default constructor is not a technical limitation, as compilers have the ability to generate constructors. However, this behavior is driven by practical considerations:

  • Avoiding Inferred Intent: When a constructor with parameters is defined, it implies that the class requires specific initialization logic. Providing a default parameterless constructor in this scenario would allow users to bypass these necessary steps, potentially leading to code errors.
  • Safeguarding Explicit Intentions: By requiring explicit declaration of a parameterless constructor, compilers enforce the intent of the programmer. If a default constructor is truly desired, the programmer must explicitly define it to clarify their intention.

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