CODEWITHSUNDEEP
c
Shakil Ahamed
Shakil Ahamed

Reputation: 577

unqualified version of type in ANSI C

The Constraints portion of Section 6.3.2.2 of the ANSI C Standard includes the phrase:

Each argument shall have a type such that its value may be assigned to an object with the unqualified version of the type of its corresponding parameter.

Then, What the term 'unqualified version of type' means?

Upvotes: 4

Views: 1108

Answers (2)

unwind
unwind

Reputation: 399863

The C99 draft contains the following language, about the use of the word "qualified":

Any type so far mentioned is an unqualified type. Each unqualified type has several qualified versions of its type, corresponding to the combinations of one, two, or all three of the const, volatile, and restrict qualifiers.

The qualified or unqualified versions of a type are distinct types that belong to the same type category and have the same representation and alignment requirements.

So your quote says that an argument having a const int must match a value of type int, and so on.

Upvotes: 5

Some programmer dude
Some programmer dude

Reputation: 409196

Without bothering to check the specification, I would venture a guess that it has to do with e.g. const or volatile keywords.

For example, if you have an argument of type const int, you should be able to assign it to a variable of type int (without the const qualifier).

Upvotes: 3

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