CODEWITHSUNDEEP
cjava-native-interface
Jin Kwon
Jin Kwon

Reputation: 21992

Is there any way to get actual type from a string value?

I'm learning the C programming language.

Is there any good/reasonable way to get the actual type from a string value?

I already heard the sizeof operator is almost a compile-time thing.

Say we have the following string literal which may be provided in runtime.

char *name_of_long_long_int = "long long int";

Is there any way to do something effects following?

size_t size_of_long_long_int = sizeof(long long int);

Upvotes: 0

Views: 74

Answers (1)

shreyans800755
shreyans800755

Reputation: 354

No, there is not built-in function that can do such mapping.

But you can do this yourself using if-else or switch structure that is limited to your application.

There is one library called "typedef.h" //It is available in C++, I don't know about C

It has some functions like type.id() which can do reverse mapping, may be you can find a way in that lib.

//Only for C++ not for C as you requested but still you might get some idea :

You can also do this with dictionary using map

Here's very helpful link for that : Is there a way to instantiate objects from a string holding their class name?

Upvotes: 1

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