Help with ISO standards

[night spire]

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[glacial narwhal]

programs written for C99 can almost always compile as C11

programs that use new features from C11 cannot compile as C99, but arguably the only completely new feature is _Generic

anonymous struct/union members were already a widely-used gcc extension before C11

[queen sphinx]

thanks for the explanation

[glacial narwhal]

[queen sphinx]

wait so

new feature is _generic, but otherwise it would be able to compile?

[glacial narwhal]

almost every C11 program that doesn't use _Generic is also a C99 program

and almost every C99 program is also a C11 program

there are a few dark corners, but unless you're doing something REALLY weird, most programs written in one work with the other

[queen sphinx]

ah ok

so if im correct

any or (most) programs written in c99 standard will compile on the c11 compiler

and this is the same for any program written in c11 will compile on the c99 compiler?

[glacial narwhal]

C11 is basically C99 with some extra features

[queen sphinx]

oh cool

[glacial narwhal]

and those features don't come up much

[queen sphinx]

cool

so is this correct?

[glacial narwhal]

C11 has features that didn't exist in C99

if you use alignas, alignof, or generic, then your code won't compile under C99

[queen sphinx]

i still dont rlly get it

damn blocked

[night spire]

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