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Comment by Kenji | Hacker News Reader

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Kenji·

The header code generated contains

typedef int bool;

I am not sure if I want that in my header.

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What's the right type then? There is no bool type in C90. It appears in C99.

I've seen this in the wild, including the top answer on a StackOverflow question:

#define bool int

http://stackoverflow.com/questions/4159713/how-to-use-boolea...

Besides, if you want correct code, don't ask a tool to guess it! This tool is for patching up fragments enough to get them through the compiler front end analysis.

Well if you care about space efficiency, char is smaller than int.

Indeed, this can be an arguable choice. But notice the project is still in research, it's not an end-user product yet. Eventually, we'll offer options so the user can specifier whether he/she wants such a thing (or inference of standard/posix library functions, for example).

Why not? C does not have a book type and it is standard to use either char or int, depending on if you're concerned about space or about time.

C does have a bool type as well. I have not seen it used much in the C code that I have encountered. See http://pubs.opengroup.org/onlinepubs/009695399/basedefs/stdb...

It's "new" as of C99.

The actual boolean type is called _Bool, but <stdbool.h> provides macros that let bool, true, and false work.

What I find weird is that it's not really used. Why generate bool, true, and false?

You're right, it's not always used. Please notice my other answer above, the project is still a prototype. Eventually, we'll filter what actually goes to the generated header and we'll allow the user to specify whether he/she wants bools, inference of C/POSIX library functions, etc.

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