Re: [Tinycc-devel] __LINE__ and #line undelying type

[Christian Jullien]

Hi,

C standard says:
_ _LINE_ _ The presumed line number (within the current source file) of the 
current
source line (an integer constant).

So, it should be a signed integer (same as int on your running architecture 
which is internally either int32_t or int64_t depending on how int is 
represented).
For type safety, it is important that __LINE__ is an int because a lot of code 
uses this type to call functions as below:

void debug(const char* file, int line, const char* msg) {
  printf("%s(%d) %s\n", file, line msg);
}

gcc, clang and tcc all use an int as you can see below, so tcc looks right to 
me:

jullien@sims4:~ $ more foo.c
#include <stdio.h>

#define TYPEOF(x) _Generic((x), \
    char: "char", \
    short: "short", \
    int: "int", \
    unsigned int: "unsigned int", \
    long: "long", \
    unsigned long: "unsigned long", \
    long long: "long long", \
    float: "float", \
    double: "double", \
    long double: "long double")

int
main() {
  unsigned int k;
  int i;
  printf("__LINE__: %s\n", TYPEOF(__LINE__));
  printf("unsigned: %s\n", TYPEOF(k));
  printf("signed:   %s\n", TYPEOF(i));
}

jullien@sims4:~ $ gcc -std=c11 foo.c -o foo && ./foo
__LINE__: int
unsigned: unsigned int
signed:   int
jullien@sims4:~ $ clang -std=c11 foo.c -o foo && ./foo
__LINE__: int
unsigned: unsigned int
signed:   int
jullien@sims4:~ $ tcc -std=c11 foo.c -o foo && ./foo
__LINE__: int
unsigned: unsigned int
signed:   int

-----Original Message-----
From: Tinycc-devel [mailto:tinycc-devel-bounces+eligis=orange.fr@nongnu.org] On 
Behalf Of Yakov
Sent: Friday, April 16, 2021 03:18
To: Tinycc-devel@nongnu.org
Subject: [Tinycc-devel] __LINE__ and #line undelying type

I remember #line was limited to 65535 on tcc recently, but now it is
limited to 294967295 (max int32), when this was changed?

Also I think it should be 42949672965 instead (max uint32) as in GCC and Clang.

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