[Issue 22759] New: ImportC: cannot modify const expression from dereferencing const pointer declared within function.

d-bugmail at puremagic.com d-bugmail at puremagic.com
Thu Feb 10 11:17:38 UTC 2022


https://issues.dlang.org/show_bug.cgi?id=22759

          Issue ID: 22759
           Summary: ImportC: cannot modify const expression from
                    dereferencing const pointer declared within function.
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: ImportC, rejects-valid
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: dave287091 at gmail.com

The following fails to compile:

// test.c
static int *do_something(int * const p){
  int * const data = p;
  *data = 2; // Error: cannot modify `const` expression `*data`
  return 0;
}

This was reduced from code in sqlite.

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