[LLVMbugs] [Bug 23105] New: C: allow conversion of pointer to arrays to pointers to const arrays

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23105

            Bug ID: 23105
           Summary: C: allow conversion of pointer to arrays to pointers
                    to const arrays
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: uecker at eecs.berkeley.edu
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Starting with version 5, gcc will not warn anymore about incompatible pointer
types when converting a pointer to an array to a pointer to a const array. (The
underlying issue in the C standard is that the qualifier is attached to the
element type, so the usual rule which allows addition of a qualifier to a
pointer target does not apply). Please also consider this change for clang.
This would allow reasonable code such as the following to work without
warnings:

void foo(const double input[3][3]);

double b[3][3];
foo(b);

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