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From: ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: comp.lang.c
Subject: Re: enums and switch vs function calls
Date: 5 Apr 2025 11:26:32 GMT
Organization: Stefan Ram
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Richard Harnden <richard.nospam@gmail.invalid> wrote or quoted:
>int hex = colour_to_hex(10);
>... then the compiler doesn't complain that 10 is not in the enum.
>Why? Surely the compiler can tell.

  I get

|
|error: enum conversion when passing argument 1 of 'colour_to_hex' is invalid in C++ [-Wc++-compat]
|      |int hex = colour_to_hex(10);
|      |                        ^~
|note: expected 'enum colour' but argument is of type 'int'
|      | int colour_to_hex(enum colour colour)
|      |     ^~~~~~~~~~~~~
|

  with

gcc -Wc++-compat

  .