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Implicit int to enum [message #1796157]

Sun, 07 October 2018 13:28

Eclipse User

Hi,

I am building Unit Tests with Eclipse Luna as C projects. The files to be tested are compiled with a different embedded compiler. Eclipse uses the GCC C compiler.

I got the problem that the original files use implicit typecasts from integer to enum and I am looking for a way that Eclipse also use implicit typecasts. E.g. :
Code: [Select all] [Show/ hide]Rufus MapQuest UpToDate

typedef enum
{
e0 = 0U,
e1 = 1U,
e2 = 2U
} Enumtype;
void function(void)
{
int i=1;
Enumtype foo = i;
}

error I9167: argument of type "unsigned int" is incompatible with parameter of type "Enumtype"

The solution I found is:
Enumtype foo = (Enumtype) i;

However, this solution is unsatisfying in this case. I already checked the code analysis settings but I didn't found the option. Is there a way to enable these implicit casts?

[Updated on: Sun, 07 October 2018 19:38] by Moderator

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Re: Implicit int to enum [message #1796166 is a reply to message #1796157]

Sun, 07 October 2018 18:51

Tauno Voipio

Messages: 742
Registered: August 2014

Senior Member

I did not find an as ancient version of Eclipse as Luna. Using Photon on Kubuntu 18.04LTS Linux with GCC version 7.3.0 the following compiled and run without a hitch:

--- clip clip ---

#include <stdio.h>
#include <stdlib.h>

typedef enum
{
e0 = 0U,
e1 = 1U,
e2 = 2U
} Enumtype;

int main(void)
{
int i = 1;
Enumtype foo = i;

printf("hello, %u", foo);
return EXIT_SUCCESS;
}

--- clip clip ---

Your error message looks strange: there's nothing like it in CDT or GCC. Are you sure that you're not attempting to use e.g. some Windows C compiler?

--

Tauno Voipio

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Re: Implicit int to enum [message #1796180 is a reply to message #1796166]

Mon, 08 October 2018 04:24

Marc-André Laperle

Messages: 256
Registered: July 2009

Senior Member

There is nothing like that in CDT as far as I know so the error must be coming from the compiler (as Tauno suggested) or perhaps some other plugin you have installed.

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