Re: [PATCH v3 4/8] sequencer: define array with enum values

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"Derrick Stolee via GitGitGadget" <gitgitgadget@xxxxxxxxx> writes:

> From: Derrick Stolee <derrickstolee@xxxxxxxxxx>
>
> The todo_command_info array defines which strings match with which
> todo_command enum values. The array is defined in the same order as the
> enum values, but if one changed without the other, then we would have
> unexpected results.
>
> Make it easier to see changes to the enum and this array by using the
> enum values as the indices of the array.

OK.  It is a bit of shame that we cannot define this array and enum
at the same time in a single construct, but this is much safer than
the status quo.  Thanks.

>
> Signed-off-by: Derrick Stolee <derrickstolee@xxxxxxxxxx>
> ---
>  sequencer.c | 28 ++++++++++++++--------------
>  1 file changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/sequencer.c b/sequencer.c
> index 1094e146b99..2ffee79619c 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -1685,20 +1685,20 @@ static struct {
>  	char c;
>  	const char *str;
>  } todo_command_info[] = {
> -	{ 'p', "pick" },
> -	{ 0,   "revert" },
> -	{ 'e', "edit" },
> -	{ 'r', "reword" },
> -	{ 'f', "fixup" },
> -	{ 's', "squash" },
> -	{ 'x', "exec" },
> -	{ 'b', "break" },
> -	{ 'l', "label" },
> -	{ 't', "reset" },
> -	{ 'm', "merge" },
> -	{ 0,   "noop" },
> -	{ 'd', "drop" },
> -	{ 0,   NULL }
> +	[TODO_PICK] = { 'p', "pick" },
> +	[TODO_REVERT] = { 0,   "revert" },
> +	[TODO_EDIT] = { 'e', "edit" },
> +	[TODO_REWORD] = { 'r', "reword" },
> +	[TODO_FIXUP] = { 'f', "fixup" },
> +	[TODO_SQUASH] = { 's', "squash" },
> +	[TODO_EXEC] = { 'x', "exec" },
> +	[TODO_BREAK] = { 'b', "break" },
> +	[TODO_LABEL] = { 'l', "label" },
> +	[TODO_RESET] = { 't', "reset" },
> +	[TODO_MERGE] = { 'm', "merge" },
> +	[TODO_NOOP] = { 0,   "noop" },
> +	[TODO_DROP] = { 'd', "drop" },
> +	[TODO_COMMENT] = { 0,   NULL },
>  };
>  
>  static const char *command_to_string(const enum todo_command command)



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