Re:Fun with C++26 reflection: Keyword Arguments
by NL807 on Tuesday February 11, 2025 @12:24AM
(#43009287)
Honestly, all I ever want is to be enumerate a struct data member or an enum at compile time, and be able to get the name, type and value of each iterated member. That's it. That's all I want.
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Re:Fun with C++26 reflection: Keyword Arguments
by Gibbon1 on Tuesday February 11, 2025 @01:16AM
(#43009572)
Would be happy with a enum that's a named key value.
key_enum one_two_three
{
FIRST = { .name = "first"},
SECOND = { .name = "second"},
THIRD = { .name = "third"},
LAST = { .value = 255, .name = "last"},
};
Re:Fun with C++26 reflection: Keyword Arguments
by uecker on Tuesday February 11, 2025 @04:02AM
(#43010575)
What is wrong with the following? Do you want type more type safety, e.g. linking the enumeration constants to the array?
enum { FIRST, SECOND, THIRD };
struct { char *name; int value; } table[] = {
[FIRST] = { .name = "FIRST", .value = 0 },
[SECOND] = { .name = "SECOND", .value = 1 },
[THIRD] = { .name = "THIRD", .value = 3 },
};
Re:Fun with C++26 reflection: Keyword Arguments
by gpderetta on Tuesday February 11, 2025 @06:18AM
(#43011518)
You still need generic code to link the enum type to its format string, for example for use in std::format or std::ostream.
Nothing really difficult, normally all of this is done by hand, which is tedious and error prone, or incorporated in a macro. It would just be nice if there was a standard provided turn-key solution to the problem.