On Monday, 20 December 2021 at 09:30:30 UTC, rumbu wrote:
because you cannot have statements directly in a template (the
fact that is a mixin template is irelevant), only declarations.
If you want to just insert some random code, use strings. You
can create a templated enum to store your parametrized string.
Please note how your parameter (c) becomes part of the
resulting string through concatenation (~):
```
enum add_char(char c) =
`if (stdout_index < STDOUT_BUF_LEN) {
stdout_buffer[stdout_index++] =` ~ c ~ `;
continue;
} else {
sys_write(1, stdout_buffer.ptr, cast(i32)stdout_index);
stdout_index = 0;
stdout_buffer[stdout_index++] =` ~ c ~ `;
continue;
}`;
```
and when you want the code inserted:
```
mixin(add_char!'%');
```
If you want to be sure that your string is syntactically
correct, use token strings
(https://dlang.org/spec/lex.html#token_strings)
Thanks a lot for the info. When I try to use this code, I'm
getting the following error:
```
Error: expression expected, not `%`
Error: expression expected, not `%`
```
So I suppose there is a problem with string concatenation. I
couldn't use it anyway because it is inefficient and because I'm
using betterC. Do you know any other way that I can concatenate
strings that does not depend an the Garbage Collector or the
standard library?
