By allowing finishAir to handle .stack results, we simplify a lot of code in
air*** functions, which try to handle this case. Also this changes will result in optimization, if one of operands is dead after instruction its place could be reused by result.
The only downside to this change is that finishAir now can return error, though it handled by returning finishAir result, because it always needs to be final in air*** functions.
Additionally I migrated WValue{ to .{ inside CodeGen.zig.
* format: fix default character when no alignment
When no alignment is specified, the character that should be used is the
fill character that is otherwise provided, not space.
This is closer to the default that C programmers (and other languages)
use: "04x" fills with zeroes (in zig as of today x:04 fills with spaces)
Test:
const std = @import("std");
const expectFmt = std.testing.expectFmt;
test "fmt.defaultchar.no-alignment" {
// as of today the following test passes:
try expectFmt("0x00ff", "0x{x:0>4}", .{255});
// as of today the following test fails (returns "0x ff" instead)
try expectFmt("0x00ff", "0x{x:04}", .{255});
}
* non breaking improvement of string formatting
* improved comment
* simplify the code a little
* small improvement around how characters identified as valid are consumed
This eliminates the statically-reachable recursion loop between code
generation backends and Sema. This is beneficial for optimizers
(although I do not measure any performance improvement for this change),
and for profilers.
They are implementation-defined and can have values other than
hard-coded here. Also, standard permits other values not mentioned
there:
> Additional macro definitions, beginning with the characters LC_
> and an uppercase letter, may also be specified by the implementation.
Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
According to https://en.cppreference.com/mwiki/index.php?title=c/locale/setlocale&oldid=171500 ,
`setlocale` "returns null value on failure":
> Return value
> pointer to a narrow null-terminated string identifying the C locale
> after applying the changes, if any, or null pointer on failure.
Example program:
```zig
const std = @import("std");
pub fn main() void {
const ptr = std.c.setlocale(.ALL, "non_existent");
std.debug.print("ptr = {d}\n", .{@intFromPtr(ptr)});
}
```
Output:
```console
ptr = 0
```
Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
Instead of calling the dynamically loaded kernel32.GetLastError, we can extract it from the TEB.
As shown by [Wine](34b1606019/include/winternl.h (L439)), the last error lives at offset 0x34 of the TEB in 32-bit Windows and at offset 0x68 in 64-bit Windows.
