zig/test/incremental/change_panic_handler
mlugg 83991efe10
compiler: yet more panic handler changes
* `std.builtin.Panic` -> `std.builtin.panic`, because it is a namespace.
* `root.Panic` -> `root.panic` for the same reason. There are type
  checks so that we still allow the legacy `pub fn panic` strategy in
  the 0.14.0 release.
* `std.debug.SimplePanic` -> `std.debug.simple_panic`, same reason.
* `std.debug.NoPanic` -> `std.debug.no_panic`, same reason.
* `std.debug.FormattedPanic` is now a function `std.debug.FullPanic`
  which takes as input a `panicFn` and returns a namespace with all the
  panic functions. This handles the incredibly common case of just
  wanting to override how the message is printed, whilst keeping nice
  formatted panics.
* Remove `std.builtin.panic.messages`; now, every safety panic has its
  own function. This reduces binary bloat, as calls to these functions
  no longer need to prepare any arguments (aside from the error return
  trace).
* Remove some legacy declarations, since a zig1.wasm update has
  happened. Most of these were related to the panic handler, but a quick
  grep for "zig1" brought up a couple more results too.

Also, add some missing type checks to Sema.

Resolves: #22584

formatted -> full
2025-01-24 19:29:51 +00:00

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#target=x86_64-linux-selfhosted
#target=x86_64-linux-cbe
#target=x86_64-windows-cbe
#update=initial version
#file=main.zig
pub fn main() !u8 {
var a: u8 = undefined;
a = 255;
_ = a + 1;
return 1;
}
pub const panic = std.debug.FullPanic(myPanic);
fn myPanic(msg: []const u8, _: ?*std.builtin.StackTrace, _: ?usize) noreturn {
std.io.getStdOut().writer().print("panic message: {s}\n", .{msg}) catch {};
std.process.exit(0);
}
const std = @import("std");
#expect_stdout="panic message: integer overflow\n"
#update=change the panic handler body
#file=main.zig
pub fn main() !u8 {
var a: u8 = undefined;
a = 255;
_ = a + 1;
return 1;
}
pub const panic = std.debug.FullPanic(myPanic);
fn myPanic(msg: []const u8, _: ?*std.builtin.StackTrace, _: ?usize) noreturn {
std.io.getStdOut().writer().print("new panic message: {s}\n", .{msg}) catch {};
std.process.exit(0);
}
const std = @import("std");
#expect_stdout="new panic message: integer overflow\n"
#update=change the panic handler function value
#file=main.zig
pub fn main() !u8 {
var a: u8 = undefined;
a = 255;
_ = a + 1;
return 1;
}
pub const panic = std.debug.FullPanic(myPanicNew);
fn myPanicNew(msg: []const u8, _: ?*std.builtin.StackTrace, _: ?usize) noreturn {
std.io.getStdOut().writer().print("third panic message: {s}\n", .{msg}) catch {};
std.process.exit(0);
}
const std = @import("std");
#expect_stdout="third panic message: integer overflow\n"