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const std = @import("std");
const builtin = @import("builtin");
const expect = std.testing.expect;
var pos = [2]f32{ 0.0, 0.0 };
test "store to global array" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
try expect(pos[1] == 0.0);
pos = [2]f32{ 0.0, 1.0 };
try expect(pos[1] == 1.0);
}
var vpos = @Vector(2, f32){ 0.0, 0.0 };
test "store to global vector" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
try expect(vpos[1] == 0.0);
vpos = @Vector(2, f32){ 0.0, 1.0 };
try expect(vpos[1] == 1.0);
}
test "slices pointing at the same address as global array." {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const S = struct {
const a = [_]u8{ 1, 2, 3 };
fn checkAddress(s: []const u8) !void {
for (s, 0..) |*i, j| {
try expect(i == &a[j]);
}
}
};
try S.checkAddress(&S.a);
try comptime S.checkAddress(&S.a);
}
test "global loads can affect liveness" {
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
const S = struct {
const ByRef = struct {
a: u32,
};
var global_ptr: *ByRef = undefined;
fn f() void {
global_ptr.* = .{ .a = 42 };
}
};
var x: S.ByRef = .{ .a = 1 };
S.global_ptr = &x;
const y = x;
S.f();
try std.testing.expect(y.a == 1);
}
test "global const can be self-referential" {
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const S = struct {
self: *const @This(),
x: u32,
const foo: @This() = .{ .self = &foo, .x = 123 };
};
try std.testing.expect(S.foo.x == 123);
try std.testing.expect(S.foo.self.x == 123);
try std.testing.expect(S.foo.self.self.x == 123);
try std.testing.expect(S.foo.self == &S.foo);
try std.testing.expect(S.foo.self.self == &S.foo);
}
test "global var can be self-referential" {
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const S = struct {
self: *@This(),
x: u32,
var foo: @This() = .{ .self = &foo, .x = undefined };
};
S.foo.x = 123;
try std.testing.expect(S.foo.x == 123);
try std.testing.expect(S.foo.self.x == 123);
try std.testing.expect(S.foo.self == &S.foo);
S.foo.self.x = 456;
try std.testing.expect(S.foo.x == 456);
try std.testing.expect(S.foo.self.x == 456);
try std.testing.expect(S.foo.self == &S.foo);
S.foo.self.self.x = 789;
try std.testing.expect(S.foo.x == 789);
try std.testing.expect(S.foo.self.x == 789);
try std.testing.expect(S.foo.self == &S.foo);
}
test "global const can be indirectly self-referential" {
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const S = struct {
other: *const @This(),
x: u32,
const foo: @This() = .{ .other = &bar, .x = 123 };
const bar: @This() = .{ .other = &foo, .x = 456 };
};
try std.testing.expect(S.foo.x == 123);
try std.testing.expect(S.foo.other.x == 456);
try std.testing.expect(S.foo.other.other.x == 123);
try std.testing.expect(S.foo.other.other.other.x == 456);
try std.testing.expect(S.foo.other == &S.bar);
try std.testing.expect(S.foo.other.other == &S.foo);
try std.testing.expect(S.bar.x == 456);
try std.testing.expect(S.bar.other.x == 123);
try std.testing.expect(S.bar.other.other.x == 456);
try std.testing.expect(S.bar.other.other.other.x == 123);
try std.testing.expect(S.bar.other == &S.foo);
try std.testing.expect(S.bar.other.other == &S.bar);
}
test "global var can be indirectly self-referential" {
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const S = struct {
other: *@This(),
x: u32,
var foo: @This() = .{ .other = &bar, .x = undefined };
var bar: @This() = .{ .other = &foo, .x = undefined };
};
S.foo.other.x = 123; // bar.x
S.foo.other.other.x = 456; // foo.x
try std.testing.expect(S.foo.x == 456);
try std.testing.expect(S.foo.other.x == 123);
try std.testing.expect(S.foo.other.other.x == 456);
try std.testing.expect(S.foo.other.other.other.x == 123);
try std.testing.expect(S.foo.other == &S.bar);
try std.testing.expect(S.foo.other.other == &S.foo);
S.bar.other.x = 111; // foo.x
S.bar.other.other.x = 222; // bar.x
try std.testing.expect(S.bar.x == 222);
try std.testing.expect(S.bar.other.x == 111);
try std.testing.expect(S.bar.other.other.x == 222);
try std.testing.expect(S.bar.other.other.other.x == 111);
try std.testing.expect(S.bar.other == &S.foo);
try std.testing.expect(S.bar.other.other == &S.bar);
}
pub const Callbacks = extern struct {
key_callback: *const fn (key: i32) callconv(.c) i32,
};
var callbacks: Callbacks = undefined;
var callbacks_loaded: bool = false;
test "function pointer field call on global extern struct, conditional on global" {
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
if (callbacks_loaded) {
try std.testing.expectEqual(42, callbacks.key_callback(42));
}
}
test "function pointer field call on global extern struct" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const S = struct {
fn keyCallback(key: i32) callconv(.c) i32 {
return key;
}
};
callbacks = Callbacks{ .key_callback = S.keyCallback };
try std.testing.expectEqual(42, callbacks.key_callback(42));
}
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