28 lines
877 B
Zig
28 lines
877 B
Zig
//
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// We were able to get a printable string out of a many-item
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// pointer by using a slice to assert a specific length.
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//
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// But can we ever GO BACK to a sentinel-terminated pointer
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// after we've "lost" the sentinel in a coercion?
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//
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// Yes, we can. Zig's @ptrCast() builtin can do this. Check out
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// the signature:
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//
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// @ptrCast(comptime DestType: type, value: anytype) DestType
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//
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// See if you can use it to solve the same many-item pointer
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// problem, but without needing a length!
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//
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const print = @import("std").debug.print;
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pub fn main() void {
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// Again, we've coerced the sentinel-terminated string to a
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// many-item pointer, which has no length or sentinel.
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const data: [*]const u8 = "Weird Data!";
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// Please cast 'data' to 'printable':
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const printable: [*:0]const u8 = @ptrCast([*:0]const u8, data);
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print("{s}\n", .{printable});
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}
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