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authorDave Gauer <dave@ratfactor.com>2021-03-07 10:08:07 -0500
committerDave Gauer <dave@ratfactor.com>2021-03-07 10:08:07 -0500
commit0168afd25005b4a3555d2212d2a099cbad344e2b (patch)
tree18d6d4b501e70770f490fcd93a99bd63583b7f5b /exercises/54_multipointers.zig
parent6a44079c9d9527c2eb29cf9fdcf117d7d5529bb8 (diff)
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"Multi pointers" are now "many pointers"
TypeInfo.Pointer.Size says "many", so there we are!
Diffstat (limited to 'exercises/54_multipointers.zig')
-rw-r--r--exercises/54_multipointers.zig53
1 files changed, 0 insertions, 53 deletions
diff --git a/exercises/54_multipointers.zig b/exercises/54_multipointers.zig
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--- a/exercises/54_multipointers.zig
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@@ -1,53 +0,0 @@
-//
-// You can also make pointers to multiple items without using a slice.
-//
-// var foo: [4]u8 = [4]u8{ 1, 2, 3, 4 };
-// var foo_slice: []u8 = foo[0..];
-// var foo_ptr: [*]u8 = &foo;
-//
-// The difference between foo_slice and foo_ptr is that the slice has
-// a known length. The pointer doesn't. It is up to YOU to keep track
-// of the number of u8s foo_ptr points to!
-//
-const std = @import("std");
-
-pub fn main() void {
- // Take a good look at the type of the zen12 string:
- const zen12: *const [21]u8 = "Memory is a resource.";
- // It would also have been valid to coerce this to a slice:
- //
- // const zen12: []const u8 = "...";
- //
- // Now let's turn this into a "multi pointer":
- const zen_multiptr: [*]const u8 = zen12;
-
- // It's okay to access zen_multiptr just like an array or slice as
- // long as you keep track of the length yourself!
- //
- // A "string" in Zig is a pointer to an array of const u8 values
- // or a slice of const u8 values, into one, as we saw above). So,
- // we could treat a "multi pointer" of const u8 a string as long
- // as we can CONVERT IT TO A SLICE. (Hint: we do know the length!)
- //
- // Please fix this line so the print below statement can print it:
- const zen12_string: []const u8 = zen_multiptr;
-
- // Here's the moment of truth!
- std.debug.print("{s}\n", .{zen12_string});
-}
-//
-// Are all of these pointer types starting to get confusing?
-//
-// FREE ZIG POINTER CHEATSHEET! (Using u8 as the example type.)
-// +---------------+----------------------------------------------+
-// | u8 | one u8 |
-// | *u8 | pointer to one u8 |
-// | [2]u8 | two u8s |
-// | [*]u8 | pointer to unknown number of u8s |
-// | [2]const u8 | two immutable u8s |
-// | [*]const u8 | pointer to unknown number of immutable u8s |
-// | *[2]u8 | pointer to an array of 2 u8s |
-// | *const [2]u8 | pointer to an immutable array of 2 u8s |
-// | []u8 | slice of u8s |
-// | []const u8 | slice of immutable u8s |
-// +---------------+----------------------------------------------+