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Merge pull request 'added expalantion for const pointer' (#428) from pointer into main

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Reviewed-on: https://codeberg.org/ziglings/exercises/pulls/428
This commit is contained in:
Chris Boesch
2026-05-22 22:27:15 +02:00
parent 926fc04d81 1d965491c1
commit 8468040a8e
2 changed files with 18 additions and 2 deletions
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16
exercises/040_pointers2.zig
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@@ -27,3 +27,19 @@ pub fn main() void {
std.debug.print("a: {}, b: {}\n", .{ a, b.* }); std.debug.print("a: {}, b: {}\n", .{ a, b.* });
} }
//
// A look into the future:
// When you allocate memory, you store the returned address in
// a const var. The pointer itself never changes — it always
// refers to the same allocation — but you can still read and
// write the data it points to.
//
// Example:
//
// const buf = try allocator.alloc(u8, 1024);
// buf[0] = 42; // fine: the *contents* are mutable
//
// Note:
// Passing this pointer to a function is cheap: it's just an address
// copied on the stack. The caller can work with the data without
// needing to know where it came from or how it was allocated.

4
patches/patches/040_pointers2.patch
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@@ -1,5 +1,5 @@
--- exercises/040_pointers2.zig 2023-10-03 22:15:22.122241138 +0200 --- exercises/040_pointers2.zig 2026-05-22 21:57:28.601255748 +0200
+++ answers/040_pointers2.zig 2023-10-05 20:04:07.022766257 +0200 +++ answers/040_pointers2.zig 2026-05-22 21:57:27.672235943 +0200
@@ -23,7 +23,7 @@ @@ -23,7 +23,7 @@
pub fn main() void { pub fn main() void {