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docs: clarify mapped-byte helper compatibility #34

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antono3 merged 1 commit into from
Nov 6, 2026
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docs: clarify mapped-byte helper compatibility #34

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5 changes: 3 additions & 2 deletions examples/buffer_suballocation/mapped_bytes.v
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Original file line number Diff line number Diff line change
@@ -1,7 +1,8 @@
module main

// Pass the pointer value into a fresh local scope: vlang/v#31481 otherwise
// casts a heap-promoted voidptr slot's address instead of its stored value.
// Keep this helper for compatibility with older V3 compilers (vlang/v#31481).
// Passing the pointer value into a fresh scope prevents a heap-promoted
// pointer slot from being used as the byte-store destination.
fn store_mapped_byte(mapped voidptr, value u8) {
unsafe {
*(&u8(mapped)) = value
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