diff --git a/doc/langref.html.in b/doc/langref.html.in
index 906fbd7f71..0da6d60257 100644
--- a/doc/langref.html.in
+++ b/doc/langref.html.in
@@ -2929,9 +2929,15 @@ test "basic slices" {
// Both can be accessed with the `len` field.
var known_at_runtime_zero: usize = 0;
const slice = array[known_at_runtime_zero..array.len];
+ try expect(@TypeOf(slice) == []i32);
try expect(&slice[0] == &array[0]);
try expect(slice.len == array.len);
+ // If you slice with comptime-known start and end positions, the result is
+ // a pointer to an array, rather than a slice.
+ const array_ptr = array[0..array.len];
+ try expect(@TypeOf(array_ptr) == *[array.len]i32);
+
// Using the address-of operator on a slice gives a single-item pointer,
// while using the `ptr` field gives a many-item pointer.
try expect(@TypeOf(slice.ptr) == [*]i32);
@@ -2974,22 +2980,26 @@ test "using slices for strings" {
}
test "slice pointer" {
+ var a: []u8 = undefined;
+ try expect(@TypeOf(a) == []u8);
var array: [10]u8 = undefined;
const ptr = &array;
+ try expect(@TypeOf(ptr) == *[10]u8);
- // You can use slicing syntax to convert a pointer into a slice:
- const slice = ptr[0..5];
+ // A pointer to an array can be sliced just like an array:
+ var start: usize = 0;
+ var end: usize = 5;
+ const slice = ptr[start..end];
slice[2] = 3;
try expect(slice[2] == 3);
// The slice is mutable because we sliced a mutable pointer.
- // Furthermore, it is actually a pointer to an array, since the start
- // and end indexes were both comptime-known.
- try expect(@TypeOf(slice) == *[5]u8);
+ try expect(@TypeOf(slice) == []u8);
- // You can also slice a slice:
- const slice2 = slice[2..3];
- try expect(slice2.len == 1);
- try expect(slice2[0] == 3);
+ // Again, slicing with constant indexes will produce another pointer to an array:
+ const ptr2 = slice[2..3];
+ try expect(ptr2.len == 1);
+ try expect(ptr2[0] == 3);
+ try expect(@TypeOf(ptr2) == *[1]u8);
}
{#code_end#}
{#see_also|Pointers|for|Arrays#}