diff options
Diffstat (limited to 'src/value.zig')
| -rw-r--r-- | src/value.zig | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/value.zig b/src/value.zig index f997b554a3..af5ee75737 100644 --- a/src/value.zig +++ b/src/value.zig @@ -2412,6 +2412,29 @@ pub const Value = extern union { } } + // Asserts that the provided start/end are in-bounds. + pub fn sliceArray(val: Value, arena: Allocator, start: usize, end: usize) error{OutOfMemory}!Value { + return switch (val.tag()) { + .empty_array_sentinel => if (start == 0 and end == 1) val else Value.initTag(.empty_array), + .bytes => Tag.bytes.create(arena, val.castTag(.bytes).?.data[start..end]), + .array => Tag.array.create(arena, val.castTag(.array).?.data[start..end]), + .slice => sliceArray(val.castTag(.slice).?.data.ptr, arena, start, end), + + .decl_ref => sliceArray(val.castTag(.decl_ref).?.data.val, arena, start, end), + .decl_ref_mut => sliceArray(val.castTag(.decl_ref_mut).?.data.decl.val, arena, start, end), + .elem_ptr => blk: { + const elem_ptr = val.castTag(.elem_ptr).?.data; + break :blk sliceArray(elem_ptr.array_ptr, arena, start + elem_ptr.index, end + elem_ptr.index); + }, + + .repeated, + .the_only_possible_value, + => val, + + else => unreachable, + }; + } + pub fn fieldValue(val: Value, allocator: Allocator, index: usize) error{OutOfMemory}!Value { _ = allocator; switch (val.tag()) { |