Zig 0.17.0-dev (Split by item)

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copyBackwards

Copy all of source into dest at position 0. dest.len must be >= source.len. If the slices overlap, dest.ptr must be >= src.ptr. This function is deprecated; use @memmove instead.

mem.copyBackwards

pub fn copyBackwards(comptime T: type, dest: []T, source: []const T) void

File

lib/std/mem.zig:258

Code

pub fn copyBackwards(comptime T: type, dest: []T, source: []const T) void {
    // TODO instead of manually doing this check for the whole array
    // and turning off runtime safety, the compiler should detect loops like
    // this and automatically omit safety checks for loops
    @setRuntimeSafety(false);
    assert(dest.len >= source.len);
    var i = source.len;
    while (i > 0) {
        i -= 1;
        dest[i] = source[i];
    }
}