Function copyBackwards [src]

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.

Prototype

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

Parameters

T: typedest: []Tsource: []const T

Source

  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];
    }
}  