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This is an example of documentation generated by ZigDoc, an alternative to Zig's built-in Auto Doc feature. See also examples in other modes/formats. The project being documented here (as the example) is the Zig standard library. Public Function

round

Public Function
std.fmt.parse_float.decimal.Decimal.round
pub fn round(self: *Self) MantissaT

Params

File

fmt/parse_float/decimal.zig:110
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        pub fn round(self: *Self) MantissaT {
            if (self.num_digits == 0 or self.decimal_point < 0) {
                return 0;
            } else if (self.decimal_point > max_decimal_digits) {
                return math.maxInt(MantissaT);
            }

            const dp = @as(usize, @intCast(self.decimal_point));
            var n: MantissaT = 0;

            var i: usize = 0;
            while (i < dp) : (i += 1) {
                n *= 10;
                if (i < self.num_digits) {
                    n += @as(MantissaT, self.digits[i]);
                }
            }

            var round_up = false;
            if (dp < self.num_digits) {
                round_up = self.digits[dp] >= 5;
                if (self.digits[dp] == 5 and dp + 1 == self.num_digits) {
                    round_up = self.truncated or ((dp != 0) and (1 & self.digits[dp - 1] != 0));
                }
            }
            if (round_up) {
                n += 1;
            }
            return n;
        }