enum OptionalTokenIndex [src]

Index into tokens, or null.

Fields

none = std.math.maxInt(u32)

Members

fromOptional (Function)
fromToken (Function)
unwrap (Function)

Source

  pub const OptionalTokenIndex = enum(u32) {
    none = std.math.maxInt(u32),
    _,

    pub fn unwrap(oti: OptionalTokenIndex) ?TokenIndex {
        return if (oti == .none) null else @intFromEnum(oti);
    }

    pub fn fromToken(ti: TokenIndex) OptionalTokenIndex {
        return @enumFromInt(ti);
    }

    pub fn fromOptional(oti: ?TokenIndex) OptionalTokenIndex {
        return if (oti) |ti| @enumFromInt(ti) else .none;
    }
}  