LuaLaTeX：fonts.handlers.otf.addfeature 字距调整对出现意外行为

Question

所以我尝试调整这个答案：https://tex.stackexchange.com/a/370469/75284到所有有问题的窄字距邻居1，并添加了第二组字距调整对，这些对指定了 之前字符的字距调整1。 之前的第一组用于指定 之后的字距调整1。

但是，在我的代码中：

– 同时拥有两个命令组会导致 PDF 中只有第二组字距调整有效（屏幕截图和 MWE）

– 删除第 2 组会导致第 1 组仍然有效，但这只是完成了一半……

我怎样才能让这两个组（即双方）1都生效？

% -*- program: lualatex  -*- 

\documentclass{article}
\usepackage{fontspec}

\defaultfontfeatures{Ligatures=TeX}

\newcommand\defkern{-200}

\directlua{fonts.handlers.otf.addfeature{
name = "ktest",
type = "kern",
data = {
  ["1"] = {% group 1: after the "1"
    ["."] = \defkern,
    ["0"] = \defkern,
    ["1"] = \defkern,
    ["2"] = \defkern,
    ["3"] = \defkern,
    ["4"] = \defkern,
    ["5"] = \defkern,
    ["6"] = \defkern,
    ["7"] = \defkern,
    ["8"] = \defkern,
    ["9"] = \defkern,
  },
  % group 2: preceeding the "1"
  ["."] = {["1"] = \defkern},
  ["0"] = {["1"] = \defkern},
  ["1"] = {["1"] = \defkern},
  ["2"] = {["1"] = \defkern},
  ["3"] = {["1"] = \defkern},
  ["4"] = {["1"] = \defkern},
  ["5"] = {["1"] = \defkern},
  ["6"] = {["1"] = \defkern},
  ["7"] = {["1"] = \defkern},
  ["8"] = {["1"] = \defkern},
  ["9"] = {["1"] = \defkern},
}
}
}

\setmainfont[RawFeature=+ktest]{Arial}

\begin{document}
\obeylines
11111
88888

% testing group 1
10 11 12 13 14 15 16 17 18 19 1. 

% testing group 2
01 11 21 31 41 51 61 71 81 91 .1 
\end{document}

Answer 1

您有两次“1”+“1”对，第二次设置会覆盖您的第一组：

\documentclass{article}
\usepackage{fontspec}

\defaultfontfeatures{Ligatures=TeX}

\def\defkern{-300}

\directlua{fonts.handlers.otf.addfeature{
name = "ktest",
type = "kern",
data = {
  ["1"] = {% group 1: after the "1"
    ["."] = \defkern, 
    ["0"] = \defkern,
    ["1"] = \defkern,
    ["2"] = \defkern,
    ["3"] = \defkern,
    ["4"] = \defkern,
    ["5"] = \defkern,
    ["6"] = \defkern,
    ["7"] = \defkern,
    ["8"] = \defkern,
    ["9"] = \defkern,
  },
  % group 2: preceeding the "1"
  ["."] = {["1"] = \defkern},
  ["0"] = {["1"] = \defkern},
%  ["1"] = {["1"] = \defkern},
  ["2"] = {["1"] = \defkern},
  ["3"] = {["1"] = \defkern},
  ["4"] = {["1"] = \defkern},
  ["5"] = {["1"] = \defkern},
  ["6"] = {["1"] = \defkern},
  ["7"] = {["1"] = \defkern},
  ["8"] = {["1"] = \defkern},
  ["9"] = {["1"] = \defkern},
}
}
}

\setmainfont[RawFeature=+ktest]{Arial}

\begin{document}
\obeylines
11111
88888



10 11 12 13 14 15 16 17 18 19 1.

% testing group 2
01 11 21 31 41 51 61 71 81 91 .1 
\end{document}