fix: don't overload copy of Vim char class.

tris203 · Jun 1, 2024 · a373c38 · a373c38
1 parent 4492ba9
commit a373c38
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Showing 2 changed files with 4 additions and 5 deletions.
diff --git a/lua/precognition/horizontal_motions.lua b/lua/precognition/horizontal_motions.lua
@@ -132,6 +132,10 @@ function M.prev_word_boundary(str, cursorcol, linelen, big_word)
     while utils.char_class(char, big_word) == c_class and offset >= 0 do
         offset = offset - 1
         char = vim.fn.strcharpart(str, offset - 1, 1)
+        if char == "" then
+            -- Gone outside the line boundary, so break.
+            break
+        end
         --if remaining string is whitespace, return nil_wrap
         local remaining = string.sub(str, offset)
         if remaining:match("^%s*$") and #remaining > 0 then

diff --git a/tests/precognition/char_spec.lua b/tests/precognition/char_spec.lua
@@ -63,11 +63,6 @@ describe("big_word classing", function()
         eq(utils.char_class("", false), 2)
         eq(utils.char_class("", false), 2)
     end)
-
-    it("can class the empty string", function()
-        eq(utils.char_class("", true), 3)
-        eq(utils.char_class("", false), 3)
-    end)
 end)
 
 describe("pad arrays", function()