lexlua: Fixed incorrect grammar building for lexers that embed themselves.

When there is no initial '*_whitespace' style, child lexers should prefer their
parent's grammar rather than their own.

1 files changed, 2 insertions, 1 deletions

diff --git a/lexlua/lexer.lua b/lexlua/lexer.lua
index 8b8afe548..68183aa29 100644
--- a/lexlua/lexer.lua
+++ b/lexlua/lexer.lua
@@ -1245,7 +1245,8 @@ function M.lex(lexer, text, init_style)
     if lexer._CHILDREN then
       for style, style_num in pairs(lexer._TOKENSTYLES) do
         if style_num == init_style then
-          local lexer_name = style:match('^(.+)_whitespace') or lexer._NAME
+          local lexer_name = style:match('^(.+)_whitespace') or
+            lexer._PARENTNAME or lexer._NAME
           if lexer._INITIALRULE ~= lexer_name then
             lexer:build_grammar(lexer_name)
           end