diff options
| -rw-r--r-- | lua/vis.lua | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lua/vis.lua b/lua/vis.lua index f48451d..139f6dc 100644 --- a/lua/vis.lua +++ b/lua/vis.lua @@ -121,6 +121,20 @@ elseif not vis:module_exist('lexer') then vis:info('WARNING: could not find lexer module') else vis.lexers = require('lexer') + + --- Cache of loaded lexers + -- + -- Caching lexers causes lexer tables to be constructed once and reused + -- during each HIGHLIGHT event. Additionally it allows to modify the lexer + -- used for syntax highlighting from Lua code. + local lexers = {} + local load_lexer = vis.lexers.load + vis.lexers.load = function (name, alt_name, cache) + if cache and lexers[alt_name or name] then return lexers[alt_name or name] end + local lexer = load_lexer(name, alt_name) + if cache then lexers[alt_name or name] = lexer end + return lexer + end vis.lpeg = require('lpeg') end |