Better Lua Syntax For Vim

It's just what it says on the tin. (and a little more)

Edited from the original vim file, it adds support for 5.3 and 5.4, while removing support for 4.0 and 5.0 because literally nobody ever uses those anymore.

Options

• set g:lua_subversion to change the highlighting of the standard library
• set g:BetterLua_enable_emmylua to 0 to turn off EmmyLua comment highlighting

Changes

• Built in functions are given a different highlight group so they actually show up by default

• Added built ins from 5.3 and 5.4

• Attribute tags from 5.4 have a highlight group

  • luaAttrib
    • local x <const> = 5
    • local y <close> = setmetatable(...)
  • this one may have some unintentional consequences as it ends the highlight region with the = sign, but local x <const> is useless, but valid code. So for now, just don't make nil consts.

• Function calls have a highlight group

  • luaFuncCall

• EmmyLua style comments have their own highlight groups (all prefixed with luaEmmy)

  • luaEmmyKeyword
    • The @ directives like @param, @type
  • luaEmmyClassName
  • luaEmmyAliasName
  • luaEmmyParamName
  • luaEmmyFieldName
  • luaEmmyFieldExposure
    • public, protected, or private after a @field directive
  • luaEmmyGenericName
  • luaEmmyGenericParentName
  • luaEmmyFieldName
  • luaEmmyLang
  • luaEmmyType
    • Type names, the string in @param foo string
      • or @type string for var annotations

• Self, while not a keyword, has a highlight group

  • luaSelf

• Operator symbols are now highlighted

  • luaSymbol

• Varargs has a separate highlight group to not get highlighted as a partial concatenation operator

  • luaVarargs

TODO

• Add luajit
• Add screenshots
• Probably some testing, some proof-reading, and refactors