Class: Vinter::Lexer

Inherits:
Object
  • Object
show all
Defined in:
lib/vinter/lexer.rb

Constant Summary collapse

BUILTINS = 
[
  "abs(",
  "acos(",
  "add(",
  "and(",
  "append(",
  "appendbufline(",
  "argc(",
  "argidx(",
  "arglistid(",
  "argv(",
  "argv(",
  "asin(",
  "assert_beeps(",
  "assert_equal(",
  "assert_equalfile(",
  "assert_exception(",
  "assert_fails(",
  "assert_false(",
  "assert_inrange(",
  "assert_match(",
  "assert_nobeep(",
  "assert_notequal(",
  "assert_notmatch(",
  "assert_report(",
  "assert_true(",
  "atan(",
  "atan2(",
  "autocmd_add(",
  "autocmd_delete(",
  "autocmd_get(",
  "balloon_gettext(",
  "balloon_show(",
  "balloon_split(",
  "bindtextdomain(",
  "blob2list(",
  "browse(",
  "browsedir(",
  "bufadd(",
  "bufexists(",
  "buflisted(",
  "bufload(",
  "bufloaded(",
  "bufname(",
  "bufnr(",
  "bufwinid(",
  "bufwinnr(",
  "byte2line(",
  "byteidx(",
  "byteidxcomp(",
  "call(",
  "ceil(",
  "ch_canread(",
  "ch_close(",
  "ch_close_in(",
  "ch_evalexpr(",
  "ch_evalraw(",
  "ch_getbufnr(",
  "ch_getjob(",
  "ch_info(",
  "ch_log(",
  "ch_logfile(",
  "ch_open(",
  "ch_read(",
  "ch_readblob(",
  "ch_readraw(",
  "ch_sendexpr(",
  "ch_sendraw(",
  "ch_setoptions(",
  "ch_status(",
  "changenr(",
  "char2nr(",
  "charclass(",
  "charcol(",
  "charidx(",
  "chdir(",
  "cindent(",
  "clearmatches(",
  "col(",
  "complete(",
  "complete_add(",
  "complete_check(",
  "complete_info(",
  "confirm(",
  "copy(",
  "cos(",
  "cosh(",
  "count(",
  "cscope_connection(",
  "cursor(",
  "cursor(",
  "debugbreak(",
  "deepcopy(",
  "delete(",
  "deletebufline(",
  "did_filetype(",
  "diff(",
  "diff_filler(",
  "diff_hlID(",
  "digraph_get(",
  "digraph_getlist(",
  "digraph_set(",
  "digraph_setlist(",
  "echoraw(",
  "empty(",
  "environ(",
  "err_teapot(",
  "escape(",
  "eval(",
  "eventhandler(",
  "executable(",
  "execute(",
  "exepath(",
  "exists(",
  "exists_compiled(",
  "exp(",
  "expand(",
  "expandcmd(",
  "extend(",
  "extendnew(",
  "feedkeys(",
  "filecopy(",
  "filereadable(",
  "filewritable(",
  "filter(",
  "finddir(",
  "findfile(",
  "flatten(",
  "flattennew(",
  "float2nr(",
  "floor(",
  "fmod(",
  "fnameescape(",
  "fnamemodify(",
  "foldclosed(",
  "foldclosedend(",
  "foldlevel(",
  "foldtext(",
  "foldtextresult(",
  "foreach(",
  "foreground(",
  "fullcommand(",
  "funcref(",
  "function(",
  "garbagecollect(",
  "get(",
  "get(",
  "get(",
  "getbufinfo(",
  "getbufline(",
  "getbufoneline(",
  "getbufvar(",
  "getcellwidths(",
  "getchangelist(",
  "getchar(",
  "getcharmod(",
  "getcharpos(",
  "getcharsearch(",
  "getcharstr(",
  "getcmdcompltype(",
  "getcmdline(",
  "getcmdpos(",
  "getcmdscreenpos(",
  "getcmdtype(",
  "getcmdwintype(",
  "getcompletion(",
  "getcurpos(",
  "getcursorcharpos(",
  "getcwd(",
  "getenv(",
  "getfontname(",
  "getfperm(",
  "getfsize(",
  "getftime(",
  "getftype(",
  "getimstatus(",
  "getjumplist(",
  "getline(",
  "getline(",
  "getloclist(",
  "getloclist(",
  "getmarklist(",
  "getmatches(",
  "getmousepos(",
  "getmouseshape(",
  "getpid(",
  "getpos(",
  "getqflist(",
  "getqflist(",
  "getreg(",
  "getreginfo(",
  "getregion(",
  "getregionpos(",
  "getregtype(",
  "getscriptinfo(",
  "gettabinfo(",
  "gettabvar(",
  "gettabwinvar(",
  "gettagstack(",
  "gettext(",
  "getwininfo(",
  "getwinpos(",
  "getwinposx(",
  "getwinposy(",
  "getwinvar(",
  "glob(",
  "glob2regpat(",
  "globpath(",
  "has(",
  "has_key(",
  "haslocaldir(",
  "hasmapto(",
  "histadd(",
  "histdel(",
  "histget(",
  "histnr(",
  "hlID(",
  "hlexists(",
  "hlget(",
  "hlset(",
  "hostname(",
  "iconv(",
  "id(",
  "indent(",
  "index(",
  "indexof(",
  "input(",
  "inputdialog(",
  "inputlist(",
  "inputrestore(",
  "inputsave(",
  "inputsecret(",
  "insert(",
  "instanceof(",
  "interrupt(",
  "invert(",
  "isabsolutepath(",
  "isdirectory(",
  "isinf(",
  "islocked(",
  "isnan(",
  "items(",
  "job_getchannel(",
  "job_info(",
  "job_setoptions(",
  "job_start(",
  "job_status(",
  "job_stop(",
  "join(",
  "js_decode(",
  "js_encode(",
  "json_decode(",
  "json_encode(",
  "keys(",
  "keytrans(",
  "len(",
  "libcall(",
  "libcallnr(",
  "line(",
  "line2byte(",
  "lispindent(",
  "list2blob(",
  "list2str(",
  "listener_add(",
  "listener_flush(",
  "listener_remove(",
  "localtime(",
  "log(",
  "log10(",
  "luaeval(",
  "map(",
  "maparg(",
  "mapcheck(",
  "maplist(",
  "mapnew(",
  "mapset(",
  "match(",
  "matchadd(",
  "matchaddpos(",
  "matcharg(",
  "matchbufline(",
  "matchdelete(",
  "matchend(",
  "matchfuzzy(",
  "matchfuzzypos(",
  "matchlist(",
  "matchstr(",
  "matchstrlist(",
  "matchstrpos(",
  "max(",
  "menu_info(",
  "min(",
  "mkdir(",
  "mode(",
  "mzeval(",
  "nextnonblank(",
  "nr2char(",
  "or(",
  "pathshorten(",
  "perleval(",
  "popup_atcursor(",
  "popup_beval(",
  "popup_clear(",
  "popup_close(",
  "popup_create(",
  "popup_dialog(",
  "popup_filter_menu(",
  "popup_filter_yesno(",
  "popup_findecho(",
  "popup_findinfo(",
  "popup_findpreview(",
  "popup_getoptions(",
  "popup_getpos(",
  "popup_hide(",
  "popup_list(",
  "popup_locate(",
  "popup_menu(",
  "popup_move(",
  "popup_notification(",
  "popup_setbuf(",
  "popup_setoptions(",
  "popup_settext(",
  "popup_show(",
  "pow(",
  "prevnonblank(",
  "printf(",
  "prompt_getprompt(",
  "prompt_setcallback(",
  "prompt_setinterrupt(",
  "prompt_setprompt(",
  "prop_add(",
  "prop_add_list(",
  "prop_clear(",
  "prop_find(",
  "prop_list(",
  "prop_remove(",
  "prop_type_add(",
  "prop_type_change(",
  "prop_type_delete(",
  "prop_type_get(",
  "prop_type_list(",
  "pum_getpos(",
  "pumvisible(",
  "py3eval(",
  "pyeval(",
  "pyxeval(",
  "rand(",
  "range(",
  "readblob(",
  "readdir(",
  "readdirex(",
  "readfile(",
  "reduce(",
  "reg_executing(",
  "reg_recording(",
  "reltime(",
  "reltimefloat(",
  "reltimestr(",
  "remote_expr(",
  "remote_foreground(",
  "remote_peek(",
  "remote_read(",
  "remote_send(",
  "remote_startserver(",
  "remove(",
  "remove(",
  "remove(",
  "rename(",
  "repeat(",
  "resolve(",
  "reverse(",
  "round(",
  "rubyeval(",
  "screenattr(",
  "screenchar(",
  "screenchars(",
  "screencol(",
  "screenpos(",
  "screenrow(",
  "screenstring(",
  "search(",
  "searchcount(",
  "searchdecl(",
  "searchpair(",
  "searchpairpos(",
  "searchpos(",
  "server2client(",
  "serverlist(",
  "setbufline(",
  "setbufvar(",
  "setcellwidths(",
  "setcharpos(",
  "setcharsearch(",
  "setcmdline(",
  "setcmdpos(",
  "setcursorcharpos(",
  "setenv(",
  "setfperm(",
  "setline(",
  "setloclist(",
  "setloclist(",
  "setmatches(",
  "setpos(",
  "setqflist(",
  "setqflist(",
  "setreg(",
  "settabvar(",
  "settabwinvar(",
  "settagstack(",
  "setwinvar(",
  "sha256(",
  "shellescape(",
  "shiftwidth(",
  "showdefinition(",
  "sign_define(",
  "sign_define(",
  "sign_getdefined(",
  "sign_getplaced(",
  "sign_jump(",
  "sign_place(",
  "sign_placelist(",
  "sign_undefine(",
  "sign_undefine(",
  "sign_unplace(",
  "sign_unplacelist(",
  "simplify(",
  "sin(",
  "sinh(",
  "slice(",
  "sort(",
  "sound_clear(",
  "sound_playevent(",
  "sound_playfile(",
  "sound_stop(",
  "soundfold(",
  "spellbadword(",
  "spellsuggest(",
  "split(",
  "sqrt(",
  "srand(",
  "state(",
  "str2float(",
  "str2list(",
  "str2nr(",
  "strcharlen(",
  "strcharpart(",
  "strchars(",
  "strdisplaywidth(",
  "strftime(",
  "strgetchar(",
  "stridx(",
  "string(",
  "strlen(",
  "strpart(",
  "strptime(",
  "strridx(",
  "strtrans(",
  "strutf16len(",
  "strwidth(",
  "submatch(",
  "substitute(",
  "swapfilelist(",
  "swapinfo(",
  "swapname(",
  "synID(",
  "synIDattr(",
  "synIDtrans(",
  "synconcealed(",
  "synstack(",
  "system(",
  "systemlist(",
  "tabpagebuflist(",
  "tabpagenr(",
  "tabpagewinnr(",
  "tagfiles(",
  "taglist(",
  "tan(",
  "tanh(",
  "tempname(",
  "term_dumpdiff(",
  "term_dumpload(",
  "term_dumpwrite(",
  "term_getaltscreen(",
  "term_getansicolors(",
  "term_getattr(",
  "term_getcursor(",
  "term_getjob(",
  "term_getline(",
  "term_getscrolled(",
  "term_getsize(",
  "term_getstatus(",
  "term_gettitle(",
  "term_gettty(",
  "term_list(",
  "term_scrape(",
  "term_sendkeys(",
  "term_setansicolors(",
  "term_setapi(",
  "term_setkill(",
  "term_setrestore(",
  "term_setsize(",
  "term_start(",
  "term_wait(",
  "terminalprops(",
  "test_alloc_fail(",
  "test_autochdir(",
  "test_feedinput(",
  "test_garbagecollect_now(",
  "test_garbagecollect_soon(",
  "test_getvalue(",
  "test_gui_event(",
  "test_ignore_error(",
  "test_mswin_event(",
  "test_null_blob(",
  "test_null_channel(",
  "test_null_dict(",
  "test_null_function(",
  "test_null_job(",
  "test_null_list(",
  "test_null_partial(",
  "test_null_string(",
  "test_option_not_set(",
  "test_override(",
  "test_refcount(",
  "test_setmouse(",
  "test_settime(",
  "test_srand_seed(",
  "test_unknown(",
  "test_void(",
  "timer_info(",
  "timer_pause(",
  "timer_start(",
  "timer_stop(",
  "timer_stopall(",
  "tolower(",
  "toupper(",
  "tr(",
  "trim(",
  "trunc(",
  "type(",
  "typename(",
  "undofile(",
  "undotree(",
  "uniq(",
  "utf16idx(",
  "values(",
  "virtcol(",
  "virtcol2col(",
  "visualmode(",
  "wildmenumode(",
  "win_execute(",
  "win_findbuf(",
  "win_getid(",
  "win_gettype(",
  "win_gotoid(",
  "win_id2tabwin(",
  "win_id2win(",
  "win_move_separator(",
  "win_move_statusline(",
  "win_screenpos(",
  "win_splitmove(",
  "winbufnr(",
  "wincol(",
  "windowsversion(",
  "winheight(",
  "winlayout(",
  "winline(",
  "winnr(",
  "winrestcmd(",
  "winrestview(",
  "winsaveview(",
  "winwidth(",
  "wordcount(",
  "writefile(",
  "xor("
]
TOKEN_TYPES = 
{
  # Vim9 specific keywords

  keyword: /\b(if|else|elseif|endif|while|endwhile|for|endfor|def|enddef|function|endfunction|endfunc|return|const|var|final|import|export|class|extends|static|enum|vim9script|scriptencoding|abort|autocmd|echom|echoerr|echohl|echomsg|let|unlet|continue|break|try|catch|finally|endtry|throw|runtime|silent|delete|command|call|set|setlocal|syntax|sleep|source|nnoremap|nmap|inoremap|imap|vnoremap|vmap|xnoremap|xmap|cnoremap|cmap|noremap|var)\b/,
  encodings: /\b(latin1|iso|koi8|macroman|cp437|cp737|cp775|cp850|cp852|cp855|cp857|cp860|cp861|cp862|cp863|cp865|cp866|cp869|cp874|cp1250|cp1251|cp1253|cp1254|cp1255|cp1256|cp1257|cp1258|cp932|euc\-jp|sjis|cp949|euc\-kr|cp936|euc\-cn|cp950|big5|euc\-tw|utf\-8|ucs\-2|ucs\-21e|utf\-16|utf\-16le|ucs\-4|ucs\-4le|ansi|japan|korea|prc|chinese|taiwan|utf8|unicode|ucs2be|ucs\-2be|ucs\-4be|utf\-32|utf\-32le)\b/,
  #builtin_funcs: /\b(highlight||normal!|normal|filter|match|extend|redraw!|setbufline)\b/,

  type: /\b(number|list|dict|void|string)\b/,
  builtin_funcs: /\b(#{Regexp.union(BUILTINS).source})\b/,
  # Identifiers can include # and special characters

  heredoc: /=<</,
  # Single-character operators

  operator: /[\+\-\*\/=%<>!&\|\.]/,
  # Multi-character operators handled separately

  number: /\b(0[xX][0-9A-Fa-f]+|0[oO][0-7]+|0[bB][01]+|\d+(\.\d+)?([eE][+-]?\d+)?[smh]?)\b/,
  # Handle both single and double quoted strings

  # string: /"(\\"|[^"])*"|'(\\'|[^'])*'/,

  register_access: /@[a-zA-Z0-9":.%#=*+~_\/\-]/,
  identifier: /\b[a-zA-Z_][a-zA-Z0-9_#]*/,
  # Vim9 comments use #

  comment: /^(?: (?! g:).)*#.*/,
  whitespace: /\s+/,
  brace_open: /\{/,
  brace_close: /\}/,
  paren_open: /\(/,
  paren_close: /\)/,
  bracket_open: /\[/,
  bracket_close: /\]/,
  colon: /:/,
  semicolon: /;/,
  comma: /,/,
  backslash: /\\/,
  question_mark: /\?/,
  command_separator: /\|/,
}
CONTINUATION_OPERATORS = 
%w(. .. + - * / = == ==# ==? != > < >= <= && || ? : -> =>)

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ Lexer

Returns a new instance of Lexer.



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# File 'lib/vinter/lexer.rb', line 614

def initialize(input)
  @input = input
  @tokens = []
  @position = 0
  @line_num = 1
  @column = 1
end

Instance Method Details

#find_unescaped_newline(chunk) ⇒ Object 



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# File 'lib/vinter/lexer.rb', line 643

def find_unescaped_newline(chunk)
  i = 0
  while i < chunk.length
    if chunk[i] == "\n" && (i == 0 || chunk[i - 1] != '\\')
      return i
    end
    i += 1
  end
  nil # Return nil if no unescaped newline is found

end

#should_parse_as_regex ⇒ Object 



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# File 'lib/vinter/lexer.rb', line 622

def should_parse_as_regex
  # Look at recent tokens to determine if we're in a regex context

  recent_tokens = @tokens.last(3)

  # Check for contexts where regex is expected

  return true if recent_tokens.any? { |t|
    t && t[:type] == :keyword && ['syntax'].include?(t[:value])
  }

  return true if recent_tokens.any? { |t|
    t && t[:type] == :identifier && ['region', 'keyword'].include?(t[:value])
  }

  # Check for comparison operators that often use regex

  return true if recent_tokens.any? { |t|
    t && t[:type] == :operator && ['=~', '!~', '=~#', '!~#', '=~?', '!~?'].include?(t[:value])
  }

  false
end

#tokenize ⇒ Object 



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# File 'lib/vinter/lexer.rb', line 654

def tokenize
  until @position >= @input.length
    chunk = @input[@position..-1]

    # First check if the line starts with a quote (comment in Vim)

    # Check if we're at the beginning of a line (optionally after whitespace)

    line_start = @position == 0 || @input[@position - 1] == "\n"
    if !line_start
      # Check if we're after whitespace at the start of a line

      temp_pos = @position - 1
      while temp_pos >= 0 && @input[temp_pos] =~ /[ \t]/
        temp_pos -= 1
      end
      line_start = temp_pos < 0 || @input[temp_pos] == "\n"
    end

    # If we're at the start of a line and it begins with a quote

    #if line_start && chunk.start_with?('"')

      ## Find the end of the line

      #line_end = find_unescaped_newline(chunk) || chunk.length

      #comment_text = chunk[0...line_end]


      #@tokens << {

        #type: :comment,

        #value: comment_text,

        #line: @line_num,

        #column: @column

      #}


      #@position += comment_text.length

      #@column += comment_text.length

      #next

    #end


    # --- Interpolated String Handling ---

    if chunk.start_with?("$'")
      i = 2
      string_value = "$'"
      brace_depth = 0
      escaped = false

      while i < chunk.length
        char = chunk[i]
        string_value += char

        if char == '\\' && !escaped
          escaped = true
        elsif char == "'" && !escaped && brace_depth == 0
          # End of interpolated string

          i += 1
          break
        elsif char == '{' && !escaped
          brace_depth += 1
        elsif char == '}' && !escaped && brace_depth > 0
          brace_depth -= 1
        elsif escaped
          escaped = false
        end

        i += 1
      end

      @tokens << {
        type: :interpolated_string,
        value: string_value,
        line: @line_num,
        column: @column
      }
      @column += string_value.length
      @position += string_value.length
      @line_num += string_value.count("\n")
      next
    end

    # XXX: i dont like this not being combined with $' condition above

    if chunk.start_with?('$"')
      i = 2
      string_value = '$"'
      brace_depth = 0
      escaped = false

      while i < chunk.length
        char = chunk[i]
        string_value += char

        if char == '\\' && !escaped
          escaped = true
        elsif char == '"' && !escaped && brace_depth == 0
          # End of interpolated string

          i += 1
          break
        elsif char == '{' && !escaped
          brace_depth += 1
        elsif char == '}' && !escaped && brace_depth > 0
          brace_depth -= 1
        elsif escaped
          escaped = false
        end

        i += 1
      end

      @tokens << {
        type: :interpolated_string,
        value: string_value,
        line: @line_num,
        column: @column
      }
      @column += string_value.length
      @position += string_value.length
      @line_num += string_value.count("\n")
      next
    end

    # Handle string literals manually

    if chunk.start_with?("'") || chunk.start_with?('"')
      quote = chunk[0]
      i = 1
      string_value = quote

      # Keep going until we find an unescaped closing quote

      while i < chunk.length
        char = chunk[i]
        next_char = chunk[i + 1] if i + 1 < chunk.length

        string_value += char

        if char == quote && next_char == quote
          # Handle escaped single quote ('') or double quote ("")

          string_value += next_char
          i += 1
        elsif char == quote
          # End of string

          i += 1
          break
        end

        i += 1
      end

      # Add the string token if we found a closing quote

      @tokens << {
        type: :string,
        value: string_value,
        line: @line_num,
        column: @column
      }

      @column += string_value.length
      @position += string_value.length
      @line_num += string_value.count("\n")
      next
    end

    # Add special handling for command options in the tokenize method

    if chunk.start_with?('<q-args>', '<f-args>', '<args>')
      arg_token = chunk.match(/\A(<q-args>|<f-args>|<args>)/)[0]
      @tokens << {
        type: :command_arg_placeholder,
        value: arg_token,
        line: @line_num,
        column: @column
      }
      @column += arg_token.length
      @position += arg_token.length
      next
    end

    # Special handling for a:000 variable arguments array

    if chunk =~ /\Aa:0+/
      varargs_token = chunk.match(/\Aa:0+/)[0]
      @tokens << {
        type: :arg_variable,
        value: varargs_token,
        line: @line_num,
        column: @column
      }
      @column += varargs_token.length
      @position += varargs_token.length
      next
    end

    # Also add special handling for 'silent!' keyword

    # Add this after the keyword check in tokenize method

    if chunk.start_with?('silent!')
      @tokens << {
        type: :silent_bang,
        value: 'silent!',
        line: @line_num,
        column: @column
      }
      @column += 7
      @position += 7
      next
    end

    # Check for keywords first, before other token types

    if match = chunk.match(/\A\b(if|else|elseif|endif|while|endwhile|for|endfor|def|enddef|function|endfunction|endfunc|return|const|var|final|import|export|class|extends|static|enum|vim9script|abort|autocmd|echoerr|echohl|echomsg|let|unlet|var|setlocal|syntax|highlight|sleep|source)\b/)
      @tokens << {
        type: :keyword,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle Vim scoped option variables with &l: or &g: prefix

    if match = chunk.match(/\A&[lg]:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :scoped_option_variable,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle Vim option variables with & prefix

    if match = chunk.match(/\A&[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :option_variable,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle Vim special variables with v: prefix

    if match = chunk.match(/\Av:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :special_variable,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle script-local identifiers with s: prefix

    if match = chunk.match(/\As:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :script_local,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle buffer-local identifiers with b: prefix

    if match = chunk.match(/\Ab:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :buffer_local,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle window-local identifiers with w: prefix

    if match = chunk.match(/\Aw:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :window_local,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle tab-local identifiers with t: prefix

    if match = chunk.match(/\At:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :tab_local,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end


    # Handle global variables with g: prefix

    if match = chunk.match(/\Ag:[a-zA-Z_][\w#]*/)
      @tokens << {
        type: :global_variable,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle argument variables with a: prefix

    if match = chunk.match(/\Aa:[a-zA-Z_][a-zA-Z0-9_]*/) || match = chunk.match(/\Aa:[A-Z0-9]/)
      @tokens << {
        type: :arg_variable,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle argument variables with a: prefix

    if match = chunk.match(/\Al:[a-zA-Z_][a-zA-Z0-9_]*/)
      @tokens << {
        type: :local_variable,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Add support for standalone namespace prefixes (like g:)

    if match = chunk.match(/\A([gbwt]):/)
      @tokens << {
        type: :namespace_prefix,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle compound assignment operators

    if match = chunk.match(/\A(\+=|-=|\*=|\/=|\.\.=|\.=)/)
      @tokens << {
        type: :compound_operator,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle ellipsis for variable args

    if chunk.start_with?('...')
      @tokens << {
        type: :ellipsis,
        value: '...',
        line: @line_num,
        column: @column
      }
      @column += 3
      @position += 3
      next
    end

    # Handle multi-character operators explicitly

    if match = chunk.match(/\A(=~#|=~\?|=~|!~#|!~\?|!~|==#|==\?|==|!=#|!=\?|!=|=>\?|=>|>=#|>=\?|>=|<=#|<=\?|<=|->#|->\?|->|\.\.|\|\||&&)/)
      @tokens << {
        type: :operator,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle regex patterns /pattern/ - only in specific contexts

    if chunk.start_with?('/') && should_parse_as_regex
      i = 1
      regex_value = '/'

      # Keep going until we find the closing slash

      while i < chunk.length
        char = chunk[i]
        regex_value += char

        if char == '/' && (i == 1 || chunk[i-1] != '\\')
          # Found closing slash

          i += 1
          break
        end

        i += 1
      end

      # Add the regex token if we found a closing slash

      if regex_value.end_with?('/')
        @tokens << {
          type: :regex,
          value: regex_value,
          line: @line_num,
          column: @column
        }
        @column += regex_value.length
        @position += regex_value.length
        next
      end
    end

    # Handle hex colors like #33FF33

    if match = chunk.match(/\A#[0-9A-Fa-f]{6}/)
      @tokens << {
        type: :hex_color,
        value: match[0],
        line: @line_num,
        column: @column
      }
      @column += match[0].length
      @position += match[0].length
      next
    end

    # Handle register access (@a, @", etc.)

    if chunk =~ /\A@[a-zA-Z0-9":.%#=*+~_\/\-]/
      register_token = chunk.match(/\A@[a-zA-Z0-9":.%#=*+~_\/\-]/)[0]
      @tokens << {
        type: :register_access,
        value: register_token,
        line: @line_num,
        column: @column
      }
      @column += register_token.length
      @position += register_token.length
      next
    end

    # In the tokenize method, add special handling for common mapping components

    if chunk.start_with?('<CR>', '<Esc>', '<Tab>', '<Space>', '<C-')
      # Extract the special key notation

      match = chunk.match(/\A(<[^>]+>)/)
      if match
        special_key = match[1]
        @tokens << {
          type: :special_key,
          value: special_key,
          line: @line_num,
          column: @column
        }
        @position += special_key.length
        @column += special_key.length
        next
      end
    end

    # Skip whitespace but track position

    if match = chunk.match(/\A(\s+)/)
      whitespace = match[0]
      whitespace.each_char do |c|
        if c == "\n"
          @line_num += 1
          @column = 1
        else
          @column += 1
        end
      end
      @position += whitespace.length
      next
    end

    # Handle backslash for line continuation

    if chunk.start_with?('\\')
      @tokens << {
        type: :line_continuation,
        value: '\\',
        line: @line_num,
        column: @column
      }
      @column += 1
      @position += 1

      # If followed by a newline, advance to the next line

      if @position < @input.length && @input[@position] == "\n"
        @line_num += 1
        @column = 1
        @position += 1
      end

      # Skip whitespace after the continuation

      while @position < @input.length && @input[@position] =~ /\s/
        if @input[@position] == "\n"
          @line_num += 1
          @column = 1
        else
          @column += 1
        end
        @position += 1
      end

      next
    end

    # Check for special case where 'function' is followed by '('

    # which likely means it's used as a built-in function

    if chunk =~ /\Afunction\s*\(/
      @tokens << {
        type: :identifier,  # Treat as identifier, not keyword

        value: 'function',
        line: @line_num,
        column: @column
      }
      @column += 'function'.length
      @position += 'function'.length
      next
    end

    match_found = false

    TOKEN_TYPES.each do |type, pattern|
      if match = chunk.match(/\A(#{pattern})/)
        value = match[0]
        token = {
          type: type,
          value: value,
          line: @line_num,
          column: @column
        }
        @tokens << token unless type == :whitespace

        # Update position

        if value.include?("\n")
          lines = value.split("\n")
          @line_num += lines.size - 1
          if lines.size > 1
            @column = lines.last.length + 1
          else
            @column += value.length
          end
        else
          @column += value.length
        end

        @position += value.length
        match_found = true
        break
      end
    end

    unless match_found
      # Try to handle unknown characters

      @tokens << {
        type: :unknown,
        value: chunk[0],
        line: @line_num,
        column: @column
      }

      if chunk[0] == "\n"
        @line_num += 1
        @column = 1
      else
        @column += 1
      end

      @position += 1
    end
  end

  @tokens
end