Moved packages to lib directory.

1 files changed, 1639 insertions, 0 deletions

diff --git a/lib/packages/docutils/rst.nim b/lib/packages/docutils/rst.nim
new file mode 100755
index 000000000..b22bdf6ce
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+++ b/lib/packages/docutils/rst.nim
@@ -0,0 +1,1639 @@
+#
+#
+#            Nimrod's Runtime Library
+#        (c) Copyright 2012 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+## This module implements a `reStructuredText`:idx parser. A large
+## subset is implemented. Some features of the `markdown`:idx: wiki syntax are
+## also supported.
+
+import 
+  os, strutils, rstast
+
+type
+  TRstParseOption* = enum     ## options for the RST parser 
+    roSkipPounds,             ## skip ``#`` at line beginning (documentation
+                              ## embedded in Nimrod comments)
+    roSupportSmilies,         ## make the RST parser support smilies like ``:)``
+    roSupportRawDirective,    ## support the ``raw`` directive (don't support
+                              ## it for sandboxing)
+    roSupportMarkdown         ## support additional features of markdown
+  
+  TRstParseOptions* = set[TRstParseOption]
+  
+  TMsgClass* = enum
+    mcHint = "Hint", 
+    mcWarning = "Warning", 
+    mcError = "Error"
+  
+  TMsgKind* = enum          ## the possible messages
+    meCannotOpenFile,
+    meExpected,
+    meGridTableNotImplemented,
+    meNewSectionExpected,
+    meGeneralParseError,
+    meInvalidDirective,
+    mwRedefinitionOfLabel,
+    mwUnknownSubstitution,
+    mwUnsupportedLanguage
+  
+  TMsgHandler* = proc (filename: string, line, col: int, msgKind: TMsgKind,
+                       arg: string) {.nimcall.} ## what to do in case of an error
+  TFindFileHandler* = proc (filename: string): string {.nimcall.}
+
+const
+  messages: array [TMsgKind, string] = [
+    meCannotOpenFile: "cannot open '$1'", 
+    meExpected: "'$1' expected",
+    meGridTableNotImplemented: "grid table is not implemented",
+    meNewSectionExpected: "new section expected", 
+    meGeneralParseError: "general parse error",
+    meInvalidDirective: "invalid directive: '$1'",
+    mwRedefinitionOfLabel: "redefinition of label '$1'", 
+    mwUnknownSubstitution: "unknown substitution '$1'",
+    mwUnsupportedLanguage: "language '$1' not supported"
+  ]
+
+proc rstnodeToRefname*(n: PRstNode): string
+proc addNodes*(n: PRstNode): string
+proc getFieldValue*(n: PRstNode, fieldname: string): string
+proc getArgument*(n: PRstNode): string
+
+# ----------------------------- scanner part --------------------------------
+
+const 
+  SymChars: TCharSet = {'a'..'z', 'A'..'Z', '0'..'9', '\x80'..'\xFF'}
+  SmileyStartChars: TCharSet = {':', ';', '8'}
+  Smilies = {
+    ":D": "icon_e_biggrin",
+    ":-D": "icon_e_biggrin",
+    ":)": "icon_e_smile",
+    ":-)": "icon_e_smile",
+    ";)": "icon_e_wink",
+    ";-)": "icon_e_wink",
+    ":(": "icon_e_sad",
+    ":-(": "icon_e_sad",
+    ":o": "icon_e_surprised",
+    ":-o": "icon_e_surprised",
+    ":shock:": "icon_eek",
+    ":?": "icon_e_confused",
+    ":-?": "icon_e_confused",
+    ":-/": "icon_e_confused",
+
+    "8-)": "icon_cool",
+
+    ":lol:": "icon_lol",
+    ":x": "icon_mad",
+    ":-x": "icon_mad",
+    ":P": "icon_razz",
+    ":-P": "icon_razz",
+    ":oops:": "icon_redface",
+    ":cry:": "icon_cry",
+    ":evil:": "icon_evil",
+    ":twisted:": "icon_twisted",
+    ":roll:": "icon_rolleyes",
+    ":!:": "icon_exclaim",
+
+    ":?:": "icon_question",
+    ":idea:": "icon_idea",
+    ":arrow:": "icon_arrow",
+    ":|": "icon_neutral",
+    ":-|": "icon_neutral",
+    ":mrgreen:": "icon_mrgreen",
+    ":geek:": "icon_e_geek",
+    ":ugeek:": "icon_e_ugeek"
+  }
+
+type
+  TTokType = enum 
+    tkEof, tkIndent, tkWhite, tkWord, tkAdornment, tkPunct, tkOther
+  TToken{.final.} = object    # a RST token
+    kind*: TTokType           # the type of the token
+    ival*: int                # the indentation or parsed integer value
+    symbol*: string           # the parsed symbol as string
+    line*, col*: int          # line and column of the token
+  
+  TTokenSeq = seq[TToken]
+  TLexer = object of TObject
+    buf*: cstring
+    bufpos*: int
+    line*, col*, baseIndent*: int
+    skipPounds*: bool
+
+
+proc getThing(L: var TLexer, tok: var TToken, s: TCharSet) = 
+  tok.kind = tkWord
+  tok.line = L.line
+  tok.col = L.col
+  var pos = L.bufpos
+  while True: 
+    add(tok.symbol, L.buf[pos])
+    inc(pos)
+    if L.buf[pos] notin s: break 
+  inc(L.col, pos - L.bufpos)
+  L.bufpos = pos
+
+proc getAdornment(L: var TLexer, tok: var TToken) = 
+  tok.kind = tkAdornment
+  tok.line = L.line
+  tok.col = L.col
+  var pos = L.bufpos
+  var c = L.buf[pos]
+  while True: 
+    add(tok.symbol, L.buf[pos])
+    inc(pos)
+    if L.buf[pos] != c: break 
+  inc(L.col, pos - L.bufpos)
+  L.bufpos = pos
+
+proc getIndentAux(L: var TLexer, start: int): int = 
+  var pos = start
+  var buf = L.buf                 
+  # skip the newline (but include it in the token!)
+  if buf[pos] == '\x0D': 
+    if buf[pos + 1] == '\x0A': inc(pos, 2)
+    else: inc(pos)
+  elif buf[pos] == '\x0A': 
+    inc(pos)
+  if L.skipPounds: 
+    if buf[pos] == '#': inc(pos)
+    if buf[pos] == '#': inc(pos)
+  while True: 
+    case buf[pos]
+    of ' ', '\x0B', '\x0C': 
+      inc(pos)
+      inc(result)
+    of '\x09': 
+      inc(pos)
+      result = result - (result mod 8) + 8
+    else: 
+      break                   # EndOfFile also leaves the loop
+  if buf[pos] == '\0': 
+    result = 0
+  elif (buf[pos] == '\x0A') or (buf[pos] == '\x0D'): 
+    # look at the next line for proper indentation:
+    result = getIndentAux(L, pos)
+  L.bufpos = pos              # no need to set back buf
+  
+proc getIndent(L: var TLexer, tok: var TToken) = 
+  inc(L.line)
+  tok.line = L.line
+  tok.col = 0
+  tok.kind = tkIndent         # skip the newline (but include it in the token!)
+  tok.ival = getIndentAux(L, L.bufpos)
+  L.col = tok.ival
+  tok.ival = max(tok.ival - L.baseIndent, 0)
+  tok.symbol = "\n" & repeatChar(tok.ival)
+
+proc rawGetTok(L: var TLexer, tok: var TToken) = 
+  tok.symbol = ""
+  tok.ival = 0
+  var c = L.buf[L.bufpos]
+  case c
+  of 'a'..'z', 'A'..'Z', '\x80'..'\xFF', '0'..'9': 
+    getThing(L, tok, SymChars)
+  of ' ', '\x09', '\x0B', '\x0C': 
+    getThing(L, tok, {' ', '\x09'})
+    tok.kind = tkWhite
+    if L.buf[L.bufpos] in {'\x0D', '\x0A'}: 
+      rawGetTok(L, tok)       # ignore spaces before \n
+  of '\x0D', '\x0A': 
+    getIndent(L, tok)
+  of '!', '\"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', 
+     '/', ':', ';', '<', '=', '>', '?', '@', '[', '\\', ']', '^', '_', '`', '{',
+     '|', '}', '~': 
+    getAdornment(L, tok)
+    if len(tok.symbol) <= 3: tok.kind = tkPunct
+  else: 
+    tok.line = L.line
+    tok.col = L.col
+    if c == '\0': 
+      tok.kind = tkEof
+    else: 
+      tok.kind = tkOther
+      add(tok.symbol, c)
+      inc(L.bufpos)
+      inc(L.col)
+  tok.col = max(tok.col - L.baseIndent, 0)
+
+proc getTokens(buffer: string, skipPounds: bool, tokens: var TTokenSeq) = 
+  var L: TLexer
+  var length = len(tokens)
+  L.buf = cstring(buffer)
+  L.line = 1                  # skip UTF-8 BOM
+  if (L.buf[0] == '\xEF') and (L.buf[1] == '\xBB') and (L.buf[2] == '\xBF'): 
+    inc(L.bufpos, 3)
+  L.skipPounds = skipPounds
+  if skipPounds: 
+    if L.buf[L.bufpos] == '#': inc(L.bufpos)
+    if L.buf[L.bufpos] == '#': inc(L.bufpos)
+    L.baseIndent = 0
+    while L.buf[L.bufpos] == ' ': 
+      inc(L.bufpos)
+      inc(L.baseIndent)
+  while true: 
+    inc(length)
+    setlen(tokens, length)
+    rawGetTok(L, tokens[length - 1])
+    if tokens[length - 1].kind == tkEof: break 
+  if tokens[0].kind == tkWhite: 
+    # BUGFIX
+    tokens[0].ival = len(tokens[0].symbol)
+    tokens[0].kind = tkIndent
+
+type
+  TLevelMap = array[Char, int]
+  TSubstitution{.final.} = object 
+    key*: string
+    value*: PRstNode
+
+  TSharedState {.final.} = object 
+    options: TRstParseOptions   # parsing options
+    uLevel, oLevel: int         # counters for the section levels
+    subs: seq[TSubstitution]    # substitutions
+    refs: seq[TSubstitution]    # references
+    underlineToLevel: TLevelMap # Saves for each possible title adornment
+                                # character its level in the
+                                # current document. 
+                                # This is for single underline adornments.
+    overlineToLevel: TLevelMap  # Saves for each possible title adornment 
+                                # character its level in the current
+                                # document. 
+                                # This is for over-underline adornments.
+    msgHandler: TMsgHandler     # How to handle errors.
+    findFile: TFindFileHandler  # How to find files.
+  
+  PSharedState = ref TSharedState
+  TRstParser = object of TObject
+    idx*: int
+    tok*: TTokenSeq
+    s*: PSharedState
+    indentStack*: seq[int]
+    filename*: string
+    line*, col*: int
+    hasToc*: bool
+
+  EParseError* = object of EInvalidValue
+
+proc whichMsgClass*(k: TMsgKind): TMsgClass =
+  ## returns which message class `k` belongs to.
+  case ($k)[1]
+  of 'e', 'E': result = mcError
+  of 'w', 'W': result = mcWarning
+  of 'h', 'H': result = mcHint
+  else: assert false, "msgkind does not fit naming scheme"
+  
+proc defaultMsgHandler*(filename: string, line, col: int, msgkind: TMsgKind,
+                        arg: string) {.procvar.} =
+  let mc = msgKind.whichMsgClass
+  let a = messages[msgKind] % arg
+  let message = "$1($2, $3) $4: $5" % [filename, $line, $col, $mc, a]
+  if mc == mcError: raise newException(EParseError, message)
+  else: Writeln(stdout, message)
+
+proc defaultFindFile*(filename: string): string {.procvar.} = 
+  if existsFile(filename): result = filename
+  else: result = ""
+
+proc newSharedState(options: TRstParseOptions,
+                    findFile: TFindFileHandler,
+                    msgHandler: TMsgHandler): PSharedState = 
+  new(result)
+  result.subs = @[]
+  result.refs = @[]
+  result.options = options
+  result.msgHandler = if isNil(msgHandler): defaultMsgHandler else: msgHandler
+  result.findFile = if isNil(findFile): defaultFindFile else: findFile
+  
+proc rstMessage(p: TRstParser, msgKind: TMsgKind, arg: string) = 
+  p.s.msgHandler(p.filename, p.line + p.tok[p.idx].line, 
+                             p.col + p.tok[p.idx].col, msgKind, arg)
+
+proc rstMessage(p: TRstParser, msgKind: TMsgKind, arg: string, line, col: int) = 
+  p.s.msgHandler(p.filename, p.line + line, 
+                             p.col + col, msgKind, arg)
+
+proc rstMessage(p: TRstParser, msgKind: TMsgKind) = 
+  p.s.msgHandler(p.filename, p.line + p.tok[p.idx].line, 
+                             p.col + p.tok[p.idx].col, msgKind, 
+                             p.tok[p.idx].symbol)
+
+when false:
+  proc corrupt(p: TRstParser) =
+    assert p.indentStack[0] == 0
+    for i in 1 .. high(p.indentStack): assert p.indentStack[i] < 1_000
+
+proc currInd(p: TRstParser): int = 
+  result = p.indentStack[high(p.indentStack)]
+
+proc pushInd(p: var TRstParser, ind: int) = 
+  add(p.indentStack, ind)
+
+proc popInd(p: var TRstParser) =
+  if len(p.indentStack) > 1: setlen(p.indentStack, len(p.indentStack) - 1)
+  
+proc initParser(p: var TRstParser, sharedState: PSharedState) = 
+  p.indentStack = @[0]
+  p.tok = @[]
+  p.idx = 0
+  p.filename = ""
+  p.hasToc = false
+  p.col = 0
+  p.line = 1
+  p.s = sharedState
+
+proc addNodesAux(n: PRstNode, result: var string) = 
+  if n.kind == rnLeaf: 
+    add(result, n.text)
+  else: 
+    for i in countup(0, len(n) - 1): addNodesAux(n.sons[i], result)
+  
+proc addNodes(n: PRstNode): string = 
+  result = ""
+  addNodesAux(n, result)
+
+proc rstnodeToRefnameAux(n: PRstNode, r: var string, b: var bool) = 
+  if n.kind == rnLeaf: 
+    for i in countup(0, len(n.text) - 1): 
+      case n.text[i]
+      of '0'..'9': 
+        if b: 
+          add(r, '-')
+          b = false
+        if len(r) == 0: add(r, 'Z')
+        add(r, n.text[i])
+      of 'a'..'z': 
+        if b: 
+          add(r, '-')
+          b = false
+        add(r, n.text[i])
+      of 'A'..'Z': 
+        if b: 
+          add(r, '-')
+          b = false
+        add(r, chr(ord(n.text[i]) - ord('A') + ord('a')))
+      else: 
+        if (len(r) > 0): b = true
+  else: 
+    for i in countup(0, len(n) - 1): rstnodeToRefnameAux(n.sons[i], r, b)
+  
+proc rstnodeToRefname(n: PRstNode): string = 
+  result = ""
+  var b = false
+  rstnodeToRefnameAux(n, result, b)
+
+proc findSub(p: var TRstParser, n: PRstNode): int = 
+  var key = addNodes(n)           
+  # the spec says: if no exact match, try one without case distinction:
+  for i in countup(0, high(p.s.subs)): 
+    if key == p.s.subs[i].key: 
+      return i
+  for i in countup(0, high(p.s.subs)): 
+    if cmpIgnoreStyle(key, p.s.subs[i].key) == 0: 
+      return i
+  result = -1
+
+proc setSub(p: var TRstParser, key: string, value: PRstNode) = 
+  var length = len(p.s.subs)
+  for i in countup(0, length - 1): 
+    if key == p.s.subs[i].key: 
+      p.s.subs[i].value = value
+      return 
+  setlen(p.s.subs, length + 1)
+  p.s.subs[length].key = key
+  p.s.subs[length].value = value
+
+proc setRef(p: var TRstParser, key: string, value: PRstNode) = 
+  var length = len(p.s.refs)
+  for i in countup(0, length - 1): 
+    if key == p.s.refs[i].key:
+      if p.s.refs[i].value.addNodes != value.addNodes:
+        rstMessage(p, mwRedefinitionOfLabel, key)
+
+      p.s.refs[i].value = value
+      return 
+  setlen(p.s.refs, length + 1)
+  p.s.refs[length].key = key
+  p.s.refs[length].value = value
+
+proc findRef(p: var TRstParser, key: string): PRstNode = 
+  for i in countup(0, high(p.s.refs)): 
+    if key == p.s.refs[i].key: 
+      return p.s.refs[i].value
+
+proc newLeaf(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnLeaf, p.tok[p.idx].symbol)
+
+proc getReferenceName(p: var TRstParser, endStr: string): PRstNode = 
+  var res = newRstNode(rnInner)
+  while true: 
+    case p.tok[p.idx].kind
+    of tkWord, tkOther, tkWhite: 
+      add(res, newLeaf(p))
+    of tkPunct: 
+      if p.tok[p.idx].symbol == endStr: 
+        inc(p.idx)
+        break 
+      else: 
+        add(res, newLeaf(p))
+    else: 
+      rstMessage(p, meExpected, endStr)
+      break 
+    inc(p.idx)
+  result = res
+
+proc untilEol(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnInner)
+  while not (p.tok[p.idx].kind in {tkIndent, tkEof}): 
+    add(result, newLeaf(p))
+    inc(p.idx)
+
+proc expect(p: var TRstParser, tok: string) = 
+  if p.tok[p.idx].symbol == tok: inc(p.idx)
+  else: rstMessage(p, meExpected, tok)
+  
+proc isInlineMarkupEnd(p: TRstParser, markup: string): bool = 
+  result = p.tok[p.idx].symbol == markup
+  if not result: 
+    return                    # Rule 3:
+  result = not (p.tok[p.idx - 1].kind in {tkIndent, tkWhite})
+  if not result: 
+    return                    # Rule 4:
+  result = (p.tok[p.idx + 1].kind in {tkIndent, tkWhite, tkEof}) or
+      (p.tok[p.idx + 1].symbol[0] in
+      {'\'', '\"', ')', ']', '}', '>', '-', '/', '\\', ':', '.', ',', ';', '!', 
+       '?', '_'})
+  if not result: 
+    return                    # Rule 7:
+  if p.idx > 0: 
+    if (markup != "``") and (p.tok[p.idx - 1].symbol == "\\"): 
+      result = false
+
+proc isInlineMarkupStart(p: TRstParser, markup: string): bool = 
+  var d: Char
+  result = p.tok[p.idx].symbol == markup
+  if not result: 
+    return                    # Rule 1:
+  result = (p.idx == 0) or (p.tok[p.idx - 1].kind in {tkIndent, tkWhite}) or
+      (p.tok[p.idx - 1].symbol[0] in
+      {'\'', '\"', '(', '[', '{', '<', '-', '/', ':', '_'})
+  if not result: 
+    return                    # Rule 2:
+  result = not (p.tok[p.idx + 1].kind in {tkIndent, tkWhite, tkEof})
+  if not result: 
+    return                    # Rule 5 & 7:
+  if p.idx > 0: 
+    if p.tok[p.idx - 1].symbol == "\\": 
+      result = false
+    else: 
+      var c = p.tok[p.idx - 1].symbol[0]
+      case c
+      of '\'', '\"': d = c
+      of '(': d = ')'
+      of '[': d = ']'
+      of '{': d = '}'
+      of '<': d = '>'
+      else: d = '\0'
+      if d != '\0': result = p.tok[p.idx + 1].symbol[0] != d
+
+proc match(p: TRstParser, start: int, expr: string): bool = 
+  # regular expressions are:
+  # special char     exact match
+  # 'w'              tkWord
+  # ' '              tkWhite
+  # 'a'              tkAdornment
+  # 'i'              tkIndent
+  # 'p'              tkPunct
+  # 'T'              always true
+  # 'E'              whitespace, indent or eof
+  # 'e'              tkWord or '#' (for enumeration lists)
+  var i = 0
+  var j = start
+  var last = len(expr) - 1
+  while i <= last: 
+    case expr[i]
+    of 'w': result = p.tok[j].kind == tkWord
+    of ' ': result = p.tok[j].kind == tkWhite
+    of 'i': result = p.tok[j].kind == tkIndent
+    of 'p': result = p.tok[j].kind == tkPunct
+    of 'a': result = p.tok[j].kind == tkAdornment
+    of 'o': result = p.tok[j].kind == tkOther
+    of 'T': result = true
+    of 'E': result = p.tok[j].kind in {tkEof, tkWhite, tkIndent}
+    of 'e': 
+      result = (p.tok[j].kind == tkWord) or (p.tok[j].symbol == "#")
+      if result: 
+        case p.tok[j].symbol[0]
+        of 'a'..'z', 'A'..'Z': result = len(p.tok[j].symbol) == 1
+        of '0'..'9': result = allCharsInSet(p.tok[j].symbol, {'0'..'9'})
+        else: nil
+    else: 
+      var c = expr[i]
+      var length = 0
+      while (i <= last) and (expr[i] == c): 
+        inc(i)
+        inc(length)
+      dec(i)
+      result = (p.tok[j].kind in {tkPunct, tkAdornment}) and
+          (len(p.tok[j].symbol) == length) and (p.tok[j].symbol[0] == c)
+    if not result: return 
+    inc(j)
+    inc(i)
+  result = true
+  
+proc fixupEmbeddedRef(n, a, b: PRstNode) = 
+  var sep = - 1
+  for i in countdown(len(n) - 2, 0): 
+    if n.sons[i].text == "<": 
+      sep = i
+      break 
+  var incr = if (sep > 0) and (n.sons[sep - 1].text[0] == ' '): 2 else: 1
+  for i in countup(0, sep - incr): add(a, n.sons[i])
+  for i in countup(sep + 1, len(n) - 2): add(b, n.sons[i])
+  
+proc parsePostfix(p: var TRstParser, n: PRstNode): PRstNode = 
+  result = n
+  if isInlineMarkupEnd(p, "_"): 
+    inc(p.idx)
+    if p.tok[p.idx-2].symbol == "`" and p.tok[p.idx-3].symbol == ">":
+      var a = newRstNode(rnInner)
+      var b = newRstNode(rnInner)
+      fixupEmbeddedRef(n, a, b)
+      if len(a) == 0: 
+        result = newRstNode(rnStandaloneHyperlink)
+        add(result, b)
+      else: 
+        result = newRstNode(rnHyperlink)
+        add(result, a)
+        add(result, b)
+        setRef(p, rstnodeToRefname(a), b)
+    elif n.kind == rnInterpretedText: 
+      n.kind = rnRef
+    else: 
+      result = newRstNode(rnRef)
+      add(result, n)
+  elif match(p, p.idx, ":w:"): 
+    # a role:
+    if p.tok[p.idx + 1].symbol == "idx": 
+      n.kind = rnIdx
+    elif p.tok[p.idx + 1].symbol == "literal": 
+      n.kind = rnInlineLiteral
+    elif p.tok[p.idx + 1].symbol == "strong": 
+      n.kind = rnStrongEmphasis
+    elif p.tok[p.idx + 1].symbol == "emphasis": 
+      n.kind = rnEmphasis
+    elif (p.tok[p.idx + 1].symbol == "sub") or
+        (p.tok[p.idx + 1].symbol == "subscript"): 
+      n.kind = rnSub
+    elif (p.tok[p.idx + 1].symbol == "sup") or
+        (p.tok[p.idx + 1].symbol == "supscript"): 
+      n.kind = rnSup
+    else: 
+      result = newRstNode(rnGeneralRole)
+      n.kind = rnInner
+      add(result, n)
+      add(result, newRstNode(rnLeaf, p.tok[p.idx + 1].symbol))
+    inc(p.idx, 3)
+
+proc matchVerbatim(p: TRstParser, start: int, expr: string): int =
+  result = start
+  var j = 0
+  while j < expr.len and continuesWith(expr, p.tok[result].symbol, j):
+    inc j, p.tok[result].symbol.len
+    inc result
+  if j < expr.len: result = 0
+  
+proc parseSmiley(p: var TRstParser): PRstNode =
+  if p.tok[p.idx].symbol[0] notin SmileyStartChars: return
+  for key, val in items(smilies):
+    let m = matchVerbatim(p, p.idx, key)
+    if m > 0:
+      p.idx = m
+      result = newRstNode(rnSmiley)
+      result.text = val
+      return
+
+when false:
+  const
+    urlChars = {'A'..'Z', 'a'..'z', '0'..'9', ':', '#', '@', '%', '/', ';',
+                 '$', '(', ')', '~', '_', '?', '+', '-', '=', '\\', '.', '&',
+                 '\128'..'\255'}
+
+proc isURL(p: TRstParser, i: int): bool =
+  result = (p.tok[i+1].symbol == ":") and (p.tok[i+2].symbol == "//") and
+    (p.tok[i+3].kind == tkWord) and
+    (p.tok[i].symbol in ["http", "https", "ftp", "telnet", "file"])
+
+proc parseURL(p: var TRstParser, father: PRstNode) = 
+  #if p.tok[p.idx].symbol[strStart] == '<':
+  if isURL(p, p.idx):
+    var n = newRstNode(rnStandaloneHyperlink)
+    while true: 
+      case p.tok[p.idx].kind
+      of tkWord, tkAdornment, tkOther: nil
+      of tkPunct: 
+        if p.tok[p.idx+1].kind notin {tkWord, tkAdornment, tkOther, tkPunct}:
+          break
+      else: break 
+      add(n, newLeaf(p))
+      inc(p.idx)
+    add(father, n)
+  else:
+    var n = newLeaf(p)
+    inc(p.idx)
+    if p.tok[p.idx].symbol == "_": n = parsePostfix(p, n)
+    add(father, n)
+  
+proc parseBackslash(p: var TRstParser, father: PRstNode) = 
+  assert(p.tok[p.idx].kind == tkPunct)
+  if p.tok[p.idx].symbol == "\\\\": 
+    add(father, newRstNode(rnLeaf, "\\"))
+    inc(p.idx)
+  elif p.tok[p.idx].symbol == "\\": 
+    # XXX: Unicode?
+    inc(p.idx)
+    if p.tok[p.idx].kind != tkWhite: add(father, newLeaf(p))
+    if p.tok[p.idx].kind != tkEof: inc(p.idx)
+  else:
+    add(father, newLeaf(p))
+    inc(p.idx)
+
+when false:
+  proc parseAdhoc(p: var TRstParser, father: PRstNode, verbatim: bool) =
+    if not verbatim and isURL(p, p.idx):
+      var n = newRstNode(rnStandaloneHyperlink)
+      while true: 
+        case p.tok[p.idx].kind
+        of tkWord, tkAdornment, tkOther: nil
+        of tkPunct: 
+          if p.tok[p.idx+1].kind notin {tkWord, tkAdornment, tkOther, tkPunct}:
+            break
+        else: break 
+        add(n, newLeaf(p))
+        inc(p.idx)
+      add(father, n)
+    elif not verbatim and roSupportSmilies in p.sharedState.options:
+      let n = parseSmiley(p)
+      if s != nil:
+        add(father, n)
+    else:
+      var n = newLeaf(p)
+      inc(p.idx)
+      if p.tok[p.idx].symbol == "_": n = parsePostfix(p, n)
+      add(father, n)
+
+proc parseUntil(p: var TRstParser, father: PRstNode, postfix: string, 
+                interpretBackslash: bool) = 
+  let
+    line = p.tok[p.idx].line
+    col = p.tok[p.idx].col
+  while true: 
+    case p.tok[p.idx].kind
+    of tkPunct: 
+      if isInlineMarkupEnd(p, postfix): 
+        inc(p.idx)
+        break 
+      elif interpretBackslash: 
+        parseBackslash(p, father)
+      else: 
+        add(father, newLeaf(p))
+        inc(p.idx)
+    of tkAdornment, tkWord, tkOther: 
+      add(father, newLeaf(p))
+      inc(p.idx)
+    of tkIndent: 
+      add(father, newRstNode(rnLeaf, " "))
+      inc(p.idx)
+      if p.tok[p.idx].kind == tkIndent: 
+        rstMessage(p, meExpected, postfix)
+        break 
+    of tkWhite: 
+      add(father, newRstNode(rnLeaf, " "))
+      inc(p.idx)
+    else: rstMessage(p, meExpected, postfix, line, col)
+
+proc parseMarkdownCodeblock(p: var TRstParser): PRstNode =
+  var args = newRstNode(rnDirArg)
+  if p.tok[p.idx].kind == tkWord:
+    add(args, newLeaf(p))
+    inc(p.idx)
+  else:
+    args = nil
+  var n = newRstNode(rnLeaf, "")
+  while true:
+    case p.tok[p.idx].kind
+    of tkEof:
+      rstMessage(p, meExpected, "```")
+      break
+    of tkPunct:
+      if p.tok[p.idx].symbol == "```":
+        inc(p.idx)
+        break
+      else:
+        add(n.text, p.tok[p.idx].symbol)
+        inc(p.idx)
+    else:
+      add(n.text, p.tok[p.idx].symbol)
+      inc(p.idx)
+  var lb = newRstNode(rnLiteralBlock)
+  add(lb, n)
+  result = newRstNode(rnCodeBlock)
+  add(result, args)
+  add(result, nil)
+  add(result, lb)  
+  
+proc parseInline(p: var TRstParser, father: PRstNode) = 
+  case p.tok[p.idx].kind
+  of tkPunct: 
+    if isInlineMarkupStart(p, "***"):
+      inc(p.idx)
+      var n = newRstNode(rnTripleEmphasis)
+      parseUntil(p, n, "***", true)
+      add(father, n)
+    elif isInlineMarkupStart(p, "**"): 
+      inc(p.idx)
+      var n = newRstNode(rnStrongEmphasis)
+      parseUntil(p, n, "**", true)
+      add(father, n)
+    elif isInlineMarkupStart(p, "*"): 
+      inc(p.idx)
+      var n = newRstNode(rnEmphasis)
+      parseUntil(p, n, "*", true)
+      add(father, n)
+    elif roSupportMarkdown in p.s.options and p.tok[p.idx].symbol == "```":
+      inc(p.idx)
+      add(father, parseMarkdownCodeblock(p))
+    elif isInlineMarkupStart(p, "``"):
+      inc(p.idx)
+      var n = newRstNode(rnInlineLiteral)
+      parseUntil(p, n, "``", false)
+      add(father, n)
+    elif isInlineMarkupStart(p, "`"): 
+      inc(p.idx)
+      var n = newRstNode(rnInterpretedText)
+      parseUntil(p, n, "`", true)
+      n = parsePostfix(p, n)
+      add(father, n)
+    elif isInlineMarkupStart(p, "|"): 
+      inc(p.idx)
+      var n = newRstNode(rnSubstitutionReferences)
+      parseUntil(p, n, "|", false)
+      add(father, n)
+    else:
+      if roSupportSmilies in p.s.options:
+        let n = parseSmiley(p)
+        if n != nil:
+          add(father, n)
+          return
+      parseBackslash(p, father)
+  of tkWord:
+    if roSupportSmilies in p.s.options:
+      let n = parseSmiley(p)
+      if n != nil:
+        add(father, n)
+        return
+    parseUrl(p, father)
+  of tkAdornment, tkOther, tkWhite: 
+    if roSupportSmilies in p.s.options:
+      let n = parseSmiley(p)
+      if n != nil:
+        add(father, n)
+        return
+    add(father, newLeaf(p))
+    inc(p.idx)
+  else: nil
+  
+proc getDirective(p: var TRstParser): string = 
+  if p.tok[p.idx].kind == tkWhite and p.tok[p.idx+1].kind == tkWord: 
+    var j = p.idx
+    inc(p.idx)
+    result = p.tok[p.idx].symbol
+    inc(p.idx)
+    while p.tok[p.idx].kind in {tkWord, tkPunct, tkAdornment, tkOther}: 
+      if p.tok[p.idx].symbol == "::": break 
+      add(result, p.tok[p.idx].symbol)
+      inc(p.idx)
+    if p.tok[p.idx].kind == tkWhite: inc(p.idx)
+    if p.tok[p.idx].symbol == "::": 
+      inc(p.idx)
+      if (p.tok[p.idx].kind == tkWhite): inc(p.idx)
+    else: 
+      p.idx = j               # set back
+      result = ""             # error
+  else: 
+    result = ""
+  
+proc parseComment(p: var TRstParser): PRstNode = 
+  case p.tok[p.idx].kind
+  of tkIndent, tkEof: 
+    if p.tok[p.idx].kind != tkEof and p.tok[p.idx + 1].kind == tkIndent: 
+      inc(p.idx)              # empty comment
+    else: 
+      var indent = p.tok[p.idx].ival
+      while True: 
+        case p.tok[p.idx].kind
+        of tkEof: 
+          break 
+        of tkIndent: 
+          if (p.tok[p.idx].ival < indent): break 
+        else: 
+          nil
+        inc(p.idx)
+  else:
+    while p.tok[p.idx].kind notin {tkIndent, tkEof}: inc(p.idx)
+  result = nil
+
+type 
+  TDirKind = enum             # must be ordered alphabetically!
+    dkNone, dkAuthor, dkAuthors, dkCodeBlock, dkContainer, dkContents,
+    dkFigure, dkImage, dkInclude, dkIndex, dkRaw, dkTitle
+
+const 
+  DirIds: array[0..11, string] = ["", "author", "authors", "code-block", 
+    "container", "contents", "figure", "image", "include", "index", "raw", 
+    "title"]
+
+proc getDirKind(s: string): TDirKind = 
+  let i = find(DirIds, s)
+  if i >= 0: result = TDirKind(i)
+  else: result = dkNone
+  
+proc parseLine(p: var TRstParser, father: PRstNode) = 
+  while True: 
+    case p.tok[p.idx].kind
+    of tkWhite, tkWord, tkOther, tkPunct: parseInline(p, father)
+    else: break 
+  
+proc parseSection(p: var TRstParser, result: PRstNode)
+proc parseField(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnField)
+  var col = p.tok[p.idx].col
+  inc(p.idx)                  # skip :
+  var fieldname = newRstNode(rnFieldname)
+  parseUntil(p, fieldname, ":", false)
+  var fieldbody = newRstNode(rnFieldbody)
+  if p.tok[p.idx].kind != tkIndent: parseLine(p, fieldbody)
+  if p.tok[p.idx].kind == tkIndent: 
+    var indent = p.tok[p.idx].ival
+    if indent > col: 
+      pushInd(p, indent)
+      parseSection(p, fieldbody)
+      popInd(p)
+  add(result, fieldname)
+  add(result, fieldbody)
+
+proc parseFields(p: var TRstParser): PRstNode = 
+  result = nil
+  var atStart = p.idx == 0 and p.tok[0].symbol == ":"
+  if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx + 1].symbol == ":") or
+      atStart:
+    var col = if atStart: p.tok[p.idx].col else: p.tok[p.idx].ival
+    result = newRstNode(rnFieldList)
+    if not atStart: inc(p.idx)
+    while true: 
+      add(result, parseField(p))
+      if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx].ival == col) and
+          (p.tok[p.idx + 1].symbol == ":"): 
+        inc(p.idx)
+      else: 
+        break 
+  
+proc getFieldValue(n: PRstNode, fieldname: string): string = 
+  result = ""
+  if n.sons[1] == nil: return 
+  if (n.sons[1].kind != rnFieldList): 
+    #InternalError("getFieldValue (2): " & $n.sons[1].kind)
+    # We don't like internal errors here anymore as that would break the forum!
+    return
+  for i in countup(0, len(n.sons[1]) - 1): 
+    var f = n.sons[1].sons[i]
+    if cmpIgnoreStyle(addNodes(f.sons[0]), fieldname) == 0: 
+      result = addNodes(f.sons[1])
+      if result == "": result = "\x01\x01" # indicates that the field exists
+      return 
+
+proc getArgument(n: PRstNode): string = 
+  if n.sons[0] == nil: result = ""
+  else: result = addNodes(n.sons[0])
+  
+proc parseDotDot(p: var TRstParser): PRstNode
+proc parseLiteralBlock(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnLiteralBlock)
+  var n = newRstNode(rnLeaf, "")
+  if p.tok[p.idx].kind == tkIndent: 
+    var indent = p.tok[p.idx].ival
+    inc(p.idx)
+    while True: 
+      case p.tok[p.idx].kind
+      of tkEof: 
+        break 
+      of tkIndent: 
+        if (p.tok[p.idx].ival < indent): 
+          break 
+        else: 
+          add(n.text, "\n")
+          add(n.text, repeatChar(p.tok[p.idx].ival - indent))
+          inc(p.idx)
+      else: 
+        add(n.text, p.tok[p.idx].symbol)
+        inc(p.idx)
+  else: 
+    while not (p.tok[p.idx].kind in {tkIndent, tkEof}): 
+      add(n.text, p.tok[p.idx].symbol)
+      inc(p.idx)
+  add(result, n)
+
+proc getLevel(map: var TLevelMap, lvl: var int, c: Char): int = 
+  if map[c] == 0: 
+    inc(lvl)
+    map[c] = lvl
+  result = map[c]
+
+proc tokenAfterNewline(p: TRstParser): int = 
+  result = p.idx
+  while true: 
+    case p.tok[result].kind
+    of tkEof: 
+      break 
+    of tkIndent: 
+      inc(result)
+      break 
+    else: inc(result)
+  
+proc isLineBlock(p: TRstParser): bool = 
+  var j = tokenAfterNewline(p)
+  result = (p.tok[p.idx].col == p.tok[j].col) and (p.tok[j].symbol == "|") or
+      (p.tok[j].col > p.tok[p.idx].col)
+
+proc predNL(p: TRstParser): bool = 
+  result = true
+  if p.idx > 0:
+    result = p.tok[p.idx-1].kind == tkIndent and
+        p.tok[p.idx-1].ival == currInd(p)
+  
+proc isDefList(p: TRstParser): bool = 
+  var j = tokenAfterNewline(p)
+  result = (p.tok[p.idx].col < p.tok[j].col) and
+      (p.tok[j].kind in {tkWord, tkOther, tkPunct}) and
+      (p.tok[j - 2].symbol != "::")
+
+proc isOptionList(p: TRstParser): bool = 
+  result = match(p, p.idx, "-w") or match(p, p.idx, "--w") or
+           match(p, p.idx, "/w") or match(p, p.idx, "//w")
+
+proc whichSection(p: TRstParser): TRstNodeKind = 
+  case p.tok[p.idx].kind
+  of tkAdornment: 
+    if match(p, p.idx + 1, "ii"): result = rnTransition
+    elif match(p, p.idx + 1, " a"): result = rnTable
+    elif match(p, p.idx + 1, "i"): result = rnOverline
+    else: result = rnLeaf
+  of tkPunct: 
+    if match(p, tokenAfterNewLine(p), "ai"): 
+      result = rnHeadline
+    elif p.tok[p.idx].symbol == "::": 
+      result = rnLiteralBlock
+    elif predNL(p) and
+        ((p.tok[p.idx].symbol == "+") or (p.tok[p.idx].symbol == "*") or
+        (p.tok[p.idx].symbol == "-")) and (p.tok[p.idx + 1].kind == tkWhite): 
+      result = rnBulletList
+    elif (p.tok[p.idx].symbol == "|") and isLineBlock(p): 
+      result = rnLineBlock
+    elif (p.tok[p.idx].symbol == "..") and predNL(p): 
+      result = rnDirective
+    elif match(p, p.idx, ":w:") and predNL(p):
+      # (p.tok[p.idx].symbol == ":")
+      result = rnFieldList
+    elif match(p, p.idx, "(e) "): 
+      result = rnEnumList
+    elif match(p, p.idx, "+a+"): 
+      result = rnGridTable
+      rstMessage(p, meGridTableNotImplemented)
+    elif isDefList(p): 
+      result = rnDefList
+    elif isOptionList(p): 
+      result = rnOptionList
+    else: 
+      result = rnParagraph
+  of tkWord, tkOther, tkWhite:
+    if match(p, tokenAfterNewLine(p), "ai"): result = rnHeadline
+    elif match(p, p.idx, "e) ") or match(p, p.idx, "e. "): result = rnEnumList
+    elif isDefList(p): result = rnDefList
+    else: result = rnParagraph
+  else: result = rnLeaf
+  
+proc parseLineBlock(p: var TRstParser): PRstNode = 
+  result = nil
+  if p.tok[p.idx + 1].kind == tkWhite: 
+    var col = p.tok[p.idx].col
+    result = newRstNode(rnLineBlock)
+    pushInd(p, p.tok[p.idx + 2].col)
+    inc(p.idx, 2)
+    while true: 
+      var item = newRstNode(rnLineBlockItem)
+      parseSection(p, item)
+      add(result, item)
+      if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx].ival == col) and
+          (p.tok[p.idx + 1].symbol == "|") and
+          (p.tok[p.idx + 2].kind == tkWhite): 
+        inc(p.idx, 3)
+      else: 
+        break 
+    popInd(p)
+
+proc parseParagraph(p: var TRstParser, result: PRstNode) = 
+  while True: 
+    case p.tok[p.idx].kind
+    of tkIndent: 
+      if p.tok[p.idx + 1].kind == tkIndent: 
+        inc(p.idx)
+        break 
+      elif (p.tok[p.idx].ival == currInd(p)): 
+        inc(p.idx)
+        case whichSection(p)
+        of rnParagraph, rnLeaf, rnHeadline, rnOverline, rnDirective: 
+          add(result, newRstNode(rnLeaf, " "))
+        of rnLineBlock: 
+          addIfNotNil(result, parseLineBlock(p))
+        else: break 
+      else: 
+        break 
+    of tkPunct: 
+      if (p.tok[p.idx].symbol == "::") and
+          (p.tok[p.idx + 1].kind == tkIndent) and
+          (currInd(p) < p.tok[p.idx + 1].ival): 
+        add(result, newRstNode(rnLeaf, ":"))
+        inc(p.idx)            # skip '::'
+        add(result, parseLiteralBlock(p))
+        break 
+      else: 
+        parseInline(p, result)
+    of tkWhite, tkWord, tkAdornment, tkOther: 
+      parseInline(p, result)
+    else: break
+
+proc parseHeadline(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnHeadline)
+  parseLine(p, result)
+  assert(p.tok[p.idx].kind == tkIndent)
+  assert(p.tok[p.idx + 1].kind == tkAdornment)
+  var c = p.tok[p.idx + 1].symbol[0]
+  inc(p.idx, 2)
+  result.level = getLevel(p.s.underlineToLevel, p.s.uLevel, c)
+
+type 
+  TIntSeq = seq[int]
+
+proc tokEnd(p: TRstParser): int = 
+  result = p.tok[p.idx].col + len(p.tok[p.idx].symbol) - 1
+
+proc getColumns(p: var TRstParser, cols: var TIntSeq) = 
+  var L = 0
+  while true: 
+    inc(L)
+    setlen(cols, L)
+    cols[L - 1] = tokEnd(p)
+    assert(p.tok[p.idx].kind == tkAdornment)
+    inc(p.idx)
+    if p.tok[p.idx].kind != tkWhite: break 
+    inc(p.idx)
+    if p.tok[p.idx].kind != tkAdornment: break 
+  if p.tok[p.idx].kind == tkIndent: inc(p.idx)                
+  # last column has no limit:
+  cols[L - 1] = 32000
+
+proc parseDoc(p: var TRstParser): PRstNode
+
+proc parseSimpleTable(p: var TRstParser): PRstNode = 
+  var 
+    cols: TIntSeq
+    row: seq[string]
+    i, last, line: int
+    c: Char
+    q: TRstParser
+    a, b: PRstNode
+  result = newRstNode(rnTable)
+  cols = @[]
+  row = @[]
+  a = nil
+  c = p.tok[p.idx].symbol[0]
+  while true: 
+    if p.tok[p.idx].kind == tkAdornment: 
+      last = tokenAfterNewline(p)
+      if p.tok[last].kind in {tkEof, tkIndent}: 
+        # skip last adornment line:
+        p.idx = last
+        break 
+      getColumns(p, cols)
+      setlen(row, len(cols))
+      if a != nil: 
+        for j in 0..len(a)-1: a.sons[j].kind = rnTableHeaderCell
+    if p.tok[p.idx].kind == tkEof: break 
+    for j in countup(0, high(row)): row[j] = ""
+    # the following while loop iterates over the lines a single cell may span:
+    line = p.tok[p.idx].line
+    while true: 
+      i = 0
+      while not (p.tok[p.idx].kind in {tkIndent, tkEof}): 
+        if (tokEnd(p) <= cols[i]): 
+          add(row[i], p.tok[p.idx].symbol)
+          inc(p.idx)
+        else: 
+          if p.tok[p.idx].kind == tkWhite: inc(p.idx)
+          inc(i)
+      if p.tok[p.idx].kind == tkIndent: inc(p.idx)
+      if tokEnd(p) <= cols[0]: break 
+      if p.tok[p.idx].kind in {tkEof, tkAdornment}: break 
+      for j in countup(1, high(row)): add(row[j], '\x0A')
+    a = newRstNode(rnTableRow)
+    for j in countup(0, high(row)): 
+      initParser(q, p.s)
+      q.col = cols[j]
+      q.line = line - 1
+      q.filename = p.filename
+      getTokens(row[j], false, q.tok)
+      b = newRstNode(rnTableDataCell)
+      add(b, parseDoc(q))
+      add(a, b)
+    add(result, a)
+
+proc parseTransition(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnTransition)
+  inc(p.idx)
+  if p.tok[p.idx].kind == tkIndent: inc(p.idx)
+  if p.tok[p.idx].kind == tkIndent: inc(p.idx)
+  
+proc parseOverline(p: var TRstParser): PRstNode = 
+  var c = p.tok[p.idx].symbol[0]
+  inc(p.idx, 2)
+  result = newRstNode(rnOverline)
+  while true: 
+    parseLine(p, result)
+    if p.tok[p.idx].kind == tkIndent: 
+      inc(p.idx)
+      if p.tok[p.idx - 1].ival > currInd(p): 
+        add(result, newRstNode(rnLeaf, " "))
+      else: 
+        break 
+    else: 
+      break 
+  result.level = getLevel(p.s.overlineToLevel, p.s.oLevel, c)
+  if p.tok[p.idx].kind == tkAdornment: 
+    inc(p.idx)                # XXX: check?
+    if p.tok[p.idx].kind == tkIndent: inc(p.idx)
+  
+proc parseBulletList(p: var TRstParser): PRstNode = 
+  result = nil
+  if p.tok[p.idx + 1].kind == tkWhite: 
+    var bullet = p.tok[p.idx].symbol
+    var col = p.tok[p.idx].col
+    result = newRstNode(rnBulletList)
+    pushInd(p, p.tok[p.idx + 2].col)
+    inc(p.idx, 2)
+    while true: 
+      var item = newRstNode(rnBulletItem)
+      parseSection(p, item)
+      add(result, item)
+      if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx].ival == col) and
+          (p.tok[p.idx + 1].symbol == bullet) and
+          (p.tok[p.idx + 2].kind == tkWhite): 
+        inc(p.idx, 3)
+      else: 
+        break 
+    popInd(p)
+
+proc parseOptionList(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnOptionList)
+  while true: 
+    if isOptionList(p):
+      var a = newRstNode(rnOptionGroup)
+      var b = newRstNode(rnDescription)
+      var c = newRstNode(rnOptionListItem)
+      if match(p, p.idx, "//w"): inc(p.idx)
+      while not (p.tok[p.idx].kind in {tkIndent, tkEof}): 
+        if (p.tok[p.idx].kind == tkWhite) and (len(p.tok[p.idx].symbol) > 1): 
+          inc(p.idx)
+          break 
+        add(a, newLeaf(p))
+        inc(p.idx)
+      var j = tokenAfterNewline(p)
+      if (j > 0) and (p.tok[j - 1].kind == tkIndent) and
+          (p.tok[j - 1].ival > currInd(p)): 
+        pushInd(p, p.tok[j - 1].ival)
+        parseSection(p, b)
+        popInd(p)
+      else: 
+        parseLine(p, b)
+      if (p.tok[p.idx].kind == tkIndent): inc(p.idx)
+      add(c, a)
+      add(c, b)
+      add(result, c)
+    else: 
+      break 
+  
+proc parseDefinitionList(p: var TRstParser): PRstNode = 
+  result = nil
+  var j = tokenAfterNewLine(p) - 1
+  if (j >= 1) and (p.tok[j].kind == tkIndent) and
+      (p.tok[j].ival > currInd(p)) and (p.tok[j - 1].symbol != "::"): 
+    var col = p.tok[p.idx].col
+    result = newRstNode(rnDefList)
+    while true: 
+      j = p.idx
+      var a = newRstNode(rnDefName)
+      parseLine(p, a)
+      if (p.tok[p.idx].kind == tkIndent) and
+          (p.tok[p.idx].ival > currInd(p)) and
+          (p.tok[p.idx + 1].symbol != "::") and
+          not (p.tok[p.idx + 1].kind in {tkIndent, tkEof}): 
+        pushInd(p, p.tok[p.idx].ival)
+        var b = newRstNode(rnDefBody)
+        parseSection(p, b)
+        var c = newRstNode(rnDefItem)
+        add(c, a)
+        add(c, b)
+        add(result, c)
+        popInd(p)
+      else: 
+        p.idx = j
+        break 
+      if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx].ival == col): 
+        inc(p.idx)
+        j = tokenAfterNewLine(p) - 1
+        if j >= 1 and p.tok[j].kind == tkIndent and p.tok[j].ival > col and
+            p.tok[j-1].symbol != "::" and p.tok[j+1].kind != tkIndent: 
+          nil
+        else: 
+          break 
+    if len(result) == 0: result = nil
+  
+proc parseEnumList(p: var TRstParser): PRstNode = 
+  const 
+    wildcards: array[0..2, string] = ["(e) ", "e) ", "e. "]
+    wildpos: array[0..2, int] = [1, 0, 0]
+  result = nil
+  var w = 0
+  while w <= 2: 
+    if match(p, p.idx, wildcards[w]): break 
+    inc(w)
+  if w <= 2: 
+    var col = p.tok[p.idx].col
+    result = newRstNode(rnEnumList)
+    inc(p.idx, wildpos[w] + 3)
+    var j = tokenAfterNewLine(p)
+    if (p.tok[j].col == p.tok[p.idx].col) or match(p, j, wildcards[w]): 
+      pushInd(p, p.tok[p.idx].col)
+      while true: 
+        var item = newRstNode(rnEnumItem)
+        parseSection(p, item)
+        add(result, item)
+        if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx].ival == col) and
+            match(p, p.idx + 1, wildcards[w]): 
+          inc(p.idx, wildpos[w] + 4)
+        else: 
+          break 
+      popInd(p)
+    else: 
+      dec(p.idx, wildpos[w] + 3)
+      result = nil
+
+proc sonKind(father: PRstNode, i: int): TRstNodeKind = 
+  result = rnLeaf
+  if i < len(father): result = father.sons[i].kind
+  
+proc parseSection(p: var TRstParser, result: PRstNode) = 
+  while true: 
+    var leave = false
+    assert(p.idx >= 0)
+    while p.tok[p.idx].kind == tkIndent: 
+      if currInd(p) == p.tok[p.idx].ival: 
+        inc(p.idx)
+      elif p.tok[p.idx].ival > currInd(p): 
+        pushInd(p, p.tok[p.idx].ival)
+        var a = newRstNode(rnBlockQuote)
+        parseSection(p, a)
+        add(result, a)
+        popInd(p)
+      else: 
+        leave = true
+        break
+    if leave or p.tok[p.idx].kind == tkEof: break
+    var a: PRstNode = nil
+    var k = whichSection(p)
+    case k
+    of rnLiteralBlock: 
+      inc(p.idx)              # skip '::'
+      a = parseLiteralBlock(p)
+    of rnBulletList: a = parseBulletList(p)
+    of rnLineblock: a = parseLineBlock(p)
+    of rnDirective: a = parseDotDot(p)
+    of rnEnumList: a = parseEnumList(p)
+    of rnLeaf: rstMessage(p, meNewSectionExpected)
+    of rnParagraph: nil
+    of rnDefList: a = parseDefinitionList(p)
+    of rnFieldList: 
+      if p.idx > 0: dec(p.idx)
+      a = parseFields(p)
+    of rnTransition: a = parseTransition(p)
+    of rnHeadline: a = parseHeadline(p)
+    of rnOverline: a = parseOverline(p)
+    of rnTable: a = parseSimpleTable(p)
+    of rnOptionList: a = parseOptionList(p)
+    else:
+      #InternalError("rst.parseSection()")
+      nil
+    if a == nil and k != rnDirective: 
+      a = newRstNode(rnParagraph)
+      parseParagraph(p, a)
+    addIfNotNil(result, a)
+  if sonKind(result, 0) == rnParagraph and sonKind(result, 1) != rnParagraph: 
+    result.sons[0].kind = rnInner
+  
+proc parseSectionWrapper(p: var TRstParser): PRstNode = 
+  result = newRstNode(rnInner)
+  parseSection(p, result)
+  while (result.kind == rnInner) and (len(result) == 1): 
+    result = result.sons[0]
+  
+proc `$`(t: TToken): string =
+  result = $t.kind & ' ' & (if isNil(t.symbol): "NIL" else: t.symbol)
+
+proc parseDoc(p: var TRstParser): PRstNode = 
+  result = parseSectionWrapper(p)
+  if p.tok[p.idx].kind != tkEof: 
+    when false:
+      assert isAllocatedPtr(cast[pointer](p.tok))
+      for i in 0 .. high(p.tok):
+        assert isNil(p.tok[i].symbol) or 
+               isAllocatedPtr(cast[pointer](p.tok[i].symbol))
+      echo "index: ", p.idx, " length: ", high(p.tok), "##",
+          p.tok[p.idx-1], p.tok[p.idx], p.tok[p.idx+1]
+    #assert isAllocatedPtr(cast[pointer](p.indentStack))
+    rstMessage(p, meGeneralParseError)
+  
+type
+  TDirFlag = enum
+    hasArg, hasOptions, argIsFile, argIsWord
+  TDirFlags = set[TDirFlag]
+  TSectionParser = proc (p: var TRstParser): PRstNode {.nimcall.}
+
+proc parseDirective(p: var TRstParser, flags: TDirFlags): PRstNode = 
+  result = newRstNode(rnDirective)
+  var args: PRstNode = nil
+  var options: PRstNode = nil
+  if hasArg in flags: 
+    args = newRstNode(rnDirArg)
+    if argIsFile in flags: 
+      while True: 
+        case p.tok[p.idx].kind
+        of tkWord, tkOther, tkPunct, tkAdornment: 
+          add(args, newLeaf(p))
+          inc(p.idx)
+        else: break 
+    elif argIsWord in flags:
+      while p.tok[p.idx].kind == tkWhite: inc(p.idx)
+      if p.tok[p.idx].kind == tkWord: 
+        add(args, newLeaf(p))
+        inc(p.idx)
+      else:
+        args = nil
+    else: 
+      parseLine(p, args)
+  add(result, args)
+  if hasOptions in flags: 
+    if (p.tok[p.idx].kind == tkIndent) and (p.tok[p.idx].ival >= 3) and
+        (p.tok[p.idx + 1].symbol == ":"): 
+      options = parseFields(p)
+  add(result, options)
+  
+proc indFollows(p: TRstParser): bool = 
+  result = p.tok[p.idx].kind == tkIndent and p.tok[p.idx].ival > currInd(p)
+  
+proc parseDirective(p: var TRstParser, flags: TDirFlags, 
+                    contentParser: TSectionParser): PRstNode = 
+  result = parseDirective(p, flags)
+  if not isNil(contentParser) and indFollows(p): 
+    pushInd(p, p.tok[p.idx].ival)
+    var content = contentParser(p)
+    popInd(p)
+    add(result, content)
+  else: 
+    add(result, nil)
+
+proc parseDirBody(p: var TRstParser, contentParser: TSectionParser): PRstNode = 
+  if indFollows(p): 
+    pushInd(p, p.tok[p.idx].ival)
+    result = contentParser(p)
+    popInd(p)
+  
+proc dirInclude(p: var TRstParser): PRstNode = 
+  #
+  #The following options are recognized:
+  #
+  #start-after : text to find in the external data file
+  #    Only the content after the first occurrence of the specified text will
+  #    be included.
+  #end-before : text to find in the external data file
+  #    Only the content before the first occurrence of the specified text
+  #    (but after any after text) will be included.
+  #literal : flag (empty)
+  #    The entire included text is inserted into the document as a single
+  #    literal block (useful for program listings).
+  #encoding : name of text encoding
+  #    The text encoding of the external data file. Defaults to the document's
+  #    encoding (if specified).
+  #
+  result = nil
+  var n = parseDirective(p, {hasArg, argIsFile, hasOptions}, nil)
+  var filename = strip(addNodes(n.sons[0]))
+  var path = p.s.findFile(filename)
+  if path == "": 
+    rstMessage(p, meCannotOpenFile, filename)
+  else: 
+    # XXX: error handling; recursive file inclusion!
+    if getFieldValue(n, "literal") != "": 
+      result = newRstNode(rnLiteralBlock)
+      add(result, newRstNode(rnLeaf, readFile(path)))
+    else: 
+      var q: TRstParser
+      initParser(q, p.s)
+      q.filename = filename
+      getTokens(readFile(path), false, q.tok) 
+      # workaround a GCC bug; more like the interior pointer bug?
+      #if find(q.tok[high(q.tok)].symbol, "\0\x01\x02") > 0:
+      #  InternalError("Too many binary zeros in include file")
+      result = parseDoc(q)
+
+proc dirCodeBlock(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {hasArg, hasOptions}, parseLiteralBlock)
+  var filename = strip(getFieldValue(result, "file"))
+  if filename != "": 
+    var path = p.s.findFile(filename)
+    if path == "": rstMessage(p, meCannotOpenFile, filename)
+    var n = newRstNode(rnLiteralBlock)
+    add(n, newRstNode(rnLeaf, readFile(path)))
+    result.sons[2] = n
+  result.kind = rnCodeBlock
+
+proc dirContainer(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {hasArg}, parseSectionWrapper)
+  assert(result.kind == rnDirective)
+  assert(len(result) == 3)
+  result.kind = rnContainer
+
+proc dirImage(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {hasOptions, hasArg, argIsFile}, nil)
+  result.kind = rnImage
+
+proc dirFigure(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {hasOptions, hasArg, argIsFile}, 
+                          parseSectionWrapper)
+  result.kind = rnFigure
+
+proc dirTitle(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {hasArg}, nil)
+  result.kind = rnTitle
+
+proc dirContents(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {hasArg}, nil)
+  result.kind = rnContents
+
+proc dirIndex(p: var TRstParser): PRstNode = 
+  result = parseDirective(p, {}, parseSectionWrapper)
+  result.kind = rnIndex
+
+proc dirRawAux(p: var TRstParser, result: var PRstNode, kind: TRstNodeKind,
+               contentParser: TSectionParser) = 
+  var filename = getFieldValue(result, "file")
+  if filename.len > 0: 
+    var path = p.s.findFile(filename)
+    if path.len == 0: 
+      rstMessage(p, meCannotOpenFile, filename)
+    else: 
+      var f = readFile(path)
+      result = newRstNode(kind)
+      add(result, newRstNode(rnLeaf, f))
+  else:      
+    result.kind = kind
+    add(result, parseDirBody(p, contentParser))
+
+proc dirRaw(p: var TRstParser): PRstNode = 
+  #
+  #The following options are recognized:
+  #
+  #file : string (newlines removed)
+  #    The local filesystem path of a raw data file to be included.
+  #
+  # html
+  # latex
+  result = parseDirective(p, {hasOptions, hasArg, argIsWord})
+  if result.sons[0] != nil:
+    if cmpIgnoreCase(result.sons[0].sons[0].text, "html") == 0:
+      dirRawAux(p, result, rnRawHtml, parseLiteralBlock)
+    elif cmpIgnoreCase(result.sons[0].sons[0].text, "latex") == 0: 
+      dirRawAux(p, result, rnRawLatex, parseLiteralBlock)
+    else:
+      rstMessage(p, meInvalidDirective, result.sons[0].text)
+  else:
+    dirRawAux(p, result, rnRaw, parseSectionWrapper)
+
+proc parseDotDot(p: var TRstParser): PRstNode = 
+  result = nil
+  var col = p.tok[p.idx].col
+  inc(p.idx)
+  var d = getDirective(p)
+  if d != "": 
+    pushInd(p, col)
+    case getDirKind(d)
+    of dkInclude: result = dirInclude(p)
+    of dkImage: result = dirImage(p)
+    of dkFigure: result = dirFigure(p)
+    of dkTitle: result = dirTitle(p)
+    of dkContainer: result = dirContainer(p)
+    of dkContents: result = dirContents(p)
+    of dkRaw:
+      if roSupportRawDirective in p.s.options:
+        result = dirRaw(p)
+      else:
+        rstMessage(p, meInvalidDirective, d)
+    of dkCodeblock: result = dirCodeBlock(p)
+    of dkIndex: result = dirIndex(p)
+    else: rstMessage(p, meInvalidDirective, d)
+    popInd(p)
+  elif match(p, p.idx, " _"): 
+    # hyperlink target:
+    inc(p.idx, 2)
+    var a = getReferenceName(p, ":")
+    if p.tok[p.idx].kind == tkWhite: inc(p.idx)
+    var b = untilEol(p)
+    setRef(p, rstnodeToRefname(a), b)
+  elif match(p, p.idx, " |"): 
+    # substitution definitions:
+    inc(p.idx, 2)
+    var a = getReferenceName(p, "|")
+    var b: PRstNode
+    if p.tok[p.idx].kind == tkWhite: inc(p.idx)
+    if cmpIgnoreStyle(p.tok[p.idx].symbol, "replace") == 0: 
+      inc(p.idx)
+      expect(p, "::")
+      b = untilEol(p)
+    elif cmpIgnoreStyle(p.tok[p.idx].symbol, "image") == 0: 
+      inc(p.idx)
+      b = dirImage(p)
+    else: 
+      rstMessage(p, meInvalidDirective, p.tok[p.idx].symbol)
+    setSub(p, addNodes(a), b)
+  elif match(p, p.idx, " ["): 
+    # footnotes, citations
+    inc(p.idx, 2)
+    var a = getReferenceName(p, "]")
+    if p.tok[p.idx].kind == tkWhite: inc(p.idx)
+    var b = untilEol(p)
+    setRef(p, rstnodeToRefname(a), b)
+  else: 
+    result = parseComment(p)
+  
+proc resolveSubs(p: var TRstParser, n: PRstNode): PRstNode = 
+  result = n
+  if n == nil: return 
+  case n.kind
+  of rnSubstitutionReferences: 
+    var x = findSub(p, n)
+    if x >= 0: 
+      result = p.s.subs[x].value
+    else: 
+      var key = addNodes(n)
+      var e = getEnv(key)
+      if e != "": result = newRstNode(rnLeaf, e)
+      else: rstMessage(p, mwUnknownSubstitution, key)
+  of rnRef: 
+    var y = findRef(p, rstnodeToRefname(n))
+    if y != nil: 
+      result = newRstNode(rnHyperlink)
+      n.kind = rnInner
+      add(result, n)
+      add(result, y)
+  of rnLeaf: 
+    nil
+  of rnContents: 
+    p.hasToc = true
+  else: 
+    for i in countup(0, len(n) - 1): n.sons[i] = resolveSubs(p, n.sons[i])
+  
+proc rstParse*(text, filename: string,
+               line, column: int, hasToc: var bool,
+               options: TRstParseOptions,
+               findFile: TFindFileHandler = nil,
+               msgHandler: TMsgHandler = nil): PRstNode =
+  var p: TRstParser
+  initParser(p, newSharedState(options, findFile, msgHandler))
+  p.filename = filename
+  p.line = line
+  p.col = column
+  getTokens(text, roSkipPounds in options, p.tok)
+  result = resolveSubs(p, parseDoc(p))
+  hasToc = p.hasToc