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# YML 2.6.0 language definition

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# written by VB.

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import re

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from pyPEG import keyword, _and, _not

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# pyPEG:

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#

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#   basestring:     terminal symbol (characters)

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#   keyword:        terminal symbol (keyword)

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#   matchobj:       terminal symbols (regex, use for scanning symbols)

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#   function:       named non-terminal symbol, recursive definition

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#                   if you don't want naming in output, precede name with an underscore

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#   tuple:          production sequence

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#   integer:        count in production sequence:

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#                    0: following element is optional

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#                   -1: following element can be omitted or repeated endless

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#                   -2: following element is required and can be repeated endless

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#   list:           options, choose one of them

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#   _not:           next element in production sequence is matched only if this would not

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#   _and:           next element in production sequence is matched only if this would, too

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newSyntax = True

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def oldSyntax():

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    global newSyntax

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    newSyntax = False

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def _if(cond, val):

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    if cond:

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        return val

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    else:

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        return ()

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def listing(x):     return x, -1, (",", x)

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r = re.compile

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comment = [r(r"//.*"), r(r"/\*.*?\*/", re.S)]

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_symbol = r"(?=\D)\w(\w|:)*"

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symbol = r(_symbol, re.U)

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pointer = r(r"\*" + _symbol, re.U)

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ppointer = r(r"\*\*" + _symbol, re.U)

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macro = r(r"\%" + _symbol, re.U)

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reference = r(r"\&" + _symbol, re.U)

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NameStartChar = r''':|[A-Z]|_|[a-z]|[\u00C0-\u00D6]|[\u00D8-\u00F6]|[\u00F8-\u02FF]|[\u0370-\u037D]|[\u037F-\u1FFF]|[\u200C-\u200D]|[\u2070-\u218F]|[\u2C00-\u2FEF]|[\u3001-\uD7FF]|[\uF900-\uFDCF]|[\uFDF0-\uFFFD]'''

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NameChar = NameStartChar + r'''|-|\.|[0-9]|\u00B7|[\u0300-\u036F]|[\u203F-\u2040]'''

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_xmlSymbol = "(" + NameStartChar + ")(" + NameChar + ")*"

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xmlSymbol = r(_xmlSymbol)

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aliasSymbol = r(r"-|(" + _xmlSymbol + r")")

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literal = [r(r'""".*?"""', re.S), r(r"'''.*?'''", re.S), r(r"""0x[a-f0-9]+|-?\d+\.\d*|-?\.\d+|-?\d+|".*?"|'.*?'""")]

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filename = [("'", r(r"[^']*"), "'"), ('"', r(r'[^"]*'), '"'), r(r"[^\s;]+")]

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ws = r(r"\s+", re.U)

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def pyExp():        return "!", r(r"(!=|\\!|[^!])+"), "!"

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value = [literal, pyExp]

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def tagQuote():     return r(r"\].*|\<.*?\>")

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def lineQuote():    return r(r"\|.*")

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def quote():        return [r(r"\d*>.*"), (literal, 0, [";", "."])]

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def parm():         return [([xmlSymbol, pyExp, pointer, macro], "=", [value, pointer, symbol]), value, pointer]

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def parm_eq():      return [xmlSymbol, pyExp, pointer, macro], "=", [value, pointer, symbol]

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parm_eq.__name__ = "parm"

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_func = [symbol, ppointer, pointer, reference], _if(newSyntax, (-1, ("[", listing(parm), "]"))), 0, ("(", listing(parm), ")"), 0, listing(parm), -1, parm_eq

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def pythonCall():   return keyword("python"), _func, [";", "."]

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def declParm():     return [pointer, macro, xmlSymbol], 0, ("=", [literal, symbol])

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def alias():        return keyword("alias"), aliasSymbol

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def descend():      return r(r"[+@*]" + _symbol, re.U)

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def base():         return keyword("is"), symbol

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def shape():        return symbol

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def decl():         return symbol, 0, base, 0, ("<", listing(shape), ">"), -1, descend, _if(newSyntax, (-1, ("[", 0, listing(declParm), "]"))), 0, ("(", 0, listing(declParm), ")"), 0, alias, 0, content

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def python():       return [r(r"!!.*?!!", re.S), r(r"!.*")]

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def operator():     return 0, keyword("define"), keyword("operator"), literal, keyword("as"), r(r".*")

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def constant():     return 0, keyword("define"), [pointer, symbol], "=", literal, 0, [";", "."]

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def in_ns():        return keyword("in"), xmlSymbol, [_decl, ("{", -2, _decl, "}")]

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_decl = keyword("decl"), listing(decl), [";", "."]

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def textsection():  return r(r'(\|\|(\>*)(.*?)\|\|(\>*))\s*$', re.S | re.M)

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def textsectionu(): return r(r'(\>\>.*?\>\>)', re.S)

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def include():      return keyword("include"), 0, reverse, 0, [ktext, kxml], filename, 0, [";", "."]

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def func():         return _func, 0, content

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def funclist():     return listing(func)

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_cmd = funclist, 0, [";", "."]

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_inner = [include, textsection, textsectionu, pythonCall, _cmd, quote, lineQuote, tagQuote, pyExp]

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_cc = "{", -1, _inner, "}"

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def content_plain(): return [ (_l, 0, _p, 0, _b, 0, _cc), (_p, 0, _b, 0, _cc), (_b, 0, _cc), _cc ]

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content_plain.__name__ = "content"

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def func_plain():   return _func, 0, content_plain

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func_plain.__name__ = "func"

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def flist_plain():  return -2, func_plain

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flist_plain.__name__ = "funclist"

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def xbase():        return flist_plain

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def generic():      return flist_plain

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def subscript():    return flist_plain

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def parentheses():  return "(", 0, funclist, ")"

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def fparm():        return flist_plain

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_l = _if(newSyntax, ("<", listing(generic), ">"))

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_p = _if(not newSyntax, parentheses), _if(newSyntax, ("(", 0, listing(fparm), ")"))

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_b = (":", listing(xbase))

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_c = [_inner, _cc]

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def content():      return [ (_l, 0, _p, 0, _b, 0, _c), (_p, 0, _b, 0, _c), (_b, 0, _c), _c ]

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def reverse():      return keyword("reverse")

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def ktext():        return keyword("text")

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def kxml():         return keyword("xml")

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def ymlCStyle():    return -1, [_decl, in_ns, include, python, operator, constant, tagQuote, lineQuote, quote, _cmd]