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109 lines
4.9 KiB
Python
109 lines
4.9 KiB
Python
7 years ago
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# YML 2.5.3 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 = ur''':|[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 + ur'''|-|\.|[0-9]|\u00B7|[\u0300-\u036F]|[\u203F-\u2040]'''
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_xmlSymbol = u"(" + NameStartChar + u")(" + NameChar + u")*"
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xmlSymbol = r(_xmlSymbol)
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aliasSymbol = r(ur"-|(" + _xmlSymbol + ur")")
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literal = [r(r'""".*?"""', re.S), r(r"'''.*?'''", re.S), r(r"""-?\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)
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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'(\|\|(\>*).*?\|\|(\>*))|(\>\>.*?\>\>)', 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, 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]
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