>b's YML 2
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# YML 2.7.0 language definition
# written by VB.
import re
from .pyPEG import keyword, _and, _not
# pyPEG:
#
# basestring: terminal symbol (characters)
# keyword: terminal symbol (keyword)
# matchobj: terminal symbols (regex, use for scanning symbols)
# function: named non-terminal symbol, recursive definition
# if you don't want naming in output, precede name with an underscore
# tuple: production sequence
# integer: count in production sequence:
# 0: following element is optional
# -1: following element can be omitted or repeated endless
# -2: following element is required and can be repeated endless
# list: options, choose one of them
# _not: next element in production sequence is matched only if this would not
# _and: next element in production sequence is matched only if this would, too
newSyntax = True
def oldSyntax():
global newSyntax
newSyntax = False
def _if(cond, val):
if cond:
return val
else:
return ()
def listing(x): return x, -1, (",", x)
r = re.compile
comment = [r(r"//.*"), r(r"/\*.*?\*/", re.S)]
_symbol = r"(?=\D)\w(\w|:)*"
symbol = r(_symbol, re.U)
pointer = r(r"\*" + _symbol, re.U)
ppointer = r(r"\*\*" + _symbol, re.U)
macro = r(r"\%" + _symbol, re.U)
reference = r(r"\&" + _symbol, re.U)
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]'''
NameChar = NameStartChar + r'''|-|\.|[0-9]|\u00B7|[\u0300-\u036F]|[\u203F-\u2040]'''
_xmlSymbol = "(" + NameStartChar + ")(" + NameChar + ")*"
xmlSymbol = r(_xmlSymbol)
aliasSymbol = r(r"-|(" + _xmlSymbol + r")")
literal = [r(r'""".*?"""', re.S), r(r"'''.*?'''", re.S), r(r"""0x[a-f0-9]+|-?\d+\.\d*|-?\.\d+|-?\d+|".*?"|'.*?'""")]
filename = [("'", r(r"[^']*"), "'"), ('"', r(r'[^"]*'), '"'), r(r"[^\s;]+")]
ws = r(r"\s+", re.U)
def pyExp(): return "!", r(r"(!=|\\!|[^!])+"), "!"
value = [literal, pyExp]
def tagQuote(): return r(r"\].*|\<.*?\>")
def lineQuote(): return r(r"\|.*")
def quote(): return [r(r"\d*>.*"), (literal, 0, [";", "."])]
def parm(): return [([xmlSymbol, pyExp, pointer, macro], "=", [value, pointer, symbol]), value, pointer]
def parm_eq(): return [xmlSymbol, pyExp, pointer, macro], "=", [value, pointer, symbol]
parm_eq.__name__ = "parm"
_func = [symbol, ppointer, pointer, reference], _if(newSyntax, (-1, ("[", listing(parm), "]"))), 0, ("(", listing(parm), ")"), 0, listing(parm), -1, parm_eq
def pythonCall(): return keyword("python"), _func, [";", "."]
def declParm(): return [pointer, macro, xmlSymbol], 0, ("=", [literal, symbol])
def alias(): return keyword("alias"), aliasSymbol
def descend(): return r(r"[+@*]" + _symbol, re.U)
def base(): return keyword("is"), symbol
def shape(): return symbol
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
def python(): return [r(r"!!.*?!!", re.S), r(r"!.*")]
def operator(): return 0, keyword("define"), keyword("operator"), literal, keyword("as"), r(r".*")
def constant(): return 0, keyword("define"), [pointer, symbol], "=", literal, 0, [";", "."]
def in_ns(): return keyword("in"), xmlSymbol, [_decl, ("{", -2, _decl, "}")]
_decl = keyword("decl"), listing(decl), [";", "."]
def textsection(): return r(r'(\|\|(\>*)(.*?)\|\|(\>*))\s*$', re.S | re.M)
def textsectionu(): return r(r'(\>\>.*?\>\>)', re.S)
def include(): return keyword("include"), 0, reverse, 0, [ktext, kxml], [(kpointer, pointer), filename], 0, [";", "."]
def func(): return _func, 0, content
def funclist(): return listing(func)
_cmd = funclist, 0, [";", "."]
_inner = [include, textsection, textsectionu, pythonCall, _cmd, quote, lineQuote, tagQuote, pyExp]
_cc = "{", -1, _inner, "}"
def content_plain(): return [ (_l, 0, _p, 0, _b, 0, _cc), (_p, 0, _b, 0, _cc), (_b, 0, _cc), _cc ]
content_plain.__name__ = "content"
def func_plain(): return _func, 0, content_plain
func_plain.__name__ = "func"
def flist_plain(): return -2, func_plain
flist_plain.__name__ = "funclist"
def xbase(): return flist_plain
def generic(): return flist_plain
def subscript(): return flist_plain
def parentheses(): return "(", 0, funclist, ")"
def fparm(): return flist_plain
_l = _if(newSyntax, ("<", listing(generic), ">"))
_p = _if(not newSyntax, parentheses), _if(newSyntax, ("(", 0, listing(fparm), ")"))
_b = (":", listing(xbase))
_c = [_inner, _cc]
def content(): return [ (_l, 0, _p, 0, _b, 0, _c), (_p, 0, _b, 0, _c), (_b, 0, _c), _c ]
def reverse(): return keyword("reverse")
def ktext(): return keyword("text")
def kxml(): return keyword("xml")
def kpointer(): return keyword("pointer")
def ymlCStyle(): return -1, [_decl, in_ns, include, python, operator, constant, tagQuote, lineQuote, quote, _cmd]