def grammar(self):
""" Define the parser grammar.
"""
# Ignore TeX commands between delimiters $$, \(, \)
tex_eq = (Literal(r'\(') | Literal(r'$$') | Literal(r'\[')) + ... + (
Literal(r'\)') | Literal(r'$$') | Literal(r'\]'))
# Define elemtary stuff
leftAc = Literal('{').suppress()
rightAc = Literal('}').suppress()
lpar = Literal('(')
rpar = Literal(')')
integer = Word(nums) # simple unsigned integer
real = Regex(r"[+-]?\d+(:?\.\d*)?(:?[eE][+-]?\d+)?")
real.setParseAction(self.real_hook)
number = real | integer
# Define function
fnname = Word(alphas, alphanums + "_")('name')
# Require expr to finalize the def
function = Forward()
function.setParseAction(self.function_hook)
# What are the namming rule for the jocker? Need to start by a letter,
# may contain almost everything
variable = Combine(leftAc + Word(alphas, alphanums + "_") +
rightAc)('name')
variable.setParseAction(self.variable_hook)
variable.ignore(tex_eq)
# arithmetic operators
minus = Literal('-')
arithOp = oneOf("+ * /") | minus
equal = Literal('{=').suppress()
# Require atom to finalize the def
expr = Forward()
# Define atom
atom = number | (0, None) * minus + (Group(lpar + expr + rpar)
| variable | function)
atom.setParseAction(self.atom_hook)
# Finalize postponed elements...
expr << atom + ZeroOrMore(arithOp + atom)
# Need to group arguments for swapping them
function << fnname + Group(lpar + Group(ZeroOrMore(expr)) +
Optional(Literal(',') + Group(expr)) + rpar)
# Define equation
equation = equal + expr + rightAc
equation.setParseAction(self.equation_hook)
return equation, variable
char_arr_deck = (
name_of_deck("key")
+ Literal("C")("type")
+ Literal("N=").suppress()
+ integer("size")
+ LineEnd().suppress()
+ Group(SkipTo(LineEnd() + name_of_deck + data_type) | SkipTo(StringEnd()))("value")
)
real_arr_deck = (
name_of_deck("key")
+ Literal("R")("type")
+ Literal("N=").suppress()
+ integer("size")
+ LineEnd().suppress()
+ Group(real.ignore("\n")[...])("value")
)
int_arr_deck = (
name_of_deck("key")
+ Literal("I")("type")
+ Literal("N=").suppress()
+ integer("size")
+ LineEnd().suppress()
+ Group(integer.ignore("\n")[...])("value")
)
# fchck file header
# ------------------------------------------------------------------------------------------
title = (LineStart() + SkipTo(LineEnd())).setParseAction(lambda x: "".join(x).strip())
details = LineStart() + OneOrMore(Word(printables))
header = Group(
