- log.logging()-context manager. Log dir's will not be created before needed any more

examples/ArithmeticExperimental/ArithmeticExperimental.ebnf

@@ -42,7 +42,7 @@ div         = factor "/" term
 #######################################################################
 
 factor      = [sign] ([element] tail | element) ~
-tail        = seq | tail_elem
+tail        = (seq | tail_elem) [imaginary]
 seq         = tail_elem tail
 sign        = PLUS | MINUS
 
@@ -58,7 +58,7 @@ pow         = value `^` [sign] element
 value       = (number | tail_value) [imaginary]
 
 tail_elem   = tail_pow | tail_value
-tail_pow    = tail_value `^` pow
+tail_pow    = tail_value [imaginary] `^` element
 tail_value  = special | function | VARIABLE | group
 group       = `(` §expression `)`
 

examples/ArithmeticExperimental/ArithmeticExperimentalCompiler.py

@@ -60,11 +60,10 @@ class ArithmeticExperimentalGrammar(Grammar):
     """
     element = Forward()
     expression = Forward()
-    pow = Forward()
     sign = Forward()
     tail = Forward()
     term = Forward()
-    source_hash__ = "275cee2bc98d92d9330bcc71dde3afe3"
+    source_hash__ = "01e521bb6dbca853cb7eef515c2dc8d7"
     static_analysis_pending__ = [True]
     parser_initialization__ = ["upon instantiation"]
     resume_rules__ = {}
@@ -88,14 +87,14 @@ class ArithmeticExperimentalGrammar(Grammar):
     function = Alternative(sin, cos, tan, log)
     group = Series(DropToken("("), expression, DropToken(")"), mandatory=1)
     tail_value = Alternative(special, function, VARIABLE, group)
-    tail_pow = Series(tail_value, DropToken("^"), pow)
+    tail_pow = Series(tail_value, Option(imaginary), DropToken("^"), element)
     tail_elem = Alternative(tail_pow, tail_value)
     value = Series(Alternative(number, tail_value), Option(imaginary))
-    pow.set(Series(value, DropToken("^"), Option(sign), element))
+    pow = Series(value, DropToken("^"), Option(sign), element)
     element.set(Alternative(pow, value))
     sign.set(Alternative(PLUS, MINUS))
     seq = Series(tail_elem, tail)
-    tail.set(Alternative(seq, tail_elem))
+    tail.set(Series(Alternative(seq, tail_elem), Option(imaginary)))
     factor = Series(Option(sign), Alternative(Series(Option(element), tail), element), dwsp__)
     div = Series(factor, Series(DropToken("/"), dwsp__), term)
     mul = Series(factor, Series(DropToken("*"), dwsp__), term)