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It is possible to append an arbitary number of quote symbols
at the end of an prefix/infix/mixfix operator:

            applied form      standalone form

              -' 42               (-'_)
              x +' y              (+')
              a[0]' <- 1          ([]'<-)

Pretty-printing will use the quote symbols for disambiguation.

The derived symbols can be produced by Why3 by appending
a suffix of the form "_toto" or "'toto". These symbols can
be parsed/printed as "(+)_toto" or "(+)'toto", respectively.

Incidentally, this also helps with (*)

this avoids handling LEFTPAR_STAR_RIGHTPAR in the parser

  use it for converting ComputerDivision to EuclideanDivision

(cherry picked from commit 903a0b53)

* declare range types and float types,
* use integer (resp. real) literals for those types through casting,
* specify how to print them in drivers.

Change in syntax
* use

  type t = < range 1 2 >   (* integers from 1 to 2 *)
  type t' = < float 4 12 > (* float with 4 bits in exponent and 12 in mantissa *)

  the two projections :
  t'int
  t''real

  and the predicate :
  t''isFinite

* Restrict the use of "'" in whyml:
  Users are not allowed to introduce names where a quote symbol
  is followed by a letter. Thus, the following identifiers are
  valid:

  t'
  toto'0''
  toto'_phi

  whereas toto'phi is not.

Note: we do not yet support negative numbers in range declaration
and casting of a literal.

axioms with a single "remove allprops".

use remove allprops in the driver for bitvectors.

To do so, add "overriding" keyword in front of "syntax" in the driver file as in, e.g.,
  overriding syntax function to_uint "(bv2int %1)"

One can only have one overriding for a specific function/type.

+ fixed wrong step limit in one session

Parsing a model returned by the solver -  added possibility to specify the parser of model in the driver.

It is now done by a different mechanism than parsing of time:
timeregexp is not any more used for parsing of steps, stepsregexp is
used instead.

- move common lexing functions to util/lexlib.mll
- move and rename Typing.create_user_tv to Ty.tv_of_string

support for 31/32/63/64-bit integers in extracted code

remove the keyword "cloned" from drivers, since it becomes
the default and only behaviour (the same for prelude strings).

Also, remove obsolete Printer.print_prelude_for_theory.

+ create AUTHORS file
+ fix the linking exception in LICENSE
+ update the "About" in IDE
+ remove the trailing whitespace
+ inflate my scores at Ohloh