Program functions can be declared as partial with "let/val partial".
Similarly to "diverges", partial code cannot be ghost, however it does not need to be
explicitly specified as partial.
Fixes#184.
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.
This commit removes all hard-coded "infix ..", "prefix ..",
and "mixfix .." from the rest of the code, and handles the
symbolic notation entirely inside Ident. It does not change
the notation itself.
Forces aliasing between the arguments, external reads and the
result (denoted "result"). Cannot be used for exceptional results.
Currently, is only used for "any" and "val", and is silently ignored
otherwise.
