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    • Fonenantsoa Maurica 's avatar
      Extend Interval, Typing and Translate: · ad8d968c
      Fonenantsoa Maurica authored
        - Interval:
          - Not_an_integer -> Is_a_real|Not_a_number.
          - infer -> infer_with_real
            because Not_a_number has priority over Is_a_real
          - Ival.bottom when Is_a_real
            because the interval is for integers
        - Typing:
          - integer_ty -> number_ty=Cty|Gmpz|Libr|Nan
          - Other -> 'Other (Oreal|Onan)'
        - Translate:
          Encode real constants into strings:
            - **NO** conversion to float-point type
            - strnum_ty=StrZ|StrR|Not_a_strnum
              for tracking the type of the string
      Add Libr:
        - Gmpz -> Gmp=Gmpz+Gmpq
        - Libr=ref to Gmpq
      Add Gmpq builtins:
        - Custom mini-gmp -> libgmp
          because mini-gmp has no support for Q
        - Add arithmetic over Q in e_acsl_gmp_api.h
      Misc:
        - dec_to_frac: decimal expansion to fractional representation
          because decimal expansion is interpreted as double by Gmpq
      Tests:
        - BTS 1307 has an assertion wrongly evaluated, fixed
        - Add tests/gmp/reals.c
      THE MOST IMPORTANT TODO:
        - Completely hide the library for numbers (currently Gmp)
          inside Libr: Typing, Env and Translate should only know
          Libr and never directly call Gmp.
          This is crucial for extending E-ACSL in the future
          (eg: Gmp has no support for elementary functions), and
          also for using it as part of an abstract compiler
          (eg: with Fldlib)
          For the time being, in Translate,
          we have something as ugly as:
            let init_set =
              if Libr.is_t ty then Libr.init_set
              else Gmp.init_set
      ad8d968c
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