steve@sdcrdcf.UUCP (Steven Holtsberg) (02/05/86)
Two Questions: (1) In the reference manual, on page 8-10, it says that overloading is defined for subprograms, enumeration literals, operators, and single entries However, I do not know what "single entries" are, and I cannot find a definition in the manual. Does anyone know the definition of a "single entry"? (2) On page 3-20 of the reference manual, the canonical form for any floating point number other than zero is given as sign * mantissa * (radix ** exponent) My question: Why is radix given as a parameter? Isn't the radix, by definition, two?
markb@sdcrdcf.UUCP (Mark Biggar) (02/05/86)
In article <2608@sdcrdcf.UUCP> steve@sdcrdcf.UUCP (Steven Holtsberg) writes: >(1) In the reference manual, on page 8-10, it says that overloading >is defined for subprograms, enumeration literals, operators, and single entries > >However, I do not know what "single entries" are, and I cannot >find a definition in the manual. > >Does anyone know the definition of a "single entry"? I took this to mean that a tasks entires can be overloaded independently and not as a group. >(2) On page 3-20 of the reference manual, the canonical form for >any floating point number other than zero is given as > >sign * mantissa * (radix ** exponent) > >My question: Why is radix given as a parameter? >Isn't the radix, by definition, two? NO, the radix of a floating constant is programmer specifiably. The default for a constant like 1.3E-3 is radix 10, but if you say constant value 16#E.0#E1 14*(16**1)=224.0 2#1.1111_1111_111#E11 1.1111_1111_111 *(2**11) = 4095.0 base 2 The radix of the internal representation for FLOAT constants is implementation defined. Mark Biggar {allegra,burdvax,cbosgd,hplabs,ihnp4,akgua,sdcsvax}!sdcrdcf!markb
rgenter@BBN-LABS-B.ARPA (02/10/86)
In message <2608@sdcrdcf.UUCP>, Steven Holtsberg <sdcsvax!sdcrdcf!steve@ucbvax.berkeley.EDU> writes: > Two Questions: > (1) In the reference manual, on page 8-10, it says that overloading > is defined for subprograms, enumeration literals, operators, and single entries > However, I do not know what "single entries" are, and I cannot > find a definition in the manual. > Does anyone know the definition of a "single entry"? > (2) On page 3-20 of the reference manual, the canonical form for > any floating point number other than zero is given as > sign * mantissa * (radix ** exponent) > My question: Why is radix given as a parameter? > Isn't the radix, by definition, two? No. On IBM-370s and their lookalikes, for example, it is 16. -------- Rick Genter BBN Laboratories Inc. (617) 497-3848 10 Moulton St. 6/506 rgenter@labs-b.bbn.COM (Internet new) Cambridge, MA 02238 rgenter@bbn-labs-b.ARPA (Internet old) ...!{decvax,linus}!bbncca!rgenter (UUCP)
rose@Shasta.ARPA (02/10/86)
In article <2608@sdcrdcf.UUCP> steve@sdcrdcf.UUCP (Steven Holtsberg) writes: > >Does anyone know the definition of a "single entry"? Task entries can be either single entries or members of an entry family. Thus, entry family members CANNOT be overloaded. This should answer your question. My favorite undefined buzzphrase in the LRM is "unconstrained types with discriminants," which I eventually found out includes not only discriminated record types, but also private types with a discriminant part (whose full type declaration must thus be a record type). -- David.