Re: [boost] Boost Units library preview

From: Eric Lemings (lemings_at_[hidden])
Date: 2006-08-17 18:12:20

> -----Original Message-----
> From: boost-bounces_at_[hidden] 
> [mailto:boost-bounces_at_[hidden]] On Behalf Of Andy Little
> Sent: Thursday, August 17, 2006 3:50 PM
> To: boost_at_[hidden]
> Subject: Re: [boost] Boost Units library preview
> 
> 
...
> -----------
> output:
> 
> E:\projects\Test>testgcc
> quan qft.numeric_value() = 3
> boost.units ft1.value() = 3
> assertion "f1.value() == 3" failed: file "test.cpp", line 17
>       6 [sig] testgcc 3984 open_stackdumpfile: Dumping stack 
> trace to testgcc.ex e.stackdump
>   33204 [sig] testgcc 3984 E:\projects\Test\testgcc.exe: *** 
> fatal error - E:\pr
> ojects\Test\testgcc.exe: *** called with threadlist_ix -1

In the Units library, the default value type is (currently) double
and the semantics of all arithmetic operations are based on this
built-in type.  No assumptions are made about semantics, only that
the required operations exist for ValueType.

What is the default value type in Quan?  I'm guessing it has
something to do with a united value or some other manipulation
of value semantics within Quan?

Also be careful of literal values and promotions.  3 is an integer,
3.0 is a double, 3L is a long, 3LL is a long long, etc.

Eric.