[Issue 3758] New: Create D impementation of to!(float, string), etc.

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3758

           Summary: Create D impementation of to!(float, string), etc.
           Product: D
           Version: 2.040
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: performance
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: dsimcha at yahoo.com


--- Comment #0 from David Simcha <dsimcha at yahoo.com> 2010-01-31 08:14:15 PST ---
std.conv calls the c functions atof, atod, atold, etc. for to!(float, string),
to!(double, string), and to!(real, string) respectively.  There are two
practical reasons why we need D implementations of these functions:

1.  Strings should be convertible to floats at compile time.
2.  To make the input string compatible with C, it is copied using toStringz. 
This is inefficient, especially when trying to real large files with ASCII
numbers in and convert the ASCII numbers to floats.

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