D Documentation  
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  1. Introduction
    1. A simple tutorial
    2. Switching to D
    3. An advanced tutorial
  2. Language Reference
    1. General syntax
    2. Statements
    3. Types
    4. Error Handling
    5. Memory Management
  3. Std. runtime library (Phobos)
    1. std.base64
    2. std.boxer
      1. Box
        1. T unbox!(T)(Box value)
      2. UnboxException
    3. std.compiler
    4. std.conv
    5. std.ctype
    6. std.date
    7. std.file
    8. std.format
    9. std.gc
    10. std.intrinsic
    11. std.math
    12. std.md5
    13. std.mmfile
    14. std.outbuffer
    15. std.path
    16. std.process
    17. std.random
    18. std.recls
    19. std.regexp
    20. std.socket
    21. std.socketstream
    22. std.stdint
    23. std.stdio
    24. std.stream
    25. std.string
    26. std.system
    27. std.thread
    28. std.uri
    29. std.utf
    30. std.zip
    31. std.zlib
  4. Libraries and Tools
    1. mango
    2. Build
  5. Related Links
  6. About this documentation
T unbox!(T)(Box value)
Prototype:
T unbox!(T)(Box value)


This template function converts a boxed value into the provided type. To use it, instantiate the template with the desired result type, and then call the function with the box to convert.

This will implicitly cast base types as necessary and in a way consistent with static types - for example, it will cast a boxed byte into int, but it won't cast a boxed float into short. If it cannot cast, it throws UnboxException.

Example:
Box b = box(4.5);
bit u = unboxable!(real)(b); // This is true.
real r = unbox!(real)(b);
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