Class: Switch

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • cases
  • evaluation
  • initialization

Inheritance:

   Object
   |
   +--Switch

Package:

stx:libcomp

Category:

Programming-Support

Version:

rev: 1.6 date: 1996/11/11 21:54:08

user: stefan

file: Switch.st directory: libcomp

module: stx stc-classLibrary: libcomp

Description:

This class provides a switch-expression facility.
Consider this a demo example, nested if's are much more
efficient. However, support for inline switches may be added
to the compiler (as is done in Smalltalk-agents)
- in this case, a switch will be as efficient as any other if.

Beta Testers: Let me know if such a facility is useful and/or needed ...

example:

   |a b|

   a := 1.
   b := 2.

   (Switch new)
       if:[a > b] then:['a is greater than b'];
       if:[a < b] then:['a is less than b'];
       otherwise:['a same as b'];
       value
    

Class protocol:

 new

Instance protocol:

 if: expr then: block

 otherwise: block

 value

 initialize