Conditional structures/ALGOL 68: Difference between revisions
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PROC do_something = INT: random; |
PROC do_something = INT: random; |
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PROC do_something_else = INT: random; |
PROC do_something_else = INT: random; |
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input := (TRUE | do_something | do_something_else); # only calls |
input := (TRUE | do_something | do_something_else); # only calls do_something() # |
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)</lang> |
)</lang> |
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The "( ~ | ~ | ~ )" is directly interchangeable with the "IF ~ THEN ~ ELSE ~ FI" syntax. Hence the above could be written: |
The "( ~ | ~ | ~ )" is directly interchangeable with the "IF ~ THEN ~ ELSE ~ FI" syntax. Hence the above could be written: |
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PROC do_something = INT: random; |
PROC do_something = INT: random; |
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PROC do_something_else = INT: random; |
PROC do_something_else = INT: random; |
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input := IF TRUE THEN do_something ELSE do_something_else FI; # only calls |
input := IF TRUE THEN do_something ELSE do_something_else FI; # only calls do_something() # |
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)</lang> |
)</lang> |
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A more complex example created by combining the above: |
A more complex example created by combining the above: |
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CASE 2 IN x,y OUT z ESAC := IF 1+2=2 THEN 333 ELSE 666 FI |
CASE 2 IN x,y OUT z ESAC := IF 1+2=2 THEN 333 ELSE 666 FI |
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)</lang> |
)</lang> |
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In the result y becomes |
In the result y becomes fully-evil, with x and z remaining undefined. |
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