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Difference between revisions of "EDT:Writing statements"
(New page: EGL provides general statements, as well as "action statements" that are used for interacting with an external data source. General statements Case The case statement never runs more th...) |
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| − | EGL provides general statements, as well as | + | EGL provides general statements, as well as statements that are used for interacting with an external data source. |
| − | General statements | + | = General statements = |
| − | Case | + | == Case == |
The case statement never runs more than one clause: | The case statement never runs more than one clause: | ||
| − | * The first form of the statement tests a criterion value. The following example invokes <code>mySecondFunction</code> if the field value is 2, 3, or 4: | + | *The first form of the statement tests a criterion value. The following example invokes <code>mySecondFunction</code> if the field value is 2, 3, or 4: |
<source lang="java">case (myRecord.requestID) | <source lang="java">case (myRecord.requestID) | ||
| Line 17: | Line 17: | ||
myDefaultFunction(); | myDefaultFunction(); | ||
end | end | ||
| − | </source> | + | </source> |
| − | * The second form of the statement executes the first clause that resolves to true. | + | *The second form of the statement executes the first clause that resolves to true. The following example displays only "x passes": |
<source lang="java"> | <source lang="java"> | ||
Revision as of 12:03, 13 February 2012
EGL provides general statements, as well as statements that are used for interacting with an external data source.
General statements
Case
The case statement never runs more than one clause:
- The first form of the statement tests a criterion value. The following example invokes
mySecondFunctionif the field value is 2, 3, or 4:
case (myRecord.requestID) when (1) myFirstFunction(); when (2, 3, 4) mySecondFunction(); otherwise myDefaultFunction(); end
- The second form of the statement executes the first clause that resolves to true. The following example displays only "x passes":
function test() x INT = 3; y INT = 5; z INT = 7; case when (x == 3) SysLib.writeStdOut("x passes"); when (y == 5) SysLib.writeStdOut("y passes"); when (z == 7) SysLib.writeStdOut("z passes"); otherwise SysLib.writeStdErr("You will not see this message."); end end end