3.2.8 Conditional Evaluation

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3.2.8 Conditional Evaluation

$if(condition){true clause}{false clause}

Conditional evaluation will resolve to its true clause if

condition is a non-empty character sequence other than 0 or false
condition is a non-empty variable that does not resolve to 0 or false
condition is a variable that evaluates to true (implicit by previous condition)

Conditional evaluation will resolve to its false clause if

condition is empty
condition is 0 or false
condition is a variable that is empty or evaluates to 0 or false

Note:
Please do note that neither the variable syntax variants %if(...) nor $(if)(...) are supported for this construct.

Example

For example if you are using several platforms and you want to set different parameters depending on the operating system. In the following code the script commands of [[ ]] are evaluated and the <command> will be executed. This could be useful in a post-built step.

[[ if (PLATFORM == PLATFORM_MSW) { print (_T("cmd /c")); } else { print (_T("sh ")); } ]] <command>

[Previous] 3.2.7 Operating System Commands
[Next] 3.3 Script expansion

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