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ENH: fix documentation and add docs on parenthetical expressions

This commit is contained in:
Ken Martin 2009-02-12 12:50:12 -05:00
parent 3d0e241498
commit 4f369610f5
1 changed files with 12 additions and 5 deletions
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15
Source/cmIfCommand.h
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@ -118,9 +118,10 @@ public:
"in the THEN section are invoked. Otherwise, the commands in the " "in the THEN section are invoked. Otherwise, the commands in the "
"else section are invoked. The elseif and else sections are " "else section are invoked. The elseif and else sections are "
"optional. You may have multiple elseif clauses. Note that " "optional. You may have multiple elseif clauses. Note that "
"the same expression must be given to if, and endif. Long " "the expression in the else and endif clause is optional. Long "
"expressions can be used and the order or precedence is that the " "expressions can be used and there is a traditional order of precedence. "
"EXISTS, COMMAND, and DEFINED operators will be evaluated first. " "Parenthetical expressions are evaluated first followed by unary operators "
"such as EXISTS, COMMAND, and DEFINED. "
"Then any EQUAL, LESS, GREATER, STRLESS, STRGREATER, STREQUAL, MATCHES " "Then any EQUAL, LESS, GREATER, STRLESS, STRGREATER, STREQUAL, MATCHES "
"will be evaluated. Then NOT operators and finally AND, OR operators " "will be evaluated. Then NOT operators and finally AND, OR operators "
"will be evaluated. Possible expressions are:\n" "will be evaluated. Possible expressions are:\n"
@ -182,7 +183,13 @@ public:
"major[.minor[.patch[.tweak]]]).\n" "major[.minor[.patch[.tweak]]]).\n"
" if(DEFINED variable)\n" " if(DEFINED variable)\n"
"True if the given variable is defined. It does not matter if the " "True if the given variable is defined. It does not matter if the "
"variable is true or false just if it has been set."; "variable is true or false just if it has been set.\n"
" if((expression) AND (expression OR (expression)))\n"
"The expressions inside the parenthesis are evaluated first and then the remaining "
"expression is evaluated as in the previous examples. Where there are nested "
"parenthesis the innermost are evaluated as part of evaluating the expression "
"that contains them."
;
} }
// this is a shared function for both If and Else to determine if the // this is a shared function for both If and Else to determine if the