The compiler maintains a list of defined symbols, which can be defined using !define or the /D command line switch. These defined symbols can be used for conditional compilation (using !ifdef) or for symbol replacement (a simple form of macros). To replace a symbol with its value, use $\{SYMBOL\} (if SYMBOL is not defined, no translation will occur). The translation is first-come-first-served, meaning if you do:
This command will add \e{gflag} to the global define list. This will have a similar effect as using the /D switch on the command line (only the define only becomes effective after the !define command).
If \e{/date} or \e{/utcdate} are used, \e{value} will be passed into strftime and the result will be used as the value of \e{gflag}. strftime converts special symbols into certain parts of the current time or date. For example, %H will be converted into the current hour in 24-hour format. For a complete list of available symbols, search for strftime on \W{http://msdn.microsoft.com/}{MSDN}. On POSIX, you can get the list by using \c{man strftime}.
If \e{/math} is used, the result of 'val1 OP val2', where OP may be +,-,*,/ or % , will be used as the value of \e{gflag}. Note that val1 AND val2 MUST be integer values!
This command, when paired with an !endif command, will tell the compiler whether or not to compile the lines in between the two lines. If gflag is globally defined (using !define or the /D switch), then the contained lines will be compiled. Otherwise, they will be skipped. 'bcheck' can be specified as & (boolean and) or | (boolean or) along with more gflags -- precedence is simple, left to right.
This command, when paired with an !endif command, will tell the compiler whether or not to compile the lines in between the two lines. If value is non-zero, or the comparison of value and value2 depending on the operator results in true, the contained lines will be compiled. Otherwise, they will be skipped.
op can be either == or != (string comparison), <=, < > or >= (float comparison), && or || (boolean comparison).
If [!] is set, return value will be switched from true to false and vice versa.
This command, when paired with an !endif command, will tell the compiler whether or not to compile the lines in between the two lines. If the macro gflag exists, then the contained lines will be compiled. Otherwise, they will be skipped. 'bcheck' can be specified as & (boolean and) or | (boolean or) along with more gflags -- precedence is simple, left to right.
This command allows to easily insert different code when different defines or macros are set. You can create blocks like !ifdef/!else/!endif, !ifdef/!else ifdef/!else/!endif etc.
Inserts the contents of a macro that was created with !macro. If the macro was created with parameters, then you must pass as many parameters to the macro as it requires.
Creates a macro named 'macro_name'. All lines between the !macro and the !macroend will be saved. To insert the macro later on, use !insertmacro. !macro definitions can have one or more parameters defined. The parameters may be accessed the same way a !define would (e.g. $\{PARMNAME\}) from inside the macro.
