Visibility & Output-Mode Directives

#pre / #post

#pre and #post used to be tied to the WPF calculate/don't-calculate phases. In Calcpad.Web, changes to the input form calculates the document, so these directives were re-purposed for a similar usage.

• #pre — shows on the input form, hides when printing/exporting to the report PDF.
• #post — shows in the report, but not the input form.

#pre
'These lines are visible in the input form but excluded from the report PDF.
debug_x = 5
debug_y = debug_x + 1
#end pre
'This always prints.

Optional condition argument

#hide, #show, #pre, #post, #val, #equ, #noc, #varsub, #nosub, and #novar each optionally take a trailing condition, evaluated the same way #if evaluates one:

#hide x == 5
'Hidden only when x equals 5.

• No condition → the directive always applies.
• A bad expression records an error and leaves state unchanged.

#end forms restore prior state

Every directive in these three groups can be closed with #end <directive>, which pops back to whatever state was in effect before the matching opener (or the default state if there was none):

• Visibility: #end hide, #end show, #end pre, #end post
• Output mode: #end val, #end equ, #end noc
• Substitution: #end varsub, #end nosub, #end novar

This lets a macro change a state temporarily without leaking it to the caller:

#pre
'On screen only.
#hide
'Hidden.
#end hide
'Back to #pre state.
#end pre
'Back to the default #show state.