conditional.f90

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Data Types
type	cond_state
	State of a single conditional block. More...

Functions/Subroutines
logical function, public	is_active ()
	Determine if current line is inside an active conditional block.
subroutine, public	handle_if (ctx, macros, token)
	Process a if directive with constant expression evaluation Evaluates the expression after if using evaluate_expression() and pushes a new state onto the conditional stack.
subroutine, public	handle_ifdef (ctx, macros, token)
	Process ifdef – test if a macro is defined.
subroutine, public	handle_ifndef (ctx, macros, token)
	Process ifndef – test if a macro is NOT defined.
subroutine, public	handle_elif (ctx, macros, token)
	Process elif – alternative branch after if/elif Only activates if no previous branch in the group was taken.
subroutine, public	handle_elifdef (ctx, macros, token)
	Process elifdef – test if a macro is defined.
subroutine, public	handle_elifndef (ctx, macros, token)
	Process elifndef – test if a macro is not defined.
subroutine, public	handle_else (ctx)
	Process else – final fallback branch Activates only if no previous if/elif branch was true.
subroutine, public	handle_endif (ctx)
	Process endif – end of conditional block Pops the top state from the stack. Reports error on unmatched endif.

Variables
type(cond_state), dimension(max_cond_depth), public	cond_stack
	Global stack of conditional states (depth-limited).
integer, public	cond_depth = 0
	Current nesting depth of conditional directives (0 = outside any if).