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