python-like pseudocode for marks that implement
| # Implementation of a mark that precludes gpl license | |
| class no_gpl: mark | |
| propagation = propagation_types.called_code or propagation_types.contained_code | |
| # Override mark.can_bind(). Return reason why binding is | |
| # impossible, or None on success. | |
| def can_bind(site, attachment): | |
| if attachment == mark_types.explicit_affirmative: | |
| if site.type.scope >= scope_types.code_block: | |
| if site.get_call_tree().is_marked('gpl', mark_types.explicit_affirmative): | |
| return "Is not compatible with GPL'ed code: %s" % site.get_url() | |
| return "Can only bind to code blocks or broader constructs." | |
| # Implementation of the mark for a gpl license | |
| class gpl: mark | |
| propagation = propagation_types.contained_code | |
| def can_bind(site): | |
| if attachment == mark_types.explicit_affirmative: | |
| if site.type.scope < scope_types.code_block: | |
| return "Can only bind to code blocks or broader constructs." |
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