A.40 library(prolog_xref): Prolog cross-referencer data collection
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  • Documentation
    • Reference manual
      • The SWI-Prolog library
        • library(prolog_xref): Prolog cross-referencer data collection
          • called_by/4
          • called_by/2
          • meta_goal/2
          • hook/1
          • xref_source/1
          • xref_source/2
          • xref_clean/1
          • xref_current_source/1
          • xref_done/2
          • xref_called/3
          • xref_called/4
          • xref_called/5
          • xref_defined/3
          • xref_definition_line/2
          • xref_exported/2
          • xref_module/2
          • xref_uses_file/3
          • xref_op/2
          • xref_prolog_flag/4
          • xref_comment/3
          • xref_comment/4
          • xref_mode/3
          • xref_option/2
          • xref_meta/3
          • xref_meta/2
          • xref_meta_src/3
          • xref_hook/1
          • xref_public_list/3
          • xref_public_list/4
          • xref_public_list/6
          • xref_public_list/7
          • xref_source_file/3
          • xref_source_file/4
    • Packages
Availability::- use_module(library(prolog_xref)).
Source[semidet]xref_meta(+Head, -Called)
[semidet]xref_meta_src(+Head, -Called, +Src)
True when Called is a list of terms called from Head. Each element in Called can be of the form Term+Int, which means that Term must be extended with Int additional arguments. The variant xref_meta/3 first queries the local context.
deprecated
New code should use xref_meta/3.
To be done
- Split predifined in several categories. E.g., the ISO predicates cannot be redefined.
- Rely on the meta_predicate property for many predicates.