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yap-6.3/library/log2md.yap

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/**
* @file log2md.yap
* @author Vitor Santos Costa
*
*
*/
:- op(650,yfx, <-- ),
op(650,yfx, <-* ).
:- module( log2md,
[open_log/1,
log_title/1,
log_section/1,
log_subsection/1,
log_paragraph/1,
log_unit/2,
(<--)/2,
(<-*)/2,
log_goal/1,
log_goal/1 as log_clause,
out/1,
out/2,
outln/1,
outln/2] ).
:- use_module( library( maplist) ).
/**
*
*
* @defgroup Log2MD Log Output of Tests in Markdown format.
*
* @ingroup Regression System Tests
*
* These primitives support writing a user-specified log of execution to an
* output file. The output file can be used for testing or debugging.
*
* Primitives include the ability to write a title, a Prolog clause or
* goal, and hooks for tracing calls. The log_goal/2 can be used to
* start a goal. Arguments of the form `<--/2` and `*->/2` can be used to
* track calls.
*
* The output format is markdown.
*/
open_log(F) :-
open( F, write, _Out, [alias(log)]).
/**
* @pred log_title( +String ) is det
*
* @param [in] S is a Prolog atom or string describing a title.
*
*/
log_title( S ) :-
out( '## Report on ~a~n~n', [S]).
/**
* @pred log_section( +String ) is det
*
* @param [in] S is a Prolog atom or string describing a title.
*
*/
log_section( S ) :-
out( '### Report on ~a~n~n', [S]).
/**
* @pred log_section( +String ) is det
*
* @param [in] S is a Prolog atom or string describing a title.
*
*/
log_subsection( S ) :-
out( '#### Report on ~a~n~n', [S]).
/**
* @pred log_section( +String ) is det
*
* @param [in] S is a Prolog atom or string describing a title.
*
*/
log_paragraph( S ) :-
out( '##### Report on ~a~n~n', [S]).
/**
* @pred log_unit( +String, + Level ) is det
*
* @param [in] _String_ is a Prolog atom or string describing a title
* @param [in] _Level_ is an integer number larager than 1 (do notice that )
*large numbers may be ignored ).
*
*
*/
log_unit( S ) :-
out( '## Report on ~a~n~n', [S]).
/**
* @pred clause( +Term ) is det
*
* @param [in] Term is a Prolog clause or goal that it is going to
* be printed out using portray_clause/2.
*
*/
log_goal( DecoratedClause ) :-
take_decorations(DecoratedClause, Clause),
out( '~~~~~~~~{.prolog}~n'),
portray_clause( user_error , Clause ),
portray_clause( log , Clause ),
out( '~~~~~~~~~n', []).
take_decorations( G, G ) :-
var(G),
!.
take_decorations(_ <-- G, NG ) :-
!,
take_decorations( G, NG ).
take_decorations(_ <-* G, NG ) :-
!,
take_decorations( G, NG ).
take_decorations(G, NG ) :-
G =.. [F|Args],
maplist( take_decorations, Args, NArgs ),
NG =.. [F|NArgs].
:- meta_predicate ( + <-- 0 ),
( + <-* 0 ).
/**
* @pred log_goal( +Tag , :Goal )
*
* @param [in] evaluate goal _Goal_ with output before,
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* during and after the goal has been evaluated.
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*
*/
A <-* Goal :-
(
outln(A),
log_goal( Goal ),
call( Goal )
*->
out('succeded as~n'), log_goal(Goal)
;
out( 'failed~n'),
fail
).
/**
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* @pred `<--`( +Tag , :Goal )
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*
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* @param [in] output goal _Goal_ before and after being evaluated, but only
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* taking the first solution. The _Tag_ must be an atom or a string.
*
*/
Tag <-- Goal :-
(
outln(Tag),
log_goal( Goal ),
call( Goal )
->
out('succeded as~n'),
log_goal(Goal),
fail
;
out(failed)
).
/**
* @pred out(+Format, +Args)
*
* @param [in] format the string given Args . The output is sent to
* user_error and to a stream with alias `log`;
*
*/
out(Format, Args) :-
format( log, Format, Args),
format( user_error, Format, Args).
out(Format) :-
format( log, Format, []),
format( user_error, Format, []).
outln(Format, Args) :-
out(Format, Args), out('~n').
outln(Format) :-
out(Format), out('~n').