Estimated hours taken: 26
Implement the following improvements:
- Pass mdb variable bindings to the interactive query processor,
allowing queries to make use of live values.
- Catch exceptions thrown by queries, rather than crashing mdb.
- Write outputs using io.write_cc/3.
- Don't output underscore variables, avoiding spurious warnings.
- More protection of the user's namespace.
- Updated the cleanup code.
browser/interactive_query.m:
The interface now accepts corresponding lists of names and values,
which are matched up with variables occurring in the queries.
Replace the code generator with one that supports passing data
to and from the query, and catching exceptions from the query.
Pass the appropriate data at the time the query predicate is called.
Distinguish between failure of the query and failure of the dynamic
casts used to instantiate the query inputs.
Use module qualifiers to avoid clashing with user imports. (Should the
generated code use use_module, just in case?)
Perform I/O, failure handling and exception handling in the caller
instead of in the generated code. This is faster, more maintainable,
and means that errors are caught earlier.
Place source_file and line directives more carefully so as to ensure
more consistent error messages, and to help distinguish errors in the
template from errors in the query.
Factor out the query command parser to avoid double maintenance.
browser/debugger_interface.m:
Conform to above changes.
trace/mercury_trace_vars.[ch]:
Export MR_trace_return_bindings, which constructs Mercury lists
of the variable names and values in the current environment.
trace/mercury_trace_browse.c:
Pass bindings from trace/mercury_trace_vars through to the interactive
query processor.
tests/debugger/interactive.{m,inp,exp}:
Update for changes to existing functionality. Additionally test the
new functionality.
doc/user_guide.texi:
Document the new behaviour.
NEWS:
Announce the new behaviour.
tests/accumulator/*.m:
tests/analysis_*/*.m:
tests/benchmarks*/*.m:
tests/debugger*/*.{m,exp,inp}:
tests/declarative_debugger*/*.{m,exp,inp}:
tests/dppd*/*.m:
tests/exceptions*/*.m:
tests/general*/*.m:
tests/grade_subdirs*/*.m:
tests/hard_coded*/*.m:
Make these tests use four-space indentation, and ensure that
each module is imported on its own line. (I intend to use the latter
to figure out which subdirectories' tests can be executed in parallel.)
These changes usually move code to different lines. For the debugger tests,
specify the new line numbers in .inp files and expect them in .exp files.
Estimated hours taken: 1
Clean up the debugger tests directory by (a) removing the long obsolete
*_lib files, and (b) separating out the three roles of the queens.m
into mdb_command_test.m and interactive.m as well as queens.m.
tests/debugger/mdb_command_test.m:
Add a trivial source file for this test. The other files of the test
case (.inp, .exp) already existed.
tests/debugger/queens.{m,exp,inp}:
Remove the tests of interactive functionality.
tests/debugger/interactive.{m,exp,inp}:
A renamed copy of the old queens.m, with the interactive functionality
intact. Note: since this test case is currently disabled, I cannot
be sure that the .exp file is quite correct in every detail.
tests/debugger/*_lib.*:
Removed these obsolete test cases, since for a while now we have
avoided depending on whether the library was compiled with tracing
or not by leaving all library code to the end and not printing
or stopping at any event inside library code.
tests/debugger/Mmakefile:
Make the necessary updates to accommodate the above changes.
