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Just figured out why a first keystroke of backspace was sending me out
for a spin: run_interactive needs all early exits that don't actually
run anything to increment the current_step_index(). FML, this is lousy..
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In the process we now support unicode in all mu strings!
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I'm still having trouble with prematurely closed strings or strings
never being closed. Remember that when escaping brackets inside
scenarios you usually need two levels of escaping. The single-level is
a no-op and usually misleading. When brackets balance, don't bother
escaping. When they don't, escape twice.
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As expected, I've already found two bugs in the repl during manual
testing. Still don't have a good characterization of when things go off
the rails.
But certainly hitting backspace too many times isn't messing things up
as I'd feared. Which might also be a bug, if the program isn't behaving
as I expect.
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But I'm sure the next bug is nearby. And even if there's a solution
around here, the logic is now quite convoluted, with strings sometimes
returning on completion and sometimes recursing further in. We'll need
to rethink this.
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slurp-string should sometimes return and sometimes recurse. Graah.
But the trace browser is awesome.
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Ah, the failing test isn't what I thought. This is a regression.
Let's debug this using the trace-browser! Little tweak as I use it.
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Aaalmost there..
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More groundwork for dealing with backspacing back into string: instead
of simply exiting the current stack frame when the string completes,
create a *new* stack frame. More tests failing, but we're getting closer.
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Fix messages on failed screen tests.
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repl still needs to handle backspacing *back into* strings. This tries
to lay the groundwork.
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Cleaner to delegate as much as possible to slurp_quoted.
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Doesn't actually work interactively yet; for some reason it prints in
color, enter doesn't work, etc.
It'll be interesting to try to add color and history as separate
'layers' using before/after.
I'll also likely have to delete traces for its tests at some point as
they inevitably explode in size.
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From http://www.musklevel.com/s/xregsj/teaching_people_to_read_other_people%27s_computer_programs
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Required fixing two levels of bugs:
a) The hack in tangle to drop initial comments a '%' directive..
b) ..was masking a bug where run_mu_scenario wasn't robust to initial
comments.
Mildly concerned that neither of the sub-issues have their own tests,
but I'm just removing hacks, and writing tests for that throwaway
function like run_mu_scenario seems pointless. Instead I've solved the
problem by disallowing comments before '%' directives.
I've also taken this opportunity to at least try to document the
'scenarios' and '%' directives at the first layer where they appear.
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Unclear if filtering by color is the best interface.
Adding the color attribute into the screen contents seems ugly.
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