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cex: color the counterexamples

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Use colors to show the counterexamples and the derivations in color,
to highlight their structure.  Align the outputs, and add i18n
support. Reduce width by using a one-space separator instead of
two-space.

From

    Example  A  •  B  C
    First  derivation  s ::=[ a ::=[ A  • ]  x ::=[ B  C ] ]
    Second derivation  s ::=[ y ::=[ A  •  B ]  c ::=[ C ] ]

to

    Example              A • B C
    First derivation     s ::=[ a ::=[ A • ] x ::=[ B C ] ]
    Example              A • B C
    Second derivation    s ::=[ y ::=[ A • B ] c ::=[ C ] ]

with colors.

* data/bison-default.css (cex-dot, cex-0, cex-1, cex-2, cex-3, cex-4)
(cex-5, cex-6, cex-7, cex-step, cex-leaf): New.
* src/derivation.c (derivation_print_styled_impl): New.
(derivation_print, derivation_print_leaves): Use it.
* src/counterexample.c: Reformat the output.
* tests/counterexample.at: Adjust.
This commit is contained in:
Akim Demaille
2020-05-23 19:13:01 +02:00
parent 296e2f90ab
commit ae5edcc23b
5 changed files with 197 additions and 147 deletions
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23
data/bison-default.css
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@@ -30,5 +30,28 @@
/* "Sections" in traces (--trace). */
.trace0 { color: green; }
/* Syntax error messages. */
.expected { color: green; }
.unexpected { color: red; }
/* Counterexamples. */
/* Cex: point in rule. */
.cex-dot { color: red; }
/* Cex: coloring various rules. */
.cex-0 { color: yellow; }
.cex-1 { color: green; }
.cex-2 { color: blue; }
.cex-3 { color: cobalt; }
.cex-4 { color: violet; }
.cex-5 { color: orange; }
.cex-6 { color: brown; }
.cex-7 { color: mauve; }
/* Cex: derivation rewriting steps. */
.cex-step { font-style: italic; }
/* Cex: leaves of a derivation. */
.cex-leaf { font-weight: 600; }