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bistromathic: beware of portability issues with readline
From: |
Akim Demaille |
Subject: |
bistromathic: beware of portability issues with readline |
Date: |
Mon, 9 Aug 2021 06:46:29 +0200 |
commit 4b802d64171203642c1c0b148ff8ace8fdaeb1f5
Author: Akim Demaille <akim.demaille@gmail.com>
Date: Tue Aug 3 07:33:33 2021 +0200
bistromathic: beware of portability issues with readline
In some cases readline emits a trailing spaces after the last
suggestion, which results in errors such as:
```
-( - atan cos exp ln number sin sqrt$
+( - atan cos exp ln number sin sqrt $
```
Reported by Christopher Nielsen <mascguy@github.com>.
<https://trac.macports.org/ticket/59927#comment:48>
<https://trac.macports.org/attachment/ticket/59927/bison-3.7.6-test-10.13.test-suite.log>
* examples/test (run): Add support for -t.
* examples/c/bistromathic/bistromathic.test: Use it.
diff --git a/examples/c/bistromathic/bistromathic.test
b/examples/c/bistromathic/bistromathic.test
index badccc0d..2db5dcfe 100755
--- a/examples/c/bistromathic/bistromathic.test
+++ b/examples/c/bistromathic/bistromathic.test
@@ -306,10 +306,17 @@ esac
sed -e 's/\\t/ /g' >input <<EOF
(1+\t\t
EOF
-run 0 '> (1+
+# Nuke the possible trailing white spaces in the effective output.
+# This is to cope with some readlines that pad all the suggestions
+# with white spaces (for alignment), including the last one on a line.
+#
+# See for instance <https://trac.macports.org/ticket/59927#comment:48>
+# and its test-suite.log:
+#
<https://trac.macports.org/attachment/ticket/59927/bison-3.7.6-test-10.13.test-suite.log>
+run -t 0 '> (1+
( - atan cos exp ln number sin sqrt
> (1+
-> ''
+>
err: 1.4: syntax error: expected - or ( or number or function or variable
before end of file
err: 1 | (1+
err: | ^'
diff --git a/examples/test b/examples/test
index f96e5b4d..a5370624 100755
--- a/examples/test
+++ b/examples/test
@@ -91,18 +91,21 @@ skip ()
}
-# run [-noerr, -n] EXPECTED-EXIT-STATUS EXPECTED-OUTPUT [PARSER-OPTIONS]
-# ----------------------------------------------------------------------
+# run [-n, -noerr, -t] EXPECTED-EXIT-STATUS EXPECTED-OUTPUT [PARSER-OPTIONS]
+# --------------------------------------------------------------------------
+# -n: no final end-of-line in expected-output
# -noerr: ignore stderr, otherwise merge it into effective output.
-# -n: not final end-of-line in expected-output
+# -t: nuke the possible trailing white spaces in the effective output.
run ()
{
- noerr=false
echo=echo
+ noerr=false
+ rstrip=false
while true; do
case $1 in
- (-noerr) noerr=true; shift;;
(-n) echo=printf; shift;;
+ (-noerr) noerr=true; shift;;
+ (-t) rstrip=true; shift;;
(*) break;;
esac
done
@@ -129,7 +132,11 @@ run ()
# Combine effective output and error streams.
{
- cat out_eff
+ if $rstrip; then
+ sed -e 's/ *$//g' out_eff
+ else
+ cat out_eff
+ fi
if ! $noerr; then
sed -e 's/^/err: /g' \
-e 's/Reducing stack by rule .* (line .*):/Reducing stack by rule
XX (line XXX):/g' \
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