* HACKING, Makefile.am, configure.ac, m4/gccwarn.m4,

src/Makefile.am, src/ltlast/Makefile.am, src/ltlast/allnodes.hh,
src/ltlast/atomic_prop.cc, src/ltlast/atomic_prop.hh,
src/ltlast/binop.cc, src/ltlast/binop.hh, src/ltlast/constant.cc,
src/ltlast/constant.hh, src/ltlast/formulae.hh,
src/ltlast/multop.cc, src/ltlast/multop.hh, src/ltlast/predecl.hh,
src/ltlast/unop.cc, src/ltlast/unop.hh, src/ltlast/visitor.hh,
src/ltlparse/Makefile.am, src/ltlparse/ltlparse.yy,
src/ltlparse/ltlscan.ll, src/ltlparse/parsedecl.hh,
src/ltlparse/public.hh, src/ltlvisit/Makefile.am,
src/ltlvisit/dotty.cc, src/ltlvisit/dotty.hh,
src/ltlvisit/dump.cc, src/ltlvisit/dump.hh,
src/ltlvisit/rewrite.cc, src/ltlvisit/rewrite.hh,
src/ltltest/Makefile.am, src/ltltest/defs.in, src/ltltest/readltl.cc,
src/ltltest/parse.test, src/ltltest/parseerr.test,
src/misc/Makefile.am, src/misc/const_sel.hh: New files.

src/ltltest/parseerr.test

@@ -0,0 +1,47 @@
+#! /bin/sh
+
+# Check error recovery in parsing.  This also check how the
+# resulting tree looks like.
+
+. ./defs || exit 1
+
+check()
+{
+  if ./ltl2text "$1" >stdout; then
+    echo "ltl2text unexpectedly parsed '$1' successfully"
+    rm -f stdout
+    exit 1
+  else
+    if test -n "$2"; then
+      echo "$2" >expect
+    else
+      : >expect
+    fi
+    if cmp stdout expect; then
+      :
+    else
+      echo "'$1' parsed as"
+      cat stdout
+      echo "instead of"
+      cat expect
+      rm -f stdout expect
+      exit 1
+    fi
+  fi
+}
+
+# Empty or unparsable strings
+check '' ''
+check '+' ''
+check 'a U' ''
+check 'a U b V c R' ''
+
+# leading and trailing garbage are skipped
+check '/2/3/4/5 a + b /6/7/8/' 'multop(Or, AP(a), AP(b))'
+check 'a U b c' 'binop(U, AP(a), AP(b))'
+
+# Recovery inside parentheses
+check 'a U (b c) U e R (f g <=> h)' \
+      'binop(R, binop(U, binop(U, AP(a), AP(b)), AP(e)), AP(f))'
+check 'a U ((c) U e) R (<=> f g)' \
+      'binop(R, binop(U, AP(a), binop(U, AP(c), AP(e))), constant(0))'