[WIP] Tmain: add a case testing operators for boolean fields

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

Tmain/parser-own-fields-for-foreign-lang.d/input.unknownx

@@ -4,3 +4,5 @@ private func baz(n,...);
 X:tagme@iamowner
 Y:iamowner2=tagme2
 Z:tagme-z@iamowner-z
+eset:a
+enoset:b

Tmain/parser-own-fields-for-foreign-lang.d/knownz.ctags

@@ -7,3 +7,6 @@
 --fields-knownz=+{len}
 --_fielddef-knownz=lenplus,the length of owner string + 1{datatype=int}
 --fields-knownz=+{lenplus}
+
+--_fielddef-knownz=exported,whether the marker is exported or not{datatype=bool}
+--fields-knownz=+{exported}

Tmain/parser-own-fields-for-foreign-lang.d/stdout-expected.txt

@@ -1,3 +1,6 @@
+7_exported	input.unknownx	/^enoset:b$/;"	m	language:knownz
+a	input.unknownx	/^eset:a$/;"	m	language:knownz	exported:t
+b	input.unknownx	/^enoset:b$/;"	m	language:knownz	exported:
 bar	input.unknownx	/^protected func bar(n);$/;"	f	language:unknownx	protection:protected 	signature:(n)
 baz	input.unknownx	/^private func baz(n,...);$/;"	f	language:unknownx	protection:private 	signature:(n,...)
 foo	input.unknownx	/^public func foo(n, m);$/;"	f	language:unknownx	protection:public 	signature:(n, m)

Tmain/parser-own-fields-for-foreign-lang.d/unknownx.ctags

@@ -5,6 +5,10 @@
 --_fielddef-unknownx=protection,protections
 --_fielddef-unknownx=signature,signatures
 
+--_prelude-unknownx={{
+   /exported false def
+}}
+
 --regex-unknownx=/^((public|protected|private) +)?func ([^\(]+)\((.*)\)/\3/f/{_field=protection:\1}{_field=signature:(\4)}
 --regex-unknownx=/^X:([a-z]+)@([a-z]+)/\1/m/{_language=knownz}{_field=owner:\2}
 --regex-unknownx=/^Y:([a-z0-9]+)=([a-z0-9]+)/\2/m/{_field=owner:\1}{_language=knownz}
@@ -18,3 +22,18 @@
         . exch knownz.lenplus:
     } if
 }}
+
+--regex-unknownx=/^eset:([-a-z]+)/\1/m/{_language=knownz}{{
+    /exported . def
+    . true knownz.exported:
+}}
+
+--regex-unknownx=/^enoset:([-a-z]+)/\1/m/{_language=knownz}{{
+    . false knownz.exported:
+    exported :knownz.exported and {
+       mark exported 0 string cvs (_exported) _buildstring
+       /knownz
+       /mark
+       1@ _foreigntag _commit pop
+    } if
+}}