Support Go language in 'etags'

* lib-src/etags.c <Ruby_help>: Fix documentation of Ruby tags.
<Go_help>: New help.
<Go_suffixes>: New variable.
(Go_functions): New function.
<lang_names>: Add entry for Go.  (Bug#22370)

* doc/emacs/maintaining.texi (Tag Syntax): Document Go support.
* doc/man/etags.1: Mention Go support.

* etc/NEWS: Mention Go support.

* test/etags/go-src/test.go:
* test/etags/go-src/test1.go: New test files.
* test/etags/Makefile (GOSRC): New variable.
(SRCS): Add $(GOSRC).
* test/etags/ETAGS.good_1:
* test/etags/ETAGS.good_2:
* test/etags/ETAGS.good_3:
* test/etags/ETAGS.good_4:
* test/etags/ETAGS.good_5:
* test/etags/ETAGS.good_6:
* test/etags/CTAGS.good: Adapt to addition of Go tests.

10 files changed, 141 insertions, 3 deletions

diff --git a/test/etags/CTAGS.good b/test/etags/CTAGS.good
index 86eb9f85cf3..846725ef713 100644
--- a/test/etags/CTAGS.good
+++ b/test/etags/CTAGS.good
@@ -947,6 +947,10 @@ MoveLayerAfter	lua-src/allegro.lua	/^function MoveLayerAfter (this_one)$/
 MoveLayerBefore	lua-src/allegro.lua	/^function MoveLayerBefore (this_one)$/
 MoveLayerBottom	lua-src/allegro.lua	/^function MoveLayerBottom ()$/
 MoveLayerTop	lua-src/allegro.lua	/^function MoveLayerTop ()$/
+Mtest.go	go-src/test.go	1
+Mtest.go	go-src/test.go	/^func main() {$/
+Mtest1.go	go-src/test1.go	1
+Mtest1.go	go-src/test1.go	/^func main() {$/
 Mx.cc	cp-src/x.cc	/^main(int argc, char *argv[])$/
 NAME	y-src/cccp.c	8
 NATNUMP	c-src/emacs/src/lisp.h	/^NATNUMP (Lisp_Object x)$/
@@ -1077,6 +1081,8 @@ Pkg1_Proc2/p	ada-src/waroquiers.ada	/^  procedure Pkg1_Proc2 (I : Integer);$/
 Pkg1_Proc2/p	ada-src/waroquiers.ada	/^  procedure Pkg1_Proc2 (I : Integer) is$/
 PostControls	pyt-src/server.py	/^    def PostControls(self):$/
 Pre_Call_State/t	ada-src/2ataspri.ads	/^   type Pre_Call_State is new System.Address;$/
+PrintAdd	go-src/test1.go	/^func (s str) PrintAdd() {$/
+PrintAdd	go-src/test1.go	/^func (n intNumber) PrintAdd() {$/
 Private	objc-src/Subprocess.m	/^@interface Subprocess(Private)$/
 Private_T/b	ada-src/etags-test-for.ada	/^    task body Private_T is$/
 Private_T/b	ada-src/waroquiers.ada	/^    task body Private_T is$/
@@ -3135,6 +3141,7 @@ instance_method_question?	ruby-src/test.rb	/^        def instance_method_questio
 instr	y-src/parse.y	80
 instr	parse.y	80
 instruct	c-src/etags.c	2527
+intNumber	go-src/test1.go	13
 integer	c-src/emacs/src/lisp.h	2127
 integer	cccp.y	113
 integer	y-src/cccp.y	112
@@ -3738,6 +3745,7 @@ plain_C_suffixes	c-src/etags.c	643
 plainc	c-src/etags.c	2934
 plist	c-src/emacs/src/lisp.h	697
 plus	cp-src/functions.cpp	/^void Date::plus ( int days , int month , int year /
+plus	go-src/test1.go	5
 plusvalseq	prol-src/natded.prolog	/^plusvalseq([]) --> [].$/
 pointer	c-src/emacs/src/lisp.h	2125
 poll_for_input	c-src/emacs/src/keyboard.c	/^poll_for_input (struct atimer *timer)$/
@@ -3950,6 +3958,7 @@ save_getcjmp	c-src/emacs/src/keyboard.c	/^save_getcjmp (sys_jmp_buf temp)$/
 save_type	c-src/emacs/src/lisp.h	/^save_type (struct Lisp_Save_Value *v, int n)$/
 savenstr	c-src/etags.c	/^savenstr (const char *cp, int len)$/
 savestr	c-src/etags.c	/^savestr (const char *cp)$/
+say	go-src/test.go	/^func say(msg string) {$/
 scan_separators	c-src/etags.c	/^scan_separators (char *name)$/
 scolonseen	c-src/etags.c	2447
 scratch	c-src/sysdep.h	56
@@ -4075,6 +4084,7 @@ step	cp-src/clheir.hpp	/^    virtual void step(void) { }$/
 step_everybody	cp-src/clheir.cpp	/^void step_everybody(void)$/
 stop_polling	c-src/emacs/src/keyboard.c	/^stop_polling (void)$/
 store_user_signal_events	c-src/emacs/src/keyboard.c	/^store_user_signal_events (void)$/
+str	go-src/test1.go	9
 strcaseeq	c-src/etags.c	/^#define strcaseeq(s,t)	(assert ((s)!=NULL && (t)!=/
 streq	c-src/etags.c	/^#define streq(s,t)	(assert ((s)!=NULL || (t)!=NULL/
 string_intervals	c-src/emacs/src/lisp.h	/^string_intervals (Lisp_Object s)$/
@@ -4217,6 +4227,7 @@ terminateInput	objc-src/Subprocess.m	/^- terminateInput$/
 test	c-src/emacs/src/lisp.h	1871
 test	cp-src/c.C	86
 test	erl-src/gs_dialog.erl	/^test() ->$/
+test	go-src/test1.go	/^func test(p plus) {$/
 test	php-src/ptest.php	/^test $/
 test.me22b	lua-src/test.lua	/^   local function test.me22b (one)$/
 test.me_22a	lua-src/test.lua	/^   function test.me_22a(one, two)$/
diff --git a/test/etags/ETAGS.good_1 b/test/etags/ETAGS.good_1
index 44ac091066b..c7b122111c4 100644
--- a/test/etags/ETAGS.good_1
+++ b/test/etags/ETAGS.good_1
@@ -2283,6 +2283,18 @@ constant (a-forth-constant(a-forth-constant
38,628
 code assemby-code-word 43,685
 : a-forth-word 50,870
 
+go-src/test.go,48
+package main1,0
+func say(5,28
+func main(9,72
+
+go-src/test1.go,119
+package main1,0
+func (s str) PrintAdd(17,136
+func (n intNumber) PrintAdd(21,189
+func test(25,248
+func main(29,285
+
 html-src/softwarelibero.html,200
 Cos'è il software libero?4,38
 Licenze d'uso di un programmalicenze
65,2500
diff --git a/test/etags/ETAGS.good_2 b/test/etags/ETAGS.good_2
index 8a93e3b0656..8d0f33824a4 100644
--- a/test/etags/ETAGS.good_2
+++ b/test/etags/ETAGS.good_2
@@ -2852,6 +2852,18 @@ constant (a-forth-constant(a-forth-constant
38,628
 code assemby-code-word 43,685
 : a-forth-word 50,870
 
+go-src/test.go,48
+package main1,0
+func say(5,28
+func main(9,72
+
+go-src/test1.go,119
+package main1,0
+func (s str) PrintAdd(17,136
+func (n intNumber) PrintAdd(21,189
+func test(25,248
+func main(29,285
+
 html-src/softwarelibero.html,200
 Cos'è il software libero?4,38
 Licenze d'uso di un programmalicenze
65,2500
diff --git a/test/etags/ETAGS.good_3 b/test/etags/ETAGS.good_3
index e575b40ab0d..060389c6232 100644
--- a/test/etags/ETAGS.good_3
+++ b/test/etags/ETAGS.good_3
@@ -2600,6 +2600,21 @@ constant (a-forth-constant(a-forth-constant
38,628
 code assemby-code-word 43,685
 : a-forth-word 50,870
 
+go-src/test.go,48
+package main1,0
+func say(5,28
+func main(9,72
+
+go-src/test1.go,172
+package main1,0
+type plus 5,28
+type str 9,65
+type intNumber 13,99
+func (s str) PrintAdd(17,136
+func (n intNumber) PrintAdd(21,189
+func test(25,248
+func main(29,285
+
 html-src/softwarelibero.html,200
 Cos'è il software libero?4,38
 Licenze d'uso di un programmalicenze
65,2500
diff --git a/test/etags/ETAGS.good_4 b/test/etags/ETAGS.good_4
index 28258060517..40404f9fc6e 100644
--- a/test/etags/ETAGS.good_4
+++ b/test/etags/ETAGS.good_4
@@ -2447,6 +2447,18 @@ constant (a-forth-constant(a-forth-constant
38,628
 code assemby-code-word 43,685
 : a-forth-word 50,870
 
+go-src/test.go,48
+package main1,0
+func say(5,28
+func main(9,72
+
+go-src/test1.go,119
+package main1,0
+func (s str) PrintAdd(17,136
+func (n intNumber) PrintAdd(21,189
+func test(25,248
+func main(29,285
+
 html-src/softwarelibero.html,200
 Cos'è il software libero?4,38
 Licenze d'uso di un programmalicenze
65,2500
diff --git a/test/etags/ETAGS.good_5 b/test/etags/ETAGS.good_5
index 35bb353c767..432819d3b32 100644
--- a/test/etags/ETAGS.good_5
+++ b/test/etags/ETAGS.good_5
@@ -3333,6 +3333,21 @@ constant (a-forth-constant(a-forth-constant
38,628
 code assemby-code-word 43,685
 : a-forth-word 50,870
 
+go-src/test.go,48
+package main1,0
+func say(5,28
+func main(9,72
+
+go-src/test1.go,172
+package main1,0
+type plus 5,28
+type str 9,65
+type intNumber 13,99
+func (s str) PrintAdd(17,136
+func (n intNumber) PrintAdd(21,189
+func test(25,248
+func main(29,285
+
 html-src/softwarelibero.html,200
 Cos'è il software libero?4,38
 Licenze d'uso di un programmalicenze
65,2500
diff --git a/test/etags/ETAGS.good_6 b/test/etags/ETAGS.good_6
index 8add300784f..4ad5d76db27 100644
--- a/test/etags/ETAGS.good_6
+++ b/test/etags/ETAGS.good_6
@@ -3333,6 +3333,21 @@ constant (a-forth-constant(a-forth-constant
38,628
 code assemby-code-word 43,685
 : a-forth-word 50,870
 
+go-src/test.go,48
+package main1,0
+func say(5,28
+func main(9,72
+
+go-src/test1.go,172
+package main1,0
+type plus 5,28
+type str 9,65
+type intNumber 13,99
+func (s str) PrintAdd(17,136
+func (n intNumber) PrintAdd(21,189
+func test(25,248
+func main(29,285
+
 html-src/softwarelibero.html,200
 Cos'è il software libero?4,38
 Licenze d'uso di un programmalicenze
65,2500
diff --git a/test/etags/Makefile b/test/etags/Makefile
index 00d5b9f52b2..21a77eb0c5d 100644
--- a/test/etags/Makefile
+++ b/test/etags/Makefile
@@ -11,6 +11,7 @@ ELSRC=$(addprefix ./el-src/,TAGTEST.EL emacs/lisp/progmodes/etags.el)
 ERLSRC=$(addprefix ./erl-src/,gs_dialog.erl)
 FORTHSRC=$(addprefix ./forth-src/,test-forth.fth)
 FSRC=$(addprefix ./f-src/,entry.for entry.strange_suffix entry.strange)
+GOSRC=$(addprefix ./go-src/,test.go test1.go)
 HTMLSRC=$(addprefix ./html-src/,softwarelibero.html index.shtml algrthms.html software.html)
 #JAVASRC=$(addprefix ./java-src/, )
 LUASRC=$(addprefix ./lua-src/,allegro.lua test.lua)
@@ -27,9 +28,9 @@ RBSRC=$(addprefix ./ruby-src/,test.rb test1.ruby)
 TEXSRC=$(addprefix ./tex-src/,testenv.tex gzip.texi texinfo.tex nonewline.tex)
 YSRC=$(addprefix ./y-src/,parse.y parse.c atest.y cccp.c cccp.y)
 SRCS=${ADASRC} ${ASRC} ${CSRC} ${CPSRC} ${ELSRC} ${ERLSRC} ${FSRC}\
-     ${FORTHSRC} ${HTMLSRC} ${JAVASRC} ${LUASRC} ${MAKESRC} ${OBJCSRC}\
-     ${OBJCPPSRC} ${PASSRC} ${PHPSRC} ${PERLSRC} ${PSSRC} ${PROLSRC} ${PYTSRC}\
-     ${RBSRC} ${TEXSRC} ${YSRC}
+     ${FORTHSRC} ${GOSRC} ${HTMLSRC} ${JAVASRC} ${LUASRC} ${MAKESRC}\
+     ${OBJCSRC} ${OBJCPPSRC} ${PASSRC} ${PHPSRC} ${PERLSRC} ${PSSRC}\
+     ${PROLSRC} ${PYTSRC} ${RBSRC} ${TEXSRC} ${YSRC}
 NONSRCS=./f-src/entry.strange ./erl-src/lists.erl ./cp-src/clheir.hpp.gz
 
 ETAGS_PROG=../../lib-src/etags
diff --git a/test/etags/go-src/test.go b/test/etags/go-src/test.go
new file mode 100644
index 00000000000..6aea26ef210
--- /dev/null
+++ b/test/etags/go-src/test.go
@@ -0,0 +1,11 @@
+package main
+
+import "fmt"
+
+func say(msg string) {
+	fmt.Println(msg)
+}
+
+func main() {
+	say("Hello, Emacs!")
+}
diff --git a/test/etags/go-src/test1.go b/test/etags/go-src/test1.go
new file mode 100644
index 00000000000..6d1efaaa8a9
--- /dev/null
+++ b/test/etags/go-src/test1.go
@@ -0,0 +1,34 @@
+package main
+
+import "fmt"
+
+type plus interface {
+	PrintAdd()
+}
+
+type str struct {
+	a, b string
+}
+
+type intNumber struct {
+	a, b int
+}
+
+func (s str) PrintAdd() {
+	fmt.Println(s.a + s.b)
+}
+
+func (n intNumber) PrintAdd() {
+	fmt.Println(n.a + n.b)
+}
+
+func test(p plus) {
+	p.PrintAdd()
+}
+
+func main() {
+	s := str{a: "Hello,", b: "Emacs!"}
+	number := intNumber{a: 1, b: 2}
+	test(number)
+	test(s)
+}