Add Go frontend, libgo library, and Go testsuite.

gcc/:
	* gcc.c (default_compilers): Add entry for ".go".
	* common.opt: Add -static-libgo as a driver option.
	* doc/install.texi (Configuration): Mention libgo as an option for
	--enable-shared.  Mention go as an option for --enable-languages.
	* doc/invoke.texi (Overall Options): Mention .go as a file name
	suffix.  Mention go as a -x option.
	* doc/frontends.texi (G++ and GCC): Mention Go as a supported
	language.
	* doc/sourcebuild.texi (Top Level): Mention libgo.
	* doc/standards.texi (Standards): Add section on Go language.
	Move references for other languages into their own section.
	* doc/contrib.texi (Contributors): Mention that I contributed the
	Go frontend.
gcc/testsuite/:
	* lib/go.exp: New file.
	* lib/go-dg.exp: New file.
	* lib/go-torture.exp: New file.
	* lib/target-supports.exp (check_compile): Match // Go.

From-SVN: r167407

1 files changed, 609 insertions, 0 deletions

diff --git a/libgo/go/template/template_test.go b/libgo/go/template/template_test.go
new file mode 100644
index 0000000..00fd69a
--- /dev/null
+++ b/libgo/go/template/template_test.go
@@ -0,0 +1,609 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package template
+
+import (
+	"bytes"
+	"container/vector"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"json"
+	"os"
+	"testing"
+)
+
+type Test struct {
+	in, out, err string
+}
+
+type T struct {
+	item  string
+	value string
+}
+
+type U struct {
+	mp map[string]int
+}
+
+type S struct {
+	header        string
+	integer       int
+	raw           string
+	innerT        T
+	innerPointerT *T
+	data          []T
+	pdata         []*T
+	empty         []*T
+	emptystring   string
+	null          []*T
+	vec           *vector.Vector
+	true          bool
+	false         bool
+	mp            map[string]string
+	json          interface{}
+	innermap      U
+	stringmap     map[string]string
+	bytes         []byte
+	iface         interface{}
+	ifaceptr      interface{}
+}
+
+func (s *S) pointerMethod() string { return "ptrmethod!" }
+
+func (s S) valueMethod() string { return "valmethod!" }
+
+var t1 = T{"ItemNumber1", "ValueNumber1"}
+var t2 = T{"ItemNumber2", "ValueNumber2"}
+
+func uppercase(v interface{}) string {
+	s := v.(string)
+	t := ""
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		if 'a' <= c && c <= 'z' {
+			c = c + 'A' - 'a'
+		}
+		t += string(c)
+	}
+	return t
+}
+
+func plus1(v interface{}) string {
+	i := v.(int)
+	return fmt.Sprint(i + 1)
+}
+
+func writer(f func(interface{}) string) func(io.Writer, interface{}, string) {
+	return func(w io.Writer, v interface{}, format string) {
+		io.WriteString(w, f(v))
+	}
+}
+
+
+var formatters = FormatterMap{
+	"uppercase": writer(uppercase),
+	"+1":        writer(plus1),
+}
+
+var tests = []*Test{
+	// Simple
+	&Test{"", "", ""},
+	&Test{"abc", "abc", ""},
+	&Test{"abc\ndef\n", "abc\ndef\n", ""},
+	&Test{" {.meta-left}   \n", "{", ""},
+	&Test{" {.meta-right}   \n", "}", ""},
+	&Test{" {.space}   \n", " ", ""},
+	&Test{" {.tab}   \n", "\t", ""},
+	&Test{"     {#comment}   \n", "", ""},
+	&Test{"\tSome Text\t\n", "\tSome Text\t\n", ""},
+	&Test{" {.meta-right} {.meta-right} {.meta-right} \n", " } } } \n", ""},
+
+	// Variables at top level
+	&Test{
+		in: "{header}={integer}\n",
+
+		out: "Header=77\n",
+	},
+
+	// Method at top level
+	&Test{
+		in: "ptrmethod={pointerMethod}\n",
+
+		out: "ptrmethod=ptrmethod!\n",
+	},
+
+	&Test{
+		in: "valmethod={valueMethod}\n",
+
+		out: "valmethod=valmethod!\n",
+	},
+
+	// Section
+	&Test{
+		in: "{.section data }\n" +
+			"some text for the section\n" +
+			"{.end}\n",
+
+		out: "some text for the section\n",
+	},
+	&Test{
+		in: "{.section data }\n" +
+			"{header}={integer}\n" +
+			"{.end}\n",
+
+		out: "Header=77\n",
+	},
+	&Test{
+		in: "{.section pdata }\n" +
+			"{header}={integer}\n" +
+			"{.end}\n",
+
+		out: "Header=77\n",
+	},
+	&Test{
+		in: "{.section pdata }\n" +
+			"data present\n" +
+			"{.or}\n" +
+			"data not present\n" +
+			"{.end}\n",
+
+		out: "data present\n",
+	},
+	&Test{
+		in: "{.section empty }\n" +
+			"data present\n" +
+			"{.or}\n" +
+			"data not present\n" +
+			"{.end}\n",
+
+		out: "data not present\n",
+	},
+	&Test{
+		in: "{.section null }\n" +
+			"data present\n" +
+			"{.or}\n" +
+			"data not present\n" +
+			"{.end}\n",
+
+		out: "data not present\n",
+	},
+	&Test{
+		in: "{.section pdata }\n" +
+			"{header}={integer}\n" +
+			"{.section @ }\n" +
+			"{header}={integer}\n" +
+			"{.end}\n" +
+			"{.end}\n",
+
+		out: "Header=77\n" +
+			"Header=77\n",
+	},
+
+	&Test{
+		in: "{.section data}{.end} {header}\n",
+
+		out: " Header\n",
+	},
+
+	// Repeated
+	&Test{
+		in: "{.section pdata }\n" +
+			"{.repeated section @ }\n" +
+			"{item}={value}\n" +
+			"{.end}\n" +
+			"{.end}\n",
+
+		out: "ItemNumber1=ValueNumber1\n" +
+			"ItemNumber2=ValueNumber2\n",
+	},
+	&Test{
+		in: "{.section pdata }\n" +
+			"{.repeated section @ }\n" +
+			"{item}={value}\n" +
+			"{.or}\n" +
+			"this should not appear\n" +
+			"{.end}\n" +
+			"{.end}\n",
+
+		out: "ItemNumber1=ValueNumber1\n" +
+			"ItemNumber2=ValueNumber2\n",
+	},
+	&Test{
+		in: "{.section @ }\n" +
+			"{.repeated section empty }\n" +
+			"{item}={value}\n" +
+			"{.or}\n" +
+			"this should appear: empty field\n" +
+			"{.end}\n" +
+			"{.end}\n",
+
+		out: "this should appear: empty field\n",
+	},
+	&Test{
+		in: "{.repeated section pdata }\n" +
+			"{item}\n" +
+			"{.alternates with}\n" +
+			"is\nover\nmultiple\nlines\n" +
+			"{.end}\n",
+
+		out: "ItemNumber1\n" +
+			"is\nover\nmultiple\nlines\n" +
+			"ItemNumber2\n",
+	},
+	&Test{
+		in: "{.repeated section pdata }\n" +
+			"{item}\n" +
+			"{.alternates with}\n" +
+			"is\nover\nmultiple\nlines\n" +
+			" {.end}\n",
+
+		out: "ItemNumber1\n" +
+			"is\nover\nmultiple\nlines\n" +
+			"ItemNumber2\n",
+	},
+	&Test{
+		in: "{.section pdata }\n" +
+			"{.repeated section @ }\n" +
+			"{item}={value}\n" +
+			"{.alternates with}DIVIDER\n" +
+			"{.or}\n" +
+			"this should not appear\n" +
+			"{.end}\n" +
+			"{.end}\n",
+
+		out: "ItemNumber1=ValueNumber1\n" +
+			"DIVIDER\n" +
+			"ItemNumber2=ValueNumber2\n",
+	},
+	&Test{
+		in: "{.repeated section vec }\n" +
+			"{@}\n" +
+			"{.end}\n",
+
+		out: "elt1\n" +
+			"elt2\n",
+	},
+	// Same but with a space before {.end}: was a bug.
+	&Test{
+		in: "{.repeated section vec }\n" +
+			"{@} {.end}\n",
+
+		out: "elt1 elt2 \n",
+	},
+	&Test{
+		in: "{.repeated section integer}{.end}",
+
+		err: "line 1: .repeated: cannot repeat integer (type int)",
+	},
+
+	// Nested names
+	&Test{
+		in: "{.section @ }\n" +
+			"{innerT.item}={innerT.value}\n" +
+			"{.end}",
+
+		out: "ItemNumber1=ValueNumber1\n",
+	},
+	&Test{
+		in: "{.section @ }\n" +
+			"{innerT.item}={.section innerT}{.section value}{@}{.end}{.end}\n" +
+			"{.end}",
+
+		out: "ItemNumber1=ValueNumber1\n",
+	},
+
+
+	// Formatters
+	&Test{
+		in: "{.section pdata }\n" +
+			"{header|uppercase}={integer|+1}\n" +
+			"{header|html}={integer|str}\n" +
+			"{.end}\n",
+
+		out: "HEADER=78\n" +
+			"Header=77\n",
+	},
+
+	&Test{
+		in: "{raw}\n" +
+			"{raw|html}\n",
+
+		out: "&<>!@ #$%^\n" +
+			"&amp;&lt;&gt;!@ #$%^\n",
+	},
+
+	&Test{
+		in: "{.section emptystring}emptystring{.end}\n" +
+			"{.section header}header{.end}\n",
+
+		out: "\nheader\n",
+	},
+
+	&Test{
+		in: "{.section true}1{.or}2{.end}\n" +
+			"{.section false}3{.or}4{.end}\n",
+
+		out: "1\n4\n",
+	},
+
+	&Test{
+		in: "{bytes}",
+
+		out: "hello",
+	},
+
+	// Maps
+
+	&Test{
+		in: "{mp.mapkey}\n",
+
+		out: "Ahoy!\n",
+	},
+	&Test{
+		in: "{innermap.mp.innerkey}\n",
+
+		out: "55\n",
+	},
+	&Test{
+		in: "{.section innermap}{.section mp}{innerkey}{.end}{.end}\n",
+
+		out: "55\n",
+	},
+	&Test{
+		in: "{.section json}{.repeated section maps}{a}{b}{.end}{.end}\n",
+
+		out: "1234\n",
+	},
+	&Test{
+		in: "{stringmap.stringkey1}\n",
+
+		out: "stringresult\n",
+	},
+	&Test{
+		in: "{.repeated section stringmap}\n" +
+			"{@}\n" +
+			"{.end}",
+
+		out: "stringresult\n" +
+			"stringresult\n",
+	},
+	&Test{
+		in: "{.repeated section stringmap}\n" +
+			"\t{@}\n" +
+			"{.end}",
+
+		out: "\tstringresult\n" +
+			"\tstringresult\n",
+	},
+
+	// Interface values
+
+	&Test{
+		in: "{iface}",
+
+		out: "[1 2 3]",
+	},
+	&Test{
+		in: "{.repeated section iface}{@}{.alternates with} {.end}",
+
+		out: "1 2 3",
+	},
+	&Test{
+		in: "{.section iface}{@}{.end}",
+
+		out: "[1 2 3]",
+	},
+	&Test{
+		in: "{.section ifaceptr}{item} {value}{.end}",
+
+		out: "Item Value",
+	},
+}
+
+func TestAll(t *testing.T) {
+	// Parse
+	testAll(t, func(test *Test) (*Template, os.Error) { return Parse(test.in, formatters) })
+	// ParseFile
+	testAll(t, func(test *Test) (*Template, os.Error) {
+		err := ioutil.WriteFile("_test/test.tmpl", []byte(test.in), 0600)
+		if err != nil {
+			t.Error("unexpected write error:", err)
+			return nil, err
+		}
+		return ParseFile("_test/test.tmpl", formatters)
+	})
+	// tmpl.ParseFile
+	testAll(t, func(test *Test) (*Template, os.Error) {
+		err := ioutil.WriteFile("_test/test.tmpl", []byte(test.in), 0600)
+		if err != nil {
+			t.Error("unexpected write error:", err)
+			return nil, err
+		}
+		tmpl := New(formatters)
+		return tmpl, tmpl.ParseFile("_test/test.tmpl")
+	})
+}
+
+func testAll(t *testing.T, parseFunc func(*Test) (*Template, os.Error)) {
+	s := new(S)
+	// initialized by hand for clarity.
+	s.header = "Header"
+	s.integer = 77
+	s.raw = "&<>!@ #$%^"
+	s.innerT = t1
+	s.data = []T{t1, t2}
+	s.pdata = []*T{&t1, &t2}
+	s.empty = []*T{}
+	s.null = nil
+	s.vec = new(vector.Vector)
+	s.vec.Push("elt1")
+	s.vec.Push("elt2")
+	s.true = true
+	s.false = false
+	s.mp = make(map[string]string)
+	s.mp["mapkey"] = "Ahoy!"
+	json.Unmarshal([]byte(`{"maps":[{"a":1,"b":2},{"a":3,"b":4}]}`), &s.json)
+	s.innermap.mp = make(map[string]int)
+	s.innermap.mp["innerkey"] = 55
+	s.stringmap = make(map[string]string)
+	s.stringmap["stringkey1"] = "stringresult" // the same value so repeated section is order-independent
+	s.stringmap["stringkey2"] = "stringresult"
+	s.bytes = []byte("hello")
+	s.iface = []int{1, 2, 3}
+	s.ifaceptr = &T{"Item", "Value"}
+
+	var buf bytes.Buffer
+	for _, test := range tests {
+		buf.Reset()
+		tmpl, err := parseFunc(test)
+		if err != nil {
+			t.Error("unexpected parse error: ", err)
+			continue
+		}
+		err = tmpl.Execute(s, &buf)
+		if test.err == "" {
+			if err != nil {
+				t.Error("unexpected execute error:", err)
+			}
+		} else {
+			if err == nil {
+				t.Errorf("expected execute error %q, got nil", test.err)
+			} else if err.String() != test.err {
+				t.Errorf("expected execute error %q, got %q", test.err, err.String())
+			}
+		}
+		if buf.String() != test.out {
+			t.Errorf("for %q: expected %q got %q", test.in, test.out, buf.String())
+		}
+	}
+}
+
+func TestMapDriverType(t *testing.T) {
+	mp := map[string]string{"footer": "Ahoy!"}
+	tmpl, err := Parse("template: {footer}", nil)
+	if err != nil {
+		t.Error("unexpected parse error:", err)
+	}
+	var b bytes.Buffer
+	err = tmpl.Execute(mp, &b)
+	if err != nil {
+		t.Error("unexpected execute error:", err)
+	}
+	s := b.String()
+	expected := "template: Ahoy!"
+	if s != expected {
+		t.Errorf("failed passing string as data: expected %q got %q", "template: Ahoy!", s)
+	}
+}
+
+func TestStringDriverType(t *testing.T) {
+	tmpl, err := Parse("template: {@}", nil)
+	if err != nil {
+		t.Error("unexpected parse error:", err)
+	}
+	var b bytes.Buffer
+	err = tmpl.Execute("hello", &b)
+	if err != nil {
+		t.Error("unexpected execute error:", err)
+	}
+	s := b.String()
+	if s != "template: hello" {
+		t.Errorf("failed passing string as data: expected %q got %q", "template: hello", s)
+	}
+}
+
+func TestTwice(t *testing.T) {
+	tmpl, err := Parse("template: {@}", nil)
+	if err != nil {
+		t.Error("unexpected parse error:", err)
+	}
+	var b bytes.Buffer
+	err = tmpl.Execute("hello", &b)
+	if err != nil {
+		t.Error("unexpected parse error:", err)
+	}
+	s := b.String()
+	text := "template: hello"
+	if s != text {
+		t.Errorf("failed passing string as data: expected %q got %q", text, s)
+	}
+	err = tmpl.Execute("hello", &b)
+	if err != nil {
+		t.Error("unexpected parse error:", err)
+	}
+	s = b.String()
+	text += text
+	if s != text {
+		t.Errorf("failed passing string as data: expected %q got %q", text, s)
+	}
+}
+
+func TestCustomDelims(t *testing.T) {
+	// try various lengths.  zero should catch error.
+	for i := 0; i < 7; i++ {
+		for j := 0; j < 7; j++ {
+			tmpl := New(nil)
+			// first two chars deliberately the same to test equal left and right delims
+			ldelim := "$!#$%^&"[0:i]
+			rdelim := "$*&^%$!"[0:j]
+			tmpl.SetDelims(ldelim, rdelim)
+			// if braces, this would be template: {@}{.meta-left}{.meta-right}
+			text := "template: " +
+				ldelim + "@" + rdelim +
+				ldelim + ".meta-left" + rdelim +
+				ldelim + ".meta-right" + rdelim
+			err := tmpl.Parse(text)
+			if err != nil {
+				if i == 0 || j == 0 { // expected
+					continue
+				}
+				t.Error("unexpected parse error:", err)
+			} else if i == 0 || j == 0 {
+				t.Errorf("expected parse error for empty delimiter: %d %d %q %q", i, j, ldelim, rdelim)
+				continue
+			}
+			var b bytes.Buffer
+			err = tmpl.Execute("hello", &b)
+			s := b.String()
+			if s != "template: hello"+ldelim+rdelim {
+				t.Errorf("failed delim check(%q %q) %q got %q", ldelim, rdelim, text, s)
+			}
+		}
+	}
+}
+
+// Test that a variable evaluates to the field itself and does not further indirection
+func TestVarIndirection(t *testing.T) {
+	s := new(S)
+	// initialized by hand for clarity.
+	s.innerPointerT = &t1
+
+	var buf bytes.Buffer
+	input := "{.section @}{innerPointerT}{.end}"
+	tmpl, err := Parse(input, nil)
+	if err != nil {
+		t.Fatal("unexpected parse error:", err)
+	}
+	err = tmpl.Execute(s, &buf)
+	if err != nil {
+		t.Fatal("unexpected execute error:", err)
+	}
+	expect := fmt.Sprintf("%v", &t1) // output should be hex address of t1
+	if buf.String() != expect {
+		t.Errorf("for %q: expected %q got %q", input, expect, buf.String())
+	}
+}
+
+func TestHTMLFormatterWithByte(t *testing.T) {
+	s := "Test string."
+	b := []byte(s)
+	var buf bytes.Buffer
+	HTMLFormatter(&buf, b, "")
+	bs := buf.String()
+	if bs != s {
+		t.Errorf("munged []byte, expected: %s got: %s", s, bs)
+	}
+}