Imported Upstream version 60upstream/60

1 files changed, 50 insertions, 0 deletions

diff --git a/src/pkg/template/parse/set.go b/src/pkg/template/parse/set.go
new file mode 100644
index 000000000..dca41ea76
--- /dev/null
+++ b/src/pkg/template/parse/set.go
@@ -0,0 +1,50 @@
+// Copyright 2011 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 parse
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+// Set returns a slice of Trees created by parsing the template set
+// definition in the argument string. If an error is encountered,
+// parsing stops and an empty slice is returned with the error.
+func Set(text string, funcs ...map[string]interface{}) (tree map[string]*Tree, err os.Error) {
+	tree = make(map[string]*Tree)
+	defer (*Tree)(nil).recover(&err)
+	lex := lex("set", text)
+	const context = "define clause"
+	for {
+		t := New("set") // name will be updated once we know it.
+		t.startParse(funcs, lex)
+		// Expect EOF or "{{ define name }}".
+		if t.atEOF() {
+			break
+		}
+		t.expect(itemLeftDelim, context)
+		t.expect(itemDefine, context)
+		name := t.expect(itemString, context)
+		t.Name, err = strconv.Unquote(name.val)
+		if err != nil {
+			t.error(err)
+		}
+		t.expect(itemRightDelim, context)
+		end := t.parse(false)
+		if end == nil {
+			t.errorf("unexpected EOF in %s", context)
+		}
+		if end.Type() != nodeEnd {
+			t.errorf("unexpected %s in %s", end, context)
+		}
+		t.stopParse()
+		if _, present := tree[t.Name]; present {
+			return nil, fmt.Errorf("template: %q multiply defined", name)
+		}
+		tree[t.Name] = t
+	}
+	return
+}