Move template functions outside engine (refactoring)

template/dict.go

@@ -0,0 +1,22 @@
+// Copyright 2018 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package template
+
+import "fmt"
+
+func dict(values ...interface{}) (map[string]interface{}, error) {
+	if len(values)%2 != 0 {
+		return nil, fmt.Errorf("Dict expects an even number of arguments")
+	}
+	dict := make(map[string]interface{}, len(values)/2)
+	for i := 0; i < len(values); i += 2 {
+		key, ok := values[i].(string)
+		if !ok {
+			return nil, fmt.Errorf("Dict keys must be strings")
+		}
+		dict[key] = values[i+1]
+	}
+	return dict, nil
+}