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vendor/github.com/spf13/cast/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Steve Francia
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/spf13/cast/README.md

@@ -0,0 +1,72 @@
+cast
+====
+
+Easy and safe casting from one type to another in Go
+
+Don’t Panic! ... Cast
+
+## What is Cast?
+
+Cast is a library to convert between different go types in a consistent and easy way.
+
+Cast provides simple functions to easily convert a number to a string, an
+interface into a bool, etc. Cast does this intelligently when an obvious
+conversion is possible. It doesn’t make any attempts to guess what you meant,
+for example you can only convert a string to an int when it is a string
+representation of an int such as “8”. Cast was developed for use in
+[Hugo](http://hugo.spf13.com), a website engine which uses YAML, TOML or JSON
+for meta data.
+
+## Why use Cast?
+
+When working with dynamic data in Go you often need to cast or convert the data
+from one type into another. Cast goes beyond just using type assertion (though
+it uses that when possible) to provide a very straightforward and convenient
+library.
+
+If you are working with interfaces to handle things like dynamic content
+you’ll need an easy way to convert an interface into a given type. This
+is the library for you.
+
+If you are taking in data from YAML, TOML or JSON or other formats which lack
+full types, then Cast is the library for you.
+
+## Usage
+
+Cast provides a handful of To_____ methods. These methods will always return
+the desired type. **If input is provided that will not convert to that type, the
+0 or nil value for that type will be returned**.
+
+Cast also provides identical methods To_____E. These return the same result as
+the To_____ methods, plus an additional error which tells you if it successfully
+converted. Using these methods you can tell the difference between when the
+input matched the zero value or when the conversion failed and the zero value
+was returned.
+
+The following examples are merely a sample of what is available. Please review
+the code for a complete set.
+
+### Example ‘ToString’:
+
+    cast.ToString("mayonegg")         // "mayonegg"
+    cast.ToString(8)                  // "8"
+    cast.ToString(8.31)               // "8.31"
+    cast.ToString([]byte("one time")) // "one time"
+    cast.ToString(nil)                // ""
+
+	var foo interface{} = "one more time"
+    cast.ToString(foo)                // "one more time"
+
+
+### Example ‘ToInt’:
+
+    cast.ToInt(8)                  // 8
+    cast.ToInt(8.31)               // 8
+    cast.ToInt("8")                // 8
+    cast.ToInt(true)               // 1
+    cast.ToInt(false)              // 0
+
+	var eight interface{} = 8
+    cast.ToInt(eight)              // 8
+    cast.ToInt(nil)                // 0
+

vendor/github.com/spf13/cast/cast.go

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+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import "time"
+
+func ToBool(i interface{}) bool {
+	v, _ := ToBoolE(i)
+	return v
+}
+
+func ToTime(i interface{}) time.Time {
+	v, _ := ToTimeE(i)
+	return v
+}
+
+func ToDuration(i interface{}) time.Duration {
+	v, _ := ToDurationE(i)
+	return v
+}
+
+func ToFloat64(i interface{}) float64 {
+	v, _ := ToFloat64E(i)
+	return v
+}
+
+func ToInt(i interface{}) int {
+	v, _ := ToIntE(i)
+	return v
+}
+
+func ToString(i interface{}) string {
+	v, _ := ToStringE(i)
+	return v
+}
+
+func ToStringMapString(i interface{}) map[string]string {
+	v, _ := ToStringMapStringE(i)
+	return v
+}
+
+func ToStringMapStringSlice(i interface{}) map[string][]string {
+	v, _ := ToStringMapStringSliceE(i)
+	return v
+}
+
+func ToStringMapBool(i interface{}) map[string]bool {
+	v, _ := ToStringMapBoolE(i)
+	return v
+}
+
+func ToStringMap(i interface{}) map[string]interface{} {
+	v, _ := ToStringMapE(i)
+	return v
+}
+
+func ToSlice(i interface{}) []interface{} {
+	v, _ := ToSliceE(i)
+	return v
+}
+
+func ToStringSlice(i interface{}) []string {
+	v, _ := ToStringSliceE(i)
+	return v
+}
+
+func ToIntSlice(i interface{}) []int {
+	v, _ := ToIntSliceE(i)
+	return v
+}

vendor/github.com/spf13/cast/cast_test.go

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+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import (
+	"html/template"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestToInt(t *testing.T) {
+	var eight interface{} = 8
+	assert.Equal(t, ToInt(8), 8)
+	assert.Equal(t, ToInt(8.31), 8)
+	assert.Equal(t, ToInt("8"), 8)
+	assert.Equal(t, ToInt(true), 1)
+	assert.Equal(t, ToInt(false), 0)
+	assert.Equal(t, ToInt(eight), 8)
+}
+
+func TestToFloat64(t *testing.T) {
+	var eight interface{} = 8
+	assert.Equal(t, ToFloat64(8), 8.00)
+	assert.Equal(t, ToFloat64(8.31), 8.31)
+	assert.Equal(t, ToFloat64("8.31"), 8.31)
+	assert.Equal(t, ToFloat64(eight), 8.0)
+}
+
+func TestToString(t *testing.T) {
+	var foo interface{} = "one more time"
+	assert.Equal(t, ToString(8), "8")
+	assert.Equal(t, ToString(8.12), "8.12")
+	assert.Equal(t, ToString([]byte("one time")), "one time")
+	assert.Equal(t, ToString(template.HTML("one time")), "one time")
+	assert.Equal(t, ToString(template.URL("http://somehost.foo")), "http://somehost.foo")
+	assert.Equal(t, ToString(foo), "one more time")
+	assert.Equal(t, ToString(nil), "")
+	assert.Equal(t, ToString(true), "true")
+	assert.Equal(t, ToString(false), "false")
+}
+
+type foo struct {
+	val string
+}
+
+func (x foo) String() string {
+	return x.val
+}
+
+func TestStringerToString(t *testing.T) {
+
+	var x foo
+	x.val = "bar"
+	assert.Equal(t, "bar", ToString(x))
+}
+
+type fu struct {
+	val string
+}
+
+func (x fu) Error() string {
+	return x.val
+}
+
+func TestErrorToString(t *testing.T) {
+	var x fu
+	x.val = "bar"
+	assert.Equal(t, "bar", ToString(x))
+}
+
+func TestMaps(t *testing.T) {
+	var taxonomies = map[interface{}]interface{}{"tag": "tags", "group": "groups"}
+	var stringMapBool = map[interface{}]interface{}{"v1": true, "v2": false}
+
+	// ToStringMapString inputs/outputs
+	var stringMapString = map[string]string{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
+	var stringMapInterface = map[string]interface{}{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
+	var interfaceMapString = map[interface{}]string{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
+	var interfaceMapInterface = map[interface{}]interface{}{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
+
+	// ToStringMapStringSlice inputs/outputs
+	var stringMapStringSlice = map[string][]string{"key 1": []string{"value 1", "value 2", "value 3"}, "key 2": []string{"value 1", "value 2", "value 3"}, "key 3": []string{"value 1", "value 2", "value 3"}}
+	var stringMapInterfaceSlice = map[string][]interface{}{"key 1": []interface{}{"value 1", "value 2", "value 3"}, "key 2": []interface{}{"value 1", "value 2", "value 3"}, "key 3": []interface{}{"value 1", "value 2", "value 3"}}
+	var stringMapStringSingleSliceFieldsResult = map[string][]string{"key 1": []string{"value", "1"}, "key 2": []string{"value", "2"}, "key 3": []string{"value", "3"}}
+	var interfaceMapStringSlice = map[interface{}][]string{"key 1": []string{"value 1", "value 2", "value 3"}, "key 2": []string{"value 1", "value 2", "value 3"}, "key 3": []string{"value 1", "value 2", "value 3"}}
+	var interfaceMapInterfaceSlice = map[interface{}][]interface{}{"key 1": []interface{}{"value 1", "value 2", "value 3"}, "key 2": []interface{}{"value 1", "value 2", "value 3"}, "key 3": []interface{}{"value 1", "value 2", "value 3"}}
+
+	var stringMapStringSliceMultiple = map[string][]string{"key 1": []string{"value 1", "value 2", "value 3"}, "key 2": []string{"value 1", "value 2", "value 3"}, "key 3": []string{"value 1", "value 2", "value 3"}}
+	var stringMapStringSliceSingle = map[string][]string{"key 1": []string{"value 1"}, "key 2": []string{"value 2"}, "key 3": []string{"value 3"}}
+
+	assert.Equal(t, ToStringMap(taxonomies), map[string]interface{}{"tag": "tags", "group": "groups"})
+	assert.Equal(t, ToStringMapBool(stringMapBool), map[string]bool{"v1": true, "v2": false})
+
+	// ToStringMapString tests
+	assert.Equal(t, ToStringMapString(stringMapString), stringMapString)
+	assert.Equal(t, ToStringMapString(stringMapInterface), stringMapString)
+	assert.Equal(t, ToStringMapString(interfaceMapString), stringMapString)
+	assert.Equal(t, ToStringMapString(interfaceMapInterface), stringMapString)
+
+	// ToStringMapStringSlice tests
+	assert.Equal(t, ToStringMapStringSlice(stringMapStringSlice), stringMapStringSlice)
+	assert.Equal(t, ToStringMapStringSlice(stringMapInterfaceSlice), stringMapStringSlice)
+	assert.Equal(t, ToStringMapStringSlice(stringMapStringSliceMultiple), stringMapStringSlice)
+	assert.Equal(t, ToStringMapStringSlice(stringMapStringSliceMultiple), stringMapStringSlice)
+	assert.Equal(t, ToStringMapStringSlice(stringMapString), stringMapStringSliceSingle)
+	assert.Equal(t, ToStringMapStringSlice(stringMapInterface), stringMapStringSliceSingle)
+	assert.Equal(t, ToStringMapStringSlice(interfaceMapStringSlice), stringMapStringSlice)
+	assert.Equal(t, ToStringMapStringSlice(interfaceMapInterfaceSlice), stringMapStringSlice)
+	assert.Equal(t, ToStringMapStringSlice(interfaceMapString), stringMapStringSingleSliceFieldsResult)
+	assert.Equal(t, ToStringMapStringSlice(interfaceMapInterface), stringMapStringSingleSliceFieldsResult)
+}
+
+func TestSlices(t *testing.T) {
+	assert.Equal(t, []string{"a", "b"}, ToStringSlice([]string{"a", "b"}))
+	assert.Equal(t, []string{"1", "3"}, ToStringSlice([]interface{}{1, 3}))
+	assert.Equal(t, []int{1, 3}, ToIntSlice([]int{1, 3}))
+	assert.Equal(t, []int{1, 3}, ToIntSlice([]interface{}{1.2, 3.2}))
+	assert.Equal(t, []int{2, 3}, ToIntSlice([]string{"2", "3"}))
+	assert.Equal(t, []int{2, 3}, ToIntSlice([2]string{"2", "3"}))
+}
+
+func TestToBool(t *testing.T) {
+	assert.Equal(t, ToBool(0), false)
+	assert.Equal(t, ToBool(nil), false)
+	assert.Equal(t, ToBool("false"), false)
+	assert.Equal(t, ToBool("FALSE"), false)
+	assert.Equal(t, ToBool("False"), false)
+	assert.Equal(t, ToBool("f"), false)
+	assert.Equal(t, ToBool("F"), false)
+	assert.Equal(t, ToBool(false), false)
+	assert.Equal(t, ToBool("foo"), false)
+
+	assert.Equal(t, ToBool("true"), true)
+	assert.Equal(t, ToBool("TRUE"), true)
+	assert.Equal(t, ToBool("True"), true)
+	assert.Equal(t, ToBool("t"), true)
+	assert.Equal(t, ToBool("T"), true)
+	assert.Equal(t, ToBool(1), true)
+	assert.Equal(t, ToBool(true), true)
+	assert.Equal(t, ToBool(-1), true)
+}
+
+func TestIndirectPointers(t *testing.T) {
+	x := 13
+	y := &x
+	z := &y
+
+	assert.Equal(t, ToInt(y), 13)
+	assert.Equal(t, ToInt(z), 13)
+}
+
+func TestToDuration(t *testing.T) {
+	a := time.Second * 5
+	ai := int64(a)
+	b := time.Second * 5
+	bf := float64(b)
+	assert.Equal(t, ToDuration(ai), a)
+	assert.Equal(t, ToDuration(bf), b)
+}

vendor/github.com/spf13/cast/caste.go

@@ -0,0 +1,456 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import (
+	"fmt"
+	"html/template"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+
+	jww "github.com/spf13/jwalterweatherman"
+)
+
+// ToTimeE casts an empty interface to time.Time.
+func ToTimeE(i interface{}) (tim time.Time, err error) {
+	i = indirect(i)
+	jww.DEBUG.Println("ToTimeE called on type:", reflect.TypeOf(i))
+
+	switch s := i.(type) {
+	case time.Time:
+		return s, nil
+	case string:
+		d, e := StringToDate(s)
+		if e == nil {
+			return d, nil
+		}
+		return time.Time{}, fmt.Errorf("Could not parse Date/Time format: %v\n", e)
+	default:
+		return time.Time{}, fmt.Errorf("Unable to Cast %#v to Time\n", i)
+	}
+}
+
+// ToDurationE casts an empty interface to time.Duration.
+func ToDurationE(i interface{}) (d time.Duration, err error) {
+	i = indirect(i)
+	jww.DEBUG.Println("ToDurationE called on type:", reflect.TypeOf(i))
+
+	switch s := i.(type) {
+	case time.Duration:
+		return s, nil
+	case int64:
+		d = time.Duration(s)
+		return
+	case float64:
+		d = time.Duration(s)
+		return
+	case string:
+		d, err = time.ParseDuration(s)
+		return
+	default:
+		err = fmt.Errorf("Unable to Cast %#v to Duration\n", i)
+		return
+	}
+}
+
+// ToBoolE casts an empty interface to a bool.
+func ToBoolE(i interface{}) (bool, error) {
+	i = indirect(i)
+	jww.DEBUG.Println("ToBoolE called on type:", reflect.TypeOf(i))
+
+	switch b := i.(type) {
+	case bool:
+		return b, nil
+	case nil:
+		return false, nil
+	case int:
+		if i.(int) != 0 {
+			return true, nil
+		}
+		return false, nil
+	case string:
+		return strconv.ParseBool(i.(string))
+	default:
+		return false, fmt.Errorf("Unable to Cast %#v to bool", i)
+	}
+}
+
+// ToFloat64E casts an empty interface to a float64.
+func ToFloat64E(i interface{}) (float64, error) {
+	i = indirect(i)
+	jww.DEBUG.Println("ToFloat64E called on type:", reflect.TypeOf(i))
+
+	switch s := i.(type) {
+	case float64:
+		return s, nil
+	case float32:
+		return float64(s), nil
+	case int64:
+		return float64(s), nil
+	case int32:
+		return float64(s), nil
+	case int16:
+		return float64(s), nil
+	case int8:
+		return float64(s), nil
+	case int:
+		return float64(s), nil
+	case string:
+		v, err := strconv.ParseFloat(s, 64)
+		if err == nil {
+			return float64(v), nil
+		}
+		return 0.0, fmt.Errorf("Unable to Cast %#v to float", i)
+	default:
+		return 0.0, fmt.Errorf("Unable to Cast %#v to float", i)
+	}
+}
+
+// ToIntE casts an empty interface to an int.
+func ToIntE(i interface{}) (int, error) {
+	i = indirect(i)
+	jww.DEBUG.Println("ToIntE called on type:", reflect.TypeOf(i))
+
+	switch s := i.(type) {
+	case int:
+		return s, nil
+	case int64:
+		return int(s), nil
+	case int32:
+		return int(s), nil
+	case int16:
+		return int(s), nil
+	case int8:
+		return int(s), nil
+	case string:
+		v, err := strconv.ParseInt(s, 0, 0)
+		if err == nil {
+			return int(v), nil
+		}
+		return 0, fmt.Errorf("Unable to Cast %#v to int", i)
+	case float64:
+		return int(s), nil
+	case bool:
+		if bool(s) {
+			return 1, nil
+		}
+		return 0, nil
+	case nil:
+		return 0, nil
+	default:
+		return 0, fmt.Errorf("Unable to Cast %#v to int", i)
+	}
+}
+
+// From html/template/content.go
+// Copyright 2011 The Go Authors. All rights reserved.
+// indirect returns the value, after dereferencing as many times
+// as necessary to reach the base type (or nil).
+func indirect(a interface{}) interface{} {
+	if a == nil {
+		return nil
+	}
+	if t := reflect.TypeOf(a); t.Kind() != reflect.Ptr {
+		// Avoid creating a reflect.Value if it's not a pointer.
+		return a
+	}
+	v := reflect.ValueOf(a)
+	for v.Kind() == reflect.Ptr && !v.IsNil() {
+		v = v.Elem()
+	}
+	return v.Interface()
+}
+
+// From html/template/content.go
+// Copyright 2011 The Go Authors. All rights reserved.
+// indirectToStringerOrError returns the value, after dereferencing as many times
+// as necessary to reach the base type (or nil) or an implementation of fmt.Stringer
+// or error,
+func indirectToStringerOrError(a interface{}) interface{} {
+	if a == nil {
+		return nil
+	}
+
+	var errorType = reflect.TypeOf((*error)(nil)).Elem()
+	var fmtStringerType = reflect.TypeOf((*fmt.Stringer)(nil)).Elem()
+
+	v := reflect.ValueOf(a)
+	for !v.Type().Implements(fmtStringerType) && !v.Type().Implements(errorType) && v.Kind() == reflect.Ptr && !v.IsNil() {
+		v = v.Elem()
+	}
+	return v.Interface()
+}
+
+// ToStringE casts an empty interface to a string.
+func ToStringE(i interface{}) (string, error) {
+	i = indirectToStringerOrError(i)
+	jww.DEBUG.Println("ToStringE called on type:", reflect.TypeOf(i))
+
+	switch s := i.(type) {
+	case string:
+		return s, nil
+	case bool:
+		return strconv.FormatBool(s), nil
+	case float64:
+		return strconv.FormatFloat(i.(float64), 'f', -1, 64), nil
+	case int:
+		return strconv.FormatInt(int64(i.(int)), 10), nil
+	case []byte:
+		return string(s), nil
+	case template.HTML:
+		return string(s), nil
+	case template.URL:
+		return string(s), nil
+	case nil:
+		return "", nil
+	case fmt.Stringer:
+		return s.String(), nil
+	case error:
+		return s.Error(), nil
+	default:
+		return "", fmt.Errorf("Unable to Cast %#v to string", i)
+	}
+}
+
+// ToStringMapStringE casts an empty interface to a map[string]string.
+func ToStringMapStringE(i interface{}) (map[string]string, error) {
+	jww.DEBUG.Println("ToStringMapStringE called on type:", reflect.TypeOf(i))
+
+	var m = map[string]string{}
+
+	switch v := i.(type) {
+	case map[string]string:
+		return v, nil
+	case map[string]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToString(val)
+		}
+		return m, nil
+	case map[interface{}]string:
+		for k, val := range v {
+			m[ToString(k)] = ToString(val)
+		}
+		return m, nil
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToString(val)
+		}
+		return m, nil
+	default:
+		return m, fmt.Errorf("Unable to Cast %#v to map[string]string", i)
+	}
+}
+
+// ToStringMapStringSliceE casts an empty interface to a map[string][]string.
+func ToStringMapStringSliceE(i interface{}) (map[string][]string, error) {
+	jww.DEBUG.Println("ToStringMapStringSliceE called on type:", reflect.TypeOf(i))
+
+	var m = map[string][]string{}
+
+	switch v := i.(type) {
+	case map[string][]string:
+		return v, nil
+	case map[string][]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToStringSlice(val)
+		}
+		return m, nil
+	case map[string]string:
+		for k, val := range v {
+			m[ToString(k)] = []string{val}
+		}
+	case map[string]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = []string{ToString(val)}
+		}
+		return m, nil
+	case map[interface{}][]string:
+		for k, val := range v {
+			m[ToString(k)] = ToStringSlice(val)
+		}
+		return m, nil
+	case map[interface{}]string:
+		for k, val := range v {
+			m[ToString(k)] = ToStringSlice(val)
+		}
+		return m, nil
+	case map[interface{}][]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToStringSlice(val)
+		}
+		return m, nil
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			key, err := ToStringE(k)
+			if err != nil {
+				return m, fmt.Errorf("Unable to Cast %#v to map[string][]string", i)
+			}
+			value, err := ToStringSliceE(val)
+			if err != nil {
+				return m, fmt.Errorf("Unable to Cast %#v to map[string][]string", i)
+			}
+			m[key] = value
+		}
+	default:
+		return m, fmt.Errorf("Unable to Cast %#v to map[string][]string", i)
+	}
+	return m, nil
+}
+
+// ToStringMapBoolE casts an empty interface to a map[string]bool.
+func ToStringMapBoolE(i interface{}) (map[string]bool, error) {
+	jww.DEBUG.Println("ToStringMapBoolE called on type:", reflect.TypeOf(i))
+
+	var m = map[string]bool{}
+
+	switch v := i.(type) {
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToBool(val)
+		}
+		return m, nil
+	case map[string]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToBool(val)
+		}
+		return m, nil
+	case map[string]bool:
+		return v, nil
+	default:
+		return m, fmt.Errorf("Unable to Cast %#v to map[string]bool", i)
+	}
+}
+
+// ToStringMapE casts an empty interface to a map[string]interface{}.
+func ToStringMapE(i interface{}) (map[string]interface{}, error) {
+	jww.DEBUG.Println("ToStringMapE called on type:", reflect.TypeOf(i))
+
+	var m = map[string]interface{}{}
+
+	switch v := i.(type) {
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = val
+		}
+		return m, nil
+	case map[string]interface{}:
+		return v, nil
+	default:
+		return m, fmt.Errorf("Unable to Cast %#v to map[string]interface{}", i)
+	}
+}
+
+// ToSliceE casts an empty interface to a []interface{}.
+func ToSliceE(i interface{}) ([]interface{}, error) {
+	jww.DEBUG.Println("ToSliceE called on type:", reflect.TypeOf(i))
+
+	var s []interface{}
+
+	switch v := i.(type) {
+	case []interface{}:
+		for _, u := range v {
+			s = append(s, u)
+		}
+		return s, nil
+	case []map[string]interface{}:
+		for _, u := range v {
+			s = append(s, u)
+		}
+		return s, nil
+	default:
+		return s, fmt.Errorf("Unable to Cast %#v of type %v to []interface{}", i, reflect.TypeOf(i))
+	}
+}
+
+// ToStringSliceE casts an empty interface to a []string.
+func ToStringSliceE(i interface{}) ([]string, error) {
+	jww.DEBUG.Println("ToStringSliceE called on type:", reflect.TypeOf(i))
+
+	var a []string
+
+	switch v := i.(type) {
+	case []interface{}:
+		for _, u := range v {
+			a = append(a, ToString(u))
+		}
+		return a, nil
+	case []string:
+		return v, nil
+	case string:
+		return strings.Fields(v), nil
+	case interface{}:
+		str, err := ToStringE(v)
+		if err != nil {
+			return a, fmt.Errorf("Unable to Cast %#v to []string", i)
+		}
+		return []string{str}, nil
+	default:
+		return a, fmt.Errorf("Unable to Cast %#v to []string", i)
+	}
+}
+
+// ToIntSliceE casts an empty interface to a []int.
+func ToIntSliceE(i interface{}) ([]int, error) {
+	jww.DEBUG.Println("ToIntSliceE called on type:", reflect.TypeOf(i))
+
+	if i == nil {
+		return []int{}, fmt.Errorf("Unable to Cast %#v to []int", i)
+	}
+
+	switch v := i.(type) {
+	case []int:
+		return v, nil
+	}
+
+	kind := reflect.TypeOf(i).Kind()
+	switch kind {
+	case reflect.Slice, reflect.Array:
+		s := reflect.ValueOf(i)
+		a := make([]int, s.Len())
+		for j := 0; j < s.Len(); j++ {
+			val, err := ToIntE(s.Index(j).Interface())
+			if err != nil {
+				return []int{}, fmt.Errorf("Unable to Cast %#v to []int", i)
+			}
+			a[j] = val
+		}
+		return a, nil
+	default:
+		return []int{}, fmt.Errorf("Unable to Cast %#v to []int", i)
+	}
+}
+
+// StringToDate casts an empty interface to a time.Time.
+func StringToDate(s string) (time.Time, error) {
+	return parseDateWith(s, []string{
+		time.RFC3339,
+		"2006-01-02T15:04:05", // iso8601 without timezone
+		time.RFC1123Z,
+		time.RFC1123,
+		time.RFC822Z,
+		time.RFC822,
+		time.ANSIC,
+		time.UnixDate,
+		time.RubyDate,
+		"2006-01-02 15:04:05Z07:00",
+		"02 Jan 06 15:04 MST",
+		"2006-01-02",
+		"02 Jan 2006",
+		"2006-01-02 15:04:05 -07:00",
+		"2006-01-02 15:04:05 -0700",
+	})
+}
+
+func parseDateWith(s string, dates []string) (d time.Time, e error) {
+	for _, dateType := range dates {
+		if d, e = time.Parse(dateType, s); e == nil {
+			return
+		}
+	}
+	return d, fmt.Errorf("Unable to parse date: %s", s)
+}