tpl: Make the Namespace func signature explicit

This makes it cleaner and avoids breaking client code, such as the docs helper JSON generator.

tpl/cast/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.ToInt,

tpl/cast/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/collections/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.After,

tpl/collections/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/compare/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Default,

tpl/compare/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/crypto/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.MD5,

tpl/crypto/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/data/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.GetCSV,

tpl/data/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/encoding/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Base64Decode,

tpl/encoding/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/fmt/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Print,

tpl/fmt/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/images/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Config,

tpl/images/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/inflect/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Humanize,

tpl/inflect/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/internal/templatefuncsRegistry.go

@@ -45,7 +45,7 @@ type TemplateFuncsNamespace struct {
 	Name string
 
 	// This is the method receiver.
-	Context interface{}
+	Context func(v ...interface{}) interface{}
 
 	// Additional info, aliases and examples, per method name.
 	MethodMappings map[string]TemplateFuncMethodMapping
@@ -165,7 +165,7 @@ func (t *TemplateFuncsNamespace) toJSON() ([]byte, error) {
 
 	buf.WriteString(fmt.Sprintf(`%q: {`, t.Name))
 
-	ctx := t.Context.(func() interface{})()
+	ctx := t.Context()
 	ctxType := reflect.TypeOf(ctx)
 	for i := 0; i < ctxType.NumMethod(); i++ {
 		method := ctxType.Method(i)

tpl/lang/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Translate,

tpl/lang/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/math/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Add,

tpl/math/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/os/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Getenv,

tpl/os/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/partials/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Include,

tpl/partials/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/safe/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.CSS,

tpl/safe/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/strings/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Chomp,

tpl/strings/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/time/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name: name,
-			Context: func(v ...interface{}) interface{} {
+			Context: func(args ...interface{}) interface{} {
 				// Handle overlapping "time" namespace and func.
 				//
 				// If no args are passed to `time`, assume namespace usage and
@@ -34,11 +34,11 @@ func init() {
 				//
 				// If args are passed, call AsTime().
 
-				if len(v) == 0 {
+				if len(args) == 0 {
 					return ctx
 				}
 
-				t, err := ctx.AsTime(v[0])
+				t, err := ctx.AsTime(args[0])
 				if err != nil {
 					return err
 				}

tpl/time/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func(v ...interface{}) interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/transform/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.Emojify,

tpl/transform/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }

tpl/urls/init.go

@@ -26,7 +26,7 @@ func init() {
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
-			Context: func() interface{} { return ctx },
+			Context: func(args ...interface{}) interface{} { return ctx },
 		}
 
 		ns.AddMethodMapping(ctx.AbsURL,

tpl/urls/init_test.go

@@ -34,5 +34,5 @@ func TestInit(t *testing.T) {
 	}
 
 	require.True(t, found)
-	require.IsType(t, &Namespace{}, ns.Context.(func() interface{})())
+	require.IsType(t, &Namespace{}, ns.Context())
 }