package step

import "html/template"

// FuncProvider provides a template.FuncMap.
type FuncProvider interface {
	// FuncMap provides a template.FuncMap. It may return nil, in which case
	// its result is simply not considered.
	FuncMap () template.FuncMap
}

// FuncProviderFor is an object that provides a template.FuncMap for a specific
// document.
type FuncProviderFor interface {
	FuncProvider
	// FuncMap provides a template.FuncMap, given a particular document. It
	// may return nil, in which case its result is simply not considered.
	FuncMapFor (*Document) template.FuncMap
}