prosper/words.go

package main

import "fmt"

// Dictionary is a simple map of names to words
type Dictionary map[string]Word

// A Word defines a subroutine
type Word struct {
	Name      string
	Impl      func() error
	Source    []string
	Immediate bool
}

// AddWord inserts a new word into the dictonary, optionally overwriting the existing word
func (d Dictionary) AddWord(name string, impl func() error, source []string, immediate bool) {
	d[name] = Word{
		Name:      name,
		Impl:      impl,
		Source:    source,
		Immediate: immediate,
	}
}

// GetWord returns a word from the dictionary or an error if it's undefined
func (d Dictionary) GetWord(name string) (Word, error) {
	w, ok := d[name]
	if !ok {
		return Word{
			Name: name,
		}, fmt.Errorf("no word found")
	}
	return w, nil
}