default

let's make a default term that we can re-use when making other terms.

by default, terms bite off nothing.

Term.Default = {
	bite() {
		return [""]
	}
}

by default, terms emit their bites.

Term.Default = {
	//...
	translate(text) {
		const bites = this.bite(text)
		if (bites.length === 0) {
			throw new Error(`Expected something but found '${text}'!`)
		}
		return bites.join("")
	}
}

then we can use the default term to make our string term shorter.

Term.string = (string) => ({
	...Term.Default,
	bite(text) {
		return text.startsWith(string) ? [string] : []
	}
})

here it is in action.

back to the dream