class

Grammar

local Grammar = require "ion7.grammar"

-- From a Lua type annotation
local g = Grammar.from_type({ name = "string", age = "integer" })
local gbnf = g:to_gbnf()

-- From a JSON Schema
local g2 = Grammar.from_json_schema({ type = "object",
    properties = { status = { enum = { "ok", "error" } } },
    required = { "status" },
})

-- From an ABNF rulelist
local g3 = Grammar.from_abnf([[
    date = year "-" month "-" day
    year = 4DIGIT
    month = 2DIGIT
    day = 2DIGIT
]])

-- Compose grammars
local union   = g:union(g2)
local wrapped = g:then_(Grammar.from_regex("\\d+"))

Functions