graphql-lua

GraphQL Lua

Lua implementation of GraphQL parser using LPeg. Experimental.

Example

require 'parse' [[{
  me {
    firstName
    lastName
  }
}]]

Gives you this scary table:

{
  kind = "document",
  definitions = {
    {
      kind = "operation",
      operation = "query",
      selectionSet = {
        kind = "selectionSet",
        selections = {
          {
            kind = "field",
            name = {
              kind = "name",
              value = "me"
            },
            selectionSet = {
              kind = "selectionSet",
              selections = {
                {
                  kind = "field",
                  name = {
                    kind = "name",
                    value = "firstName"
                  }
                },
                {
                  kind = "field",
                  name = {
                    kind = "name",
                    value = "lastName"
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

Status

The parser can parse virtually all of the query syntax:

• Documents
• Definitions
  • OperationDefinition
  • FragmentDefinition
• Selections
• Fields
• Aliases
• Arguments
• FragmentSpreads and InlineFragments
• All value types (scalars, enums, lists, objects, variables).
• VariableDefinitions (typed)
• Directives

The type system supports scalars, objects, enums, input objects, interfaces, and unions. The built in scalars are also provided (ints, floats, strings, etc.), as well as the two wrapper types (non null and list).

License

MIT