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# Formal Grammar of the schema language
schema = include*
( namespace\_decl | type\_decl | enum\_decl | root\_decl |
file_extension_decl | file_identifier_decl |
attribute\_decl | object )*
include = `include` string\_constant `;`
namespace\_decl = `namespace` ident ( `.` ident )* `;`
attribute\_decl = `attribute` string\_constant `;`
type\_decl = ( `table` | `struct` ) ident metadata `{` field\_decl+ `}`
enum\_decl = ( `enum` | `union` ) ident [ `:` type ] metadata `{` commasep(
enumval\_decl ) `}`
root\_decl = `root_type` ident `;`
field\_decl = ident `:` type [ `=` scalar ] metadata `;`
type = `bool` | `byte` | `ubyte` | `short` | `ushort` | `int` | `uint` |
`float` | `long` | `ulong` | `double`
| `string` | `[` type `]` | ident
enumval\_decl = ident [ `=` integer\_constant ]
metadata = [ `(` commasep( ident [ `:` scalar ] ) `)` ]
scalar = integer\_constant | float\_constant | `true` | `false`
object = { commasep( ident `:` value ) }
value = scalar | object | string\_constant | `[` commasep( value ) `]`
commasep(x) = [ x ( `,` x )\* ]
file_extension_decl = `file_extension` string\_constant `;`
file_identifier_decl = `file_identifier` string\_constant `;`
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