1.4 KiB
Executable File
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 [ : single_value ] ) ) ]
scalar = integer_constant | float_constant
object = { commasep( ident : value ) }
single_value = scalar | string_constant
value = single_value | object | [ commasep( value ) ]
commasep(x) = [ x ( , x )* ]
file_extension_decl = file_extension string_constant ;
file_identifier_decl = file_identifier string_constant ;
integer_constant = -?[0-9]+ | true | false
float_constant = -?[0-9]+.[0-9]+((e|E)(+|-)?[0-9]+)?