1.7 KiB
Grammar of the schema language
schema = include* ( namespace_decl | type_decl | enum_decl | root_decl | file_extension_decl | file_identifier_decl | attribute_decl | rpc_decl | object )*
include = include string_constant ;
namespace_decl = namespace ident ( . ident )* ;
attribute_decl = attribute ident | "ident" ;
type_decl = ( table | struct ) ident metadata { field_decl+ }
enum_decl = ( enum ident [ : type ] | union ident ) metadata {
commasep( enumval_decl ) }
root_decl = root_type ident ;
field_decl = ident : type [ = scalar ] metadata ;
rpc_decl = rpc_service ident { rpc_method+ }
rpc_method = ident ( ident ) : ident metadata ;
type = bool | byte | ubyte | short | ushort | int | uint |
float | long | ulong | double |
int8 | uint8 | int16 | uint16 | int32 | uint32| int64 | uint64 |
float32 | float64 |
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]+)?
string_constant = \".*?\"
ident = [a-zA-Z_][a-zA-Z0-9_]*