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from __future__ import absolute_import, division, print_function, unicode_literals
import pprint
from stone.ir import (
Boolean,
Bytes,
Float32,
Float64,
Int32,
Int64,
List,
String,
Timestamp,
UInt32,
UInt64,
Void,
is_boolean_type,
is_list_type,
is_numeric_type,
is_string_type,
is_tag_ref,
is_user_defined_type,
unwrap_nullable,
)
from .helpers import split_words
# This file defines *stylistic* choices for Swift
# (ie, that class names are UpperCamelCase and that variables are lowerCamelCase)
_type_table = {
Boolean: 'Bool',
Bytes: 'Data',
Float32: 'Float',
Float64: 'Double',
Int32: 'Int32',
Int64: 'Int64',
List: 'Array',
String: 'String',
Timestamp: 'Date',
UInt32: 'UInt32',
UInt64: 'UInt64',
Void: 'Void',
}
_reserved_words = {
'description',
'bool',
'nsdata'
'float',
'double',
'int32',
'int64',
'list',
'string',
'timestamp',
'uint32',
'uint64',
'void',
'associatedtype',
'class',
'deinit',
'enum',
'extension',
'func',
'import',
'init',
'inout',
'internal',
'let',
'operator',
'private',
'protocol',
'public',
'static',
'struct',
'subscript',
'typealias',
'var',
'default',
}
def fmt_obj(o):
assert not isinstance(o, dict), "Only use for base type literals"
if o is True:
return 'true'
if o is False:
return 'false'
if o is None:
return 'nil'
if o == '':
return '""'
return pprint.pformat(o, width=1)
def _format_camelcase(name, lower_first=True):
words = [word.capitalize() for word in split_words(name)]
if lower_first:
words[0] = words[0].lower()
ret = ''.join(words)
if ret.lower() in _reserved_words:
ret += '_'
return ret
def fmt_class(name):
return _format_camelcase(name, lower_first=False)
def fmt_func(name, version):
if version > 1:
name = '{}_v{}'.format(name, version)
name = _format_camelcase(name)
return name
def fmt_type(data_type):
data_type, nullable = unwrap_nullable(data_type)
if is_user_defined_type(data_type):
result = '{}.{}'.format(fmt_class(data_type.namespace.name),
fmt_class(data_type.name))
else:
result = _type_table.get(data_type.__class__, fmt_class(data_type.name))
if is_list_type(data_type):
result = result + '<{}>'.format(fmt_type(data_type.data_type))
return result if not nullable else result + '?'
def fmt_var(name):
return _format_camelcase(name)
def fmt_default_value(namespace, field):
if is_tag_ref(field.default):
return '{}.{}Serializer().serialize(.{})'.format(
fmt_class(namespace.name),
fmt_class(field.default.union_data_type.name),
fmt_var(field.default.tag_name))
elif is_list_type(field.data_type):
return '.array({})'.format(field.default)
elif is_numeric_type(field.data_type):
return '.number({})'.format(field.default)
elif is_string_type(field.data_type):
return '.str({})'.format(fmt_obj(field.default))
elif is_boolean_type(field.data_type):
if field.default:
bool_str = '1'
else:
bool_str = '0'
return '.number({})'.format(bool_str)
else:
raise TypeError('Can\'t handle default value type %r' %
type(field.data_type))
def check_route_name_conflict(namespace):
"""
Check name conflicts among generated route definitions. Raise a runtime exception when a
conflict is encountered.
"""
route_by_name = {}
for route in namespace.routes:
route_name = fmt_func(route.name, route.version)
if route_name in route_by_name:
other_route = route_by_name[route_name]
raise RuntimeError(
'There is a name conflict between {!r} and {!r}'.format(other_route, route))
route_by_name[route_name] = route
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