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# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.
from typing import List, Union
import generator.model as model
from .rust_commons import TypeData, generate_extras
from .rust_lang_utils import indent_lines, lines_to_doc_comments, to_upper_camel_case
def _get_enum_docs(enum: Union[model.Enum, model.EnumItem]) -> List[str]:
doc = enum.documentation.splitlines(keepends=False) if enum.documentation else []
return lines_to_doc_comments(doc)
def generate_serde(enum: model.Enum) -> List[str]:
ser = [
f"impl Serialize for {enum.name} {{",
"fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer,{",
"match self {",
]
de = [
f"impl<'de> Deserialize<'de> for {enum.name} {{",
f"fn deserialize<D>(deserializer: D) -> Result<{enum.name}, D::Error> where D: serde::Deserializer<'de>,"
"{",
"let value = i32::deserialize(deserializer)?;",
"match value {",
]
for item in enum.values:
full_name = f"{enum.name}::{to_upper_camel_case(item.name)}"
ser += [f"{full_name} => serializer.serialize_i32({item.value}),"]
de += [f"{item.value} => Ok({full_name}),"]
ser += [
"}", # match
"}", # fn
"}", # impl
]
de += [
'_ => Err(serde::de::Error::custom("Unexpected value"))',
"}", # match
"}", # fn
"}", # impl
]
return ser + de
def generate_enum(enum: model.Enum, types: TypeData) -> None:
is_int = all(isinstance(item.value, int) for item in enum.values)
lines = _get_enum_docs(enum) + generate_extras(enum)
if is_int:
lines += ["#[derive(PartialEq, Debug, Eq, Clone)]"]
else:
lines += ["#[derive(Serialize, Deserialize, PartialEq, Debug, Eq, Clone)]"]
lines += [f"pub enum {enum.name} {{"]
for item in enum.values:
if is_int:
field = [
f"{to_upper_camel_case(item.name)} = {item.value},",
]
else:
field = [
f'#[serde(rename = "{item.value}")]',
f"{to_upper_camel_case(item.name)},",
]
lines += indent_lines(
_get_enum_docs(item) + generate_extras(item) + field + [""]
)
lines += ["}"]
if is_int:
lines += generate_serde(enum)
types.add_type_info(enum, enum.name, lines)
def generate_enums(enums: List[model.Enum], types: TypeData) -> None:
for enum in enums:
generate_enum(enum, types)
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