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Merge pull request #956 from sfackler/int-field

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Support deserialization of struct keys from integers
This commit is contained in:
David Tolnay 2017-06-17 18:26:45 -07:00 committed by GitHub
commit b37d47c987
2 changed files with 25 additions and 19 deletions
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33
serde_derive/src/de.rs
View File

@ -1386,26 +1386,21 @@ fn deserialize_identifier(
"field identifier"
};
let visit_index = if is_variant {
let variant_indices = 0u32..;
let fallthrough_msg = format!("variant index 0 <= i < {}", fields.len());
let visit_index = quote! {
fn visit_u32<__E>(self, __value: u32) -> _serde::export::Result<Self::Value, __E>
where __E: _serde::de::Error
{
match __value {
#(
#variant_indices => _serde::export::Ok(#constructors),
)*
_ => _serde::export::Err(_serde::de::Error::invalid_value(
_serde::de::Unexpected::Unsigned(__value as u64),
&#fallthrough_msg))
}
let variant_indices = 0u32..;
let fallthrough_msg = format!("variant index 0 <= i < {}", fields.len());
let visit_index = quote! {
fn visit_u32<__E>(self, __value: u32) -> _serde::export::Result<Self::Value, __E>
where __E: _serde::de::Error
{
match __value {
#(
#variant_indices => _serde::export::Ok(#constructors),
)*
_ => _serde::export::Err(_serde::de::Error::invalid_value(
_serde::de::Unexpected::Unsigned(__value as u64),
&#fallthrough_msg))
}
};
Some(visit_index)
} else {
None
}
};
let bytes_to_str = if fallthrough.is_some() {

11
test_suite/tests/test_de.rs
View File

@ -605,6 +605,17 @@ declare_tests! {
Token::StructEnd,
],
}
test_struct_integer_keys {
Struct { a: 1, b: 2, c: 0 } => &[
Token::Struct { name: "Struct", len: 2 },
Token::U32(0),
Token::I32(1),
Token::U32(1),
Token::I32(2),
Token::StructEnd,
],
}
test_enum_unit {
Enum::Unit => &[
Token::UnitVariant { name: "Enum", variant: "Unit" },