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[Rust] Add ENUM_VALUES generation for bit_flags enums #8835

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[Rust] Add ENUM_VALUES generation for bit_flags enums #8835

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b1f1633
[Rust] Add ENUM_VALUES generation for bit_flags enums
wentywenty Dec 7, 2025
518aa5b
Merge branch 'master' into feature/rust-bitflags-enum-values
wentywenty Dec 10, 2025
d034ae6
Merge branch 'master' into feature/rust-bitflags-enum-values
jtdavis777 Dec 14, 2025
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9 changes: 9 additions & 0 deletions src/idl_gen_rust.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -742,6 +742,15 @@ class RustGenerator : public BaseGenerator {
code_ += "pub use self::bitflags_{{ENUM_NAMESPACE}}::{{ENUM_TY}};";
code_ += "";

code_ += "impl {{ENUM_TY}} {";
code_ += " pub const ENUM_VALUES: &'static [Self] = &[";
ForAllEnumValues1(enum_def, [&](const EnumVal& ev) {
code_.SetValue("VARIANT", namer_.Variant(ev));
code_ += " Self::{{VARIANT}},";
});
code_ += " ];";
code_ += "}";

code_.SetValue("INTO_BASE", "self.bits()");
} else {
// Normal, c-modelled enums.
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7 changes: 7 additions & 0 deletions tests/monster_test/my_game/example/color_generated.rs
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Expand Up @@ -19,6 +19,13 @@ mod bitflags_color {
}
pub use self::bitflags_color::Color;

impl Color {
pub const ENUM_VALUES: &'static [Self] = &[
Self::Red,
Self::Green,
Self::Blue,
];
}
impl<'a> ::flatbuffers::Follow<'a> for Color {
type Inner = Self;
#[inline]
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7 changes: 7 additions & 0 deletions tests/monster_test/my_game/example/long_enum_generated.rs
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Expand Up @@ -15,6 +15,13 @@ mod bitflags_long_enum {
}
pub use self::bitflags_long_enum::LongEnum;

impl LongEnum {
pub const ENUM_VALUES: &'static [Self] = &[
Self::LongOne,
Self::LongTwo,
Self::LongBig,
];
}
impl<'a> ::flatbuffers::Follow<'a> for LongEnum {
type Inner = Self;
#[inline]
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7 changes: 7 additions & 0 deletions tests/monster_test_serialize/my_game/example/color_generated.rs
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Expand Up @@ -21,6 +21,13 @@ mod bitflags_color {
}
pub use self::bitflags_color::Color;

impl Color {
pub const ENUM_VALUES: &'static [Self] = &[
Self::Red,
Self::Green,
Self::Blue,
];
}
impl Serialize for Color {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
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7 changes: 7 additions & 0 deletions tests/monster_test_serialize/my_game/example/long_enum_generated.rs
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Expand Up @@ -17,6 +17,13 @@ mod bitflags_long_enum {
}
pub use self::bitflags_long_enum::LongEnum;

impl LongEnum {
pub const ENUM_VALUES: &'static [Self] = &[
Self::LongOne,
Self::LongTwo,
Self::LongBig,
];
}
impl Serialize for LongEnum {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
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