Struct JsonParseOptions 

#[non_exhaustive]
pub struct JsonParseOptions {
    pub ignore_unknown_enum_values: bool,
    pub strict_extension_keys: bool,
}

Available on crate feature json only.

Options controlling protobuf JSON parsing behavior.

Use JsonParseOptions::new plus builder methods to construct:

let opts = JsonParseOptions::new().ignore_unknown_enum_values(true);

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

ignore_unknown_enum_values: bool

When true, unknown enum string values are silently replaced with the default value (0) for singular fields, or skipped for repeated/map fields, instead of producing an error.

strict_extension_keys: bool

When true, "[pkg.ext]" JSON keys that are not in the extension registry produce a parse error instead of being silently dropped.

The default (false, lenient) matches the pre-extension-registry behavior where all unknown keys were dropped by serde’s derive. protobuf-go (protojson/decode.go:175) and protobuf-es (from-json.ts:251) both error on unregistered extension keys unless their respective ignore-unknown flags are set; set true here to match. The error pinpoints the missing registration.

Extendee mismatch (key IS registered but extends a different message) always errors regardless of this flag — that’s a contract violation, not a mere miss.

Implementations

impl JsonParseOptions

pub fn new() -> Self

Create new parse options with all flags at their default (strict) values.

pub fn ignore_unknown_enum_values(self, ignore: bool) -> Self

Set whether unknown enum string values are ignored (replaced with the default) instead of producing a parse error.

pub fn strict_extension_keys(self, strict: bool) -> Self

Set whether unregistered "[pkg.ext]" JSON keys produce a parse error (true) or are silently dropped (false, the default).

Trait Implementations

impl Clone for JsonParseOptions

fn clone(&self) -> JsonParseOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JsonParseOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for JsonParseOptions

fn default() -> JsonParseOptions

Returns the “default value” for a type.

impl PartialEq for JsonParseOptions

fn eq(&self, other: &JsonParseOptions) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for JsonParseOptions

impl Eq for JsonParseOptions

impl StructuralPartialEq for JsonParseOptions