Struct ConversionConfig 

pub struct ConversionConfig<'a> {
    pub type_name_prefix: &'a str,
    pub cast_large_ints_to_i64: bool,
    pub enum_string_names: Option<&'a AHashSet<String>>,
    pub map_uses_jsvalue: bool,
    pub cast_f32_to_f64: bool,
    pub optionalize_defaults: bool,
    pub json_to_string: bool,
    pub include_cfg_metadata: bool,
    pub option_duration_on_defaults: bool,
    pub binding_enums_have_data: bool,
}

Backend-specific configuration for From/field conversion generation. Enables shared code to handle all backend differences via parameters.

Fields

type_name_prefix: &'a str

Prefix for binding type names (“Js” for NAPI/WASM, “” for others).

cast_large_ints_to_i64: bool

U64/Usize/Isize need as i64 casts (NAPI, PHP — JS/PHP lack native u64).

enum_string_names: Option<&'a AHashSet<String>>

Enum names mapped to String in the binding layer (PHP only). Named fields referencing these use format!("{:?}") in core→binding.

map_uses_jsvalue: bool

Map types use JsValue in the binding layer (WASM only). When true, Map fields use serde_wasm_bindgen for conversion instead of iterator-based collect patterns (JsValue is not iterable).

cast_f32_to_f64: bool

When true, f32 is mapped to f64 (NAPI only — JS has no f32).

optionalize_defaults: bool

When true, non-optional fields on defaultable types are wrapped in Option in the binding struct and need .unwrap_or_default() in binding→core From. Used by NAPI to make JS-facing structs fully optional.

json_to_string: bool

When true, Json (serde_json::Value) fields are mapped to String in the binding layer. Core→binding uses .to_string(), binding→core uses Default::default() (lossy). Used by PHP where serde_json::Value can’t cross the extension boundary.

include_cfg_metadata: bool

When true, add synthetic metadata field conversion for ConversionResult. Only NAPI backend sets this (it adds metadata field to the struct).

option_duration_on_defaults: bool

When true, non-optional Duration fields on has_default types are stored as Option<u64> in the binding struct. The From conversion uses the builder pattern so that None falls back to the core type’s Default implementation (giving the real default, e.g. Duration::from_secs(30)) instead of Duration::ZERO. Used by PyO3 to prevent validation failures when request_timeout is unset.

binding_enums_have_data: bool

When true, binding enums include data variant fields (Magnus). When false (default), binding enums are unit-only and data is lost in conversion.

Trait Implementations

impl<'a> Clone for ConversionConfig<'a>

fn clone(&self) -> ConversionConfig<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Default for ConversionConfig<'a>

fn default() -> ConversionConfig<'a>

Returns the “default value” for a type.