Struct Config 

pub struct Config {
    pub sort_key: bool,
    pub preserve_nan: bool,
    pub error_on_nan: bool,
    pub preserve_infinite: bool,
    pub error_on_infinite: bool,
}

Global configuration for compression behavior.

This struct defines options that control how JSON values are processed during compression. The library uses a compile-time constant CONFIG with these settings.

Fields

Field	Default	Description
sort_key	false	Sort object keys alphabetically
preserve_nan	false	Encode NaN as N|0 (vs convert to null)
error_on_nan	false	Panic on NaN (only if preserve_nan is false)
preserve_infinite	false	Encode Infinity as N|+/N|- (vs convert to null)
error_on_infinite	false	Panic on Infinity (only if preserve_infinite is false)

Key Sorting

When sort_key is true, object keys are sorted alphabetically before compression. This ensures consistent output regardless of insertion order, which is useful for:

• Deterministic compression output
• Easier diff comparison
• Consistent hashing of compressed data

Special Number Handling (v3.4.0+)

JSON doesn’t support NaN or Infinity. The handling depends on config:

Value	preserve_* = true	preserve_* = false, error_* = true	Both false
NaN	Encoded as N|0	Panic	Becomes null
Infinity	Encoded as N|+	Panic	Becomes null
-Infinity	Encoded as N|-	Panic	Becomes null

Note: error_on_nan and error_on_infinite only take effect when their corresponding preserve_* option is false.

Example

use compress_json_rs::{Config, CONFIG};

// View the default configuration
assert_eq!(CONFIG.sort_key, false);
assert_eq!(CONFIG.preserve_nan, false);
assert_eq!(CONFIG.error_on_nan, false);
assert_eq!(CONFIG.preserve_infinite, false);
assert_eq!(CONFIG.error_on_infinite, false);

Fields

sort_key: bool

Whether to sort object keys alphabetically.

When true, object keys are sorted before compression, ensuring consistent output regardless of key insertion order.

Default: false

preserve_nan: bool

Whether to preserve NaN values with special encoding.

When true, NaN values are encoded as N|0 for cross-platform compatibility with JavaScript/Python implementations. When false, NaN is converted to null (like JSON.stringify).

Default: false

Added in: v3.4.0

error_on_nan: bool

Whether to panic when encountering NaN values.

Only effective when preserve_nan is false. When true, the library will panic if a NaN is encountered. When false, NaN is silently converted to null.

Default: false

preserve_infinite: bool

Whether to preserve infinite values with special encoding.

When true, Infinity and -Infinity are encoded as N|+ and N|- for cross-platform compatibility with JavaScript/Python implementations. When false, infinite values are converted to null (like JSON.stringify).

Default: false

Added in: v3.4.0

error_on_infinite: bool

Whether to panic when encountering infinite values.

Only effective when preserve_infinite is false. When true, the library will panic if Infinity or -Infinity is encountered. When false, infinite values are silently converted to null.

Default: false

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Config

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

Formats the value using the given formatter.

impl PartialEq for Config

fn eq(&self, other: &Config) -> 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 Config

impl Eq for Config

impl StructuralPartialEq for Config