Struct StagedScanner 

pub struct StagedScanner { /* private fields */ }

Stateful JSON fragment scanner with buffer reuse

The scanner processes complete JSON documents to identify and extract JSON objects and arrays using a high-performance two-stage pipeline. Reuses internal buffers across multiple scans to eliminate allocation overhead.

Example

use json_extractor::StagedScanner;

let mut scanner = StagedScanner::new();
let data = br#"{"name": "Alice"} {"age": 30}"#;
let fragments = scanner.scan_fragments(data);

assert_eq!(fragments.len(), 2);
assert!(fragments[0].is_complete());

Implementations

impl StagedScanner

pub fn new() -> Self

Create a new scanner with empty buffers

Example

use json_extractor::StagedScanner;

let mut scanner = StagedScanner::new();

pub fn scan_fragments(&mut self, data: &[u8]) -> &[Fragment]

Scan a complete JSON document and extract all fragments

This method reuses internal buffers across calls for maximum performance. Buffers are cleared but not deallocated, preserving capacity.

Arguments

• data - Complete JSON document bytes

Returns

Slice of all fragments found in the document (valid until next call)

Example

use json_extractor::StagedScanner;

let mut scanner = StagedScanner::new();
let data = br#"{"name": "Alice"} {"age": 30}"#;
let fragments = scanner.scan_fragments(data);

assert_eq!(fragments.len(), 2);
assert!(fragments[0].is_complete());
assert_eq!(fragments[0].start, 0);

Trait Implementations

impl Default for StagedScanner

fn default() -> Self

Returns the “default value” for a type.