Struct FlowParser 

pub struct FlowParser { /* private fields */ }

A reusable Flow parser instance backed by QuickJS.

Create once, parse many times. The QuickJS context is reused across calls.

Implementations

impl FlowParser

pub fn new() -> Result<Self, Error>

Create a new parser instance.

Loads the Flow parser JS into a QuickJS context.

pub fn parse_json(&self, source: &str) -> Result<String, Error>

Parse Flow source and return the raw JSON AST.

pub fn parse(&self, source: &str) -> Result<Program, Error>

Parse Flow source and return the typed AST.

pub fn validate(&self, source: &str) -> Result<(), Error>

Validate that source is syntactically valid Flow.

Returns Ok(()) if the source parses without errors, Err otherwise.

pub fn diagnostics(&self, source: &str) -> Result<Vec<ParseError>, Error>

Parse source and return all diagnostics (parse errors with location).

Returns Ok(vec![]) for valid source. Returns Ok(errors) when the source has parse errors — each error carries a message and source location. Returns Err only on runtime or deserialization failure.

pub fn validate_declaration(&self, decl: &str) -> Result<Program, Error>

Validate a Flow type declaration by wrapping it in a // @flow file.

Accepts a bare declaration like type Foo = string; and wraps it as:

// @flow
export type Foo = string;

Declarations starting with declare export are wrapped without adding export (they already include it).