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use crate::source::Decoder;
/// Configuration of the parser
#[derive(Debug)]
#[repr(C)]
pub struct ParserOptions {
/// Name of the buffer. Used in all diagnostic messages
pub buffer_name: String,
/// Custom decoder that can be used if the source is encoded
/// in unknown encoding. Only UTF-8 and ASCII-8BIT/BINARY are
/// supported out of the box.
///
/// # Example
/// ```rust
/// use lib_ruby_parser::source::{Decoder, DecoderResult, InputError};
/// use lib_ruby_parser::{Parser, ParserOptions, ParserResult, LocExt};
///
/// fn decode(encoding: String, input: Vec<u8>) -> DecoderResult {
/// if "US-ASCII" == encoding.to_uppercase() {
/// // reencode and return Ok(result)
/// return DecoderResult::Ok(b"# encoding: us-ascii\ndecoded".to_vec().into());
/// }
/// DecoderResult::Err(InputError::DecodingError(
/// "only us-ascii is supported".into(),
/// ))
/// }
///
/// let decoder = Decoder::new(Box::new(decode));
/// let options = ParserOptions {
/// decoder: Some(decoder),
/// ..Default::default()
/// };
/// let parser = Parser::new(b"# encoding: us-ascii\n3 + 3".to_vec(), options);
/// let ParserResult { ast, input, .. } = parser.do_parse();
///
/// assert_eq!(
/// ast.unwrap().expression().source(&input).unwrap(),
/// "decoded".to_string()
/// )
/// ```
pub decoder: Option<Decoder>,
/// When set to true Parser records tokens.
/// When set to false `ParserResult.tokens` is guaranteed to be empty.
/// If you don't need tokens better set it to false to speed up parsing.
pub record_tokens: bool,
}
const DEFAULT_BUFFER_NAME: &str = "(eval)";
impl Default for ParserOptions {
fn default() -> Self {
Self {
buffer_name: DEFAULT_BUFFER_NAME.to_string(),
decoder: None,
record_tokens: true,
}
}
}