mago-type-syntax 1.11.0

Provides core utilities useful for building lexers and parsers within Mago.
Documentation 
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use mago_database::file::HasFileId;

use crate::ast::Type;
use crate::error::ParseError;
use crate::lexer::TypeLexer;
use crate::parser::internal::stream::TypeTokenStream;

mod internal;

/// Constructs a type AST from a lexer.
///
/// # Errors
///
/// Returns a [`ParseError`] if the type syntax is invalid.
pub fn construct(lexer: TypeLexer<'_>) -> Result<Type<'_>, ParseError> {
    let mut stream = TypeTokenStream::new(lexer);

    let ty = internal::parse_type(&mut stream)?;

    if let Some(next) = stream.lookahead(0)? {
        return Err(ParseError::UnexpectedToken(vec![], next.kind, next.span_for(stream.file_id())));
    }

    Ok(ty)
}