Function parseAttr

src/parser/syntaxes/statements.ts:409–431

* ```abnf * Attr = "#[" IDENT [StaticExpr] "]" * ```

(s: ITokenStream)

 * ```
*/
function parseAttr(s: ITokenStream): Ast.Attribute {
	const startPos = s.getPos();

	s.expect(TokenKind.OpenSharpBracket);
	s.next();

	s.expect(TokenKind.Identifier);
	const name = s.getTokenValue();
	s.next();

	let value: Ast.Expression;
	if (!s.is(TokenKind.CloseBracket)) {
		value = parseExpr(s, true);
	} else {
		const closePos = s.getPos();
		value = NODE('bool', { value: true }, closePos, closePos);
	}

	s.expect(TokenKind.CloseBracket);
	s.next();

	return NODE('attr', { name, value }, startPos, s.getPos());
}

/**
 * ```abnf