Function parseDoWhile

src/parser/syntaxes/statements.ts:453–474

* ```abnf * Loop = "do" BlockOrStatement "while" Expr * ```

(s: ITokenStream)

 * ```
*/
function parseDoWhile(s: ITokenStream): Ast.Loop {
	const doStartPos = s.getPos();
	s.expect(TokenKind.DoKeyword);
	s.next();
	const body = parseBlockOrStatement(s);
	const whilePos = s.getPos();
	s.expect(TokenKind.WhileKeyword);
	s.next();
	const cond = parseExpr(s, false);
	const endPos = s.getPos();

	return NODE('loop', {
		statements: [
			body,
			NODE('if', {
				cond: NODE('not', { expr: cond }, whilePos, endPos),
				then: NODE('break', {}, endPos, endPos),
				elseif: [],
			}, whilePos, endPos),
		],
	}, doStartPos, endPos);
}

/**
 * ```abnf