added Position to Exception

Author: dg

src/Neon/Exception.php

@@ -15,4 +15,13 @@
  */
 class Exception extends \Exception
 {
+	public ?Position /*readonly*/ $position = null;
+
+
+	public function __construct(string $message, ?Position $position = null, ?\Throwable $previous = null)
+	{
+		$message .= $position ? ' ' . $position : '';
+		$this->position = $position;
+		parent::__construct($message, 0, $previous);
+	}
 }

src/Neon/Lexer.php

@@ -70,7 +70,7 @@ public function tokenize(string $input): TokenStream
 		$stream = new TokenStream($tokens);
 		if ($position->offset !== strlen($input)) {
 			$s = str_replace("\n", '\n', substr($input, $position->offset, 40));
-			$stream->error("Unexpected '$s'", count($tokens) - 1);
+			throw new Exception("Unexpected '$s'", $position);
 		}
 
 		return $stream;

src/Neon/Node/StringNode.php

@@ -33,7 +33,7 @@ public function toValue(): string
 	}
 
 
-	public static function parse(string $s): string
+	public static function parse(string $s, Nette\Neon\Position $position): string
 	{
 		if (preg_match('#^...\n++([\t ]*+)#', $s, $m)) { // multiline
 			$res = substr($s, 3, -3);
@@ -52,14 +52,14 @@ public static function parse(string $s): string
 
 		return preg_replace_callback(
 			'#\\\(?:ud[89ab][0-9a-f]{2}\\\ud[c-f][0-9a-f]{2}|u[0-9a-f]{4}|.)#i',
-			function (array $m): string {
+			function (array $m) use ($position): string {
 				$sq = $m[0];
 				if (isset(self::EscapeSequences[$sq[1]])) {
 					return self::EscapeSequences[$sq[1]];
 				} elseif ($sq[1] === 'u' && strlen($sq) >= 6) {
-					return json_decode('"' . $sq . '"') ?? throw new Nette\Neon\Exception("Invalid UTF-8 sequence $sq");
+					return json_decode('"' . $sq . '"') ?? throw new Nette\Neon\Exception("Invalid UTF-8 sequence $sq", $position);
 				} else {
-					throw new Nette\Neon\Exception("Invalid escaping sequence $sq");
+					throw new Nette\Neon\Exception("Invalid escaping sequence $sq", $position);
 				}
 			},
 			$res,

src/Neon/Parser.php

@@ -131,12 +131,9 @@ private function parseBlock(string $indent, bool $onlyBullets = false): Node
 	private function parseValue(): Node
 	{
 		if ($token = $this->stream->tryConsume(Token::String)) {
-			try {
-				$node = new Node\StringNode(Node\StringNode::parse($token->text));
-				$this->injectPos($node, $this->stream->getIndex() - 1);
-			} catch (Exception $e) {
-				$this->stream->error($e->getMessage(), $this->stream->getIndex() - 1);
-			}
+			$node = new Node\StringNode(Node\StringNode::parse($token->text, $token->position));
+			$this->injectPos($node, $this->stream->getIndex() - 1);
+
 		} elseif ($token = $this->stream->tryConsume(Token::Literal)) {
 			$pos = $this->stream->getIndex() - 1;
 			$node = new Node\LiteralNode(Node\LiteralNode::parse($token->text, $this->stream->is(':', '=')));

src/Neon/TokenStream.php

@@ -78,6 +78,6 @@ public function error(?string $message = null, ?int $pos = null): void
 		$message ??= 'Unexpected ' . ($token->type === Token::End
 			? 'end'
 			: "'" . str_replace("\n", '<new line>', substr($token->text, 0, 40)) . "'");
-		throw new Exception("$message $token->position");
+		throw new Exception($message, $token->position);
 	}
 }