Encoder: uses more readable single quote strings

src/Neon/Node/StringNode.php

@@ -79,18 +79,27 @@ function (array $m): string {
 
 	public function toString(): string
 	{
-		$res = json_encode($this->value, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
-		if ($res === false) {
-			throw new Nette\Neon\Exception('Invalid UTF-8 sequence: ' . $this->value);
-		}
+		if (strpos($this->value, "\n") === false) {
+			return "'" . str_replace("'", "''", $this->value) . "'";
+
+		} elseif (preg_match('~\n[\t ]+\'{3}~', $this->value)) {
+			$s = json_encode($this->value, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+			$s = preg_replace_callback(
+				'#[^\\\\]|\\\\(.)#s',
+				function ($m) {
+					return ['n' => "\n", 't' => "\t", '"' => '"'][$m[1] ?? ''] ?? $m[0];
+				},
+				substr($s, 1, -1)
+			);
+			$s = str_replace('"""', '""\"', $s);
+			$delim = '"""';
 
-		if (strpos($this->value, "\n") !== false) {
-			$res = preg_replace_callback('#[^\\\\]|\\\\(.)#s', function ($m) {
-				return ['n' => "\n\t", 't' => "\t", '"' => '"'][$m[1] ?? ''] ?? $m[0];
-			}, $res);
-			$res = '"""' . "\n\t" . substr($res, 1, -1) . "\n" . '"""';
+		} else {
+			$s = $this->value;
+			$delim = "'''";
 		}
 
-		return $res;
+		$s = preg_replace('#^(?=.)#m', "\t", $s);
+		return $delim . "\n" . $s . "\n" . $delim;
 	}
 }

tests/Neon/Encoder.phpt

@@ -15,7 +15,7 @@ require __DIR__ . '/../bootstrap.php';
 
 
 Assert::same(
-	'[true, "TRUE", "tRuE", "true", false, "FALSE", "fAlSe", "false", null, "NULL", "nUlL", "null", "yes", "no", "on", "off"]',
+	"[true, 'TRUE', 'tRuE', 'true', false, 'FALSE', 'fAlSe', 'false', null, 'NULL', 'nUlL', 'null', 'yes', 'no', 'on', 'off']",
 	Neon::encode([
 		true, 'TRUE', 'tRuE', 'true',
 		false, 'FALSE', 'fAlSe', 'false',
@@ -25,27 +25,47 @@ Assert::same(
 );
 
 Assert::same(
-	'[1, 1.0, 0, 0.0, -1, -1.2, "1", "1.0", "-1"]',
+	"[1, 1.0, 0, 0.0, -1, -1.2, '1', '1.0', '-1']",
 	Neon::encode([1, 1.0, 0, 0.0, -1, -1.2, '1', '1.0', '-1'])
 );
 
 Assert::same(
-	'["1", "0xAA", "0o12", "0b110", "+1", "-1", ".50", "1e10"]',
+	"['1', '0xAA', '0o12', '0b110', '+1', '-1', '.50', '1e10']",
 	Neon::encode(['1', '0xAA', '0o12', '0b110', '+1', '-1', '.50', '1e10'])
 );
 
 Assert::same(
-	'[\, "\'", "\"", "\r", "\\\\ \r"]',
-	Neon::encode(['\\', "'", '"', "\r", "\\ \r"])
+	"[\\, '''', '\"', '''\n\n\n''', '''\n\t\\ \n\n''']",
+	Neon::encode(['\\', "'", '"', "\n", "\\ \n"])
 );
 
 Assert::same(
-	"{multi: [\"\"\"\n\tone\n\ttwo\n\tthree\\\\ne \"'\t\n\"\"\"]}",
+	"'''\n\taaa\n\t'''bbb\n'''",
+	Neon::encode("aaa\n'''bbb")
+);
+
+Assert::same(
+	"\"\"\"\n\taaa\n\t \t'''bbb\n\"\"\"",
+	Neon::encode("aaa\n \t'''bbb")
+);
+
+Assert::same(
+	"'''\n\taaa'''\n\tbbb\n'''",
+	Neon::encode("aaa'''\nbbb")
+);
+
+Assert::same(
+	"\"\"\"\n\taaa\n\t \t'''bbb\n\t \t\"\"\\\"ccc\n\"\"\"",
+	Neon::encode("aaa\n \t'''bbb\n \t\"\"\"ccc")
+);
+
+Assert::same(
+	"{multi: ['''\n\tone\n\ttwo\n\tthree\\ne \"'\t\n''']}",
 	Neon::encode(['multi' => ["one\ntwo\nthree\\ne \"'\t"]])
 );
 
 Assert::same(
-	'["[", "]", "{", "}", ":", ": ", "=", "#"]',
+	"['[', ']', '{', '}', ':', ': ', '=', '#']",
 	Neon::encode(['[', ']', '{', '}', ':', ': ', '=', '#'])
 );
 
@@ -92,7 +112,7 @@ Assert::same(
 );
 
 Assert::same(
-	'",žlu/ťoučký"',
+	"',žlu/ťoučký'",
 	Neon::encode(',žlu/ťoučký')
 );
 
@@ -144,7 +164,3 @@ Assert::same(
 	'[]',
 	Neon::encode([], Neon::BLOCK)
 );
-
-Assert::exception(function () {
-	Neon::encode("a invalid utf8 char sequence: \xc2\x82\x28\xfc\xa1\xa1\xa1\xa1\xa1\xe2\x80\x82");
-}, Nette\Neon\Exception::class);

tests/Neon/fixtures/Parser.nodes.neon

@@ -24,7 +24,7 @@ dash subblock:
 - a
 - b
 
-text: """
+text: '''
 	one
 	two
-"""
+'''