Fix parsing of [] in various cases - closes #36

* Array shapes
* Generics
* $this
* Nullables

Author: iluuu1994

Diff for: src/Parser/TypeParser.php

@@ -37,17 +37,22 @@ private function parseAtomic(TokenIterator $tokens): Ast\Type\TypeNode
 			if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_SQUARE_BRACKET)) {
 				$type = $this->tryParseArray($tokens, $type);
 			}
-
 		} elseif ($tokens->tryConsumeTokenType(Lexer::TOKEN_THIS_VARIABLE)) {
-			return new Ast\Type\ThisTypeNode();
+			$type = new Ast\Type\ThisTypeNode();
 
+			if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_SQUARE_BRACKET)) {
+				$type = $this->tryParseArray($tokens, $type);
+			}
 		} else {
 			$type = new Ast\Type\IdentifierTypeNode($tokens->currentTokenValue());
 			$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
 
 			if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_ANGLE_BRACKET)) {
 				$type = $this->parseGeneric($tokens, $type);
 
+				if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_SQUARE_BRACKET)) {
+					$type = $this->tryParseArray($tokens, $type);
+				}
 			} elseif ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_PARENTHESES)) {
 				$type = $this->tryParseCallable($tokens, $type);
 
@@ -56,6 +61,10 @@ private function parseAtomic(TokenIterator $tokens): Ast\Type\TypeNode
 
 			} elseif ($type->name === 'array' && $tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_CURLY_BRACKET) && !$tokens->isPrecededByHorizontalWhitespace()) {
 				$type = $this->parseArrayShape($tokens, $type);
+
+				if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_SQUARE_BRACKET)) {
+					$type = $this->tryParseArray($tokens, $type);
+				}
 			}
 		}
 
@@ -101,6 +110,10 @@ private function parseNullable(TokenIterator $tokens): Ast\Type\TypeNode
 			$type = $this->parseArrayShape($tokens, $type);
 		}
 
+		if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_SQUARE_BRACKET)) {
+			$type = $this->tryParseArray($tokens, $type);
+		}
+
 		return new Ast\Type\NullableTypeNode($type);
 	}
 
@@ -179,6 +192,10 @@ private function parseCallableReturnType(TokenIterator $tokens): Ast\Type\TypeNo
 			}
 		}
 
+		if ($tokens->isCurrentTokenType(Lexer::TOKEN_OPEN_SQUARE_BRACKET)) {
+			$type = $this->tryParseArray($tokens, $type);
+		}
+
 		return $type;
 	}
 
@@ -218,7 +235,7 @@ private function tryParseArray(TokenIterator $tokens, Ast\Type\TypeNode $type):
 	}
 
 
-	private function parseArrayShape(TokenIterator $tokens, Ast\Type\TypeNode $type): Ast\Type\TypeNode
+	private function parseArrayShape(TokenIterator $tokens, Ast\Type\TypeNode $type): Ast\Type\ArrayShapeNode
 	{
 		$tokens->consumeTokenType(Lexer::TOKEN_OPEN_CURLY_BRACKET);
 		$tokens->tryConsumeTokenType(Lexer::TOKEN_PHPDOC_EOL);

Diff for: tests/PHPStan/Parser/TypeParserTest.php

@@ -711,6 +711,93 @@ public function provideParseData(): array
 					new IdentifierTypeNode("\xA009")
 				),
 			],
+			[
+				'Collection<array-key, int>[]',
+				new ArrayTypeNode(
+					new GenericTypeNode(
+						new IdentifierTypeNode('Collection'),
+						[
+							new IdentifierTypeNode('array-key'),
+							new IdentifierTypeNode('int'),
+						]
+					)
+				),
+			],
+			[
+				'int | Collection<array-key, int>[]',
+				new UnionTypeNode([
+					new IdentifierTypeNode('int'),
+					new ArrayTypeNode(
+						new GenericTypeNode(
+							new IdentifierTypeNode('Collection'),
+							[
+								new IdentifierTypeNode('array-key'),
+								new IdentifierTypeNode('int'),
+							]
+						)
+					),
+				]),
+			],
+			[
+				'array{foo: int}[]',
+				new ArrayTypeNode(
+					new ArrayShapeNode([
+						new ArrayShapeItemNode(
+							new IdentifierTypeNode('foo'),
+							false,
+							new IdentifierTypeNode('int')
+						),
+					])
+				),
+			],
+			[
+				'int | array{foo: int}[]',
+				new UnionTypeNode([
+					new IdentifierTypeNode('int'),
+					new ArrayTypeNode(
+						new ArrayShapeNode([
+							new ArrayShapeItemNode(
+								new IdentifierTypeNode('foo'),
+								false,
+								new IdentifierTypeNode('int')
+							),
+						])
+					),
+				]),
+			],
+			[
+				'$this[]',
+				new ArrayTypeNode(
+					new ThisTypeNode()
+				),
+			],
+			[
+				'int | $this[]',
+				new UnionTypeNode([
+					new IdentifierTypeNode('int'),
+					new ArrayTypeNode(
+						new ThisTypeNode()
+					),
+				]),
+			],
+			[
+				'callable(): int[]',
+				new CallableTypeNode(
+					new IdentifierTypeNode('callable'),
+					[],
+					new ArrayTypeNode(
+						new IdentifierTypeNode('int')
+					)
+				),
+			],
+			[
+				'?int[]',
+				new NullableTypeNode(
+					new ArrayTypeNode(
+						new IdentifierTypeNode('int')
+					)
+				),
+			],
 		];
 	}