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Copy pathParser.php
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794 lines (675 loc) · 24.2 KB
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<?php
namespace Phpactor\DocblockParser;
use Phpactor\DocblockParser\Ast\ArrayKeyValueList;
use Phpactor\DocblockParser\Ast\ArrayKeyValueNode;
use Phpactor\DocblockParser\Ast\ConditionalNode;
use Phpactor\DocblockParser\Ast\Tag\AssertTag;
use Phpactor\DocblockParser\Ast\Tag\DeprecatedTag;
use Phpactor\DocblockParser\Ast\Docblock;
use Phpactor\DocblockParser\Ast\Tag\ExtendsTag;
use Phpactor\DocblockParser\Ast\Tag\ImplementsTag;
use Phpactor\DocblockParser\Ast\Tag\MethodTag;
use Phpactor\DocblockParser\Ast\Tag\MixinTag;
use Phpactor\DocblockParser\Ast\ParameterList;
use Phpactor\DocblockParser\Ast\Tag\ParameterTag;
use Phpactor\DocblockParser\Ast\Tag\PropertyTag;
use Phpactor\DocblockParser\Ast\Tag\ReturnTag;
use Phpactor\DocblockParser\Ast\Tag\TemplateTag;
use Phpactor\DocblockParser\Ast\Tag\TypeAliasTag;
use Phpactor\DocblockParser\Ast\TextNode;
use Phpactor\DocblockParser\Ast\TypeList;
use Phpactor\DocblockParser\Ast\Type\ArrayNode;
use Phpactor\DocblockParser\Ast\Type\ArrayShapeNode;
use Phpactor\DocblockParser\Ast\Type\CallableNode;
use Phpactor\DocblockParser\Ast\Type\ClassNode;
use Phpactor\DocblockParser\Ast\Node;
use Phpactor\DocblockParser\Ast\Tag\ParamTag;
use Phpactor\DocblockParser\Ast\TagNode;
use Phpactor\DocblockParser\Ast\TypeNode;
use Phpactor\DocblockParser\Ast\Type\ConstantNode;
use Phpactor\DocblockParser\Ast\Type\GenericNode;
use Phpactor\DocblockParser\Ast\Type\IntersectionNode;
use Phpactor\DocblockParser\Ast\Type\ListBracketsNode;
use Phpactor\DocblockParser\Ast\Type\ListNode;
use Phpactor\DocblockParser\Ast\Type\LiteralFloatNode;
use Phpactor\DocblockParser\Ast\Type\LiteralIntegerNode;
use Phpactor\DocblockParser\Ast\Type\LiteralStringNode;
use Phpactor\DocblockParser\Ast\Type\NullNode;
use Phpactor\DocblockParser\Ast\Type\NullableNode;
use Phpactor\DocblockParser\Ast\Type\ParenthesizedType;
use Phpactor\DocblockParser\Ast\Type\ScalarNode;
use Phpactor\DocblockParser\Ast\Type\ThisNode;
use Phpactor\DocblockParser\Ast\Type\UnionNode;
use Phpactor\DocblockParser\Ast\Type\UnsupportedNode;
use Phpactor\DocblockParser\Ast\UnknownTag;
use Phpactor\DocblockParser\Ast\ValueNode;
use Phpactor\DocblockParser\Ast\Value\NullValue;
use Phpactor\DocblockParser\Ast\Tag\VarTag;
use Phpactor\DocblockParser\Ast\Tag\ThrowsTag;
use Phpactor\DocblockParser\Ast\VariableNode;
use Phpactor\DocblockParser\Ast\Token;
use Phpactor\DocblockParser\Ast\Tokens;
use RuntimeException;
final class Parser
{
/**
* TODO Callable is not a scalar.
*/
private const SCALAR_TYPES = [
'int', 'float', 'bool', 'class-string', 'string', 'mixed', 'callable', 'false'
];
private Tokens $tokens;
public function parse(Tokens $tokens): Node
{
$children = [];
$this->tokens = $tokens;
while ($tokens->hasCurrent()) {
/** @phpstan-ignore-next-line Above ensures it is not null */
if ($tokens->current->type === Token::T_TAG) {
$children[] = $this->parseTag();
continue;
}
$children[] = $tokens->chomp();
}
if (count($children) === 1) {
$node = reset($children);
if ($node instanceof Node) {
return $node;
}
}
/** @phpstan-ignore-next-line */
return new Docblock($children);
}
private function parseTag(): TagNode
{
$token = $this->tokens->mustGetCurrent();
$value = str_replace(['@psalm-', '@phpstan-'], '@', $token->value);
return match ($value) {
'@param' => $this->parseParam(),
'@var' => $this->parseVar(),
'@throws' => $this->parseThrows(),
'@deprecated' => $this->parseDeprecated(),
'@method' => $this->parseMethod(),
'@assert' => $this->parseAssert(),
'@type' => $this->parseTypeAlias(),
'@property', '@property-read' => $this->parseProperty(),
'@mixin' => $this->parseMixin(),
'@return' => $this->parseReturn(),
'@template' => $this->parseTemplate(),
'@template-covariant' => $this->parseTemplate(),
'@extends', '@template-extends' => $this->parseExtends(),
'@implements', '@template-implements' => $this->parseImplements(),
default => new UnknownTag($this->tokens->mustChomp()),
};
}
private function parseParam(): ParamTag
{
$type = $variable = $textNode = null;
$tag = $this->tokens->mustChomp(Token::T_TAG);
if ($this->ifType()) {
$type = $this->parseTypes();
}
if ($this->tokens->ifNextIs(Token::T_VARIABLE)) {
$variable = $this->parseVariable();
}
return new ParamTag($tag, $type, $variable, $this->parseText() ?: new TextNode([]));
}
private function parseVar(): VarTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = $variable = null;
if ($this->ifType()) {
$type = $this->parseTypes();
}
if ($this->tokens->ifNextIs(Token::T_VARIABLE)) {
$variable = $this->parseVariable();
}
return new VarTag($tag, $type, $variable);
}
private function parseThrows(): ThrowsTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = null;
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseTypes();
$this->tokens->chompWhitespace();
}
$text = $this->parseText();
return new ThrowsTag($tag, $type, $text);
}
private function parseMethod(): MethodTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = $name = $parameterList = $open = $close = null;
$static = null;
if ($this->tokens->ifNextIs(Token::T_LABEL)) {
if ($this->tokens->mustGetCurrent()->value === 'static') {
$static = $this->tokens->chomp();
}
}
if ($this->ifType() || $this->tokens->if(Token::T_VARIABLE)) {
$type = $this->parseTypes();
}
if ($this->tokens->if(Token::T_LABEL)) {
$name = $this->tokens->chomp();
}
if ($this->tokens->if(Token::T_PAREN_OPEN)) {
$open = $this->tokens->chomp(Token::T_PAREN_OPEN);
$parameterList = $this->parseParameterList();
$close = $this->tokens->chompIf(Token::T_PAREN_CLOSE);
}
return new MethodTag($tag, $type, $name, $static, $open, $parameterList, $close, $this->parseText());
}
private function parseProperty(): PropertyTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = $name = null;
if ($this->ifType()) {
$type = $this->parseTypes();
}
if ($this->tokens->ifNextIs(Token::T_VARIABLE)) {
$name = $this->tokens->chomp();
}
return new PropertyTag($tag, $type, $name);
}
private function parseTypes(): ?TypeNode
{
$type = $this->parseType();
if (null === $type) {
return $type;
}
$elements = [$type];
$mode = null;
while (true) {
if (
$this->tokens->if(Token::T_BAR) ||
$this->tokens->if(Token::T_AMPERSAND)
) {
$delimiter = $this->tokens->mustChomp();
if (!$mode) {
$mode = $delimiter->type;
}
if ($mode !== $delimiter->type) {
continue;
}
$elements[] = $delimiter;
$type = $this->parseType();
if (null !== $type) {
$elements[] = $type;
continue;
}
}
break;
}
$list = new TypeList($elements);
if (count($list->list) === 1) {
return $list->types()->first();
}
if ($mode && $mode === Token::T_AMPERSAND) {
return new IntersectionNode($list);
}
return new UnionNode($list);
}
private function parseType(): ?TypeNode
{
if (null === $this->tokens->current) {
return null;
}
if ($this->tokens->current->type === Token::T_VARIABLE) {
if ($this->tokens->current->value === '$this') {
$variable = $this->tokens->mustChomp(Token::T_VARIABLE);
return new ThisNode($variable);
}
return $this->parseConditionalType();
}
if ($this->tokens->current->type === Token::T_NULLABLE) {
$nullable = $this->tokens->mustChomp();
$type = $this->parseType();
if ($type === null) {
return null;
}
return new NullableNode($nullable, $type);
}
if ($this->tokens->current->type === Token::T_PAREN_OPEN) {
$open = $this->tokens->mustChomp();
$this->tokens->chompWhitespace();
$type = $this->parseTypes();
$this->tokens->chompWhitespace();
$close = $this->tokens->chompIf(Token::T_PAREN_CLOSE);
return new ParenthesizedType($open, $type, $close);
}
$type = $this->tokens->mustChomp();
/** @phpstan-ignore-next-line It can be null*/
if (null === $this->tokens->current && $type) {
return $this->createTypeFromToken($type);
}
$isList = false;
if ($this->tokens->current->type === Token::T_PAREN_OPEN) {
$open = $this->tokens->chomp();
$typeList = null;
if ($this->tokens->if(Token::T_LABEL)) {
$typeList = $this->parseTypeList();
}
$close = $this->tokens->chomp();
$returnType = null;
$colon = null;
if ($this->tokens->if(Token::T_COLON)) {
$colon = $this->tokens->chomp();
if ($this->tokens->if(Token::T_LABEL)) {
$returnType = $this->parseTypes();
}
}
return new CallableNode(
$type,
$open,
$typeList,
$close,
$colon,
$returnType,
);
}
if ($this->tokens->current->type === Token::T_BRACKET_ANGLE_OPEN) {
$open = $this->tokens->mustChomp();
$typeList = null;
$variance = null;
if ($this->tokens->if(Token::T_VARIABLE)) {
$typeList = $this->parseTypeList();
}
if ($this->tokens->if(Token::T_QUOTED_STRING)) {
$typeList = $this->parseTypeList();
}
if ($this->tokens->if(Token::T_LABEL)) {
$typeList = $this->parseTypeList();
}
if ($this->tokens->if(Token::T_INTEGER)) {
$typeList = $this->parseTypeList();
}
if ($this->tokens->if(Token::T_NULLABLE)) {
$typeList = $this->parseTypeList();
}
if (!$this->tokens->if(Token::T_BRACKET_ANGLE_CLOSE)) {
return null;
}
if (!$typeList) {
return null;
}
$type = new GenericNode(
$open,
$this->createTypeFromToken($type),
$typeList,
$this->tokens->mustChomp()
);
return $this->parseDimensions($type);
}
if ($this->tokens->current->type === Token::T_BRACKET_CURLY_OPEN) {
$open = $this->tokens->chomp();
assert(!is_null($open));
$keyValues = [];
$close = null;
if ($this->tokens->ifOneOf(Token::T_LABEL, Token::T_INTEGER)) {
$keyValues = $this->parseArrayKeyValues();
}
if ($this->tokens->if(Token::T_BRACKET_CURLY_CLOSE)) {
$close = $this->tokens->chomp();
}
$type = new ArrayShapeNode($open, new ArrayKeyValueList(
$keyValues,
), $close);
return $this->parseDimensions($type);
}
return $this->parseDimensions($this->createTypeFromToken($type));
}
private function parseDimensions(TypeNode $type): TypeNode
{
while ($this->tokens->if(Token::T_LIST)) {
$list = $this->tokens->mustChomp();
$type = new ListBracketsNode($type, $list);
}
return $type;
}
private function createTypeFromToken(Token $type): TypeNode
{
if (strtolower($type->value) === 'null') {
return new NullNode($type);
}
if (strtolower($type->value) === 'array') {
return new ArrayNode($type);
}
if (strtolower($type->value) === 'list') {
return new ListNode($type);
}
if (in_array($type->value, self::SCALAR_TYPES)) {
return new ScalarNode($type);
}
if ($type->type === Token::T_QUOTED_STRING) {
return new LiteralStringNode($type);
}
if ($type->type === Token::T_FLOAT) {
return new LiteralFloatNode($type);
}
if ($type->type === Token::T_INTEGER) {
return new LiteralIntegerNode($type);
}
if ($type->type !== Token::T_LABEL) {
return new UnsupportedNode($type);
}
$classNode = new ClassNode($type);
if (
$this->tokens->peekIs(0, Token::T_DOUBLE_COLON) &&
($this->tokens->peekIs(1, Token::T_LABEL) || $this->tokens->peekIs(1, Token::T_ASTERISK))
) {
return new ConstantNode(
$classNode,
$this->tokens->mustChomp(),
$this->tokens->mustChomp(),
);
}
return $classNode;
}
private function parseVariable(): ?VariableNode
{
if ($this->tokens->mustGetCurrent()->type !== Token::T_VARIABLE) {
return null;
}
$name = $this->tokens->mustChomp(Token::T_VARIABLE);
return new VariableNode($name);
}
private function parseTypeList(string $delimiter = ','): TypeList
{
$types = [];
while (true) {
if ($this->tokens->if(Token::T_LABEL)) {
if (in_array($this->tokens->mustGetCurrent()->value, [
'covariant',
'contravariant',
'invariant',
'bivariant'
])) {
$types[] = $this->tokens->mustChomp();
$this->tokens->chompWhitespace();
}
$types[] = $this->parseTypes();
} elseif ($this->tokens->if(Token::T_NULLABLE)) {
$types[] = $this->parseTypes();
} elseif ($this->tokens->if(Token::T_QUOTED_STRING)) {
$types[] = $this->parseTypes();
} elseif ($this->tokens->if(Token::T_INTEGER)) {
$types[] = $this->parseTypes();
} elseif ($this->tokens->if(Token::T_VARIABLE)) {
$types[] = $this->parseTypes();
}
if ($this->tokens->if(Token::T_COMMA)) {
$types[] = $this->tokens->mustChomp();
continue;
}
break;
}
return new TypeList($types);
}
private function parseParameterList(): ?ParameterList
{
if ($this->tokens->if(Token::T_PAREN_CLOSE)) {
return null;
}
$parameters = [];
while (true) {
$parameters[] = $this->parseParameter();
if ($this->tokens->if(Token::T_COMMA)) {
$parameters[] = $this->tokens->mustChomp();
continue;
}
break;
}
return new ParameterList($parameters);
}
private function parseParameter(): ParameterTag
{
$type = $name = $default = null;
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseTypes();
}
if ($this->tokens->if(Token::T_VARIABLE)) {
$name = $this->parseVariable();
}
if ($this->tokens->if(Token::T_EQUALS)) {
$equals = $this->tokens->chomp();
$default = $this->parseValue();
}
return new ParameterTag($type, $name, $default);
}
private function parseDeprecated(): DeprecatedTag
{
return new DeprecatedTag(
$this->tokens->mustChomp(Token::T_TAG),
$this->parseText()
);
}
private function parseMixin(): MixinTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = null;
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseTypes();
if (!$type instanceof ClassNode && !$type instanceof GenericNode) {
$type = null;
}
}
return new MixinTag($tag, $type);
}
private function parseReturn(): ReturnTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = null;
if ($this->ifType()) {
$type = $this->parseTypes();
}
if ($this->tokens->if(Token::T_VARIABLE)) {
$variable = $this->tokens->mustChomp(Token::T_VARIABLE);
if ($variable->value === '$this') {
$type = new ThisNode($variable);
}
}
return new ReturnTag($tag, $type, $this->parseText());
}
/**
* Parse text until the next tag
*
* This method assumes that any prose after a tag belongs to the tag.
*/
private function parseText(): ?TextNode
{
if (null === $this->tokens->current) {
return null;
}
$text = [];
while ($this->tokens->current) {
if ($this->tokens->current->type === Token::T_PHPDOC_CLOSE) {
break;
}
if ($this->tokens->current->type === Token::T_TAG) {
break;
}
$text[] = $this->tokens->mustChomp();
}
if ($text) {
return new TextNode($text);
}
return null;
}
private function ifType(): bool
{
return $this->tokens->if(Token::T_LABEL) ||
$this->tokens->if(Token::T_NULLABLE) ||
$this->tokens->if(Token::T_QUOTED_STRING) ||
$this->tokens->if(Token::T_INTEGER) ||
$this->tokens->if(Token::T_FLOAT) ||
$this->tokens->if(Token::T_PAREN_OPEN);
}
private function parseValue(): ?ValueNode
{
if ($this->tokens->if(Token::T_LABEL)) {
if (strtolower($this->tokens->mustGetCurrent()->value) === 'null') {
return new NullValue($this->tokens->mustChomp());
}
}
return null;
}
private function parseTemplate(): TemplateTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$placeholder = null;
$of = null;
$type = null;
if ($this->tokens->if(Token::T_LABEL)) {
$placeholder = $this->tokens->mustChomp();
}
if ($this->tokens->if(Token::T_LABEL)) {
$of = $this->tokens->mustChomp();
if ($of->value === 'of') {
/** @phpstan-ignore-next-line */
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseTypes();
}
} else {
$of = null;
}
}
return new TemplateTag($tag, $placeholder, $of, $type);
}
private function parseExtends(): ExtendsTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$type = null;
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseTypes();
}
return new ExtendsTag($tag, $type);
}
private function parseImplements(): ImplementsTag
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$types = [];
if ($this->tokens->if(Token::T_LABEL)) {
$types = $this->parseTypeList()->list;
}
return new ImplementsTag($tag, $types);
}
/**
* @return array<int,ArrayKeyValueNode|Token>
*/
private function parseArrayKeyValues(): array
{
if ($this->tokens->if(Token::T_BRACKET_CURLY_CLOSE)) {
return [];
}
$list = [];
while (true) {
/** @phpstan-ignore-next-line Condition is not always false */
if ($this->tokens->if(Token::T_BRACKET_CURLY_CLOSE)) {
break;
}
$list[] = $this->parseArrayKeyValue();
if ($this->tokens->if(Token::T_COMMA)) {
$token = $this->tokens->chomp();
if ($token) {
$list[] = $token;
}
continue;
}
break;
}
return $list;
}
private function parseArrayKeyValue(): ArrayKeyValueNode
{
$key = $colon = $type = null;
if (
$this->tokens->ifOneOf(Token::T_LABEL, Token::T_INTEGER) &&
$this->tokens->peekIs(1, Token::T_COLON)
) {
$key = $this->tokens->chomp();
$colon = $this->tokens->chomp();
}
if (
$this->tokens->ifOneOf(Token::T_LABEL, Token::T_INTEGER) &&
$this->tokens->peekIs(1, Token::T_NULLABLE) &&
$this->tokens->peekIs(2, Token::T_COLON)
) {
$key = $this->tokens->chomp();
$_ = $this->tokens->chomp();
$colon = $this->tokens->chomp();
}
$optional = null;
if ($this->tokens->if(Token::T_NULLABLE)) {
$optional = $this->tokens->chomp();
}
$type = null;
if ($this->tokens->ifOneOf(Token::T_LABEL, Token::T_INTEGER, Token::T_QUOTED_STRING)) {
$type = $this->parseTypes();
}
return new ArrayKeyValueNode($optional, $key, $colon, $type);
}
private function parseConditionalType(): TypeNode
{
$variable = $this->parseVariable();
if (!$variable) {
throw new RuntimeException('Expected a variable, this should not happen');
}
if (!$this->tokens->if(Token::T_LABEL)) {
return new ConditionalNode($variable);
}
$is = $this->tokens->mustChomp();
if ($is->toString() !== 'is') {
return new ConditionalNode($variable, $is);
}
$this->tokens->chompWhitespace();
$isType = $this->parseType();
$this->tokens->chompWhitespace();
if (!$question = $this->tokens->chompIf(Token::T_NULLABLE)) {
return new ConditionalNode($variable, $is, $isType);
}
$this->tokens->chompWhitespace();
$left = $this->parseTypes();
$this->tokens->chompWhitespace();
if (!$colon = $this->tokens->chompIf(Token::T_COLON)) {
return new ConditionalNode($variable, $is, $isType);
}
$this->tokens->chompWhitespace();
$right = $this->parseTypes();
return new ConditionalNode($variable, $is, $isType, $question, $left, $colon, $right);
}
private function parseTypeAlias(): TagNode
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$alias = $equals = $type = null;
if ($this->tokens->if(Token::T_LABEL)) {
$alias = $this->parseType();
}
if ($this->tokens->if(Token::T_EQUALS)) {
$equals = $this->tokens->chomp(Token::T_EQUALS);
}
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseTypes();
}
return new TypeAliasTag($tag, $alias, $equals, $type);
}
private function parseAssert(): TagNode
{
$tag = $this->tokens->mustChomp(Token::T_TAG);
$paramName = $type = $negOrEquality = null;
if ($this->tokens->if(Token::T_EQUALS)) {
$negOrEquality = $this->tokens->mustChomp(Token::T_EQUALS);
}
if ($this->tokens->if(Token::T_BANG)) {
$negation = $this->tokens->mustChomp(Token::T_BANG);
$negOrEquality = $negation;
}
if ($this->tokens->if(Token::T_LABEL)) {
$type = $this->parseType();
}
if ($this->tokens->if(Token::T_VARIABLE)) {
$paramName = $this->parseVariable();
}
return new AssertTag($tag, $negOrEquality, $type, $paramName);
}
}
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