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virtualx-engine/modules/gdscript/gdscript_parser.h
Rémi Verschelde 745f8e112f
Revert "Add UID support to GDScript files" 
This reverts commit c7f68a27ec.

We still think GDScript files need UIDs to allow safe refactoring,
but we're still debating what form those should take exactly.

So far there seems to be agreement that it shouldn't be done via an
annotation as implemented here, so we're reverting this one for now,
to revisit the feature in a future PR.
2024-01-29 21:00:26 +01:00

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/**************************************************************************/
/* gdscript_parser.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef GDSCRIPT_PARSER_H
#define GDSCRIPT_PARSER_H
#include "gdscript_cache.h"
#include "gdscript_tokenizer.h"
#ifdef DEBUG_ENABLED
#include "gdscript_warning.h"
#endif
#include "core/io/resource.h"
#include "core/object/ref_counted.h"
#include "core/object/script_language.h"
#include "core/string/string_name.h"
#include "core/string/ustring.h"
#include "core/templates/hash_map.h"
#include "core/templates/list.h"
#include "core/templates/rb_map.h"
#include "core/templates/vector.h"
#include "core/variant/variant.h"
#ifdef DEBUG_ENABLED
#include "core/string/string_builder.h"
#endif
class GDScriptParser {
struct AnnotationInfo;
public:
// Forward-declare all parser nodes, to avoid ordering issues.
struct AnnotationNode;
struct ArrayNode;
struct AssertNode;
struct AssignableNode;
struct AssignmentNode;
struct AwaitNode;
struct BinaryOpNode;
struct BreakNode;
struct BreakpointNode;
struct CallNode;
struct CastNode;
struct ClassNode;
struct ConstantNode;
struct ContinueNode;
struct DictionaryNode;
struct EnumNode;
struct ExpressionNode;
struct ForNode;
struct FunctionNode;
struct GetNodeNode;
struct IdentifierNode;
struct IfNode;
struct LambdaNode;
struct LiteralNode;
struct MatchNode;
struct MatchBranchNode;
struct ParameterNode;
struct PassNode;
struct PatternNode;
struct PreloadNode;
struct ReturnNode;
struct SelfNode;
struct SignalNode;
struct SubscriptNode;
struct SuiteNode;
struct TernaryOpNode;
struct TypeNode;
struct TypeTestNode;
struct UnaryOpNode;
struct VariableNode;
struct WhileNode;
class DataType {
public:
Vector<DataType> container_element_types;
enum Kind {
BUILTIN,
NATIVE,
SCRIPT,
CLASS, // GDScript.
ENUM, // Enumeration.
VARIANT, // Can be any type.
RESOLVING, // Currently resolving.
UNRESOLVED,
};
Kind kind = UNRESOLVED;
enum TypeSource {
UNDETECTED, // Can be any type.
INFERRED, // Has inferred type, but still dynamic.
ANNOTATED_EXPLICIT, // Has a specific type annotated.
ANNOTATED_INFERRED, // Has a static type but comes from the assigned value.
};
TypeSource type_source = UNDETECTED;
bool is_constant = false;
bool is_read_only = false;
bool is_meta_type = false;
bool is_pseudo_type = false; // For global names that can't be used standalone.
bool is_coroutine = false; // For function calls.
Variant::Type builtin_type = Variant::NIL;
StringName native_type;
StringName enum_type; // Enum name or the value name in an enum.
Ref<Script> script_type;
String script_path;
ClassNode *class_type = nullptr;
MethodInfo method_info; // For callable/signals.
HashMap<StringName, int64_t> enum_values; // For enums.
_FORCE_INLINE_ bool is_set() const { return kind != RESOLVING && kind != UNRESOLVED; }
_FORCE_INLINE_ bool is_resolving() const { return kind == RESOLVING; }
_FORCE_INLINE_ bool has_no_type() const { return type_source == UNDETECTED; }
_FORCE_INLINE_ bool is_variant() const { return kind == VARIANT || kind == RESOLVING || kind == UNRESOLVED; }
_FORCE_INLINE_ bool is_hard_type() const { return type_source > INFERRED; }
String to_string() const;
_FORCE_INLINE_ String to_string_strict() const { return is_hard_type() ? to_string() : "Variant"; }
PropertyInfo to_property_info(const String &p_name) const;
_FORCE_INLINE_ static DataType get_variant_type() { // Default DataType for container elements.
DataType datatype;
datatype.kind = VARIANT;
datatype.type_source = INFERRED;
return datatype;
}
_FORCE_INLINE_ void set_container_element_type(int p_index, const DataType &p_type) {
ERR_FAIL_COND(p_index < 0);
while (p_index >= container_element_types.size()) {
container_element_types.push_back(get_variant_type());
}
container_element_types.write[p_index] = DataType(p_type);
}
_FORCE_INLINE_ DataType get_container_element_type(int p_index) const {
ERR_FAIL_INDEX_V(p_index, container_element_types.size(), get_variant_type());
return container_element_types[p_index];
}
_FORCE_INLINE_ DataType get_container_element_type_or_variant(int p_index) const {
if (p_index < 0 || p_index >= container_element_types.size()) {
return get_variant_type();
}
return container_element_types[p_index];
}
_FORCE_INLINE_ bool has_container_element_type(int p_index) const {
return p_index >= 0 && p_index < container_element_types.size();
}
_FORCE_INLINE_ bool has_container_element_types() const {
return !container_element_types.is_empty();
}
bool is_typed_container_type() const;
GDScriptParser::DataType get_typed_container_type() const;
bool operator==(const DataType &p_other) const {
if (type_source == UNDETECTED || p_other.type_source == UNDETECTED) {
return true; // Can be considered equal for parsing purposes.
}
if (type_source == INFERRED || p_other.type_source == INFERRED) {
return true; // Can be considered equal for parsing purposes.
}
if (kind != p_other.kind) {
return false;
}
switch (kind) {
case VARIANT:
return true; // All variants are the same.
case BUILTIN:
return builtin_type == p_other.builtin_type;
case NATIVE:
case ENUM: // Enums use native_type to identify the enum and its base class.
return native_type == p_other.native_type;
case SCRIPT:
return script_type == p_other.script_type;
case CLASS:
return class_type == p_other.class_type || class_type->fqcn == p_other.class_type->fqcn;
case RESOLVING:
case UNRESOLVED:
break;
}
return false;
}
bool operator!=(const DataType &p_other) const {
return !(*this == p_other);
}
void operator=(const DataType &p_other) {
kind = p_other.kind;
type_source = p_other.type_source;
is_read_only = p_other.is_read_only;
is_constant = p_other.is_constant;
is_meta_type = p_other.is_meta_type;
is_pseudo_type = p_other.is_pseudo_type;
is_coroutine = p_other.is_coroutine;
builtin_type = p_other.builtin_type;
native_type = p_other.native_type;
enum_type = p_other.enum_type;
script_type = p_other.script_type;
script_path = p_other.script_path;
class_type = p_other.class_type;
method_info = p_other.method_info;
enum_values = p_other.enum_values;
container_element_types = p_other.container_element_types;
}
DataType() = default;
DataType(const DataType &p_other) {
*this = p_other;
}
~DataType() {}
};
struct ParserError {
// TODO: Do I really need a "type"?
// enum Type {
// NO_ERROR,
// EMPTY_FILE,
// CLASS_NAME_USED_TWICE,
// EXTENDS_USED_TWICE,
// EXPECTED_END_STATEMENT,
// };
// Type type = NO_ERROR;
String message;
int line = 0, column = 0;
};
#ifdef TOOLS_ENABLED
struct ClassDocData {
String brief;
String description;
Vector<Pair<String, String>> tutorials;
bool is_deprecated = false;
bool is_experimental = false;
};
struct MemberDocData {
String description;
bool is_deprecated = false;
bool is_experimental = false;
};
#endif // TOOLS_ENABLED
struct Node {
enum Type {
NONE,
ANNOTATION,
ARRAY,
ASSERT,
ASSIGNMENT,
AWAIT,
BINARY_OPERATOR,
BREAK,
BREAKPOINT,
CALL,
CAST,
CLASS,
CONSTANT,
CONTINUE,
DICTIONARY,
ENUM,
FOR,
FUNCTION,
GET_NODE,
IDENTIFIER,
IF,
LAMBDA,
LITERAL,
MATCH,
MATCH_BRANCH,
PARAMETER,
PASS,
PATTERN,
PRELOAD,
RETURN,
SELF,
SIGNAL,
SUBSCRIPT,
SUITE,
TERNARY_OPERATOR,
TYPE,
TYPE_TEST,
UNARY_OPERATOR,
VARIABLE,
WHILE,
};
Type type = NONE;
int start_line = 0, end_line = 0;
int start_column = 0, end_column = 0;
int leftmost_column = 0, rightmost_column = 0;
Node *next = nullptr;
List<AnnotationNode *> annotations;
#ifdef DEBUG_ENABLED
Vector<GDScriptWarning::Code> ignored_warnings;
#endif
DataType datatype;
virtual DataType get_datatype() const { return datatype; }
virtual void set_datatype(const DataType &p_datatype) { datatype = p_datatype; }
virtual bool is_expression() const { return false; }
virtual ~Node() {}
};
struct ExpressionNode : public Node {
// Base type for all expression kinds.
bool reduced = false;
bool is_constant = false;
Variant reduced_value;
virtual bool is_expression() const override { return true; }
virtual ~ExpressionNode() {}
protected:
ExpressionNode() {}
};
struct AnnotationNode : public Node {
StringName name;
Vector<ExpressionNode *> arguments;
Vector<Variant> resolved_arguments;
AnnotationInfo *info = nullptr;
PropertyInfo export_info;
bool is_resolved = false;
bool is_applied = false;
bool apply(GDScriptParser *p_this, Node *p_target, ClassNode *p_class);
bool applies_to(uint32_t p_target_kinds) const;
AnnotationNode() {
type = ANNOTATION;
}
};
struct ArrayNode : public ExpressionNode {
Vector<ExpressionNode *> elements;
ArrayNode() {
type = ARRAY;
}
};
struct AssertNode : public Node {
ExpressionNode *condition = nullptr;
ExpressionNode *message = nullptr;
AssertNode() {
type = ASSERT;
}
};
struct AssignableNode : public Node {
IdentifierNode *identifier = nullptr;
ExpressionNode *initializer = nullptr;
TypeNode *datatype_specifier = nullptr;
bool infer_datatype = false;
bool use_conversion_assign = false;
int usages = 0;
virtual ~AssignableNode() {}
protected:
AssignableNode() {}
};
struct AssignmentNode : public ExpressionNode {
// Assignment is not really an expression but it's easier to parse as if it were.
enum Operation {
OP_NONE,
OP_ADDITION,
OP_SUBTRACTION,
OP_MULTIPLICATION,
OP_DIVISION,
OP_MODULO,
OP_POWER,
OP_BIT_SHIFT_LEFT,
OP_BIT_SHIFT_RIGHT,
OP_BIT_AND,
OP_BIT_OR,
OP_BIT_XOR,
};
Operation operation = OP_NONE;
Variant::Operator variant_op = Variant::OP_MAX;
ExpressionNode *assignee = nullptr;
ExpressionNode *assigned_value = nullptr;
bool use_conversion_assign = false;
AssignmentNode() {
type = ASSIGNMENT;
}
};
struct AwaitNode : public ExpressionNode {
ExpressionNode *to_await = nullptr;
AwaitNode() {
type = AWAIT;
}
};
struct BinaryOpNode : public ExpressionNode {
enum OpType {
OP_ADDITION,
OP_SUBTRACTION,
OP_MULTIPLICATION,
OP_DIVISION,
OP_MODULO,
OP_POWER,
OP_BIT_LEFT_SHIFT,
OP_BIT_RIGHT_SHIFT,
OP_BIT_AND,
OP_BIT_OR,
OP_BIT_XOR,
OP_LOGIC_AND,
OP_LOGIC_OR,
OP_CONTENT_TEST,
OP_COMP_EQUAL,
OP_COMP_NOT_EQUAL,
OP_COMP_LESS,
OP_COMP_LESS_EQUAL,
OP_COMP_GREATER,
OP_COMP_GREATER_EQUAL,
};
OpType operation = OpType::OP_ADDITION;
Variant::Operator variant_op = Variant::OP_MAX;
ExpressionNode *left_operand = nullptr;
ExpressionNode *right_operand = nullptr;
BinaryOpNode() {
type = BINARY_OPERATOR;
}
};
struct BreakNode : public Node {
BreakNode() {
type = BREAK;
}
};
struct BreakpointNode : public Node {
BreakpointNode() {
type = BREAKPOINT;
}
};
struct CallNode : public ExpressionNode {
ExpressionNode *callee = nullptr;
Vector<ExpressionNode *> arguments;
StringName function_name;
bool is_super = false;
CallNode() {
type = CALL;
}
Type get_callee_type() const {
if (callee == nullptr) {
return Type::NONE;
} else {
return callee->type;
}
}
};
struct CastNode : public ExpressionNode {
ExpressionNode *operand = nullptr;
TypeNode *cast_type = nullptr;
CastNode() {
type = CAST;
}
};
struct EnumNode : public Node {
struct Value {
IdentifierNode *identifier = nullptr;
ExpressionNode *custom_value = nullptr;
EnumNode *parent_enum = nullptr;
int index = -1;
bool resolved = false;
int64_t value = 0;
int line = 0;
int leftmost_column = 0;
int rightmost_column = 0;
#ifdef TOOLS_ENABLED
MemberDocData doc_data;
#endif // TOOLS_ENABLED
};
IdentifierNode *identifier = nullptr;
Vector<Value> values;
Variant dictionary;
#ifdef TOOLS_ENABLED
MemberDocData doc_data;
#endif // TOOLS_ENABLED
EnumNode() {
type = ENUM;
}
};
struct ClassNode : public Node {
struct Member {
enum Type {
UNDEFINED,
CLASS,
CONSTANT,
FUNCTION,
SIGNAL,
VARIABLE,
ENUM,
ENUM_VALUE, // For unnamed enums.
GROUP, // For member grouping.
};
Type type = UNDEFINED;
union {
ClassNode *m_class = nullptr;
ConstantNode *constant;
FunctionNode *function;
SignalNode *signal;
VariableNode *variable;
EnumNode *m_enum;
AnnotationNode *annotation;
};
EnumNode::Value enum_value;
String get_name() const {
switch (type) {
case UNDEFINED:
return "<undefined member>";
case CLASS:
// All class-type members have an id.
return m_class->identifier->name;
case CONSTANT:
return constant->identifier->name;
case FUNCTION:
return function->identifier->name;
case SIGNAL:
return signal->identifier->name;
case VARIABLE:
return variable->identifier->name;
case ENUM:
// All enum-type members have an id.
return m_enum->identifier->name;
case ENUM_VALUE:
return enum_value.identifier->name;
case GROUP:
return annotation->export_info.name;
}
return "";
}
String get_type_name() const {
switch (type) {
case UNDEFINED:
return "???";
case CLASS:
return "class";
case CONSTANT:
return "constant";
case FUNCTION:
return "function";
case SIGNAL:
return "signal";
case VARIABLE:
return "variable";
case ENUM:
return "enum";
case ENUM_VALUE:
return "enum value";
case GROUP:
return "group";
}
return "";
}
int get_line() const {
switch (type) {
case CLASS:
return m_class->start_line;
case CONSTANT:
return constant->start_line;
case FUNCTION:
return function->start_line;
case VARIABLE:
return variable->start_line;
case ENUM_VALUE:
return enum_value.line;
case ENUM:
return m_enum->start_line;
case SIGNAL:
return signal->start_line;
case GROUP:
return annotation->start_line;
case UNDEFINED:
ERR_FAIL_V_MSG(-1, "Reaching undefined member type.");
}
ERR_FAIL_V_MSG(-1, "Reaching unhandled type.");
}
DataType get_datatype() const {
switch (type) {
case CLASS:
return m_class->get_datatype();
case CONSTANT:
return constant->get_datatype();
case FUNCTION:
return function->get_datatype();
case VARIABLE:
return variable->get_datatype();
case ENUM:
return m_enum->get_datatype();
case ENUM_VALUE:
return enum_value.identifier->get_datatype();
case SIGNAL:
return signal->get_datatype();
case GROUP:
return DataType();
case UNDEFINED:
return DataType();
}
ERR_FAIL_V_MSG(DataType(), "Reaching unhandled type.");
}
Node *get_source_node() const {
switch (type) {
case CLASS:
return m_class;
case CONSTANT:
return constant;
case FUNCTION:
return function;
case VARIABLE:
return variable;
case ENUM:
return m_enum;
case ENUM_VALUE:
return enum_value.identifier;
case SIGNAL:
return signal;
case GROUP:
return annotation;
case UNDEFINED:
return nullptr;
}
ERR_FAIL_V_MSG(nullptr, "Reaching unhandled type.");
}
Member() {}
Member(ClassNode *p_class) {
type = CLASS;
m_class = p_class;
}
Member(ConstantNode *p_constant) {
type = CONSTANT;
constant = p_constant;
}
Member(VariableNode *p_variable) {
type = VARIABLE;
variable = p_variable;
}
Member(SignalNode *p_signal) {
type = SIGNAL;
signal = p_signal;
}
Member(FunctionNode *p_function) {
type = FUNCTION;
function = p_function;
}
Member(EnumNode *p_enum) {
type = ENUM;
m_enum = p_enum;
}
Member(const EnumNode::Value &p_enum_value) {
type = ENUM_VALUE;
enum_value = p_enum_value;
}
Member(AnnotationNode *p_annotation) {
type = GROUP;
annotation = p_annotation;
}
};
IdentifierNode *identifier = nullptr;
String icon_path;
String simplified_icon_path;
Vector<Member> members;
HashMap<StringName, int> members_indices;
ClassNode *outer = nullptr;
bool extends_used = false;
bool onready_used = false;
bool has_static_data = false;
bool annotated_static_unload = false;
String extends_path;
Vector<IdentifierNode *> extends; // List for indexing: extends A.B.C
DataType base_type;
String fqcn; // Fully-qualified class name. Identifies uniquely any class in the project.
#ifdef TOOLS_ENABLED
ClassDocData doc_data;
// EnumValue docs are parsed after itself, so we need a method to add/modify the doc property later.
void set_enum_value_doc_data(const StringName &p_name, const MemberDocData &p_doc_data) {
ERR_FAIL_INDEX(members_indices[p_name], members.size());
members.write[members_indices[p_name]].enum_value.doc_data = p_doc_data;
}
#endif // TOOLS_ENABLED
bool resolved_interface = false;
bool resolved_body = false;
StringName get_global_name() const {
return (outer == nullptr && identifier != nullptr) ? identifier->name : StringName();
}
Member get_member(const StringName &p_name) const {
return members[members_indices[p_name]];
}
bool has_member(const StringName &p_name) const {
return members_indices.has(p_name);
}
bool has_function(const StringName &p_name) const {
return has_member(p_name) && members[members_indices[p_name]].type == Member::FUNCTION;
}
template <class T>
void add_member(T *p_member_node) {
members_indices[p_member_node->identifier->name] = members.size();
members.push_back(Member(p_member_node));
}
void add_member(const EnumNode::Value &p_enum_value) {
members_indices[p_enum_value.identifier->name] = members.size();
members.push_back(Member(p_enum_value));
}
void add_member_group(AnnotationNode *p_annotation_node) {
// Avoid name conflict. See GH-78252.
StringName name = vformat("@group_%d_%s", members.size(), p_annotation_node->export_info.name);
members_indices[name] = members.size();
members.push_back(Member(p_annotation_node));
}
ClassNode() {
type = CLASS;
}
};
struct ConstantNode : public AssignableNode {
#ifdef TOOLS_ENABLED
MemberDocData doc_data;
#endif // TOOLS_ENABLED
ConstantNode() {
type = CONSTANT;
}
};
struct ContinueNode : public Node {
ContinueNode() {
type = CONTINUE;
}
};
struct DictionaryNode : public ExpressionNode {
struct Pair {
ExpressionNode *key = nullptr;
ExpressionNode *value = nullptr;
};
Vector<Pair> elements;
enum Style {
LUA_TABLE,
PYTHON_DICT,
};
Style style = PYTHON_DICT;
DictionaryNode() {
type = DICTIONARY;
}
};
struct ForNode : public Node {
IdentifierNode *variable = nullptr;
TypeNode *datatype_specifier = nullptr;
bool use_conversion_assign = false;
ExpressionNode *list = nullptr;
SuiteNode *loop = nullptr;
ForNode() {
type = FOR;
}
};
struct FunctionNode : public Node {
IdentifierNode *identifier = nullptr;
Vector<ParameterNode *> parameters;
HashMap<StringName, int> parameters_indices;
TypeNode *return_type = nullptr;
SuiteNode *body = nullptr;
bool is_static = false; // For lambdas it's determined in the analyzer.
bool is_coroutine = false;
Variant rpc_config;
MethodInfo info;
LambdaNode *source_lambda = nullptr;
Vector<Variant> default_arg_values;
#ifdef TOOLS_ENABLED
MemberDocData doc_data;
#endif // TOOLS_ENABLED
bool resolved_signature = false;
bool resolved_body = false;
FunctionNode() {
type = FUNCTION;
}
};
struct GetNodeNode : public ExpressionNode {
String full_path;
bool use_dollar = true;
GetNodeNode() {
type = GET_NODE;
}
};
struct IdentifierNode : public ExpressionNode {
StringName name;
SuiteNode *suite = nullptr; // The block in which the identifier is used.
enum Source {
UNDEFINED_SOURCE,
FUNCTION_PARAMETER,
LOCAL_VARIABLE,
LOCAL_CONSTANT,
LOCAL_ITERATOR, // `for` loop iterator.
LOCAL_BIND, // Pattern bind.
MEMBER_VARIABLE,
MEMBER_CONSTANT,
MEMBER_FUNCTION,
MEMBER_SIGNAL,
MEMBER_CLASS,
INHERITED_VARIABLE,
STATIC_VARIABLE,
};
Source source = UNDEFINED_SOURCE;
union {
ParameterNode *parameter_source = nullptr;
ConstantNode *constant_source;
VariableNode *variable_source;
IdentifierNode *bind_source;
};
FunctionNode *source_function = nullptr;
int usages = 0; // Useful for binds/iterator variable.
IdentifierNode() {
type = IDENTIFIER;
}
};
struct IfNode : public Node {
ExpressionNode *condition = nullptr;
SuiteNode *true_block = nullptr;
SuiteNode *false_block = nullptr;
IfNode() {
type = IF;
}
};
struct LambdaNode : public ExpressionNode {
FunctionNode *function = nullptr;
FunctionNode *parent_function = nullptr;
LambdaNode *parent_lambda = nullptr;
Vector<IdentifierNode *> captures;
HashMap<StringName, int> captures_indices;
bool use_self = false;
bool has_name() const {
return function && function->identifier;
}
LambdaNode() {
type = LAMBDA;
}
};
struct LiteralNode : public ExpressionNode {
Variant value;
LiteralNode() {
type = LITERAL;
}
};
struct MatchNode : public Node {
ExpressionNode *test = nullptr;
Vector<MatchBranchNode *> branches;
MatchNode() {
type = MATCH;
}
};
struct MatchBranchNode : public Node {
Vector<PatternNode *> patterns;
SuiteNode *block = nullptr;
bool has_wildcard = false;
SuiteNode *guard_body = nullptr;
MatchBranchNode() {
type = MATCH_BRANCH;
}
};
struct ParameterNode : public AssignableNode {
ParameterNode() {
type = PARAMETER;
}
};
struct PassNode : public Node {
PassNode() {
type = PASS;
}
};
struct PatternNode : public Node {
enum Type {
PT_LITERAL,
PT_EXPRESSION,
PT_BIND,
PT_ARRAY,
PT_DICTIONARY,
PT_REST,
PT_WILDCARD,
};
Type pattern_type = PT_LITERAL;
union {
LiteralNode *literal = nullptr;
IdentifierNode *bind;
ExpressionNode *expression;
};
Vector<PatternNode *> array;
bool rest_used = false; // For array/dict patterns.
struct Pair {
ExpressionNode *key = nullptr;
PatternNode *value_pattern = nullptr;
};
Vector<Pair> dictionary;
HashMap<StringName, IdentifierNode *> binds;
bool has_bind(const StringName &p_name);
IdentifierNode *get_bind(const StringName &p_name);
PatternNode() {
type = PATTERN;
}
};
struct PreloadNode : public ExpressionNode {
ExpressionNode *path = nullptr;
String resolved_path;
Ref<Resource> resource;
PreloadNode() {
type = PRELOAD;
}
};
struct ReturnNode : public Node {
ExpressionNode *return_value = nullptr;
bool void_return = false;
ReturnNode() {
type = RETURN;
}
};
struct SelfNode : public ExpressionNode {
ClassNode *current_class = nullptr;
SelfNode() {
type = SELF;
}
};
struct SignalNode : public Node {
IdentifierNode *identifier = nullptr;
Vector<ParameterNode *> parameters;
HashMap<StringName, int> parameters_indices;
MethodInfo method_info;
#ifdef TOOLS_ENABLED
MemberDocData doc_data;
#endif // TOOLS_ENABLED
SignalNode() {
type = SIGNAL;
}
};
struct SubscriptNode : public ExpressionNode {
ExpressionNode *base = nullptr;
union {
ExpressionNode *index = nullptr;
IdentifierNode *attribute;
};
bool is_attribute = false;
SubscriptNode() {
type = SUBSCRIPT;
}
};
struct SuiteNode : public Node {
SuiteNode *parent_block = nullptr;
Vector<Node *> statements;
struct Local {
enum Type {
UNDEFINED,
CONSTANT,
VARIABLE,
PARAMETER,
FOR_VARIABLE,
PATTERN_BIND,
};
Type type = UNDEFINED;
union {
ConstantNode *constant = nullptr;
VariableNode *variable;
ParameterNode *parameter;
IdentifierNode *bind;
};
StringName name;
FunctionNode *source_function = nullptr;
int start_line = 0, end_line = 0;
int start_column = 0, end_column = 0;
int leftmost_column = 0, rightmost_column = 0;
DataType get_datatype() const;
String get_name() const;
Local() {}
Local(ConstantNode *p_constant, FunctionNode *p_source_function) {
type = CONSTANT;
constant = p_constant;
name = p_constant->identifier->name;
source_function = p_source_function;
start_line = p_constant->start_line;
end_line = p_constant->end_line;
start_column = p_constant->start_column;
end_column = p_constant->end_column;
leftmost_column = p_constant->leftmost_column;
rightmost_column = p_constant->rightmost_column;
}
Local(VariableNode *p_variable, FunctionNode *p_source_function) {
type = VARIABLE;
variable = p_variable;
name = p_variable->identifier->name;
source_function = p_source_function;
start_line = p_variable->start_line;
end_line = p_variable->end_line;
start_column = p_variable->start_column;
end_column = p_variable->end_column;
leftmost_column = p_variable->leftmost_column;
rightmost_column = p_variable->rightmost_column;
}
Local(ParameterNode *p_parameter, FunctionNode *p_source_function) {
type = PARAMETER;
parameter = p_parameter;
name = p_parameter->identifier->name;
source_function = p_source_function;
start_line = p_parameter->start_line;
end_line = p_parameter->end_line;
start_column = p_parameter->start_column;
end_column = p_parameter->end_column;
leftmost_column = p_parameter->leftmost_column;
rightmost_column = p_parameter->rightmost_column;
}
Local(IdentifierNode *p_identifier, FunctionNode *p_source_function) {
type = FOR_VARIABLE;
bind = p_identifier;
name = p_identifier->name;
source_function = p_source_function;
start_line = p_identifier->start_line;
end_line = p_identifier->end_line;
start_column = p_identifier->start_column;
end_column = p_identifier->end_column;
leftmost_column = p_identifier->leftmost_column;
rightmost_column = p_identifier->rightmost_column;
}
};
Local empty;
Vector<Local> locals;
HashMap<StringName, int> locals_indices;
FunctionNode *parent_function = nullptr;
IfNode *parent_if = nullptr;
bool has_return = false;
bool has_continue = false;
bool has_unreachable_code = false; // Just so warnings aren't given more than once per block.
bool is_in_loop = false; // The block is nested in a loop (directly or indirectly).
bool has_local(const StringName &p_name) const;
const Local &get_local(const StringName &p_name) const;
template <class T>
void add_local(T *p_local, FunctionNode *p_source_function) {
locals_indices[p_local->identifier->name] = locals.size();
locals.push_back(Local(p_local, p_source_function));
}
void add_local(const Local &p_local) {
locals_indices[p_local.name] = locals.size();
locals.push_back(p_local);
}
SuiteNode() {
type = SUITE;
}
};
struct TernaryOpNode : public ExpressionNode {
// Only one ternary operation exists, so no abstraction here.
ExpressionNode *condition = nullptr;
ExpressionNode *true_expr = nullptr;
ExpressionNode *false_expr = nullptr;
TernaryOpNode() {
type = TERNARY_OPERATOR;
}
};
struct TypeNode : public Node {
Vector<IdentifierNode *> type_chain;
Vector<TypeNode *> container_types;
TypeNode *get_container_type_or_null(int p_index) const {
return p_index >= 0 && p_index < container_types.size() ? container_types[p_index] : nullptr;
}
TypeNode() {
type = TYPE;
}
};
struct TypeTestNode : public ExpressionNode {
ExpressionNode *operand = nullptr;
TypeNode *test_type = nullptr;
DataType test_datatype;
TypeTestNode() {
type = TYPE_TEST;
}
};
struct UnaryOpNode : public ExpressionNode {
enum OpType {
OP_POSITIVE,
OP_NEGATIVE,
OP_COMPLEMENT,
OP_LOGIC_NOT,
};
OpType operation = OP_POSITIVE;
Variant::Operator variant_op = Variant::OP_MAX;
ExpressionNode *operand = nullptr;
UnaryOpNode() {
type = UNARY_OPERATOR;
}
};
struct VariableNode : public AssignableNode {
enum PropertyStyle {
PROP_NONE,
PROP_INLINE,
PROP_SETGET,
};
PropertyStyle property = PROP_NONE;
union {
FunctionNode *setter = nullptr;
IdentifierNode *setter_pointer;
};
IdentifierNode *setter_parameter = nullptr;
union {
FunctionNode *getter = nullptr;
IdentifierNode *getter_pointer;
};
bool exported = false;
bool onready = false;
PropertyInfo export_info;
int assignments = 0;
bool is_static = false;
#ifdef TOOLS_ENABLED
MemberDocData doc_data;
#endif // TOOLS_ENABLED
VariableNode() {
type = VARIABLE;
}
};
struct WhileNode : public Node {
ExpressionNode *condition = nullptr;
SuiteNode *loop = nullptr;
WhileNode() {
type = WHILE;
}
};
enum CompletionType {
COMPLETION_NONE,
COMPLETION_ANNOTATION, // Annotation (following @).
COMPLETION_ANNOTATION_ARGUMENTS, // Annotation arguments hint.
COMPLETION_ASSIGN, // Assignment based on type (e.g. enum values).
COMPLETION_ATTRIBUTE, // After id.| to look for members.
COMPLETION_ATTRIBUTE_METHOD, // After id.| to look for methods.
COMPLETION_BUILT_IN_TYPE_CONSTANT_OR_STATIC_METHOD, // Constants inside a built-in type (e.g. Color.BLUE) or static methods (e.g. Color.html).
COMPLETION_CALL_ARGUMENTS, // Complete with nodes, input actions, enum values (or usual expressions).
// TODO: COMPLETION_DECLARATION, // Potential declaration (var, const, func).
COMPLETION_GET_NODE, // Get node with $ notation.
COMPLETION_IDENTIFIER, // List available identifiers in scope.
COMPLETION_INHERIT_TYPE, // Type after extends. Exclude non-viable types (built-ins, enums, void). Includes subtypes using the argument index.
COMPLETION_METHOD, // List available methods in scope.
COMPLETION_OVERRIDE_METHOD, // Override implementation, also for native virtuals.
COMPLETION_PROPERTY_DECLARATION, // Property declaration (get, set).
COMPLETION_PROPERTY_DECLARATION_OR_TYPE, // Property declaration (get, set) or a type hint.
COMPLETION_PROPERTY_METHOD, // Property setter or getter (list available methods).
COMPLETION_RESOURCE_PATH, // For load/preload.
COMPLETION_SUBSCRIPT, // Inside id[|].
COMPLETION_SUPER_METHOD, // After super.
COMPLETION_TYPE_ATTRIBUTE, // Attribute in type name (Type.|).
COMPLETION_TYPE_NAME, // Name of type (after :).
COMPLETION_TYPE_NAME_OR_VOID, // Same as TYPE_NAME, but allows void (in function return type).
};
struct CompletionContext {
CompletionType type = COMPLETION_NONE;
ClassNode *current_class = nullptr;
FunctionNode *current_function = nullptr;
SuiteNode *current_suite = nullptr;
int current_line = -1;
int current_argument = -1;
Variant::Type builtin_type = Variant::VARIANT_MAX;
Node *node = nullptr;
Object *base = nullptr;
List<Ref<GDScriptParserRef>> dependent_parsers;
};
struct CompletionCall {
Node *call = nullptr;
int argument = -1;
};
private:
friend class GDScriptAnalyzer;
bool _is_tool = false;
String script_path;
bool for_completion = false;
bool panic_mode = false;
bool can_break = false;
bool can_continue = false;
List<bool> multiline_stack;
ClassNode *head = nullptr;
Node *list = nullptr;
List<ParserError> errors;
#ifdef DEBUG_ENABLED
bool is_ignoring_warnings = false;
List<GDScriptWarning> warnings;
HashSet<GDScriptWarning::Code> ignored_warnings;
HashSet<int> unsafe_lines;
#endif
GDScriptTokenizer tokenizer;
GDScriptTokenizer::Token previous;
GDScriptTokenizer::Token current;
ClassNode *current_class = nullptr;
FunctionNode *current_function = nullptr;
LambdaNode *current_lambda = nullptr;
SuiteNode *current_suite = nullptr;
CompletionContext completion_context;
CompletionCall completion_call;
List<CompletionCall> completion_call_stack;
bool passed_cursor = false;
bool in_lambda = false;
bool lambda_ended = false; // Marker for when a lambda ends, to apply an end of statement if needed.
typedef bool (GDScriptParser::*AnnotationAction)(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
struct AnnotationInfo {
enum TargetKind {
NONE = 0,
SCRIPT = 1 << 0,
CLASS = 1 << 1,
VARIABLE = 1 << 2,
CONSTANT = 1 << 3,
SIGNAL = 1 << 4,
FUNCTION = 1 << 5,
STATEMENT = 1 << 6,
STANDALONE = 1 << 7,
CLASS_LEVEL = CLASS | VARIABLE | FUNCTION,
};
uint32_t target_kind = 0; // Flags.
AnnotationAction apply = nullptr;
MethodInfo info;
};
static HashMap<StringName, AnnotationInfo> valid_annotations;
List<AnnotationNode *> annotation_stack;
typedef ExpressionNode *(GDScriptParser::*ParseFunction)(ExpressionNode *p_previous_operand, bool p_can_assign);
// Higher value means higher precedence (i.e. is evaluated first).
enum Precedence {
PREC_NONE,
PREC_ASSIGNMENT,
PREC_CAST,
PREC_TERNARY,
PREC_LOGIC_OR,
PREC_LOGIC_AND,
PREC_LOGIC_NOT,
PREC_CONTENT_TEST,
PREC_COMPARISON,
PREC_BIT_OR,
PREC_BIT_XOR,
PREC_BIT_AND,
PREC_BIT_SHIFT,
PREC_ADDITION_SUBTRACTION,
PREC_FACTOR,
PREC_SIGN,
PREC_BIT_NOT,
PREC_POWER,
PREC_TYPE_TEST,
PREC_AWAIT,
PREC_CALL,
PREC_ATTRIBUTE,
PREC_SUBSCRIPT,
PREC_PRIMARY,
};
struct ParseRule {
ParseFunction prefix = nullptr;
ParseFunction infix = nullptr;
Precedence precedence = PREC_NONE;
};
static ParseRule *get_rule(GDScriptTokenizer::Token::Type p_token_type);
List<Node *> nodes_in_progress;
void complete_extents(Node *p_node);
void update_extents(Node *p_node);
void reset_extents(Node *p_node, GDScriptTokenizer::Token p_token);
void reset_extents(Node *p_node, Node *p_from);
template <class T>
T *alloc_node() {
T *node = memnew(T);
node->next = list;
list = node;
reset_extents(node, previous);
nodes_in_progress.push_back(node);
return node;
}
void clear();
void push_error(const String &p_message, const Node *p_origin = nullptr);
#ifdef DEBUG_ENABLED
void push_warning(const Node *p_source, GDScriptWarning::Code p_code, const Vector<String> &p_symbols);
template <typename... Symbols>
void push_warning(const Node *p_source, GDScriptWarning::Code p_code, const Symbols &...p_symbols) {
push_warning(p_source, p_code, Vector<String>{ p_symbols... });
}
#endif
void make_completion_context(CompletionType p_type, Node *p_node, int p_argument = -1, bool p_force = false);
void make_completion_context(CompletionType p_type, Variant::Type p_builtin_type, bool p_force = false);
void push_completion_call(Node *p_call);
void pop_completion_call();
void set_last_completion_call_arg(int p_argument);
GDScriptTokenizer::Token advance();
bool match(GDScriptTokenizer::Token::Type p_token_type);
bool check(GDScriptTokenizer::Token::Type p_token_type) const;
bool consume(GDScriptTokenizer::Token::Type p_token_type, const String &p_error_message);
bool is_at_end() const;
bool is_statement_end_token() const;
bool is_statement_end() const;
void end_statement(const String &p_context);
void synchronize();
void push_multiline(bool p_state);
void pop_multiline();
// Main blocks.
void parse_program();
ClassNode *parse_class(bool p_is_static);
void parse_class_name();
void parse_extends();
void parse_class_body(bool p_is_multiline);
template <class T>
void parse_class_member(T *(GDScriptParser::*p_parse_function)(bool), AnnotationInfo::TargetKind p_target, const String &p_member_kind, bool p_is_static = false);
SignalNode *parse_signal(bool p_is_static);
EnumNode *parse_enum(bool p_is_static);
ParameterNode *parse_parameter();
FunctionNode *parse_function(bool p_is_static);
void parse_function_signature(FunctionNode *p_function, SuiteNode *p_body, const String &p_type);
SuiteNode *parse_suite(const String &p_context, SuiteNode *p_suite = nullptr, bool p_for_lambda = false);
// Annotations
AnnotationNode *parse_annotation(uint32_t p_valid_targets);
static bool register_annotation(const MethodInfo &p_info, uint32_t p_target_kinds, AnnotationAction p_apply, const Vector<Variant> &p_default_arguments = Vector<Variant>(), bool p_is_vararg = false);
bool validate_annotation_arguments(AnnotationNode *p_annotation);
void clear_unused_annotations();
bool tool_annotation(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
bool icon_annotation(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
bool onready_annotation(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
template <PropertyHint t_hint, Variant::Type t_type>
bool export_annotations(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
template <PropertyUsageFlags t_usage>
bool export_group_annotations(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
bool warning_annotations(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
bool rpc_annotation(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
bool static_unload_annotation(const AnnotationNode *p_annotation, Node *p_target, ClassNode *p_class);
// Statements.
Node *parse_statement();
VariableNode *parse_variable(bool p_is_static);
VariableNode *parse_variable(bool p_is_static, bool p_allow_property);
VariableNode *parse_property(VariableNode *p_variable, bool p_need_indent);
void parse_property_getter(VariableNode *p_variable);
void parse_property_setter(VariableNode *p_variable);
ConstantNode *parse_constant(bool p_is_static);
AssertNode *parse_assert();
BreakNode *parse_break();
ContinueNode *parse_continue();
ForNode *parse_for();
IfNode *parse_if(const String &p_token = "if");
MatchNode *parse_match();
MatchBranchNode *parse_match_branch();
PatternNode *parse_match_pattern(PatternNode *p_root_pattern = nullptr);
WhileNode *parse_while();
// Expressions.
ExpressionNode *parse_expression(bool p_can_assign, bool p_stop_on_assign = false);
ExpressionNode *parse_precedence(Precedence p_precedence, bool p_can_assign, bool p_stop_on_assign = false);
ExpressionNode *parse_literal(ExpressionNode *p_previous_operand, bool p_can_assign);
LiteralNode *parse_literal();
ExpressionNode *parse_self(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_identifier(ExpressionNode *p_previous_operand, bool p_can_assign);
IdentifierNode *parse_identifier();
ExpressionNode *parse_builtin_constant(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_unary_operator(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_binary_operator(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_binary_not_in_operator(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_ternary_operator(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_assignment(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_array(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_dictionary(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_call(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_get_node(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_preload(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_grouping(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_cast(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_await(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_attribute(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_subscript(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_lambda(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_type_test(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_yield(ExpressionNode *p_previous_operand, bool p_can_assign);
ExpressionNode *parse_invalid_token(ExpressionNode *p_previous_operand, bool p_can_assign);
TypeNode *parse_type(bool p_allow_void = false);
#ifdef TOOLS_ENABLED
int max_script_doc_line = INT_MAX;
int min_member_doc_line = 1;
bool has_comment(int p_line, bool p_must_be_doc = false);
MemberDocData parse_doc_comment(int p_line, bool p_single_line = false);
ClassDocData parse_class_doc_comment(int p_line, bool p_single_line = false);
#endif // TOOLS_ENABLED
public:
Error parse(const String &p_source_code, const String &p_script_path, bool p_for_completion);
ClassNode *get_tree() const { return head; }
bool is_tool() const { return _is_tool; }
ClassNode *find_class(const String &p_qualified_name) const;
bool has_class(const GDScriptParser::ClassNode *p_class) const;
static Variant::Type get_builtin_type(const StringName &p_type); // Excluding `Variant::NIL` and `Variant::OBJECT`.
CompletionContext get_completion_context() const { return completion_context; }
CompletionCall get_completion_call() const { return completion_call; }
void get_annotation_list(List<MethodInfo> *r_annotations) const;
bool annotation_exists(const String &p_annotation_name) const;
const List<ParserError> &get_errors() const { return errors; }
const List<String> get_dependencies() const {
// TODO: Keep track of deps.
return List<String>();
}
#ifdef DEBUG_ENABLED
const List<GDScriptWarning> &get_warnings() const { return warnings; }
const HashSet<int> &get_unsafe_lines() const { return unsafe_lines; }
int get_last_line_number() const { return current.end_line; }
#endif
#ifdef TOOLS_ENABLED
static HashMap<String, String> theme_color_names;
#endif // TOOLS_ENABLED
GDScriptParser();
~GDScriptParser();
#ifdef DEBUG_ENABLED
class TreePrinter {
int indent_level = 0;
String indent;
StringBuilder printed;
bool pending_indent = false;
void increase_indent();
void decrease_indent();
void push_line(const String &p_line = String());
void push_text(const String &p_text);
void print_annotation(const AnnotationNode *p_annotation);
void print_array(ArrayNode *p_array);
void print_assert(AssertNode *p_assert);
void print_assignment(AssignmentNode *p_assignment);
void print_await(AwaitNode *p_await);
void print_binary_op(BinaryOpNode *p_binary_op);
void print_call(CallNode *p_call);
void print_cast(CastNode *p_cast);
void print_class(ClassNode *p_class);
void print_constant(ConstantNode *p_constant);
void print_dictionary(DictionaryNode *p_dictionary);
void print_expression(ExpressionNode *p_expression);
void print_enum(EnumNode *p_enum);
void print_for(ForNode *p_for);
void print_function(FunctionNode *p_function, const String &p_context = "Function");
void print_get_node(GetNodeNode *p_get_node);
void print_if(IfNode *p_if, bool p_is_elif = false);
void print_identifier(IdentifierNode *p_identifier);
void print_lambda(LambdaNode *p_lambda);
void print_literal(LiteralNode *p_literal);
void print_match(MatchNode *p_match);
void print_match_branch(MatchBranchNode *p_match_branch);
void print_match_pattern(PatternNode *p_match_pattern);
void print_parameter(ParameterNode *p_parameter);
void print_preload(PreloadNode *p_preload);
void print_return(ReturnNode *p_return);
void print_self(SelfNode *p_self);
void print_signal(SignalNode *p_signal);
void print_statement(Node *p_statement);
void print_subscript(SubscriptNode *p_subscript);
void print_suite(SuiteNode *p_suite);
void print_ternary_op(TernaryOpNode *p_ternary_op);
void print_type(TypeNode *p_type);
void print_type_test(TypeTestNode *p_type_test);
void print_unary_op(UnaryOpNode *p_unary_op);
void print_variable(VariableNode *p_variable);
void print_while(WhileNode *p_while);
public:
void print_tree(const GDScriptParser &p_parser);
};
#endif // DEBUG_ENABLED
static void cleanup();
};
#endif // GDSCRIPT_PARSER_H
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