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gdscript_parser.cpp
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/**************************************************************************/
/* gdscript_parser.cpp */
/**************************************************************************/
/* 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. */
/**************************************************************************/
#include "gdscript_parser.h"
#include "gdscript.h"
#include "gdscript_tokenizer_buffer.h"
#include "core/config/project_settings.h"
#include "core/io/file_access.h"
#include "core/io/resource_loader.h"
#include "core/math/math_defs.h"
#include "scene/main/multiplayer_api.h"
#ifdef DEBUG_ENABLED
#include "core/os/os.h"
#include "core/string/string_buffer.h"
#include "servers/text_server.h"
#endif
#ifdef TOOLS_ENABLED
#include "editor/editor_settings.h"
#endif
// This function is used to determine that a type is "built-in" as opposed to native
// and custom classes. So `Variant::NIL` and `Variant::OBJECT` are excluded:
// `Variant::NIL` - `null` is literal, not a type.
// `Variant::OBJECT` - `Object` should be treated as a class, not as a built-in type.
static HashMap<StringName, Variant::Type> builtin_types;
Variant::Type GDScriptParser::get_builtin_type(const StringName &p_type) {
if (unlikely(builtin_types.is_empty())) {
for (int i = 0; i < Variant::VARIANT_MAX; i++) {
Variant::Type type = (Variant::Type)i;
if (type != Variant::NIL && type != Variant::OBJECT) {
builtin_types[Variant::get_type_name(type)] = type;
}
}
}
if (builtin_types.has(p_type)) {
return builtin_types[p_type];
}
return Variant::VARIANT_MAX;
}
#ifdef TOOLS_ENABLED
HashMap<String, String> GDScriptParser::theme_color_names;
#endif
HashMap<StringName, GDScriptParser::AnnotationInfo> GDScriptParser::valid_annotations;
void GDScriptParser::cleanup() {
builtin_types.clear();
valid_annotations.clear();
}
void GDScriptParser::get_annotation_list(List<MethodInfo> *r_annotations) const {
for (const KeyValue<StringName, AnnotationInfo> &E : valid_annotations) {
r_annotations->push_back(E.value.info);
}
}
bool GDScriptParser::annotation_exists(const String &p_annotation_name) const {
return valid_annotations.has(p_annotation_name);
}
GDScriptParser::GDScriptParser() {
// Register valid annotations.
if (unlikely(valid_annotations.is_empty())) {
register_annotation(MethodInfo("@tool"), AnnotationInfo::SCRIPT, &GDScriptParser::tool_annotation);
register_annotation(MethodInfo("@icon", PropertyInfo(Variant::STRING, "icon_path")), AnnotationInfo::SCRIPT, &GDScriptParser::icon_annotation);
register_annotation(MethodInfo("@static_unload"), AnnotationInfo::SCRIPT, &GDScriptParser::static_unload_annotation);
register_annotation(MethodInfo("@onready"), AnnotationInfo::VARIABLE, &GDScriptParser::onready_annotation);
// Export annotations.
register_annotation(MethodInfo("@export"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_NONE, Variant::NIL>);
register_annotation(MethodInfo("@export_enum", PropertyInfo(Variant::STRING, "names")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_ENUM, Variant::NIL>, varray(), true);
register_annotation(MethodInfo("@export_file", PropertyInfo(Variant::STRING, "filter")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_FILE, Variant::STRING>, varray(""), true);
register_annotation(MethodInfo("@export_dir"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_DIR, Variant::STRING>);
register_annotation(MethodInfo("@export_global_file", PropertyInfo(Variant::STRING, "filter")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_GLOBAL_FILE, Variant::STRING>, varray(""), true);
register_annotation(MethodInfo("@export_global_dir"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_GLOBAL_DIR, Variant::STRING>);
register_annotation(MethodInfo("@export_multiline"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_MULTILINE_TEXT, Variant::STRING>);
register_annotation(MethodInfo("@export_placeholder", PropertyInfo(Variant::STRING, "placeholder")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_PLACEHOLDER_TEXT, Variant::STRING>);
register_annotation(MethodInfo("@export_range", PropertyInfo(Variant::FLOAT, "min"), PropertyInfo(Variant::FLOAT, "max"), PropertyInfo(Variant::FLOAT, "step"), PropertyInfo(Variant::STRING, "extra_hints")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_RANGE, Variant::FLOAT>, varray(1.0, ""), true);
register_annotation(MethodInfo("@export_exp_easing", PropertyInfo(Variant::STRING, "hints")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_EXP_EASING, Variant::FLOAT>, varray(""), true);
register_annotation(MethodInfo("@export_color_no_alpha"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_COLOR_NO_ALPHA, Variant::COLOR>);
register_annotation(MethodInfo("@export_node_path", PropertyInfo(Variant::STRING, "type")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_NODE_PATH_VALID_TYPES, Variant::NODE_PATH>, varray(""), true);
register_annotation(MethodInfo("@export_flags", PropertyInfo(Variant::STRING, "names")), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_FLAGS, Variant::INT>, varray(), true);
register_annotation(MethodInfo("@export_flags_2d_render"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_2D_RENDER, Variant::INT>);
register_annotation(MethodInfo("@export_flags_2d_physics"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_2D_PHYSICS, Variant::INT>);
register_annotation(MethodInfo("@export_flags_2d_navigation"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_2D_NAVIGATION, Variant::INT>);
register_annotation(MethodInfo("@export_flags_3d_render"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_3D_RENDER, Variant::INT>);
register_annotation(MethodInfo("@export_flags_3d_physics"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_3D_PHYSICS, Variant::INT>);
register_annotation(MethodInfo("@export_flags_3d_navigation"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_3D_NAVIGATION, Variant::INT>);
register_annotation(MethodInfo("@export_flags_avoidance"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_AVOIDANCE, Variant::INT>);
register_annotation(MethodInfo("@export_storage"), AnnotationInfo::VARIABLE, &GDScriptParser::export_storage_annotation);
register_annotation(MethodInfo("@export_custom", PropertyInfo(Variant::INT, "hint", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_CLASS_IS_ENUM, "PropertyHint"), PropertyInfo(Variant::STRING, "hint_string"), PropertyInfo(Variant::INT, "usage", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_CLASS_IS_BITFIELD, "PropertyUsageFlags")), AnnotationInfo::VARIABLE, &GDScriptParser::export_custom_annotation, varray(PROPERTY_USAGE_DEFAULT));
register_annotation(MethodInfo("@export_tool_button", PropertyInfo(Variant::STRING, "text"), PropertyInfo(Variant::STRING, "icon")), AnnotationInfo::VARIABLE, &GDScriptParser::export_tool_button_annotation, varray(""));
// Export grouping annotations.
register_annotation(MethodInfo("@export_category", PropertyInfo(Variant::STRING, "name")), AnnotationInfo::STANDALONE, &GDScriptParser::export_group_annotations<PROPERTY_USAGE_CATEGORY>);
register_annotation(MethodInfo("@export_group", PropertyInfo(Variant::STRING, "name"), PropertyInfo(Variant::STRING, "prefix")), AnnotationInfo::STANDALONE, &GDScriptParser::export_group_annotations<PROPERTY_USAGE_GROUP>, varray(""));
register_annotation(MethodInfo("@export_subgroup", PropertyInfo(Variant::STRING, "name"), PropertyInfo(Variant::STRING, "prefix")), AnnotationInfo::STANDALONE, &GDScriptParser::export_group_annotations<PROPERTY_USAGE_SUBGROUP>, varray(""));
// Warning annotations.
register_annotation(MethodInfo("@warning_ignore", PropertyInfo(Variant::STRING, "warning")), AnnotationInfo::CLASS_LEVEL | AnnotationInfo::STATEMENT, &GDScriptParser::warning_annotations, varray(), true);
// Networking.
register_annotation(MethodInfo("@rpc", PropertyInfo(Variant::STRING, "mode"), PropertyInfo(Variant::STRING, "sync"), PropertyInfo(Variant::STRING, "transfer_mode"), PropertyInfo(Variant::INT, "transfer_channel")), AnnotationInfo::FUNCTION, &GDScriptParser::rpc_annotation, varray("authority", "call_remote", "unreliable", 0));
}
#ifdef DEBUG_ENABLED
is_ignoring_warnings = !(bool)GLOBAL_GET("debug/gdscript/warnings/enable");
#endif
#ifdef TOOLS_ENABLED
if (unlikely(theme_color_names.is_empty())) {
// Vectors.
theme_color_names.insert("x", "axis_x_color");
theme_color_names.insert("y", "axis_y_color");
theme_color_names.insert("z", "axis_z_color");
theme_color_names.insert("w", "axis_w_color");
// Color.
theme_color_names.insert("r", "axis_x_color");
theme_color_names.insert("r8", "axis_x_color");
theme_color_names.insert("g", "axis_y_color");
theme_color_names.insert("g8", "axis_y_color");
theme_color_names.insert("b", "axis_z_color");
theme_color_names.insert("b8", "axis_z_color");
theme_color_names.insert("a", "axis_w_color");
theme_color_names.insert("a8", "axis_w_color");
}
#endif
}
GDScriptParser::~GDScriptParser() {
while (list != nullptr) {
Node *element = list;
list = list->next;
memdelete(element);
}
}
void GDScriptParser::clear() {
GDScriptParser tmp;
tmp = *this;
*this = GDScriptParser();
}
void GDScriptParser::push_error(const String &p_message, const Node *p_origin) {
// TODO: Improve error reporting by pointing at source code.
// TODO: Errors might point at more than one place at once (e.g. show previous declaration).
panic_mode = true;
// TODO: Improve positional information.
if (p_origin == nullptr) {
errors.push_back({ p_message, previous.start_line, previous.start_column });
} else {
errors.push_back({ p_message, p_origin->start_line, p_origin->leftmost_column });
}
}
#ifdef DEBUG_ENABLED
void GDScriptParser::push_warning(const Node *p_source, GDScriptWarning::Code p_code, const Vector<String> &p_symbols) {
ERR_FAIL_NULL(p_source);
ERR_FAIL_INDEX(p_code, GDScriptWarning::WARNING_MAX);
if (is_ignoring_warnings) {
return;
}
if (GLOBAL_GET("debug/gdscript/warnings/exclude_addons").booleanize() && script_path.begins_with("res://addons/")) {
return;
}
GDScriptWarning::WarnLevel warn_level = (GDScriptWarning::WarnLevel)(int)GLOBAL_GET(GDScriptWarning::get_settings_path_from_code(p_code));
if (warn_level == GDScriptWarning::IGNORE) {
return;
}
PendingWarning pw;
pw.source = p_source;
pw.code = p_code;
pw.treated_as_error = warn_level == GDScriptWarning::ERROR;
pw.symbols = p_symbols;
pending_warnings.push_back(pw);
}
void GDScriptParser::apply_pending_warnings() {
for (const PendingWarning &pw : pending_warnings) {
if (warning_ignored_lines[pw.code].has(pw.source->start_line)) {
continue;
}
GDScriptWarning warning;
warning.code = pw.code;
warning.symbols = pw.symbols;
warning.start_line = pw.source->start_line;
warning.end_line = pw.source->end_line;
warning.leftmost_column = pw.source->leftmost_column;
warning.rightmost_column = pw.source->rightmost_column;
if (pw.treated_as_error) {
push_error(warning.get_message() + String(" (Warning treated as error.)"), pw.source);
continue;
}
List<GDScriptWarning>::Element *before = nullptr;
for (List<GDScriptWarning>::Element *E = warnings.front(); E; E = E->next()) {
if (E->get().start_line > warning.start_line) {
break;
}
before = E;
}
if (before) {
warnings.insert_after(before, warning);
} else {
warnings.push_front(warning);
}
}
pending_warnings.clear();
}
#endif // DEBUG_ENABLED
void GDScriptParser::override_completion_context(const Node *p_for_node, CompletionType p_type, Node *p_node, int p_argument) {
if (!for_completion) {
return;
}
if (p_for_node == nullptr || completion_context.node != p_for_node) {
return;
}
CompletionContext context;
context.type = p_type;
context.current_class = current_class;
context.current_function = current_function;
context.current_suite = current_suite;
context.current_line = tokenizer->get_cursor_line();
context.current_argument = p_argument;
context.node = p_node;
context.parser = this;
completion_context = context;
}
void GDScriptParser::make_completion_context(CompletionType p_type, Node *p_node, int p_argument, bool p_force) {
if (!for_completion || (!p_force && completion_context.type != COMPLETION_NONE)) {
return;
}
if (previous.cursor_place != GDScriptTokenizerText::CURSOR_MIDDLE && previous.cursor_place != GDScriptTokenizerText::CURSOR_END && current.cursor_place == GDScriptTokenizerText::CURSOR_NONE) {
return;
}
CompletionContext context;
context.type = p_type;
context.current_class = current_class;
context.current_function = current_function;
context.current_suite = current_suite;
context.current_line = tokenizer->get_cursor_line();
context.current_argument = p_argument;
context.node = p_node;
context.parser = this;
completion_context = context;
}
void GDScriptParser::make_completion_context(CompletionType p_type, Variant::Type p_builtin_type, bool p_force) {
if (!for_completion || (!p_force && completion_context.type != COMPLETION_NONE)) {
return;
}
if (previous.cursor_place != GDScriptTokenizerText::CURSOR_MIDDLE && previous.cursor_place != GDScriptTokenizerText::CURSOR_END && current.cursor_place == GDScriptTokenizerText::CURSOR_NONE) {
return;
}
CompletionContext context;
context.type = p_type;
context.current_class = current_class;
context.current_function = current_function;
context.current_suite = current_suite;
context.current_line = tokenizer->get_cursor_line();
context.builtin_type = p_builtin_type;
context.parser = this;
completion_context = context;
}
void GDScriptParser::push_completion_call(Node *p_call) {
if (!for_completion) {
return;
}
CompletionCall call;
call.call = p_call;
call.argument = 0;
completion_call_stack.push_back(call);
if (previous.cursor_place == GDScriptTokenizerText::CURSOR_MIDDLE || previous.cursor_place == GDScriptTokenizerText::CURSOR_END || current.cursor_place == GDScriptTokenizerText::CURSOR_BEGINNING) {
completion_call = call;
}
}
void GDScriptParser::pop_completion_call() {
if (!for_completion) {
return;
}
ERR_FAIL_COND_MSG(completion_call_stack.is_empty(), "Trying to pop empty completion call stack");
completion_call_stack.pop_back();
}
void GDScriptParser::set_last_completion_call_arg(int p_argument) {
if (!for_completion || passed_cursor) {
return;
}
ERR_FAIL_COND_MSG(completion_call_stack.is_empty(), "Trying to set argument on empty completion call stack");
completion_call_stack.back()->get().argument = p_argument;
}
Error GDScriptParser::parse(const String &p_source_code, const String &p_script_path, bool p_for_completion, bool p_parse_body) {
clear();
String source = p_source_code;
int cursor_line = -1;
int cursor_column = -1;
for_completion = p_for_completion;
parse_body = p_parse_body;
int tab_size = 4;
#ifdef TOOLS_ENABLED
if (EditorSettings::get_singleton()) {
tab_size = EditorSettings::get_singleton()->get_setting("text_editor/behavior/indent/size");
}
#endif // TOOLS_ENABLED
if (p_for_completion) {
// Remove cursor sentinel char.
const Vector<String> lines = p_source_code.split("\n");
cursor_line = 1;
cursor_column = 1;
for (int i = 0; i < lines.size(); i++) {
bool found = false;
const String &line = lines[i];
for (int j = 0; j < line.size(); j++) {
if (line[j] == char32_t(0xFFFF)) {
found = true;
break;
} else if (line[j] == '\t') {
cursor_column += tab_size - 1;
}
cursor_column++;
}
if (found) {
break;
}
cursor_line++;
cursor_column = 1;
}
source = source.replace_first(String::chr(0xFFFF), String());
}
GDScriptTokenizerText *text_tokenizer = memnew(GDScriptTokenizerText);
text_tokenizer->set_source_code(source);
tokenizer = text_tokenizer;
tokenizer->set_cursor_position(cursor_line, cursor_column);
script_path = p_script_path.simplify_path();
current = tokenizer->scan();
// Avoid error or newline as the first token.
// The latter can mess with the parser when opening files filled exclusively with comments and newlines.
while (current.type == GDScriptTokenizer::Token::ERROR || current.type == GDScriptTokenizer::Token::NEWLINE) {
if (current.type == GDScriptTokenizer::Token::ERROR) {
push_error(current.literal);
}
current = tokenizer->scan();
}
#ifdef DEBUG_ENABLED
// Warn about parsing an empty script file:
if (current.type == GDScriptTokenizer::Token::TK_EOF) {
// Create a dummy Node for the warning, pointing to the very beginning of the file
Node *nd = alloc_node<PassNode>();
nd->start_line = 1;
nd->start_column = 0;
nd->end_line = 1;
nd->leftmost_column = 0;
nd->rightmost_column = 0;
push_warning(nd, GDScriptWarning::EMPTY_FILE);
}
#endif
push_multiline(false); // Keep one for the whole parsing.
parse_program();
pop_multiline();
memdelete(text_tokenizer);
tokenizer = nullptr;
#ifdef DEBUG_ENABLED
if (multiline_stack.size() > 0) {
ERR_PRINT("Parser bug: Imbalanced multiline stack.");
}
#endif
if (errors.is_empty()) {
return OK;
} else {
return ERR_PARSE_ERROR;
}
}
Error GDScriptParser::parse_binary(const Vector<uint8_t> &p_binary, const String &p_script_path) {
GDScriptTokenizerBuffer *buffer_tokenizer = memnew(GDScriptTokenizerBuffer);
Error err = buffer_tokenizer->set_code_buffer(p_binary);
if (err) {
memdelete(buffer_tokenizer);
return err;
}
tokenizer = buffer_tokenizer;
script_path = p_script_path.simplify_path();
current = tokenizer->scan();
// Avoid error or newline as the first token.
// The latter can mess with the parser when opening files filled exclusively with comments and newlines.
while (current.type == GDScriptTokenizer::Token::ERROR || current.type == GDScriptTokenizer::Token::NEWLINE) {
if (current.type == GDScriptTokenizer::Token::ERROR) {
push_error(current.literal);
}
current = tokenizer->scan();
}
push_multiline(false); // Keep one for the whole parsing.
parse_program();
pop_multiline();
memdelete(buffer_tokenizer);
tokenizer = nullptr;
if (errors.is_empty()) {
return OK;
} else {
return ERR_PARSE_ERROR;
}
}
GDScriptTokenizer::Token GDScriptParser::advance() {
lambda_ended = false; // Empty marker since we're past the end in any case.
if (current.type == GDScriptTokenizer::Token::TK_EOF) {
ERR_FAIL_COND_V_MSG(current.type == GDScriptTokenizer::Token::TK_EOF, current, "GDScript parser bug: Trying to advance past the end of stream.");
}
if (for_completion && !completion_call_stack.is_empty()) {
if (completion_call.call == nullptr && tokenizer->is_past_cursor()) {
completion_call = completion_call_stack.back()->get();
passed_cursor = true;
}
}
previous = current;
current = tokenizer->scan();
while (current.type == GDScriptTokenizer::Token::ERROR) {
push_error(current.literal);
current = tokenizer->scan();
}
if (previous.type != GDScriptTokenizer::Token::DEDENT) { // `DEDENT` belongs to the next non-empty line.
for (Node *n : nodes_in_progress) {
update_extents(n);
}
}
return previous;
}
bool GDScriptParser::match(GDScriptTokenizer::Token::Type p_token_type) {
if (!check(p_token_type)) {
return false;
}
advance();
return true;
}
bool GDScriptParser::check(GDScriptTokenizer::Token::Type p_token_type) const {
if (p_token_type == GDScriptTokenizer::Token::IDENTIFIER) {
return current.is_identifier();
}
return current.type == p_token_type;
}
bool GDScriptParser::consume(GDScriptTokenizer::Token::Type p_token_type, const String &p_error_message) {
if (match(p_token_type)) {
return true;
}
push_error(p_error_message);
return false;
}
bool GDScriptParser::is_at_end() const {
return check(GDScriptTokenizer::Token::TK_EOF);
}
void GDScriptParser::synchronize() {
panic_mode = false;
while (!is_at_end()) {
if (previous.type == GDScriptTokenizer::Token::NEWLINE || previous.type == GDScriptTokenizer::Token::SEMICOLON) {
return;
}
switch (current.type) {
case GDScriptTokenizer::Token::CLASS:
case GDScriptTokenizer::Token::FUNC:
case GDScriptTokenizer::Token::STATIC:
case GDScriptTokenizer::Token::VAR:
case GDScriptTokenizer::Token::CONST:
case GDScriptTokenizer::Token::SIGNAL:
//case GDScriptTokenizer::Token::IF: // Can also be inside expressions.
case GDScriptTokenizer::Token::FOR:
case GDScriptTokenizer::Token::WHILE:
case GDScriptTokenizer::Token::MATCH:
case GDScriptTokenizer::Token::RETURN:
case GDScriptTokenizer::Token::ANNOTATION:
return;
default:
// Do nothing.
break;
}
advance();
}
}
void GDScriptParser::push_multiline(bool p_state) {
multiline_stack.push_back(p_state);
tokenizer->set_multiline_mode(p_state);
if (p_state) {
// Consume potential whitespace tokens already waiting in line.
while (current.type == GDScriptTokenizer::Token::NEWLINE || current.type == GDScriptTokenizer::Token::INDENT || current.type == GDScriptTokenizer::Token::DEDENT) {
current = tokenizer->scan(); // Don't call advance() here, as we don't want to change the previous token.
}
}
}
void GDScriptParser::pop_multiline() {
ERR_FAIL_COND_MSG(multiline_stack.is_empty(), "Parser bug: trying to pop from multiline stack without available value.");
multiline_stack.pop_back();
tokenizer->set_multiline_mode(multiline_stack.size() > 0 ? multiline_stack.back()->get() : false);
}
bool GDScriptParser::is_statement_end_token() const {
return check(GDScriptTokenizer::Token::NEWLINE) || check(GDScriptTokenizer::Token::SEMICOLON) || check(GDScriptTokenizer::Token::TK_EOF);
}
bool GDScriptParser::is_statement_end() const {
return lambda_ended || in_lambda || is_statement_end_token();
}
void GDScriptParser::end_statement(const String &p_context) {
bool found = false;
while (is_statement_end() && !is_at_end()) {
// Remove sequential newlines/semicolons.
if (is_statement_end_token()) {
// Only consume if this is an actual token.
advance();
} else if (lambda_ended) {
lambda_ended = false; // Consume this "token".
found = true;
break;
} else {
if (!found) {
lambda_ended = true; // Mark the lambda as done since we found something else to end the statement.
found = true;
}
break;
}
found = true;
}
if (!found && !is_at_end()) {
push_error(vformat(R"(Expected end of statement after %s, found "%s" instead.)", p_context, current.get_name()));
}
}
void GDScriptParser::parse_program() {
head = alloc_node<ClassNode>();
head->start_line = 1;
head->end_line = 1;
head->fqcn = GDScript::canonicalize_path(script_path);
current_class = head;
bool can_have_class_or_extends = true;
#define PUSH_PENDING_ANNOTATIONS_TO_HEAD \
if (!annotation_stack.is_empty()) { \
for (AnnotationNode * annot : annotation_stack) { \
head->annotations.push_back(annot); \
} \
annotation_stack.clear(); \
}
while (!check(GDScriptTokenizer::Token::TK_EOF)) {
if (match(GDScriptTokenizer::Token::ANNOTATION)) {
AnnotationNode *annotation = parse_annotation(AnnotationInfo::SCRIPT | AnnotationInfo::CLASS_LEVEL | AnnotationInfo::STANDALONE);
if (annotation != nullptr) {
if (annotation->applies_to(AnnotationInfo::CLASS)) {
// We do not know in advance what the annotation will be applied to: the `head` class or the subsequent inner class.
// If we encounter `class_name`, `extends` or pure `SCRIPT` annotation, then it's `head`, otherwise it's an inner class.
annotation_stack.push_back(annotation);
} else if (annotation->applies_to(AnnotationInfo::SCRIPT)) {
PUSH_PENDING_ANNOTATIONS_TO_HEAD;
if (annotation->name == SNAME("@tool") || annotation->name == SNAME("@icon")) {
// Some annotations need to be resolved in the parser.
annotation->apply(this, head, nullptr); // `head->outer == nullptr`.
} else {
head->annotations.push_back(annotation);
}
} else if (annotation->applies_to(AnnotationInfo::STANDALONE)) {
if (previous.type != GDScriptTokenizer::Token::NEWLINE) {
push_error(R"(Expected newline after a standalone annotation.)");
}
if (annotation->name == SNAME("@export_category") || annotation->name == SNAME("@export_group") || annotation->name == SNAME("@export_subgroup")) {
head->add_member_group(annotation);
// This annotation must appear after script-level annotations and `class_name`/`extends`,
// so we stop looking for script-level stuff.
can_have_class_or_extends = false;
break;
} else {
// For potential non-group standalone annotations.
push_error(R"(Unexpected standalone annotation.)");
}
} else {
annotation_stack.push_back(annotation);
// This annotation must appear after script-level annotations and `class_name`/`extends`,
// so we stop looking for script-level stuff.
can_have_class_or_extends = false;
break;
}
}
} else if (check(GDScriptTokenizer::Token::LITERAL) && current.literal.get_type() == Variant::STRING) {
// Allow strings in class body as multiline comments.
advance();
if (!match(GDScriptTokenizer::Token::NEWLINE)) {
push_error("Expected newline after comment string.");
}
} else {
break;
}
}
while (can_have_class_or_extends) {
// Order here doesn't matter, but there should be only one of each at most.
switch (current.type) {
case GDScriptTokenizer::Token::CLASS_NAME:
PUSH_PENDING_ANNOTATIONS_TO_HEAD;
if (head->start_line == 1) {
reset_extents(head, current);
}
advance();
if (head->identifier != nullptr) {
push_error(R"("class_name" can only be used once.)");
} else {
parse_class_name();
}
break;
case GDScriptTokenizer::Token::EXTENDS:
PUSH_PENDING_ANNOTATIONS_TO_HEAD;
if (head->start_line == 1) {
reset_extents(head, current);
}
advance();
if (head->extends_used) {
push_error(R"("extends" can only be used once.)");
} else {
parse_extends();
end_statement("superclass");
}
break;
case GDScriptTokenizer::Token::TK_EOF:
PUSH_PENDING_ANNOTATIONS_TO_HEAD;
can_have_class_or_extends = false;
break;
case GDScriptTokenizer::Token::LITERAL:
if (current.literal.get_type() == Variant::STRING) {
// Allow strings in class body as multiline comments.
advance();
if (!match(GDScriptTokenizer::Token::NEWLINE)) {
push_error("Expected newline after comment string.");
}
break;
}
[[fallthrough]];
default:
// No tokens are allowed between script annotations and class/extends.
can_have_class_or_extends = false;
break;
}
if (panic_mode) {
synchronize();
}
}
// When the only thing needed is the class name and the icon, we don't need to parse the hole file.
// It really speed up the call to GDScriptLanguage::get_global_class_name especially for large script.
if (!parse_body) {
return;
}
#undef PUSH_PENDING_ANNOTATIONS_TO_HEAD
parse_class_body(true);
complete_extents(head);
#ifdef TOOLS_ENABLED
const HashMap<int, GDScriptTokenizer::CommentData> &comments = tokenizer->get_comments();
int line = MIN(max_script_doc_line, head->end_line);
while (line > 0) {
if (comments.has(line) && comments[line].new_line && comments[line].comment.begins_with("##")) {
head->doc_data = parse_class_doc_comment(line);
break;
}
line--;
}
#endif // TOOLS_ENABLED
if (!check(GDScriptTokenizer::Token::TK_EOF)) {
push_error("Expected end of file.");
}
clear_unused_annotations();
}
Ref<GDScriptParserRef> GDScriptParser::get_depended_parser_for(const String &p_path) {
Ref<GDScriptParserRef> ref;
if (depended_parsers.has(p_path)) {
ref = depended_parsers[p_path];
} else {
Error err = OK;
ref = GDScriptCache::get_parser(p_path, GDScriptParserRef::EMPTY, err, script_path);
if (ref.is_valid()) {
depended_parsers[p_path] = ref;
}
}
return ref;
}
const HashMap<String, Ref<GDScriptParserRef>> &GDScriptParser::get_depended_parsers() {
return depended_parsers;
}
GDScriptParser::ClassNode *GDScriptParser::find_class(const String &p_qualified_name) const {
String first = p_qualified_name.get_slice("::", 0);
Vector<String> class_names;
GDScriptParser::ClassNode *result = nullptr;
// Empty initial name means start at the head.
if (first.is_empty() || (head->identifier && first == head->identifier->name)) {
class_names = p_qualified_name.split("::");
result = head;
} else if (p_qualified_name.begins_with(script_path)) {
// Script path could have a class path separator("::") in it.
class_names = p_qualified_name.trim_prefix(script_path).split("::");
result = head;
} else if (head->has_member(first)) {
class_names = p_qualified_name.split("::");
GDScriptParser::ClassNode::Member member = head->get_member(first);
if (member.type == GDScriptParser::ClassNode::Member::CLASS) {
result = member.m_class;
}
}
// Starts at index 1 because index 0 was handled above.
for (int i = 1; result != nullptr && i < class_names.size(); i++) {
const String ¤t_name = class_names[i];
GDScriptParser::ClassNode *next = nullptr;
if (result->has_member(current_name)) {
GDScriptParser::ClassNode::Member member = result->get_member(current_name);
if (member.type == GDScriptParser::ClassNode::Member::CLASS) {
next = member.m_class;
}
}
result = next;
}
return result;
}
bool GDScriptParser::has_class(const GDScriptParser::ClassNode *p_class) const {
if (head->fqcn.is_empty() && p_class->fqcn.get_slice("::", 0).is_empty()) {
return p_class == head;
} else if (p_class->fqcn.begins_with(head->fqcn)) {
return find_class(p_class->fqcn.trim_prefix(head->fqcn)) == p_class;
}
return false;
}
GDScriptParser::ClassNode *GDScriptParser::parse_class(bool p_is_static) {
ClassNode *n_class = alloc_node<ClassNode>();
ClassNode *previous_class = current_class;
current_class = n_class;
n_class->outer = previous_class;
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifier for the class name after "class".)")) {
n_class->identifier = parse_identifier();
if (n_class->outer) {
String fqcn = n_class->outer->fqcn;
if (fqcn.is_empty()) {
fqcn = GDScript::canonicalize_path(script_path);
}
n_class->fqcn = fqcn + "::" + n_class->identifier->name;
} else {
n_class->fqcn = n_class->identifier->name;
}
}
if (match(GDScriptTokenizer::Token::EXTENDS)) {
parse_extends();
}
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after class declaration.)");
bool multiline = match(GDScriptTokenizer::Token::NEWLINE);
if (multiline && !consume(GDScriptTokenizer::Token::INDENT, R"(Expected indented block after class declaration.)")) {
current_class = previous_class;
complete_extents(n_class);
return n_class;
}
if (match(GDScriptTokenizer::Token::EXTENDS)) {
if (n_class->extends_used) {
push_error(R"(Cannot use "extends" more than once in the same class.)");
}
parse_extends();
end_statement("superclass");
}
parse_class_body(multiline);
complete_extents(n_class);
if (multiline) {
consume(GDScriptTokenizer::Token::DEDENT, R"(Missing unindent at the end of the class body.)");
}
current_class = previous_class;
return n_class;
}
void GDScriptParser::parse_class_name() {
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifier for the global class name after "class_name".)")) {
current_class->identifier = parse_identifier();
current_class->fqcn = String(current_class->identifier->name);
}
if (match(GDScriptTokenizer::Token::EXTENDS)) {
// Allow extends on the same line.
parse_extends();
end_statement("superclass");
} else {
end_statement("class_name statement");
}
}
void GDScriptParser::parse_extends() {
current_class->extends_used = true;
int chain_index = 0;
if (match(GDScriptTokenizer::Token::LITERAL)) {
if (previous.literal.get_type() != Variant::STRING) {
push_error(vformat(R"(Only strings or identifiers can be used after "extends", found "%s" instead.)", Variant::get_type_name(previous.literal.get_type())));
}
current_class->extends_path = previous.literal;
if (!match(GDScriptTokenizer::Token::PERIOD)) {
return;
}
}
make_completion_context(COMPLETION_INHERIT_TYPE, current_class, chain_index++);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected superclass name after "extends".)")) {
return;
}
current_class->extends.push_back(parse_identifier());
while (match(GDScriptTokenizer::Token::PERIOD)) {
make_completion_context(COMPLETION_INHERIT_TYPE, current_class, chain_index++);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected superclass name after ".".)")) {
return;
}
current_class->extends.push_back(parse_identifier());
}
}
template <typename T>
void GDScriptParser::parse_class_member(T *(GDScriptParser::*p_parse_function)(bool), AnnotationInfo::TargetKind p_target, const String &p_member_kind, bool p_is_static) {
advance();
// Consume annotations.
List<AnnotationNode *> annotations;
while (!annotation_stack.is_empty()) {
AnnotationNode *last_annotation = annotation_stack.back()->get();
if (last_annotation->applies_to(p_target)) {
annotations.push_front(last_annotation);
annotation_stack.pop_back();
} else {
push_error(vformat(R"(Annotation "%s" cannot be applied to a %s.)", last_annotation->name, p_member_kind));
clear_unused_annotations();
}
}
T *member = (this->*p_parse_function)(p_is_static);
if (member == nullptr) {
return;
}
#ifdef TOOLS_ENABLED
int doc_comment_line = member->start_line - 1;
#endif // TOOLS_ENABLED
for (AnnotationNode *&annotation : annotations) {
member->annotations.push_back(annotation);
#ifdef TOOLS_ENABLED
if (annotation->start_line <= doc_comment_line) {
doc_comment_line = annotation->start_line - 1;
}
#endif // TOOLS_ENABLED
}
#ifdef TOOLS_ENABLED
if constexpr (std::is_same_v<T, ClassNode>) {
if (has_comment(member->start_line, true)) {
// Inline doc comment.
member->doc_data = parse_class_doc_comment(member->start_line, true);
} else if (has_comment(doc_comment_line, true) && tokenizer->get_comments()[doc_comment_line].new_line) {
// Normal doc comment. Don't check `min_member_doc_line` because a class ends parsing after its members.
// This may not work correctly for cases like `var a; class B`, but it doesn't matter in practice.
member->doc_data = parse_class_doc_comment(doc_comment_line);
}
} else {
if (has_comment(member->start_line, true)) {
// Inline doc comment.
member->doc_data = parse_doc_comment(member->start_line, true);
} else if (doc_comment_line >= min_member_doc_line && has_comment(doc_comment_line, true) && tokenizer->get_comments()[doc_comment_line].new_line) {
// Normal doc comment.
member->doc_data = parse_doc_comment(doc_comment_line);
}
}
min_member_doc_line = member->end_line + 1; // Prevent multiple members from using the same doc comment.
#endif // TOOLS_ENABLED
if (member->identifier != nullptr) {
if (!((String)member->identifier->name).is_empty()) { // Enums may be unnamed.
if (current_class->members_indices.has(member->identifier->name)) {
push_error(vformat(R"(%s "%s" has the same name as a previously declared %s.)", p_member_kind.capitalize(), member->identifier->name, current_class->get_member(member->identifier->name).get_type_name()), member->identifier);
} else {
current_class->add_member(member);
}
} else {
current_class->add_member(member);
}
}
}
void GDScriptParser::parse_class_body(bool p_is_multiline) {
bool class_end = false;
bool next_is_static = false;
while (!class_end && !is_at_end()) {
GDScriptTokenizer::Token token = current;
switch (token.type) {
case GDScriptTokenizer::Token::VAR:
parse_class_member(&GDScriptParser::parse_variable, AnnotationInfo::VARIABLE, "variable", next_is_static);
if (next_is_static) {
current_class->has_static_data = true;
}
break;
case GDScriptTokenizer::Token::CONST:
parse_class_member(&GDScriptParser::parse_constant, AnnotationInfo::CONSTANT, "constant");
break;
case GDScriptTokenizer::Token::SIGNAL:
parse_class_member(&GDScriptParser::parse_signal, AnnotationInfo::SIGNAL, "signal");
break;