Add built-in GDScript keywords to the class reference

core/doc_data.h

@@ -712,6 +712,7 @@ class DocData {
 		Vector<ConstantDoc> constants;
 		HashMap<String, EnumDoc> enums;
 		Vector<PropertyDoc> properties;
+		Vector<MethodDoc> builtins;
 		Vector<MethodDoc> annotations;
 		Vector<ThemeItemDoc> theme_properties;
 		bool is_deprecated = false;
@@ -810,6 +811,14 @@ class DocData {
 				doc.properties.push_back(PropertyDoc::from_dict(properties[i]));
 			}
 
+			Array builtins;
+			if (p_dict.has("builtins")) {
+				builtins = p_dict["builtins"];
+			}
+			for (int i = 0; i < builtins.size(); i++) {
+				doc.builtins.push_back(MethodDoc::from_dict(builtins[i]));
+			}
+
 			Array annotations;
 			if (p_dict.has("annotations")) {
 				annotations = p_dict["annotations"];
@@ -939,6 +948,14 @@ class DocData {
 				dict["properties"] = properties;
 			}
 
+			if (!p_doc.builtins.is_empty()) {
+				Array builtins;
+				for (int i = 0; i < p_doc.builtins.size(); i++) {
+					builtins.push_back(MethodDoc::to_dict(p_doc.builtins[i]));
+				}
+				dict["builtins"] = builtins;
+			}
+
 			if (!p_doc.annotations.is_empty()) {
 				Array annotations;
 				for (int i = 0; i < p_doc.annotations.size(); i++) {

core/object/script_language.h

@@ -346,6 +346,7 @@ class ScriptLanguage : public Object {
 		LOOKUP_RESULT_CLASS_ENUM,
 		LOOKUP_RESULT_CLASS_TBD_GLOBALSCOPE,
 		LOOKUP_RESULT_CLASS_ANNOTATION,
+		LOOKUP_RESULT_CLASS_BUILTIN,
 		LOOKUP_RESULT_MAX
 	};
 
@@ -397,6 +398,7 @@ class ScriptLanguage : public Object {
 	/* LOADER FUNCTIONS */
 
 	virtual void get_recognized_extensions(List<String> *p_extensions) const = 0;
+	virtual void get_public_keywords(List<MethodInfo> *p_keywords) const = 0;
 	virtual void get_public_functions(List<MethodInfo> *p_functions) const = 0;
 	virtual void get_public_constants(List<Pair<String, Variant>> *p_constants) const = 0;
 	virtual void get_public_annotations(List<MethodInfo> *p_annotations) const = 0;

core/object/script_language_extension.cpp

@@ -146,6 +146,7 @@ void ScriptLanguageExtension::_bind_methods() {
 	GDVIRTUAL_BIND(_reload_tool_script, "script", "soft_reload");
 
 	GDVIRTUAL_BIND(_get_recognized_extensions);
+	GDVIRTUAL_BIND(_get_public_keywords);
 	GDVIRTUAL_BIND(_get_public_functions);
 	GDVIRTUAL_BIND(_get_public_constants);
 	GDVIRTUAL_BIND(_get_public_annotations);
@@ -171,6 +172,7 @@ void ScriptLanguageExtension::_bind_methods() {
 	BIND_ENUM_CONSTANT(LOOKUP_RESULT_CLASS_ENUM);
 	BIND_ENUM_CONSTANT(LOOKUP_RESULT_CLASS_TBD_GLOBALSCOPE);
 	BIND_ENUM_CONSTANT(LOOKUP_RESULT_CLASS_ANNOTATION);
+	BIND_ENUM_CONSTANT(LOOKUP_RESULT_CLASS_BUILTIN);
 	BIND_ENUM_CONSTANT(LOOKUP_RESULT_MAX);
 
 	BIND_ENUM_CONSTANT(LOCATION_LOCAL);

core/object/script_language_extension.h

@@ -600,6 +600,16 @@ class ScriptLanguageExtension : public ScriptLanguage {
 		}
 	}
 
+	GDVIRTUAL0RC(TypedArray<Dictionary>, _get_public_keywords)
+	virtual void get_public_keywords(List<MethodInfo> *p_keywords) const override {
+		TypedArray<Dictionary> ret;
+		GDVIRTUAL_REQUIRED_CALL(_get_public_keywords, ret);
+		for (const Variant &var : ret) {
+			MethodInfo mi = MethodInfo::from_dict(var);
+			p_keywords->push_back(mi);
+		}
+	}
+
 	GDVIRTUAL0RC(TypedArray<Dictionary>, _get_public_functions)
 	virtual void get_public_functions(List<MethodInfo> *p_functions) const override {
 		TypedArray<Dictionary> ret;

doc/class.xsd

@@ -196,6 +196,34 @@
 						</xs:sequence>
 					</xs:complexType>
 				</xs:element>
+				<xs:element name="builtins" minOccurs="0">
+					<xs:complexType>
+						<xs:sequence>
+							<xs:element name="builtin" maxOccurs="unbounded" minOccurs="0">
+								<xs:complexType>
+									<xs:sequence>
+										<xs:element name="param" maxOccurs="unbounded" minOccurs="0">
+											<xs:complexType>
+												<xs:sequence>
+													<xs:sequence />
+												</xs:sequence>
+												<xs:attribute type="xs:byte" name="index" />
+												<xs:attribute type="xs:string" name="name" />
+												<xs:attribute type="xs:string" name="type" />
+												<xs:attribute type="xs:string" name="enum" use="optional" />
+												<xs:attribute type="xs:boolean" name="is_bitfield" use="optional" />
+												<xs:attribute type="xs:string" name="default" use="optional" />
+											</xs:complexType>
+										</xs:element>
+										<xs:element type="xs:string" name="description" />
+									</xs:sequence>
+									<xs:attribute type="xs:string" name="name" use="optional" />
+									<xs:attribute type="xs:string" name="keywords" use="optional" />
+								</xs:complexType>
+							</xs:element>
+						</xs:sequence>
+					</xs:complexType>
+				</xs:element>
 				<xs:element name="annotations" minOccurs="0">
 					<xs:complexType>
 						<xs:sequence>

doc/classes/ScriptEditor.xml

@@ -60,6 +60,8 @@
 				class_signal:BaseButton:pressed
 				# Shows help for the CanvasItem property visible.
 				class_property:CanvasItem:visible
+				# Shows help for the GDScript built-in keyword.
+				class_builtin:@GDScript:for
 				# Shows help for the GDScript annotation export.
 				# Annotations should be prefixed with the `@` symbol in the descriptor, as shown here.
 				class_annotation:@GDScript:@export

doc/classes/ScriptLanguageExtension.xml

@@ -189,6 +189,11 @@
 			<description>
 			</description>
 		</method>
+		<method name="_get_public_keywords" qualifiers="virtual const">
+			<return type="Dictionary[]" />
+			<description>
+			</description>
+		</method>
 		<method name="_get_recognized_extensions" qualifiers="virtual const">
 			<return type="PackedStringArray" />
 			<description>
@@ -391,7 +396,9 @@
 		</constant>
 		<constant name="LOOKUP_RESULT_CLASS_ANNOTATION" value="8" enum="LookupResultType">
 		</constant>
-		<constant name="LOOKUP_RESULT_MAX" value="9" enum="LookupResultType">
+		<constant name="LOOKUP_RESULT_CLASS_BUILTIN" value="9" enum="LookupResultType">
+		</constant>
+		<constant name="LOOKUP_RESULT_MAX" value="10" enum="LookupResultType">
 		</constant>
 		<constant name="LOCATION_LOCAL" value="0" enum="CodeCompletionLocation">
 			The option is local to the location of the code completion query - e.g. a local variable. Subsequent value of location represent options from the outer class, the exact value represent how far they are (in terms of inner classes).

doc/tools/make_rst.py

@@ -45,6 +45,7 @@
     "Signals",
     "Enumerations",
     "Constants",
+    "Built-ins",
     "Annotations",
     "Property Descriptions",
     "Constructor Descriptions",
@@ -603,6 +604,7 @@ def __init__(self, name: str) -> None:
         self.methods: OrderedDict[str, List[MethodDef]] = OrderedDict()
         self.operators: OrderedDict[str, List[MethodDef]] = OrderedDict()
         self.signals: OrderedDict[str, SignalDef] = OrderedDict()
+        self.builtins: OrderedDict[str, List[AnnotationDef]] = OrderedDict()
         self.annotations: OrderedDict[str, List[AnnotationDef]] = OrderedDict()
         self.theme_items: OrderedDict[str, ThemeItemDef] = OrderedDict()
         self.inherits: Optional[str] = None
@@ -1219,6 +1221,46 @@ def make_rst_class(class_def: ClassDef, state: State, dry_run: bool, output_dir:
 
                 f.write("\n\n")
 
+        # Built-in keyword descriptions
+        if len(class_def.builtins) > 0:
+            f.write(make_separator(True))
+            f.write(make_heading("Built-in keywords", "-"))
+
+            index = 0
+
+            for method_list in class_def.builtins.values():  # type: ignore
+                for i, m in enumerate(method_list):
+                    if index != 0:
+                        f.write(make_separator())
+
+                    # Create builtin signature and anchor point.
+
+                    self_link = ""
+                    if i == 0:
+                        builtin_anchor = f"class_{class_name}_builtin_{m.name}"
+                        f.write(f".. _{builtin_anchor}:\n\n")
+                        self_link = f" :ref:`🔗<{builtin_anchor}>`"
+
+                    f.write(".. rst-class:: classref-builtin\n\n")
+
+                    _, signature = make_method_signature(class_def, m, "", state)
+                    f.write(f"{signature}{self_link}\n\n")
+
+                    # Add builtin description, or a call to action if it's missing.
+
+                    if m.description is not None and m.description.strip() != "":
+                        f.write(f"{format_text_block(m.description.strip(), m, state)}\n\n")
+                    else:
+                        f.write(".. container:: contribute\n\n\t")
+                        f.write(
+                            translate(
+                                "There is currently no description for this built-in keyword. Please help us by :ref:`contributing one <doc_updating_the_class_reference>`!"
+                            )
+                            + "\n\n"
+                        )
+
+                    index += 1
+
         # Annotation descriptions
         if len(class_def.annotations) > 0:
             f.write(make_separator(True))

editor/doc_tools.cpp

@@ -341,6 +341,8 @@ void DocTools::merge_from(const DocTools &p_data) {
 
 		merge_constants(c.constants, cf.constants);
 
+		merge_methods(c.builtins, cf.builtins);
+
 		merge_methods(c.annotations, cf.annotations);
 
 		merge_properties(c.properties, cf.properties);
@@ -1009,7 +1011,7 @@ void DocTools::generate(BitField<GenerateFlags> p_flags) {
 	// Add scripting language built-ins.
 	{
 		// We only add a doc entry for languages which actually define any built-in
-		// methods, constants, or annotations.
+		// keywords (builtins), methods, constants, or annotations.
 		for (int i = 0; i < ScriptServer::get_language_count(); i++) {
 			ScriptLanguage *lang = ScriptServer::get_language(i);
 			String cname = "@" + lang->get_name();
@@ -1063,6 +1065,39 @@ void DocTools::generate(BitField<GenerateFlags> p_flags) {
 				c.constants.push_back(cd);
 			}
 
+			// Get keywords.
+			List<MethodInfo> binfo;
+			lang->get_public_keywords(&binfo);
+
+			for (const MethodInfo &bi : binfo) {
+				DocData::MethodDoc btd;
+				btd.name = bi.name;
+
+				if (bi.flags & METHOD_FLAG_VARARG) {
+					if (!btd.qualifiers.is_empty()) {
+						btd.qualifiers += " ";
+					}
+					btd.qualifiers += "vararg";
+				}
+
+				DocData::return_doc_from_retinfo(btd, bi.return_val);
+
+				int j = 0;
+				for (List<PropertyInfo>::ConstIterator itr = bi.arguments.begin(); itr != bi.arguments.end(); ++itr, ++j) {
+					DocData::ArgumentDoc ad;
+					DocData::argument_doc_from_arginfo(ad, *itr);
+
+					int darg_idx = j - (bi.arguments.size() - bi.default_arguments.size());
+					if (darg_idx >= 0) {
+						ad.default_value = DocData::get_default_value_string(bi.default_arguments[darg_idx]);
+					}
+
+					btd.arguments.push_back(ad);
+				}
+
+				c.builtins.push_back(btd);
+			}
+
 			// Get annotations.
 			List<MethodInfo> ainfo;
 			lang->get_public_annotations(&ainfo);
@@ -1097,11 +1132,12 @@ void DocTools::generate(BitField<GenerateFlags> p_flags) {
 			}
 
 			// Skip adding the lang if it doesn't expose anything (e.g. C#).
-			if (c.methods.is_empty() && c.constants.is_empty() && c.annotations.is_empty()) {
+			if (c.methods.is_empty() && c.constants.is_empty() && c.builtins.is_empty() && c.annotations.is_empty()) {
 				continue;
 			}
 
 			c.methods.sort_custom<MethodCompare>();
+			c.builtins.sort_custom<MethodCompare>();
 			c.annotations.sort_custom<MethodCompare>();
 
 			class_list[cname] = c;
@@ -1350,6 +1386,9 @@ Error DocTools::_load(Ref<XMLParser> parser) {
 				} else if (name2 == "signals") {
 					Error err2 = _parse_methods(parser, c.signals);
 					ERR_FAIL_COND_V(err2, err2);
+				} else if (name2 == "builtins") {
+					Error err2 = _parse_methods(parser, c.builtins);
+					ERR_FAIL_COND_V(err2, err2);
 				} else if (name2 == "annotations") {
 					Error err2 = _parse_methods(parser, c.annotations);
 					ERR_FAIL_COND_V(err2, err2);
@@ -1741,6 +1780,8 @@ Error DocTools::save_classes(const String &p_default_path, const HashMap<String,
 			_write_string(f, 1, "</constants>");
 		}
 
+		_write_method_doc(f, "builtin", c.builtins);
+
 		_write_method_doc(f, "annotation", c.annotations);
 
 		if (!c.theme_properties.is_empty()) {