ConfigFile: Improve error messages and complete docs

core/io/config_file.cpp

@@ -86,7 +86,8 @@ void ConfigFile::set_value(const String &p_section, const String &p_key, const V
 Variant ConfigFile::get_value(const String &p_section, const String &p_key, Variant p_default) const {
 
 	if (!values.has(p_section) || !values[p_section].has(p_key)) {
-		ERR_FAIL_COND_V_MSG(p_default.get_type() == Variant::NIL, Variant(), "Couldn't find the given section '" + p_section + "', key '" + p_key + "' and no default was given.");
+		ERR_FAIL_COND_V_MSG(p_default.get_type() == Variant::NIL, Variant(),
+				vformat("Couldn't find the given section \"%s\" and key \"%s\", and no default was given.", p_section, p_key));
 		return p_default;
 	}
 
@@ -112,7 +113,7 @@ void ConfigFile::get_sections(List<String> *r_sections) const {
 }
 void ConfigFile::get_section_keys(const String &p_section, List<String> *r_keys) const {
 
-	ERR_FAIL_COND_MSG(!values.has(p_section), "Cannont get keys from nonexistent section '" + p_section + "'.");
+	ERR_FAIL_COND_MSG(!values.has(p_section), vformat("Cannot get keys from nonexistent section \"%s\".", p_section));
 
 	for (OrderedHashMap<String, Variant>::ConstElement E = values[p_section].front(); E; E = E.next()) {
 		r_keys->push_back(E.key());
@@ -121,12 +122,14 @@ void ConfigFile::get_section_keys(const String &p_section, List<String> *r_keys)
 
 void ConfigFile::erase_section(const String &p_section) {
 
+	ERR_FAIL_COND_MSG(!values.has(p_section), vformat("Cannot erase nonexistent section \"%s\".", p_section));
 	values.erase(p_section);
 }
 
 void ConfigFile::erase_section_key(const String &p_section, const String &p_key) {
 
-	ERR_FAIL_COND_MSG(!values.has(p_section), "Cannot erase key from nonexistent section '" + p_section + "'.");
+	ERR_FAIL_COND_MSG(!values.has(p_section), vformat("Cannot erase key \"%s\" from nonexistent section \"%s\".", p_key, p_section));
+	ERR_FAIL_COND_MSG(!values[p_section].has(p_key), vformat("Cannot erase nonexistent key \"%s\" from section \"%s\".", p_key, p_section));
 
 	values[p_section].erase(p_key);
 }
@@ -291,7 +294,7 @@ Error ConfigFile::_parse(const String &p_path, VariantParser::Stream *p_stream)
 		if (err == ERR_FILE_EOF) {
 			return OK;
 		} else if (err != OK) {
-			ERR_PRINT("ConfgFile - " + p_path + ":" + itos(lines) + " error: " + error_text + ".");
+			ERR_PRINT(vformat("ConfigFile parse error at %s:%d: %s.", p_path, lines, error_text));
 			return err;
 		}
 
@@ -324,11 +327,8 @@ void ConfigFile::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("save", "path"), &ConfigFile::save);
 
 	ClassDB::bind_method(D_METHOD("load_encrypted", "path", "key"), &ConfigFile::load_encrypted);
-	ClassDB::bind_method(D_METHOD("load_encrypted_pass", "path", "pass"), &ConfigFile::load_encrypted_pass);
+	ClassDB::bind_method(D_METHOD("load_encrypted_pass", "path", "password"), &ConfigFile::load_encrypted_pass);
 
 	ClassDB::bind_method(D_METHOD("save_encrypted", "path", "key"), &ConfigFile::save_encrypted);
-	ClassDB::bind_method(D_METHOD("save_encrypted_pass", "path", "pass"), &ConfigFile::save_encrypted_pass);
-}
-
-ConfigFile::ConfigFile() {
+	ClassDB::bind_method(D_METHOD("save_encrypted_pass", "path", "password"), &ConfigFile::save_encrypted_pass);
 }

core/io/config_file.h

@@ -74,8 +74,6 @@ public:
 
 	Error save_encrypted(const String &p_path, const Vector<uint8_t> &p_key);
 	Error save_encrypted_pass(const String &p_path, const String &p_pass);
-
-	ConfigFile();
 };
 
 #endif // CONFIG_FILE_H

doc/classes/ConfigFile.xml

@@ -37,7 +37,7 @@
 			<argument index="0" name="section" type="String">
 			</argument>
 			<description>
-				Deletes the specified section along with all the key-value pairs inside.
+				Deletes the specified section along with all the key-value pairs inside. Raises an error if the section does not exist.
 			</description>
 		</method>
 		<method name="erase_section_key">
@@ -48,6 +48,7 @@
 			<argument index="1" name="key" type="String">
 			</argument>
 			<description>
+				Deletes the specified key in a section. Raises an error if either the section or the key do not exist.
 			</description>
 		</method>
 		<method name="get_section_keys" qualifiers="const">
@@ -56,7 +57,7 @@
 			<argument index="0" name="section" type="String">
 			</argument>
 			<description>
-				Returns an array of all defined key identifiers in the specified section.
+				Returns an array of all defined key identifiers in the specified section. Raises an error and returns an empty array if the section does not exist.
 			</description>
 		</method>
 		<method name="get_sections" qualifiers="const">
@@ -76,7 +77,7 @@
 			<argument index="2" name="default" type="Variant" default="null">
 			</argument>
 			<description>
-				Returns the current value for the specified section and key. If the section and/or the key do not exist, the method returns the value of the optional [code]default[/code] argument, or [code]null[/code] if it is omitted.
+				Returns the current value for the specified section and key. If either the section or the key do not exist, the method returns the fallback [code]default[/code] value. If [code]default[/code] is not specified or set to [code]null[/code], an error is also raised.
 			</description>
 		</method>
 		<method name="has_section" qualifiers="const">
@@ -105,7 +106,7 @@
 			<argument index="0" name="path" type="String">
 			</argument>
 			<description>
-				Loads the config file specified as a parameter. The file's contents are parsed and loaded in the ConfigFile object which the method was called on.
+				Loads the config file specified as a parameter. The file's contents are parsed and loaded in the [ConfigFile] object which the method was called on.
 				Returns one of the [enum Error] code constants ([code]OK[/code] on success).
 			</description>
 		</method>
@@ -117,6 +118,8 @@
 			<argument index="1" name="key" type="PackedByteArray">
 			</argument>
 			<description>
+				Loads the encrypted config file specified as a parameter, using the provided [code]key[/code] to decrypt it. The file's contents are parsed and loaded in the [ConfigFile] object which the method was called on.
+				Returns one of the [enum Error] code constants ([code]OK[/code] on success).
 			</description>
 		</method>
 		<method name="load_encrypted_pass">
@@ -124,9 +127,11 @@
 			</return>
 			<argument index="0" name="path" type="String">
 			</argument>
-			<argument index="1" name="pass" type="String">
+			<argument index="1" name="password" type="String">
 			</argument>
 			<description>
+				Loads the encrypted config file specified as a parameter, using the provided [code]password[/code] to decrypt it. The file's contents are parsed and loaded in the [ConfigFile] object which the method was called on.
+				Returns one of the [enum Error] code constants ([code]OK[/code] on success).
 			</description>
 		</method>
 		<method name="parse">
@@ -145,7 +150,7 @@
 			<argument index="0" name="path" type="String">
 			</argument>
 			<description>
-				Saves the contents of the ConfigFile object to the file specified as a parameter. The output file uses an INI-style structure.
+				Saves the contents of the [ConfigFile] object to the file specified as a parameter. The output file uses an INI-style structure.
 				Returns one of the [enum Error] code constants ([code]OK[/code] on success).
 			</description>
 		</method>
@@ -157,6 +162,8 @@
 			<argument index="1" name="key" type="PackedByteArray">
 			</argument>
 			<description>
+				Saves the contents of the [ConfigFile] object to the AES-256 encrypted file specified as a parameter, using the provided [code]key[/code] to encrypt it. The output file uses an INI-style structure.
+				Returns one of the [enum Error] code constants ([code]OK[/code] on success).
 			</description>
 		</method>
 		<method name="save_encrypted_pass">
@@ -164,9 +171,11 @@
 			</return>
 			<argument index="0" name="path" type="String">
 			</argument>
-			<argument index="1" name="pass" type="String">
+			<argument index="1" name="password" type="String">
 			</argument>
 			<description>
+				Saves the contents of the [ConfigFile] object to the AES-256 encrypted file specified as a parameter, using the provided [code]password[/code] to encrypt it. The output file uses an INI-style structure.
+				Returns one of the [enum Error] code constants ([code]OK[/code] on success).
 			</description>
 		</method>
 		<method name="set_value">
@@ -179,7 +188,7 @@
 			<argument index="2" name="value" type="Variant">
 			</argument>
 			<description>
-				Assigns a value to the specified key of the specified section. If the section and/or the key do not exist, they are created. Passing a [code]null[/code] value deletes the specified key if it exists, and deletes the section if it ends up empty once the key has been removed.
+				Assigns a value to the specified key of the specified section. If either the section or the key do not exist, they are created. Passing a [code]null[/code] value deletes the specified key if it exists, and deletes the section if it ends up empty once the key has been removed.
 			</description>
 		</method>
 	</methods>