4abbb2d684
This happens too often with normal usage of the API. The warning can still be useful to find actual bugs where discarding the return value wasn't intentional, but this should stay enabled manually, at least until we either improve the API to remove false positives, or improve the warning (e.g. to only warn about unused return value on const functions).
248 lines
10 KiB
C++
248 lines
10 KiB
C++
/*************************************************************************/
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/* gdscript_warning.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "gdscript_warning.h"
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#include "core/variant/variant.h"
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#ifdef DEBUG_ENABLED
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String GDScriptWarning::get_message() const {
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#define CHECK_SYMBOLS(m_amount) ERR_FAIL_COND_V(symbols.size() < m_amount, String());
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switch (code) {
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case UNASSIGNED_VARIABLE_OP_ASSIGN: {
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CHECK_SYMBOLS(1);
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return "Using assignment with operation but the variable '" + symbols[0] + "' was not previously assigned a value.";
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} break;
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case UNASSIGNED_VARIABLE: {
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CHECK_SYMBOLS(1);
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return "The variable '" + symbols[0] + "' was used but never assigned a value.";
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} break;
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case UNUSED_VARIABLE: {
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CHECK_SYMBOLS(1);
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return "The local variable '" + symbols[0] + "' is declared but never used in the block. If this is intended, prefix it with an underscore: '_" + symbols[0] + "'";
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} break;
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case UNUSED_LOCAL_CONSTANT: {
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CHECK_SYMBOLS(1);
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return "The local constant '" + symbols[0] + "' is declared but never used in the block. If this is intended, prefix it with an underscore: '_" + symbols[0] + "'";
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} break;
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case SHADOWED_VARIABLE: {
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CHECK_SYMBOLS(4);
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return vformat(R"(The local %s "%s" is shadowing an already-declared %s at line %s.)", symbols[0], symbols[1], symbols[2], symbols[3]);
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} break;
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case SHADOWED_VARIABLE_BASE_CLASS: {
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CHECK_SYMBOLS(4);
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return vformat(R"(The local %s "%s" is shadowing an already-declared %s at the base class "%s".)", symbols[0], symbols[1], symbols[2], symbols[3]);
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} break;
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case UNUSED_PRIVATE_CLASS_VARIABLE: {
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CHECK_SYMBOLS(1);
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return "The class variable '" + symbols[0] + "' is declared but never used in the script.";
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} break;
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case UNUSED_PARAMETER: {
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CHECK_SYMBOLS(2);
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return "The parameter '" + symbols[1] + "' is never used in the function '" + symbols[0] + "'. If this is intended, prefix it with an underscore: '_" + symbols[1] + "'";
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} break;
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case UNREACHABLE_CODE: {
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CHECK_SYMBOLS(1);
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return "Unreachable code (statement after return) in function '" + symbols[0] + "()'.";
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} break;
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case UNREACHABLE_PATTERN: {
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return "Unreachable pattern (pattern after wildcard or bind).";
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} break;
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case STANDALONE_EXPRESSION: {
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return "Standalone expression (the line has no effect).";
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} break;
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case VOID_ASSIGNMENT: {
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CHECK_SYMBOLS(1);
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return "Assignment operation, but the function '" + symbols[0] + "()' returns void.";
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} break;
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case NARROWING_CONVERSION: {
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return "Narrowing conversion (float is converted to int and loses precision).";
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} break;
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case INCOMPATIBLE_TERNARY: {
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return "Values of the ternary conditional are not mutually compatible.";
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} break;
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case UNUSED_SIGNAL: {
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CHECK_SYMBOLS(1);
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return "The signal '" + symbols[0] + "' is declared but never emitted.";
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} break;
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case RETURN_VALUE_DISCARDED: {
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CHECK_SYMBOLS(1);
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return "The function '" + symbols[0] + "()' returns a value that will be discarded if not used.";
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} break;
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case PROPERTY_USED_AS_FUNCTION: {
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CHECK_SYMBOLS(2);
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return "The method '" + symbols[0] + "()' was not found in base '" + symbols[1] + "' but there's a property with the same name. Did you mean to access it?";
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} break;
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case CONSTANT_USED_AS_FUNCTION: {
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CHECK_SYMBOLS(2);
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return "The method '" + symbols[0] + "()' was not found in base '" + symbols[1] + "' but there's a constant with the same name. Did you mean to access it?";
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} break;
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case FUNCTION_USED_AS_PROPERTY: {
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CHECK_SYMBOLS(2);
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return "The property '" + symbols[0] + "' was not found in base '" + symbols[1] + "' but there's a method with the same name. Did you mean to call it?";
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} break;
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case INTEGER_DIVISION: {
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return "Integer division, decimal part will be discarded.";
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} break;
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case UNSAFE_PROPERTY_ACCESS: {
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CHECK_SYMBOLS(2);
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return "The property '" + symbols[0] + "' is not present on the inferred type '" + symbols[1] + "' (but may be present on a subtype).";
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} break;
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case UNSAFE_METHOD_ACCESS: {
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CHECK_SYMBOLS(2);
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return "The method '" + symbols[0] + "' is not present on the inferred type '" + symbols[1] + "' (but may be present on a subtype).";
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} break;
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case UNSAFE_CAST: {
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CHECK_SYMBOLS(1);
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return "The value is cast to '" + symbols[0] + "' but has an unknown type.";
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} break;
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case UNSAFE_CALL_ARGUMENT: {
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CHECK_SYMBOLS(4);
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return "The argument '" + symbols[0] + "' of the function '" + symbols[1] + "' requires a the subtype '" + symbols[2] + "' but the supertype '" + symbols[3] + "' was provided";
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} break;
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case DEPRECATED_KEYWORD: {
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CHECK_SYMBOLS(2);
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return "The '" + symbols[0] + "' keyword is deprecated and will be removed in a future release, please replace its uses by '" + symbols[1] + "'.";
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} break;
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case STANDALONE_TERNARY: {
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return "Standalone ternary conditional operator: the return value is being discarded.";
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}
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case ASSERT_ALWAYS_TRUE: {
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return "Assert statement is redundant because the expression is always true.";
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}
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case ASSERT_ALWAYS_FALSE: {
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return "Assert statement will raise an error because the expression is always false.";
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}
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case REDUNDANT_AWAIT: {
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return R"("await" keyword not needed in this case, because the expression isn't a coroutine nor a signal.)";
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}
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case EMPTY_FILE: {
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return "Empty script file.";
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}
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case SHADOWED_GLOBAL_IDENTIFIER: {
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CHECK_SYMBOLS(3);
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return vformat(R"(The %s '%s' has the same name as a %s.)", symbols[0], symbols[1], symbols[2]);
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}
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case INT_ASSIGNED_TO_ENUM: {
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return "Integer used when an enum value is expected. If this is intended cast the integer to the enum type.";
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}
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case STATIC_CALLED_ON_INSTANCE: {
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CHECK_SYMBOLS(2);
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return vformat(R"(The function '%s()' is a static function but was called from an instance. Instead, it should be directly called from the type: '%s.%s()'.)", symbols[0], symbols[1], symbols[0]);
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}
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case WARNING_MAX:
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break; // Can't happen, but silences warning
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}
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ERR_FAIL_V_MSG(String(), "Invalid GDScript warning code: " + get_name_from_code(code) + ".");
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#undef CHECK_SYMBOLS
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}
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int GDScriptWarning::get_default_value(Code p_code) {
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if (get_name_from_code(p_code).to_lower().begins_with("unsafe_")) {
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return WarnLevel::IGNORE;
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}
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// Too spammy by default on common cases (connect, Tween, etc.).
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if (p_code == RETURN_VALUE_DISCARDED) {
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return WarnLevel::IGNORE;
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}
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return WarnLevel::WARN;
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}
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PropertyInfo GDScriptWarning::get_property_info(Code p_code) {
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// Making this a separate function in case a warning needs different PropertyInfo in the future.
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return PropertyInfo(Variant::INT, get_settings_path_from_code(p_code), PROPERTY_HINT_ENUM, "Ignore,Warn,Error");
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}
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String GDScriptWarning::get_name() const {
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return get_name_from_code(code);
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}
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String GDScriptWarning::get_name_from_code(Code p_code) {
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ERR_FAIL_COND_V(p_code < 0 || p_code >= WARNING_MAX, String());
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static const char *names[] = {
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"UNASSIGNED_VARIABLE",
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"UNASSIGNED_VARIABLE_OP_ASSIGN",
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"UNUSED_VARIABLE",
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"UNUSED_LOCAL_CONSTANT",
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"SHADOWED_VARIABLE",
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"SHADOWED_VARIABLE_BASE_CLASS",
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"UNUSED_PRIVATE_CLASS_VARIABLE",
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"UNUSED_PARAMETER",
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"UNREACHABLE_CODE",
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"UNREACHABLE_PATTERN",
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"STANDALONE_EXPRESSION",
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"VOID_ASSIGNMENT",
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"NARROWING_CONVERSION",
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"INCOMPATIBLE_TERNARY",
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"UNUSED_SIGNAL",
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"RETURN_VALUE_DISCARDED",
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"PROPERTY_USED_AS_FUNCTION",
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"CONSTANT_USED_AS_FUNCTION",
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"FUNCTION_USED_AS_PROPERTY",
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"INTEGER_DIVISION",
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"UNSAFE_PROPERTY_ACCESS",
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"UNSAFE_METHOD_ACCESS",
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"UNSAFE_CAST",
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"UNSAFE_CALL_ARGUMENT",
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"DEPRECATED_KEYWORD",
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"STANDALONE_TERNARY",
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"ASSERT_ALWAYS_TRUE",
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"ASSERT_ALWAYS_FALSE",
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"REDUNDANT_AWAIT",
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"EMPTY_FILE",
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"SHADOWED_GLOBAL_IDENTIFIER",
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"INT_ASSIGNED_TO_ENUM",
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"STATIC_CALLED_ON_INSTANCE",
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};
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static_assert((sizeof(names) / sizeof(*names)) == WARNING_MAX, "Amount of warning types don't match the amount of warning names.");
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return names[(int)p_code];
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}
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String GDScriptWarning::get_settings_path_from_code(Code p_code) {
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return "debug/gdscript/warnings/" + get_name_from_code(p_code).to_lower();
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}
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GDScriptWarning::Code GDScriptWarning::get_code_from_name(const String &p_name) {
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for (int i = 0; i < WARNING_MAX; i++) {
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if (get_name_from_code((Code)i) == p_name) {
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return (Code)i;
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}
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}
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return WARNING_MAX;
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}
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#endif // DEBUG_ENABLED
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