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GDScript: Consolidate behavior for assigning enum types

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This makes sure that assigning values to enum-typed variables are
consistent. Same enum is always valid, different enum is always
invalid (without casting) and assigning `int` creates a warning
if there is no casting.

There are new test cases to ensure this behavior doesn't break in
the future.
This commit is contained in:
George Marques 2022-01-27 11:34:33 -03:00
parent 82efb1d262
commit ad6e2e82a9
No known key found for this signature in database
GPG key ID: 046BD46A3201E43D
27 changed files with 185 additions and 29 deletions
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46
modules/gdscript/gdscript_analyzer.cpp
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@ -650,9 +650,9 @@ void GDScriptAnalyzer::resolve_class_interface(GDScriptParser::ClassNode *p_clas
datatype = specified_type;
if (member.variable->initializer != nullptr) {
if (!is_type_compatible(datatype, member.variable->initializer->get_datatype(), true)) {
if (!is_type_compatible(datatype, member.variable->initializer->get_datatype(), true, member.variable->initializer)) {
// Try reverse test since it can be a masked subtype.
if (!is_type_compatible(member.variable->initializer->get_datatype(), datatype, true)) {
if (!is_type_compatible(member.variable->initializer->get_datatype(), datatype, true, member.variable->initializer)) {
push_error(vformat(R"(Value of type "%s" cannot be assigned to a variable of type "%s".)", member.variable->initializer->get_datatype().to_string(), datatype.to_string()), member.variable->initializer);
} else {
// TODO: Add warning.
@ -1400,9 +1400,9 @@ void GDScriptAnalyzer::resolve_variable(GDScriptParser::VariableNode *p_variable
type.is_meta_type = false;
if (p_variable->initializer != nullptr) {
if (!is_type_compatible(type, p_variable->initializer->get_datatype(), true)) {
if (!is_type_compatible(type, p_variable->initializer->get_datatype(), true, p_variable->initializer)) {
// Try reverse test since it can be a masked subtype.
if (!is_type_compatible(p_variable->initializer->get_datatype(), type, true)) {
if (!is_type_compatible(p_variable->initializer->get_datatype(), type, true, p_variable->initializer)) {
push_error(vformat(R"(Value of type "%s" cannot be assigned to a variable of type "%s".)", p_variable->initializer->get_datatype().to_string(), type.to_string()), p_variable->initializer);
} else {
// TODO: Add warning.
@ -1877,11 +1877,11 @@ void GDScriptAnalyzer::reduce_assignment(GDScriptParser::AssignmentNode *p_assig
if (!assignee_type.is_variant() && assigned_value_type.is_hard_type()) {
if (compatible) {
compatible = is_type_compatible(assignee_type, op_type, true);
compatible = is_type_compatible(assignee_type, op_type, true, p_assignment->assigned_value);
if (!compatible) {
if (assignee_type.is_hard_type()) {
// Try reverse test since it can be a masked subtype.
if (!is_type_compatible(op_type, assignee_type, true)) {
if (!is_type_compatible(op_type, assignee_type, true, p_assignment->assigned_value)) {
push_error(vformat(R"(Cannot assign a value of type "%s" to a target of type "%s".)", assigned_value_type.to_string(), assignee_type.to_string()), p_assignment->assigned_value);
} else {
// TODO: Add warning.
@ -2474,6 +2474,7 @@ void GDScriptAnalyzer::reduce_cast(GDScriptParser::CastNode *p_cast) {
GDScriptParser::DataType cast_type = resolve_datatype(p_cast->cast_type);
if (!cast_type.is_set()) {
mark_node_unsafe(p_cast);
return;
}
@ -2484,7 +2485,13 @@ void GDScriptAnalyzer::reduce_cast(GDScriptParser::CastNode *p_cast) {
GDScriptParser::DataType op_type = p_cast->operand->get_datatype();
if (!op_type.is_variant()) {
bool valid = false;
if (op_type.kind == GDScriptParser::DataType::BUILTIN && cast_type.kind == GDScriptParser::DataType::BUILTIN) {
if (op_type.kind == GDScriptParser::DataType::ENUM && cast_type.kind == GDScriptParser::DataType::ENUM) {
// Enum types are compatible between each other, so it's a safe cast.
valid = true;
} else if (op_type.kind == GDScriptParser::DataType::BUILTIN && op_type.builtin_type == Variant::INT && cast_type.kind == GDScriptParser::DataType::ENUM) {
// Convertint int to enum is always valid.
valid = true;
} else if (op_type.kind == GDScriptParser::DataType::BUILTIN && cast_type.kind == GDScriptParser::DataType::BUILTIN) {
valid = Variant::can_convert(op_type.builtin_type, cast_type.builtin_type);
} else if (op_type.kind != GDScriptParser::DataType::BUILTIN && cast_type.kind != GDScriptParser::DataType::BUILTIN) {
valid = is_type_compatible(cast_type, op_type) || is_type_compatible(op_type, cast_type);
@ -2640,15 +2647,16 @@ void GDScriptAnalyzer::reduce_identifier_from_base(GDScriptParser::IdentifierNod
GDScriptParser::DataType result;
result.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
result.kind = GDScriptParser::DataType::ENUM_VALUE;
result.kind = GDScriptParser::DataType::ENUM;
result.is_constant = true;
result.builtin_type = Variant::INT;
result.native_type = base.native_type;
result.enum_type = name;
result.enum_type = base.enum_type;
p_identifier->set_datatype(result);
} else {
// Consider as a Dictionary
// Consider as a Dictionary, so it can be anything.
GDScriptParser::DataType dummy;
dummy.type_source = GDScriptParser::DataType::UNDETECTED;
dummy.kind = GDScriptParser::DataType::VARIANT;
p_identifier->set_datatype(dummy);
}
@ -2793,7 +2801,7 @@ void GDScriptAnalyzer::reduce_identifier(GDScriptParser::IdentifierNode *p_ident
if (element.identifier->name == p_identifier->name) {
GDScriptParser::DataType type;
type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
type.kind = element.parent_enum->identifier ? GDScriptParser::DataType::ENUM_VALUE : GDScriptParser::DataType::BUILTIN;
type.kind = element.parent_enum->identifier ? GDScriptParser::DataType::ENUM : GDScriptParser::DataType::BUILTIN;
type.builtin_type = Variant::INT;
type.is_constant = true;
if (element.parent_enum->identifier) {
@ -3828,7 +3836,7 @@ GDScriptParser::DataType GDScriptAnalyzer::get_operation_type(Variant::Operator
}
// TODO: Add safe/unsafe return variable (for variant cases)
bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_target, const GDScriptParser::DataType &p_source, bool p_allow_implicit_conversion) const {
bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_target, const GDScriptParser::DataType &p_source, bool p_allow_implicit_conversion, const GDScriptParser::Node *p_source_node) {
// These return "true" so it doesn't affect users negatively.
ERR_FAIL_COND_V_MSG(!p_target.is_set(), true, "Parser bug (please report): Trying to check compatibility of unset target type");
ERR_FAIL_COND_V_MSG(!p_source.is_set(), true, "Parser bug (please report): Trying to check compatibility of unset value type");
@ -3848,7 +3856,7 @@ bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_targ
if (!valid && p_allow_implicit_conversion) {
valid = Variant::can_convert_strict(p_source.builtin_type, p_target.builtin_type);
}
if (!valid && p_target.builtin_type == Variant::INT && p_source.kind == GDScriptParser::DataType::ENUM_VALUE) {
if (!valid && p_target.builtin_type == Variant::INT && p_source.kind == GDScriptParser::DataType::ENUM && !p_source.is_meta_type) {
// Enum value is also integer.
valid = true;
}
@ -3869,6 +3877,11 @@ bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_targ
if (p_target.kind == GDScriptParser::DataType::ENUM) {
if (p_source.kind == GDScriptParser::DataType::BUILTIN && p_source.builtin_type == Variant::INT) {
#ifdef DEBUG_ENABLED
if (p_source_node) {
parser->push_warning(p_source_node, GDScriptWarning::INT_ASSIGNED_TO_ENUM);
}
#endif
return true;
}
if (p_source.kind == GDScriptParser::DataType::ENUM) {
@ -3876,11 +3889,6 @@ bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_targ
return true;
}
}
if (p_source.kind == GDScriptParser::DataType::ENUM_VALUE) {
if (p_source.native_type == p_target.native_type && p_target.enum_values.has(p_source.enum_type)) {
return true;
}
}
return false;
}
@ -3935,7 +3943,6 @@ bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_targ
case GDScriptParser::DataType::VARIANT:
case GDScriptParser::DataType::BUILTIN:
case GDScriptParser::DataType::ENUM:
case GDScriptParser::DataType::ENUM_VALUE:
case GDScriptParser::DataType::UNRESOLVED:
break; // Already solved before.
}
@ -3972,7 +3979,6 @@ bool GDScriptAnalyzer::is_type_compatible(const GDScriptParser::DataType &p_targ
case GDScriptParser::DataType::VARIANT:
case GDScriptParser::DataType::BUILTIN:
case GDScriptParser::DataType::ENUM:
case GDScriptParser::DataType::ENUM_VALUE:
case GDScriptParser::DataType::UNRESOLVED:
break; // Already solved before.
}