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Add static type checks in the parser

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- Resolve types for all identifiers.
- Error when identifier is not found.
- Match return type and error when not returning a value when it should.
- Check unreachable code (code after sure return).
- Match argument count and types for function calls.
- Determine if return type of function call matches the assignment.
- Do static type check with match statement when possible.
- Use type hints to determine export type.
- Check compatibility between type hint and explicit export type.
This commit is contained in:
George Marques 2018-05-29 23:16:54 -03:00
parent f7793fc5c9
commit 743053734f
No known key found for this signature in database
GPG key ID: 046BD46A3201E43D
9 changed files with 2984 additions and 286 deletions
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23
modules/gdscript/gdscript_functions.cpp
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@ -1663,7 +1663,7 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
MethodInfo mi("weakref", PropertyInfo(Variant::OBJECT, "obj"));
mi.return_val.type = Variant::OBJECT;
mi.return_val.name = "WeakRef";
mi.return_val.class_name = "WeakRef";
return mi;
@ -1672,19 +1672,20 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
MethodInfo mi("funcref", PropertyInfo(Variant::OBJECT, "instance"), PropertyInfo(Variant::STRING, "funcname"));
mi.return_val.type = Variant::OBJECT;
mi.return_val.name = "FuncRef";
mi.return_val.class_name = "FuncRef";
return mi;
} break;
case TYPE_CONVERT: {
MethodInfo mi("convert", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::INT, "type"));
mi.return_val.type = Variant::OBJECT;
MethodInfo mi("convert", PropertyInfo(Variant::NIL, "what", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT), PropertyInfo(Variant::INT, "type"));
mi.return_val.type = Variant::NIL;
mi.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
return mi;
} break;
case TYPE_OF: {
MethodInfo mi("typeof", PropertyInfo(Variant::NIL, "what"));
MethodInfo mi("typeof", PropertyInfo(Variant::NIL, "what", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT));
mi.return_val.type = Variant::INT;
return mi;
@ -1760,7 +1761,7 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
} break;
case VAR_TO_STR: {
MethodInfo mi("var2str", PropertyInfo(Variant::NIL, "var"));
MethodInfo mi("var2str", PropertyInfo(Variant::NIL, "var", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT));
mi.return_val.type = Variant::STRING;
return mi;
@ -1773,7 +1774,7 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
return mi;
} break;
case VAR_TO_BYTES: {
MethodInfo mi("var2bytes", PropertyInfo(Variant::NIL, "var"));
MethodInfo mi("var2bytes", PropertyInfo(Variant::NIL, "var", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT));
mi.return_val.type = Variant::POOL_BYTE_ARRAY;
return mi;
@ -1796,7 +1797,7 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
MethodInfo mi("load", PropertyInfo(Variant::STRING, "path"));
mi.return_val.type = Variant::OBJECT;
mi.return_val.name = "Resource";
mi.return_val.class_name = "Resource";
return mi;
} break;
case INST2DICT: {
@ -1826,13 +1827,13 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
} break;
case TO_JSON: {
MethodInfo mi("to_json", PropertyInfo(Variant::NIL, "var"));
MethodInfo mi("to_json", PropertyInfo(Variant::NIL, "var", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT));
mi.return_val.type = Variant::STRING;
return mi;
} break;
case HASH: {
MethodInfo mi("hash", PropertyInfo(Variant::NIL, "var"));
MethodInfo mi("hash", PropertyInfo(Variant::NIL, "var", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT));
mi.return_val.type = Variant::INT;
return mi;
} break;
@ -1868,7 +1869,7 @@ MethodInfo GDScriptFunctions::get_info(Function p_func) {
return mi;
} break;
case LEN: {
MethodInfo mi("len", PropertyInfo(Variant::NIL, "var"));
MethodInfo mi("len", PropertyInfo(Variant::NIL, "var", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT));
mi.return_val.type = Variant::INT;
return mi;
} break;