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GDScript: Implement lambdas compilation and runtime

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George Marques 2021-03-28 11:03:13 -03:00
parent 3155368093
commit c201b212c7
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16 changed files with 364 additions and 39 deletions
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modules/gdscript/gdscript_lambda_callable.cpp Normal file
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/*************************************************************************/
/* gdscript_lambda_callable.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gdscript_lambda_callable.h"
#include "core/templates/hashfuncs.h"
#include "gdscript.h"
bool GDScriptLambdaCallable::compare_equal(const CallableCustom *p_a, const CallableCustom *p_b) {
// Lambda callables are only compared by reference.
return p_a == p_b;
}
bool GDScriptLambdaCallable::compare_less(const CallableCustom *p_a, const CallableCustom *p_b) {
// Lambda callables are only compared by reference.
return p_a < p_b;
}
uint32_t GDScriptLambdaCallable::hash() const {
return h;
}
String GDScriptLambdaCallable::get_as_text() const {
if (function->get_name() != StringName()) {
return function->get_name().operator String() + "(lambda)";
}
return "(anonymous lambda)";
}
CallableCustom::CompareEqualFunc GDScriptLambdaCallable::get_compare_equal_func() const {
return compare_equal;
}
CallableCustom::CompareLessFunc GDScriptLambdaCallable::get_compare_less_func() const {
return compare_less;
}
ObjectID GDScriptLambdaCallable::get_object() const {
return script->get_instance_id();
}
void GDScriptLambdaCallable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
int captures_amount = captures.size();
if (captures_amount > 0) {
Vector<const Variant *> args;
args.resize(p_argcount + captures_amount);
for (int i = 0; i < captures_amount; i++) {
args.write[i] = &captures[i];
}
for (int i = 0; i < p_argcount; i++) {
args.write[i + captures_amount] = p_arguments[i];
}
r_return_value = function->call(nullptr, args.ptrw(), args.size(), r_call_error);
r_call_error.argument -= captures_amount;
} else {
r_return_value = function->call(nullptr, p_arguments, p_argcount, r_call_error);
}
}
GDScriptLambdaCallable::GDScriptLambdaCallable(Ref<GDScript> p_script, GDScriptFunction *p_function, const Vector<Variant> &p_captures) {
script = p_script;
function = p_function;
captures = p_captures;
h = (uint32_t)hash_djb2_one_64((uint64_t)this);
}