mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 11:45:08 +00:00
1382dbc5e1
It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/NonnullOwnPtr.h>
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#include <LibJS/AST.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Object.h>
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#include <LibJS/Value.h>
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#include <stdio.h>
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//static void build_program_1(JS::Program&);
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static void build_program_2(JS::Program&);
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int main()
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{
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auto program = make<JS::Program>();
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build_program_2(*program);
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program->dump(0);
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JS::Interpreter interpreter;
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auto result = interpreter.run(*program);
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dbg() << "Interpreter returned " << result;
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printf("%s\n", result.to_string().characters());
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interpreter.heap().allocate<JS::Object>();
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dbg() << "Collecting garbage...";
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interpreter.heap().collect_garbage();
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interpreter.global_object().put("foo", JS::Value(123));
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dbg() << "Collecting garbage after overwriting global_object.foo...";
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interpreter.heap().collect_garbage();
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return 0;
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}
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#if 0
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void build_program_1(JS::Program& program)
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{
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// function foo() { return (1 + 2) + 3; }
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// foo();
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auto block = make<JS::BlockStatement>();
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block->append<JS::ReturnStatement>(
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make<JS::BinaryExpression>(
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JS::BinaryOp::Plus,
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make<JS::BinaryExpression>(
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JS::BinaryOp::Plus,
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make<JS::Literal>(JS::Value(1)),
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make<JS::Literal>(JS::Value(2))),
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make<JS::Literal>(JS::Value(3))));
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program.append<JS::FunctionDeclaration>("foo", move(block));
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program.append<JS::CallExpression>("foo");
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}
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#endif
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void build_program_2(JS::Program& program)
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{
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// c = 1;
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// function foo() {
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// var a = 5;
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// var b = 7;
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// return a + b + c;
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// }
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// foo();
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program.append<JS::AssignmentExpression>(
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JS::AssignmentOp::Assign,
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make<JS::Identifier>("c"),
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make<JS::Literal>(JS::Value(1)));
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auto block = make<JS::BlockStatement>();
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block->append<JS::VariableDeclaration>(
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make<JS::Identifier>("a"),
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make<JS::Literal>(JS::Value(5)));
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block->append<JS::VariableDeclaration>(
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make<JS::Identifier>("b"),
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make<JS::Literal>(JS::Value(7)));
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block->append<JS::ReturnStatement>(
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make<JS::BinaryExpression>(
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JS::BinaryOp::Plus,
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make<JS::BinaryExpression>(
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JS::BinaryOp::Plus,
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make<JS::Identifier>("a"),
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make<JS::Identifier>("b")),
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make<JS::Identifier>("c")));
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program.append<JS::FunctionDeclaration>("foo", move(block));
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program.append<JS::CallExpression>("foo");
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}
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