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LibJS: Add naive implementation of eval() :^)

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This parses and executes a code string in the caller's lexical scope.
This commit is contained in:
Andreas Kling 2021-03-14 16:20:01 +01:00
parent 64cb04996f
commit 4da3e5d91f
3 changed files with 22 additions and 0 deletions
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20
Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
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@ -25,9 +25,13 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/TemporaryChange.h>
#include <AK/Utf8View.h>
#include <LibJS/Console.h>
#include <LibJS/Heap/DeferGC.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Lexer.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/ArrayBufferConstructor.h>
#include <LibJS/Runtime/ArrayBufferPrototype.h>
#include <LibJS/Runtime/ArrayConstructor.h>
@ -119,6 +123,7 @@ void GlobalObject::initialize()
define_native_function(vm.names.isFinite, is_finite, 1, attr);
define_native_function(vm.names.parseFloat, parse_float, 1, attr);
define_native_function(vm.names.parseInt, parse_int, 1, attr);
define_native_function(vm.names.eval, eval, 1, attr);
define_property(vm.names.NaN, js_nan(), 0);
define_property(vm.names.Infinity, js_infinity(), 0);
@ -309,4 +314,19 @@ Value GlobalObject::get_this_binding(GlobalObject&) const
return Value(this);
}
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::eval)
{
auto code = vm.argument(0).to_string(global_object);
if (code.is_null())
return {};
JS::Parser parser { JS::Lexer { code } };
auto program = parser.parse_program();
auto& caller_frame = vm.call_stack().at(vm.call_stack().size() - 2);
TemporaryChange scope_change(vm.call_frame().scope, caller_frame->scope);
// FIXME: eval() should return the result of the executed code. This currently does not work.
return vm.interpreter().execute_statement(global_object, program);
}
}