#[cfg(test)]
mod tests;
use super::{Executable, Interpreter};
use crate::{
builtins::value::{ResultValue, Value},
environment::lexical_environment::VariableScope,
syntax::ast::{
node::{Assign, BinOp, Node, UnaryOp},
op::{self, AssignOp, BitOp, CompOp, LogOp, NumOp},
},
BoaProfiler,
};
impl Executable for Assign {
fn run(&self, interpreter: &mut Interpreter) -> ResultValue {
let _timer = BoaProfiler::global().start_event("Assign", "exec");
let val = self.rhs().run(interpreter)?;
match self.lhs() {
Node::Identifier(ref name) => {
let environment = &mut interpreter.realm_mut().environment;
if environment.has_binding(name.as_ref()) {
environment.set_mutable_binding(name.as_ref(), val.clone(), true);
} else {
environment.create_mutable_binding(
name.as_ref().to_owned(),
true,
VariableScope::Function,
);
environment.initialize_binding(name.as_ref(), val.clone());
}
}
Node::GetConstField(ref get_const_field) => {
let val_obj = get_const_field.obj().run(interpreter)?;
val_obj.set_field(get_const_field.field(), val.clone());
}
Node::GetField(ref get_field) => {
let val_obj = get_field.obj().run(interpreter)?;
let val_field = get_field.field().run(interpreter)?;
val_obj.set_field(val_field, val.clone());
}
_ => (),
}
Ok(val)
}
}
impl Executable for BinOp {
fn run(&self, interpreter: &mut Interpreter) -> ResultValue {
match self.op() {
op::BinOp::Num(op) => {
let v_a = self.lhs().run(interpreter)?;
let v_b = self.rhs().run(interpreter)?;
Ok(match op {
NumOp::Add => v_a + v_b,
NumOp::Sub => v_a - v_b,
NumOp::Mul => v_a * v_b,
NumOp::Exp => v_a.as_num_to_power(v_b),
NumOp::Div => v_a / v_b,
NumOp::Mod => v_a % v_b,
})
}
op::BinOp::Bit(op) => {
let v_a = self.lhs().run(interpreter)?;
let v_b = self.rhs().run(interpreter)?;
Ok(match op {
BitOp::And => v_a & v_b,
BitOp::Or => v_a | v_b,
BitOp::Xor => v_a ^ v_b,
BitOp::Shl => v_a << v_b,
BitOp::Shr => v_a >> v_b,
BitOp::UShr => v_a >> v_b,
})
}
op::BinOp::Comp(op) => {
let v_a = self.lhs().run(interpreter)?;
let v_b = self.rhs().run(interpreter)?;
Ok(Value::from(match op {
CompOp::Equal => v_a.equals(&v_b, interpreter)?,
CompOp::NotEqual => !v_a.equals(&v_b, interpreter)?,
CompOp::StrictEqual => v_a.strict_equals(&v_b),
CompOp::StrictNotEqual => !v_a.strict_equals(&v_b),
CompOp::GreaterThan => v_a.to_number() > v_b.to_number(),
CompOp::GreaterThanOrEqual => v_a.to_number() >= v_b.to_number(),
CompOp::LessThan => v_a.to_number() < v_b.to_number(),
CompOp::LessThanOrEqual => v_a.to_number() <= v_b.to_number(),
CompOp::In => {
if !v_b.is_object() {
return interpreter.throw_type_error(format!(
"right-hand side of 'in' should be an object, got {}",
v_b.get_type().as_str()
));
}
let key = interpreter.to_property_key(&v_a)?;
interpreter.has_property(&v_b, &key)
}
}))
}
op::BinOp::Log(op) => {
let to_bool = |value| bool::from(&value);
Ok(match op {
LogOp::And => Value::from(
to_bool(self.lhs().run(interpreter)?)
&& to_bool(self.rhs().run(interpreter)?),
),
LogOp::Or => Value::from(
to_bool(self.lhs().run(interpreter)?)
|| to_bool(self.rhs().run(interpreter)?),
),
})
}
op::BinOp::Assign(op) => match self.lhs() {
Node::Identifier(ref name) => {
let v_a = interpreter
.realm()
.environment
.get_binding_value(name.as_ref())
.ok_or_else(|| interpreter.construct_reference_error(name.as_ref()))?;
let v_b = self.rhs().run(interpreter)?;
let value = Self::run_assign(op, v_a, v_b);
interpreter.realm.environment.set_mutable_binding(
name.as_ref(),
value.clone(),
true,
);
Ok(value)
}
Node::GetConstField(ref get_const_field) => {
let v_r_a = get_const_field.obj().run(interpreter)?;
let v_a = v_r_a.get_field(get_const_field.field());
let v_b = self.rhs().run(interpreter)?;
let value = Self::run_assign(op, v_a, v_b);
v_r_a.set_field(get_const_field.field(), value.clone());
Ok(value)
}
_ => Ok(Value::undefined()),
},
}
}
}
impl BinOp {
fn run_assign(op: AssignOp, v_a: Value, v_b: Value) -> Value {
match op {
AssignOp::Add => v_a + v_b,
AssignOp::Sub => v_a - v_b,
AssignOp::Mul => v_a * v_b,
AssignOp::Exp => v_a.as_num_to_power(v_b),
AssignOp::Div => v_a / v_b,
AssignOp::Mod => v_a % v_b,
AssignOp::And => v_a & v_b,
AssignOp::Or => v_a | v_b,
AssignOp::Xor => v_a ^ v_b,
AssignOp::Shl => v_a << v_b,
AssignOp::Shr => v_a << v_b,
}
}
}
impl Executable for UnaryOp {
fn run(&self, interpreter: &mut Interpreter) -> ResultValue {
let v_a = self.target().run(interpreter)?;
Ok(match self.op() {
op::UnaryOp::Minus => -v_a,
op::UnaryOp::Plus => Value::from(v_a.to_number()),
op::UnaryOp::IncrementPost => {
let ret = v_a.clone();
interpreter.set_value(self.target(), Value::from(v_a.to_number() + 1.0))?;
ret
}
op::UnaryOp::IncrementPre => {
interpreter.set_value(self.target(), Value::from(v_a.to_number() + 1.0))?
}
op::UnaryOp::DecrementPost => {
let ret = v_a.clone();
interpreter.set_value(self.target(), Value::from(v_a.to_number() - 1.0))?;
ret
}
op::UnaryOp::DecrementPre => {
interpreter.set_value(self.target(), Value::from(v_a.to_number() - 1.0))?
}
op::UnaryOp::Not => !v_a,
op::UnaryOp::Tilde => {
let num_v_a = v_a.to_number();
Value::from(if num_v_a.is_nan() {
-1
} else {
!(num_v_a as i32)
})
}
op::UnaryOp::Void => Value::undefined(),
op::UnaryOp::Delete => match *self.target() {
Node::GetConstField(ref get_const_field) => Value::boolean(
get_const_field
.obj()
.run(interpreter)?
.remove_property(get_const_field.field()),
),
Node::GetField(ref get_field) => Value::boolean(
get_field
.obj()
.run(interpreter)?
.remove_property(&get_field.field().run(interpreter)?.to_string()),
),
Node::Identifier(_) => Value::boolean(false),
Node::ArrayDecl(_)
| Node::Block(_)
| Node::Const(_)
| Node::FunctionDecl(_)
| Node::FunctionExpr(_)
| Node::New(_)
| Node::Object(_)
| Node::UnaryOp(_) => Value::boolean(true),
_ => panic!("SyntaxError: wrong delete argument {}", self),
},
op::UnaryOp::TypeOf => Value::from(v_a.get_type().as_str()),
})
}
}