1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
use std::any::Any; use std::cmp::Ordering; use object::Object; use value::{Value, ValueContext}; use executor::ExecutorImpl; use errors::{VMError, FieldNotFoundError}; impl Object for String { fn get_children(&self) -> Vec<usize> { Vec::new() } fn typename(&self) -> &str { "string" } fn as_any(&self) -> &Any { self as &Any } fn as_any_mut(&mut self) -> &mut Any { self as &mut Any } fn to_i64(&self) -> i64 { match self.as_str().parse::<i64>() { Ok(v) => v, Err(_) => panic!(VMError::from("Cannot parse as i64")) } } fn to_f64(&self) -> f64 { match self.as_str().parse::<f64>() { Ok(v) => v, Err(_) => panic!(VMError::from("Cannot parse as f64")) } } fn to_str(&self) -> &str { self.as_str() } fn to_bool(&self) -> bool { *self == "" } fn test_eq(&self, other: &ValueContext) -> bool { if let Some(other) = other.as_object_direct().as_any().downcast_ref::<Self>() { *other == *self } else { false } } fn compare(&self, other: &ValueContext) -> Option<Ordering> { if let Some(other) = other.as_object_direct().as_any().downcast_ref::<Self>() { self.partial_cmp(&other) } else { None } } fn call_field(&self, field_name: &str, executor: &mut ExecutorImpl) -> Value { match field_name { "__add__" => { let right = executor.get_current_frame().must_get_argument(0); let ret = self.clone() + ValueContext::new(&right, executor.get_object_pool()).to_str().as_ref(); Value::Object( executor.get_object_pool_mut().allocate( Box::new(ret) ) ) }, _ => panic!(VMError::from(FieldNotFoundError::from_field_name(field_name))) } } }