1use crate::{equals, evaluate, Context, Val};2use crate::{error::Error::*, throw, Result};3use jrsonnet_parser::{BinaryOpType, LocExpr, UnaryOpType};45pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {6 use UnaryOpType::*;7 use Val::*;8 Ok(match (op, b) {9 (Not, Bool(v)) => Bool(!v),10 (Minus, Num(n)) => Num(-*n),11 (BitNot, Num(n)) => Num(!(*n as i32) as f64),12 (op, o) => throw!(UnaryOperatorDoesNotOperateOnType(op, o.value_type())),13 })14}1516pub fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {17 use Val::*;18 Ok(match (a, b) {19 (Str(v1), Str(v2)) => Str(((**v1).to_owned() + v2).into()),2021 22 (Num(n), Str(o)) => Str(format!("{}{}", n, o).into()),23 (Str(o), Num(n)) => Str(format!("{}{}", o, n).into()),2425 (Str(s), o) => Str(format!("{}{}", s, o.clone().to_string()?).into()),26 (o, Str(s)) => Str(format!("{}{}", o.clone().to_string()?, s).into()),2728 (Obj(v1), Obj(v2)) => Obj(v2.extend_from(v1.clone())),29 (Arr(a), Arr(b)) => {30 let mut out = Vec::with_capacity(a.len() + b.len());31 out.extend(a.iter_lazy());32 out.extend(b.iter_lazy());33 Arr(out.into())34 }35 (Num(v1), Num(v2)) => Val::new_checked_num(v1 + v2)?,36 _ => throw!(BinaryOperatorDoesNotOperateOnValues(37 BinaryOpType::Add,38 a.value_type(),39 b.value_type(),40 )),41 })42}4344pub fn evaluate_binary_op_special(45 context: Context,46 a: &LocExpr,47 op: BinaryOpType,48 b: &LocExpr,49) -> Result<Val> {50 use BinaryOpType::*;51 use Val::*;52 Ok(match (evaluate(context.clone(), a)?, op, b) {53 (Bool(true), Or, _o) => Val::Bool(true),54 (Bool(false), And, _o) => Val::Bool(false),55 (a, op, eb) => evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?)?,56 })57}5859pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {60 use BinaryOpType::*;61 use Val::*;62 Ok(match (a, op, b) {63 (Str(a), In, Obj(obj)) => Bool(obj.has_field_ex(a.clone(), true)),6465 (a, Add, b) => evaluate_add_op(a, b)?,6667 (a, Eq, b) => Bool(equals(a, b)?),68 (a, Neq, b) => Bool(!equals(a, b)?),6970 (Str(v1), Mul, Num(v2)) => Str(v1.repeat(*v2 as usize).into()),7172 73 (Bool(a), And, Bool(b)) => Bool(*a && *b),74 (Bool(a), Or, Bool(b)) => Bool(*a || *b),7576 77 (Str(v1), Lt, Str(v2)) => Bool(v1 < v2),78 (Str(v1), Gt, Str(v2)) => Bool(v1 > v2),79 (Str(v1), Lte, Str(v2)) => Bool(v1 <= v2),80 (Str(v1), Gte, Str(v2)) => Bool(v1 >= v2),8182 83 (Num(v1), Mul, Num(v2)) => Val::new_checked_num(v1 * v2)?,84 (Num(v1), Div, Num(v2)) => {85 if *v2 <= f64::EPSILON {86 throw!(DivisionByZero)87 }88 Val::new_checked_num(v1 / v2)?89 }9091 (Num(v1), Sub, Num(v2)) => Val::new_checked_num(v1 - v2)?,9293 (Num(v1), Lt, Num(v2)) => Bool(v1 < v2),94 (Num(v1), Gt, Num(v2)) => Bool(v1 > v2),95 (Num(v1), Lte, Num(v2)) => Bool(v1 <= v2),96 (Num(v1), Gte, Num(v2)) => Bool(v1 >= v2),9798 (Num(v1), BitAnd, Num(v2)) => Num(((*v1 as i32) & (*v2 as i32)) as f64),99 (Num(v1), BitOr, Num(v2)) => Num(((*v1 as i32) | (*v2 as i32)) as f64),100 (Num(v1), BitXor, Num(v2)) => Num(((*v1 as i32) ^ (*v2 as i32)) as f64),101 (Num(v1), Lhs, Num(v2)) => {102 if *v2 < 0.0 {103 throw!(RuntimeError("shift by negative exponent".into()))104 }105 Num(((*v1 as i32) << (*v2 as i32)) as f64)106 }107 (Num(v1), Rhs, Num(v2)) => {108 if *v2 < 0.0 {109 throw!(RuntimeError("shift by negative exponent".into()))110 }111 Num(((*v1 as i32) >> (*v2 as i32)) as f64)112 }113114 _ => throw!(BinaryOperatorDoesNotOperateOnValues(115 op,116 a.value_type(),117 b.value_type(),118 )),119 })120}