1use std::convert::TryInto;23use crate::builtin::std_format;4use crate::{equals, evaluate, Context, Val};5use crate::{error::Error::*, throw, Result};6use jrsonnet_parser::{BinaryOpType, LocExpr, UnaryOpType};78pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {9 use UnaryOpType::*;10 use Val::*;11 Ok(match (op, b) {12 (Not, Bool(v)) => Bool(!v),13 (Minus, Num(n)) => Num(-*n),14 (BitNot, Num(n)) => Num(!(*n as i32) as f64),15 (op, o) => throw!(UnaryOperatorDoesNotOperateOnType(op, o.value_type())),16 })17}1819pub fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {20 use Val::*;21 Ok(match (a, b) {22 (Str(v1), Str(v2)) => Str(((**v1).to_owned() + v2).into()),2324 25 (Num(n), Str(o)) => Str(format!("{}{}", n, o).into()),26 (Str(o), Num(n)) => Str(format!("{}{}", o, n).into()),2728 (Str(s), o) => Str(format!("{}{}", s, o.clone().to_string()?).into()),29 (o, Str(s)) => Str(format!("{}{}", o.clone().to_string()?, s).into()),3031 (Obj(v1), Obj(v2)) => Obj(v2.extend_from(v1.clone())),32 (Arr(a), Arr(b)) => {33 let mut out = Vec::with_capacity(a.len() + b.len());34 out.extend(a.iter_lazy());35 out.extend(b.iter_lazy());36 Arr(out.into())37 }38 (Num(v1), Num(v2)) => Val::new_checked_num(v1 + v2)?,39 _ => throw!(BinaryOperatorDoesNotOperateOnValues(40 BinaryOpType::Add,41 a.value_type(),42 b.value_type(),43 )),44 })45}4647pub fn evaluate_mod_op(a: &Val, b: &Val) -> Result<Val> {48 use Val::*;49 match (a, b) {50 (Num(a), Num(b)) => Ok(Num(a % b)),51 (Str(str), vals) => std_format(str.clone(), vals.clone())?.try_into(),52 (a, b) => throw!(BinaryOperatorDoesNotOperateOnValues(53 BinaryOpType::Mod,54 a.value_type(),55 b.value_type()56 )),57 }58}5960pub fn evaluate_binary_op_special(61 context: Context,62 a: &LocExpr,63 op: BinaryOpType,64 b: &LocExpr,65) -> Result<Val> {66 use BinaryOpType::*;67 use Val::*;68 Ok(match (evaluate(context.clone(), a)?, op, b) {69 (Bool(true), Or, _o) => Val::Bool(true),70 (Bool(false), And, _o) => Val::Bool(false),71 (a, op, eb) => evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?)?,72 })73}7475pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {76 use BinaryOpType::*;77 use Val::*;78 Ok(match (a, op, b) {79 (a, Add, b) => evaluate_add_op(a, b)?,8081 (a, Eq, b) => Bool(equals(a, b)?),82 (a, Neq, b) => Bool(!equals(a, b)?),8384 (Str(a), In, Obj(obj)) => Bool(obj.has_field_ex(a.clone(), true)),85 (a, Mod, b) => evaluate_mod_op(a, b)?,8687 (Str(v1), Mul, Num(v2)) => Str(v1.repeat(*v2 as usize).into()),8889 90 (Bool(a), And, Bool(b)) => Bool(*a && *b),91 (Bool(a), Or, Bool(b)) => Bool(*a || *b),9293 94 (Str(v1), Lt, Str(v2)) => Bool(v1 < v2),95 (Str(v1), Gt, Str(v2)) => Bool(v1 > v2),96 (Str(v1), Lte, Str(v2)) => Bool(v1 <= v2),97 (Str(v1), Gte, Str(v2)) => Bool(v1 >= v2),9899 100 (Num(v1), Mul, Num(v2)) => Val::new_checked_num(v1 * v2)?,101 (Num(v1), Div, Num(v2)) => {102 if *v2 <= f64::EPSILON {103 throw!(DivisionByZero)104 }105 Val::new_checked_num(v1 / v2)?106 }107108 (Num(v1), Sub, Num(v2)) => Val::new_checked_num(v1 - v2)?,109110 (Num(v1), Lt, Num(v2)) => Bool(v1 < v2),111 (Num(v1), Gt, Num(v2)) => Bool(v1 > v2),112 (Num(v1), Lte, Num(v2)) => Bool(v1 <= v2),113 (Num(v1), Gte, Num(v2)) => Bool(v1 >= v2),114115 (Num(v1), BitAnd, Num(v2)) => Num(((*v1 as i32) & (*v2 as i32)) as f64),116 (Num(v1), BitOr, Num(v2)) => Num(((*v1 as i32) | (*v2 as i32)) as f64),117 (Num(v1), BitXor, Num(v2)) => Num(((*v1 as i32) ^ (*v2 as i32)) as f64),118 (Num(v1), Lhs, Num(v2)) => {119 if *v2 < 0.0 {120 throw!(RuntimeError("shift by negative exponent".into()))121 }122 Num(((*v1 as i32) << (*v2 as i32)) as f64)123 }124 (Num(v1), Rhs, Num(v2)) => {125 if *v2 < 0.0 {126 throw!(RuntimeError("shift by negative exponent".into()))127 }128 Num(((*v1 as i32) >> (*v2 as i32)) as f64)129 }130131 _ => throw!(BinaryOperatorDoesNotOperateOnValues(132 op,133 a.value_type(),134 b.value_type(),135 )),136 })137}