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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
use crate::builtin::std_format;
use crate::{equals, evaluate, Context, Val};
use crate::{error::Error::*, throw, Result};
use jrsonnet_parser::{BinaryOpType, LocExpr, UnaryOpType};
pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {
use UnaryOpType::*;
use Val::*;
Ok(match (op, b) {
(Not, Bool(v)) => Bool(!v),
(Minus, Num(n)) => Num(-*n),
(BitNot, Num(n)) => Num(!(*n as i32) as f64),
(op, o) => throw!(UnaryOperatorDoesNotOperateOnType(op, o.value_type())),
})
}
pub fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {
use Val::*;
Ok(match (a, b) {
(Str(v1), Str(v2)) => Str(((**v1).to_owned() + v2).into()),
(Num(n), Str(o)) => Str(format!("{}{}", n, o).into()),
(Str(o), Num(n)) => Str(format!("{}{}", o, n).into()),
(Str(s), o) => Str(format!("{}{}", s, o.clone().to_string()?).into()),
(o, Str(s)) => Str(format!("{}{}", o.clone().to_string()?, s).into()),
(Obj(v1), Obj(v2)) => Obj(v2.extend_from(v1.clone())),
(Arr(a), Arr(b)) => {
let mut out = Vec::with_capacity(a.len() + b.len());
out.extend(a.iter_lazy());
out.extend(b.iter_lazy());
Arr(out.into())
}
(Num(v1), Num(v2)) => Val::new_checked_num(v1 + v2)?,
_ => throw!(BinaryOperatorDoesNotOperateOnValues(
BinaryOpType::Add,
a.value_type(),
b.value_type(),
)),
})
}
pub fn evaluate_mod_op(a: &Val, b: &Val) -> Result<Val> {
use Val::*;
match (a, b) {
(Num(a), Num(b)) => Ok(Num(a % b)),
(Str(str), vals) => std_format(str.clone(), vals.clone()),
(a, b) => throw!(BinaryOperatorDoesNotOperateOnValues(
BinaryOpType::Mod,
a.value_type(),
b.value_type()
)),
}
}
pub fn evaluate_binary_op_special(
context: Context,
a: &LocExpr,
op: BinaryOpType,
b: &LocExpr,
) -> Result<Val> {
use BinaryOpType::*;
use Val::*;
Ok(match (evaluate(context.clone(), a)?, op, b) {
(Bool(true), Or, _o) => Val::Bool(true),
(Bool(false), And, _o) => Val::Bool(false),
(a, op, eb) => evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?)?,
})
}
pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {
use BinaryOpType::*;
use Val::*;
Ok(match (a, op, b) {
(a, Add, b) => evaluate_add_op(a, b)?,
(a, Eq, b) => Bool(equals(a, b)?),
(a, Neq, b) => Bool(!equals(a, b)?),
(Str(a), In, Obj(obj)) => Bool(obj.has_field_ex(a.clone(), true)),
(a, Mod, b) => evaluate_mod_op(a, b)?,
(Str(v1), Mul, Num(v2)) => Str(v1.repeat(*v2 as usize).into()),
(Bool(a), And, Bool(b)) => Bool(*a && *b),
(Bool(a), Or, Bool(b)) => Bool(*a || *b),
(Str(v1), Lt, Str(v2)) => Bool(v1 < v2),
(Str(v1), Gt, Str(v2)) => Bool(v1 > v2),
(Str(v1), Lte, Str(v2)) => Bool(v1 <= v2),
(Str(v1), Gte, Str(v2)) => Bool(v1 >= v2),
(Num(v1), Mul, Num(v2)) => Val::new_checked_num(v1 * v2)?,
(Num(v1), Div, Num(v2)) => {
if *v2 <= f64::EPSILON {
throw!(DivisionByZero)
}
Val::new_checked_num(v1 / v2)?
}
(Num(v1), Sub, Num(v2)) => Val::new_checked_num(v1 - v2)?,
(Num(v1), Lt, Num(v2)) => Bool(v1 < v2),
(Num(v1), Gt, Num(v2)) => Bool(v1 > v2),
(Num(v1), Lte, Num(v2)) => Bool(v1 <= v2),
(Num(v1), Gte, Num(v2)) => Bool(v1 >= v2),
(Num(v1), BitAnd, Num(v2)) => Num(((*v1 as i32) & (*v2 as i32)) as f64),
(Num(v1), BitOr, Num(v2)) => Num(((*v1 as i32) | (*v2 as i32)) as f64),
(Num(v1), BitXor, Num(v2)) => Num(((*v1 as i32) ^ (*v2 as i32)) as f64),
(Num(v1), Lhs, Num(v2)) => {
if *v2 < 0.0 {
throw!(RuntimeError("shift by negative exponent".into()))
}
Num(((*v1 as i32) << (*v2 as i32)) as f64)
}
(Num(v1), Rhs, Num(v2)) => {
if *v2 < 0.0 {
throw!(RuntimeError("shift by negative exponent".into()))
}
Num(((*v1 as i32) >> (*v2 as i32)) as f64)
}
_ => throw!(BinaryOperatorDoesNotOperateOnValues(
op,
a.value_type(),
b.value_type(),
)),
})
}