-
Notifications
You must be signed in to change notification settings - Fork 21
/
mod.rs
174 lines (160 loc) Β· 5.19 KB
/
mod.rs
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
pub mod error;
pub mod traits;
use std::collections::HashSet;
use proc_macro2::TokenStream;
use quote::{quote, ToTokens};
use syn::Generics;
use self::{error::gen_validation_error_type, traits::gen_traits};
use super::{
models::{
IntegerDeriveTrait, IntegerGuard, IntegerInnerType, IntegerSanitizer, IntegerType,
IntegerValidator,
},
IntegerNewtype,
};
use crate::common::{
gen::{
error::gen_error_type_name,
tests::{
gen_test_should_have_consistent_lower_and_upper_boundaries,
gen_test_should_have_valid_default_value,
},
traits::GeneratedTraits,
GenerateNewtype,
},
models::{ErrorTypeName, Guard, TypeName},
};
impl<T> GenerateNewtype for IntegerNewtype<T>
where
T: IntegerType + ToTokens + PartialOrd,
{
type Sanitizer = IntegerSanitizer<T>;
type Validator = IntegerValidator<T>;
type InnerType = IntegerInnerType;
type TypedTrait = IntegerDeriveTrait;
fn gen_fn_sanitize(
inner_type: &Self::InnerType,
sanitizers: &[Self::Sanitizer],
) -> TokenStream {
let transformations: TokenStream = sanitizers
.iter()
.map(|san| match san {
IntegerSanitizer::With(custom_sanitizer) => {
quote!(
value = (#custom_sanitizer)(value);
)
}
IntegerSanitizer::_Phantom(_) => {
unreachable!("integer::gen: IntegerSanitizer::_Phantom must not be used")
}
})
.collect();
quote!(
fn __sanitize__(mut value: #inner_type) -> #inner_type {
#transformations
value
}
)
}
fn gen_fn_validate(
inner_type: &Self::InnerType,
type_name: &TypeName,
validators: &[Self::Validator],
) -> TokenStream {
let error_name = gen_error_type_name(type_name);
let validations: TokenStream = validators
.iter()
.map(|validator| match validator {
IntegerValidator::Less(exclusive_upper_bound) => {
quote!(
if val >= #exclusive_upper_bound {
return Err(#error_name::LessViolated);
}
)
}
IntegerValidator::LessOrEqual(max) => {
quote!(
if val > #max {
return Err(#error_name::LessOrEqualViolated);
}
)
}
IntegerValidator::Greater(exclusive_lower_bound) => {
quote!(
if val <= #exclusive_lower_bound {
return Err(#error_name::GreaterViolated);
}
)
}
IntegerValidator::GreaterOrEqual(min) => {
quote!(
if val < #min {
return Err(#error_name::GreaterOrEqualViolated);
}
)
}
IntegerValidator::Predicate(custom_is_valid_fn) => {
quote!(
if !(#custom_is_valid_fn)(&val) {
return Err(#error_name::PredicateViolated);
}
)
}
})
.collect();
quote!(
fn __validate__(val: &#inner_type) -> ::core::result::Result<(), #error_name> {
let val = *val;
#validations
Ok(())
}
)
}
fn gen_validation_error_type(
type_name: &TypeName,
validators: &[Self::Validator],
) -> TokenStream {
gen_validation_error_type(type_name, validators)
}
fn gen_traits(
type_name: &TypeName,
generics: &Generics,
inner_type: &Self::InnerType,
maybe_error_type_name: Option<ErrorTypeName>,
traits: HashSet<Self::TypedTrait>,
maybe_default_value: Option<syn::Expr>,
guard: &IntegerGuard<T>,
) -> Result<GeneratedTraits, syn::Error> {
gen_traits(
type_name,
generics,
inner_type,
maybe_error_type_name,
traits,
maybe_default_value,
guard,
)
}
fn gen_tests(
type_name: &TypeName,
generics: &Generics,
_inner_type: &Self::InnerType,
maybe_default_value: &Option<syn::Expr>,
guard: &Guard<Self::Sanitizer, Self::Validator>,
_traits: &HashSet<Self::TypedTrait>,
) -> TokenStream {
let test_lower_vs_upper = guard.validators().and_then(|validators| {
gen_test_should_have_consistent_lower_and_upper_boundaries(type_name, validators)
});
let test_valid_default_value = gen_test_should_have_valid_default_value(
type_name,
generics,
maybe_default_value,
guard.has_validation(),
);
quote! {
#test_lower_vs_upper
#test_valid_default_value
}
}
}