(mem) - Rust

field access expressions

(mem field? value?)

Where:

1. field: field name (the b in a.b) *
2. value: receiver expression (the a in a.b) *

Matching:

1. field access, e.g. value.field
2. chained access, e.g. value.field.subfield

Behavior

• When value is provided and the receiver is a chained access, it matches the inner field name (so (mem _ config) matches settings.config.value).

Examples

Find accesses to secrets on a config struct.

(mem secret (id config))

Selects in lines { 1 } but not in { 2, 3 }:

let token = config.secret;
let token = settings.secret;
let level = config.verbose;

---

Locate chained accesses that go through a config field.

(mem _ config)

Selects in lines { 1 } but not in { 2 }:

let path = settings.config.value;
let path = settings.env.value;

---

Arguments

field

1. Identifier: shorthand for (id)
   
2. Pattern: shorthand for (id)
   
3. (id)
   
4. (:into)
5. (:nearest)
6. (:and)
7. (:or)
8. (:not)
9. (:text)
10. (:kind)
11. (:replace)
12. (:replace-in)
13. (:capture)

value

1. Identifier: shorthand for (id)
   
2. Pattern: shorthand for (id)
   
3. (:ref)
4. (:into)
5. (:nearest)
6. (:and)
7. (:or)
8. (:not)
9. (:text)
10. (:kind)
11. (:replace)
12. (:replace-in)
13. (:capture)
14. (call)
15. (enum)
16. (fun)
17. (id)
18. (mem)
19. (num)
20. (str)