cxx_gen/syntax/
improper.rs

1use self::ImproperCtype::*;
2use crate::syntax::atom::Atom::{self, *};
3use crate::syntax::query::TypeQuery;
4use crate::syntax::Types;
5use proc_macro2::Ident;
6
7pub(crate) enum ImproperCtype<'a> {
8    Definite(bool),
9    Depends(&'a Ident),
10}
11
12impl<'a> Types<'a> {
13    // yes, no, maybe
14    pub(crate) fn determine_improper_ctype(
15        &self,
16        ty: impl Into<TypeQuery<'a>>,
17    ) -> ImproperCtype<'a> {
18        match ty.into() {
19            TypeQuery::Ident(ident) => {
20                let ident = &ident.rust;
21                if let Some(atom) = Atom::from(ident) {
22                    Definite(atom == RustString)
23                } else if let Some(strct) = self.structs.get(ident) {
24                    Depends(&strct.name.rust) // iterate to fixed-point
25                } else {
26                    Definite(self.rust.contains(ident) || self.aliases.contains_key(ident))
27                }
28            }
29            TypeQuery::RustBox
30            | TypeQuery::RustVec
31            | TypeQuery::Str
32            | TypeQuery::Fn
33            | TypeQuery::Void
34            | TypeQuery::SliceRef => Definite(true),
35            TypeQuery::UniquePtr
36            | TypeQuery::SharedPtr
37            | TypeQuery::WeakPtr
38            | TypeQuery::CxxVector => Definite(false),
39            TypeQuery::Ref(ty) => self.determine_improper_ctype(&ty.inner),
40            TypeQuery::Ptr(ty) => self.determine_improper_ctype(&ty.inner),
41            TypeQuery::Array(ty) => self.determine_improper_ctype(&ty.inner),
42        }
43    }
44}
cxx_gen/syntax/improper.rs

cxx_gen/syntax/
improper.rs
