wiggle_generate/types/
mod.rs

1// mod r#enum;
2mod error;
3mod flags;
4mod handle;
5mod record;
6mod variant;
7
8use crate::codegen_settings::ErrorType;
9use crate::lifetimes::LifetimeExt;
10use crate::names;
11
12use proc_macro2::TokenStream;
13use quote::quote;
14
15pub fn define_datatype(namedtype: &witx::NamedType, error: Option<&ErrorType>) -> TokenStream {
16    match &namedtype.tref {
17        witx::TypeRef::Name(alias_to) => define_alias(&namedtype.name, &alias_to),
18        witx::TypeRef::Value(v) => match &**v {
19            witx::Type::Record(r) => match r.bitflags_repr() {
20                Some(repr) => flags::define_flags(&namedtype.name, repr, &r),
21                None => record::define_struct(&namedtype.name, &r),
22            },
23            witx::Type::Variant(v) => match error {
24                Some(ErrorType::Generated(error)) => {
25                    let d = variant::define_variant(&namedtype.name, &v, true);
26                    let e = error::define_error(&namedtype.name, &v, error);
27                    quote!( #d #e )
28                }
29                _ => variant::define_variant(&namedtype.name, &v, false),
30            },
31            witx::Type::Handle(h) => handle::define_handle(&namedtype.name, &h),
32            witx::Type::Builtin(b) => define_builtin(&namedtype.name, *b),
33            witx::Type::Pointer(p) => {
34                define_witx_pointer(&namedtype.name, quote!(wiggle::GuestPtr), p)
35            }
36            witx::Type::ConstPointer(p) => {
37                define_witx_pointer(&namedtype.name, quote!(wiggle::GuestPtr), p)
38            }
39            witx::Type::List(arr) => define_witx_list(&namedtype.name, &arr),
40        },
41    }
42}
43
44fn define_alias(name: &witx::Id, to: &witx::NamedType) -> TokenStream {
45    let ident = names::type_(name);
46    let rhs = names::type_(&to.name);
47    if to.tref.needs_lifetime() {
48        quote!(pub type #ident<'a> = #rhs<'a>;)
49    } else {
50        quote!(pub type #ident = #rhs;)
51    }
52}
53
54fn define_builtin(name: &witx::Id, builtin: witx::BuiltinType) -> TokenStream {
55    let ident = names::type_(name);
56    let built = names::builtin_type(builtin);
57    quote!(pub type #ident = #built;)
58}
59
60fn define_witx_pointer(
61    name: &witx::Id,
62    pointer_type: TokenStream,
63    pointee: &witx::TypeRef,
64) -> TokenStream {
65    let ident = names::type_(name);
66    let pointee_type = names::type_ref(pointee, quote!('a));
67
68    quote!(pub type #ident<'a> = #pointer_type<'a, #pointee_type>;)
69}
70
71fn define_witx_list(name: &witx::Id, arr_raw: &witx::TypeRef) -> TokenStream {
72    let ident = names::type_(name);
73    let pointee_type = names::type_ref(arr_raw, quote!());
74    quote!(pub type #ident = wiggle::GuestPtr<[#pointee_type]>;)
75}
76
77pub fn int_repr_tokens(int_repr: witx::IntRepr) -> TokenStream {
78    match int_repr {
79        witx::IntRepr::U8 => quote!(u8),
80        witx::IntRepr::U16 => quote!(u16),
81        witx::IntRepr::U32 => quote!(u32),
82        witx::IntRepr::U64 => quote!(u64),
83    }
84}
85
86pub trait WiggleType {
87    fn impls_display(&self) -> bool;
88}
89
90impl WiggleType for witx::TypeRef {
91    fn impls_display(&self) -> bool {
92        match self {
93            witx::TypeRef::Name(alias_to) => (&*alias_to).impls_display(),
94            witx::TypeRef::Value(v) => (&*v).impls_display(),
95        }
96    }
97}
98
99impl WiggleType for witx::NamedType {
100    fn impls_display(&self) -> bool {
101        self.tref.impls_display()
102    }
103}
104
105impl WiggleType for witx::Type {
106    fn impls_display(&self) -> bool {
107        match self {
108            witx::Type::Record(x) => x.impls_display(),
109            witx::Type::Variant(x) => x.impls_display(),
110            witx::Type::Handle(x) => x.impls_display(),
111            witx::Type::Builtin(x) => x.impls_display(),
112            witx::Type::Pointer { .. }
113            | witx::Type::ConstPointer { .. }
114            | witx::Type::List { .. } => false,
115        }
116    }
117}
118
119impl WiggleType for witx::BuiltinType {
120    fn impls_display(&self) -> bool {
121        true
122    }
123}
124
125impl WiggleType for witx::InterfaceFuncParam {
126    fn impls_display(&self) -> bool {
127        self.tref.impls_display()
128    }
129}
wiggle_generate/types/mod.rs

wiggle_generate/types/
mod.rs
