dbus/arg/
variantstruct_impl.rs

1use super::*;
2use crate::Signature;
3use std::any;
4use std::collections::VecDeque;
5
6#[derive(Copy, Clone, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
7/// A simple wrapper to specify a D-Bus variant.
8///
9/// See the argument guide and module level documentation for details and examples.
10pub struct Variant<T>(pub T);
11
12impl Variant<Box<dyn RefArg>> {
13    /// Creates a new refarg from an Iter. Mainly for internal use.
14    pub fn new_refarg<'a>(i: &mut Iter<'a>) -> Option<Self> {
15        i.recurse(ArgType::Variant).and_then(|mut si| si.get_refarg()).map(Variant)
16    }
17}
18
19impl<T:Default> Default for Variant<T> {
20    fn default() -> Self { Variant(T::default()) }
21}
22
23
24impl<T> Arg for Variant<T> {
25    const ARG_TYPE: ArgType = ArgType::Variant;
26    fn signature() -> Signature<'static> { unsafe { Signature::from_slice_unchecked("v\0") } }
27}
28
29impl<T: Arg + Append> Append for Variant<T> {
30    fn append_by_ref(&self, i: &mut IterAppend) {
31        let z = &self.0;
32        i.append_container(ArgType::Variant, Some(T::signature().as_cstr()), |s| z.append_by_ref(s));
33    }
34}
35
36impl Append for Variant<Box<dyn RefArg>> {
37    fn append_by_ref(&self, i: &mut IterAppend) {
38        let z = &self.0;
39        i.append_container(ArgType::Variant, Some(z.signature().as_cstr()), |s| z.append(s));
40    }
41}
42
43impl<'a, T: Get<'a>> Get<'a> for Variant<T> {
44    fn get(i: &mut Iter<'a>) -> Option<Variant<T>> {
45        i.recurse(ArgType::Variant).and_then(|mut si| si.get().map(Variant))
46    }
47}
48
49impl<'a> Get<'a> for Variant<Iter<'a>> {
50    fn get(i: &mut Iter<'a>) -> Option<Variant<Iter<'a>>> {
51        i.recurse(ArgType::Variant).map(Variant)
52    }
53}
54/*
55impl<'a> Get<'a> for Variant<Box<dyn RefArg>> {
56    fn get(i: &mut Iter<'a>) -> Option<Variant<Box<dyn RefArg>>> {
57        i.recurse(ArgType::Variant).and_then(|mut si| si.get_refarg().map(|v| Variant(v)))
58    }
59}
60*/
61impl<T: RefArg> RefArg for Variant<T> {
62    fn arg_type(&self) -> ArgType { ArgType::Variant }
63    fn signature(&self) -> Signature<'static> { unsafe { Signature::from_slice_unchecked("v\0") } }
64    fn append(&self, i: &mut IterAppend) {
65        let z = &self.0;
66        i.append_container(ArgType::Variant, Some(z.signature().as_cstr()), |s| z.append(s));
67    }
68    #[inline]
69    fn as_any(&self) -> &dyn any::Any where T: 'static { self }
70    #[inline]
71    fn as_any_mut(&mut self) -> &mut dyn any::Any where T: 'static { self }
72    #[inline]
73    fn as_i64(&self) -> Option<i64> { self.0.as_i64() }
74    #[inline]
75    fn as_u64(&self) -> Option<u64> { self.0.as_u64() }
76    #[inline]
77    fn as_f64(&self) -> Option<f64> { self.0.as_f64() }
78    #[inline]
79    fn as_str(&self) -> Option<&str> { self.0.as_str() }
80    #[inline]
81    fn as_iter<'a>(&'a self) -> Option<Box<dyn Iterator<Item=&'a dyn RefArg> + 'a>> {
82        use std::iter;
83        let z: &dyn RefArg = &self.0;
84        Some(Box::new(iter::once(z)))
85    }
86    #[inline]
87    fn box_clone(&self) -> Box<dyn RefArg + 'static> { Box::new(Variant(self.0.box_clone())) }
88    #[inline]
89    fn as_static_inner(&self, index: usize) -> Option<&(dyn RefArg + 'static)> where Self: 'static {
90        if index == 0 { Some(&self.0) } else { None }
91    }
92}
93
94macro_rules! struct_impl {
95    ( $($n: ident $t: ident,)+ ) => {
96
97/// Tuples are represented as D-Bus structs.
98impl<$($t: Arg),*> Arg for ($($t,)*) {
99    const ARG_TYPE: ArgType = ArgType::Struct;
100    fn signature() -> Signature<'static> {
101        let mut s = String::from("(");
102        $( s.push_str(&$t::signature()); )*
103        s.push_str(")");
104        Signature::from(s)
105    }
106}
107
108impl<$($t: Append),*> Append for ($($t,)*) {
109    fn append_by_ref(&self, i: &mut IterAppend) {
110        let ( $($n,)*) = self;
111        i.append_container(ArgType::Struct, None, |s| { $( $n.append_by_ref(s); )* });
112    }
113}
114
115impl<'a, $($t: Get<'a>),*> Get<'a> for ($($t,)*) {
116    fn get(i: &mut Iter<'a>) -> Option<Self> {
117        let si = i.recurse(ArgType::Struct);
118        if si.is_none() { return None; }
119        let mut si = si.unwrap();
120        let mut _valid_item = true;
121        $(
122            if !_valid_item { return None; }
123            let $n: Option<$t> = si.get();
124            if $n.is_none() { return None; }
125            _valid_item = si.next();
126        )*
127        Some(($( $n.unwrap(), )* ))
128    }
129}
130
131impl<$($t: RefArg),*> RefArg for ($($t,)*) {
132    fn arg_type(&self) -> ArgType { ArgType::Struct }
133    fn signature(&self) -> Signature<'static> {
134        let &( $(ref $n,)*) = self;
135        let mut s = String::from("(");
136        $( s.push_str(&$n.signature()); )*
137        s.push_str(")");
138        Signature::from(s)
139    }
140    fn append(&self, i: &mut IterAppend) {
141        let &( $(ref $n,)*) = self;
142        i.append_container(ArgType::Struct, None, |s| { $( $n.append(s); )* });
143    }
144    fn as_any(&self) -> &dyn any::Any where Self: 'static { self }
145    fn as_any_mut(&mut self) -> &mut dyn any::Any where Self: 'static { self }
146    fn as_iter<'a>(&'a self) -> Option<Box<dyn Iterator<Item=&'a dyn RefArg> + 'a>> {
147        let &( $(ref $n,)*) = self;
148        let v = vec!(
149        $( $n as &dyn RefArg, )*
150        );
151        Some(Box::new(v.into_iter()))
152    }
153    fn as_static_inner(&self, index: usize) -> Option<&(dyn RefArg + 'static)> where Self: 'static {
154        let &( $(ref $n,)*) = self;
155        let arr = [ $($n as &dyn RefArg,)*];
156        arr.get(index).map(|x| *x)
157    }
158    #[inline]
159    fn box_clone(&self) -> Box<dyn RefArg + 'static> {
160        let &( $(ref $n,)*) = self;
161        let mut z = VecDeque::new();
162        $( z.push_back($n.box_clone()); )*
163        Box::new(z)
164    }
165}
166
167
168}} // macro_rules end
169
170struct_impl!(a A,);
171struct_impl!(a A, b B,);
172struct_impl!(a A, b B, c C,);
173struct_impl!(a A, b B, c C, d D,);
174struct_impl!(a A, b B, c C, d D, e E,);
175struct_impl!(a A, b B, c C, d D, e E, f F,);
176struct_impl!(a A, b B, c C, d D, e E, f F, g G,);
177struct_impl!(a A, b B, c C, d D, e E, f F, g G, h H,);
178struct_impl!(a A, b B, c C, d D, e E, f F, g G, h H, i I,);
179struct_impl!(a A, b B, c C, d D, e E, f F, g G, h H, i I, j J,);
180struct_impl!(a A, b B, c C, d D, e E, f F, g G, h H, i I, j J, k K,);
181struct_impl!(a A, b B, c C, d D, e E, f F, g G, h H, i I, j J, k K, l L,);
182
183impl RefArg for VecDeque<Box<dyn RefArg>> {
184    fn arg_type(&self) -> ArgType { ArgType::Struct }
185    fn signature(&self) -> Signature<'static> {
186        let mut s = String::from("(");
187        for z in self {
188            s.push_str(&z.signature());
189        }
190        s.push_str(")");
191        Signature::from(s)
192    }
193    fn append(&self, i: &mut IterAppend) {
194        i.append_container(ArgType::Struct, None, |s| {
195            for z in self { z.append(s); }
196        });
197    }
198    #[inline]
199    fn as_any(&self) -> &dyn any::Any where Self: 'static { self }
200    #[inline]
201    fn as_any_mut(&mut self) -> &mut dyn any::Any where Self: 'static { self }
202    fn as_iter<'a>(&'a self) -> Option<Box<dyn Iterator<Item=&'a dyn RefArg> + 'a>> {
203        Some(Box::new(self.iter().map(|b| &**b)))
204    }
205    #[inline]
206    fn as_static_inner(&self, index: usize) -> Option<&(dyn RefArg + 'static)> where Self: 'static {
207        self.get(index).map(|x| x as &dyn RefArg)
208    }
209    #[inline]
210    fn box_clone(&self) -> Box<dyn RefArg + 'static> {
211        let t: VecDeque<Box<dyn RefArg + 'static>> = self.iter().map(|x| x.box_clone()).collect();
212        Box::new(t)
213    }
214}
dbus/arg/variantstruct_impl.rs

dbus/arg/
variantstruct_impl.rs
