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

#![deny(
  clippy::expect_used,
  clippy::explicit_deref_methods,
  clippy::option_if_let_else,
  clippy::await_holding_lock,
  clippy::cloned_instead_of_copied,
  clippy::explicit_into_iter_loop,
  clippy::flat_map_option,
  clippy::fn_params_excessive_bools,
  clippy::implicit_clone,
  clippy::inefficient_to_string,
  clippy::large_types_passed_by_value,
  clippy::manual_ok_or,
  clippy::map_flatten,
  clippy::map_unwrap_or,
  clippy::must_use_candidate,
  clippy::needless_for_each,
  clippy::needless_pass_by_value,
  clippy::option_option,
  clippy::redundant_else,
  clippy::semicolon_if_nothing_returned,
  clippy::too_many_lines,
  clippy::trivially_copy_pass_by_ref,
  clippy::unnested_or_patterns,
  clippy::future_not_send,
  clippy::useless_let_if_seq,
  clippy::str_to_string,
  clippy::inherent_to_string,
  clippy::let_and_return,
  clippy::string_to_string,
  clippy::try_err,
  clippy::unused_async,
  clippy::missing_enforced_import_renames,
  clippy::nonstandard_macro_braces,
  clippy::rc_mutex,
  clippy::unwrap_or_else_default,
  clippy::manual_split_once,
  clippy::derivable_impls,
  clippy::needless_option_as_deref,
  clippy::iter_not_returning_iterator,
  clippy::same_name_method,
  clippy::manual_assert,
  clippy::non_send_fields_in_send_ty,
  clippy::equatable_if_let,
  bad_style,
  clashing_extern_declarations,
  dead_code,
  deprecated,
  explicit_outlives_requirements,
  improper_ctypes,
  invalid_value,
  missing_copy_implementations,
  missing_debug_implementations,
  mutable_transmutes,
  no_mangle_generic_items,
  non_shorthand_field_patterns,
  overflowing_literals,
  path_statements,
  patterns_in_fns_without_body,
  private_in_public,
  trivial_bounds,
  trivial_casts,
  trivial_numeric_casts,
  type_alias_bounds,
  unconditional_recursion,
  unreachable_pub,
  unsafe_code,
  unstable_features,
  unused,
  unused_allocation,
  unused_comparisons,
  unused_import_braces,
  unused_parens,
  unused_qualifications,
  while_true,
  missing_docs
)]
#![doc = include_str!("../README.md")]

mod error;
mod flux;

pub use flux::*;

pub use error::Error;
use futures::Stream;
use wasmrs_runtime::ConditionallySendSync;

/// A generic trait to wrap over Flux, Mono, and supporting types.
pub trait Flux<I, E>: Stream<Item = Result<I, E>> + Unpin + ConditionallySendSync {}

#[cfg(target_family = "wasm")]
mod wasm {
  /// A utility type for a boxed future.
  pub type BoxMono<T, E> = std::pin::Pin<Box<dyn std::future::Future<Output = Result<T, E>> + 'static>>;

  /// A utility type for a boxed stream.
  pub type BoxFlux<T, E> = std::pin::Pin<Box<dyn futures::Stream<Item = Result<T, E>> + 'static>>;
}
#[cfg(target_family = "wasm")]
pub use wasm::*;

#[cfg(not(target_family = "wasm"))]
mod native {
  /// A utility type for a boxed future.
  pub type BoxMono<T, E> = std::pin::Pin<Box<dyn std::future::Future<Output = Result<T, E>> + Send + 'static>>;

  /// A utility type for a boxed stream.
  pub type BoxFlux<T, E> = std::pin::Pin<Box<dyn futures::Stream<Item = Result<T, E>> + Send + 'static>>;
}
#[cfg(not(target_family = "wasm"))]
pub use native::*;

impl<I, E, T> Flux<I, E> for T
where
  T: Stream<Item = Result<I, E>> + Unpin,
  T: ConditionallySendSync,
{
}

#[cfg(test)]
mod test {
  use super::*;
  use anyhow::Result;
  use futures::StreamExt;

  #[tokio::test]
  async fn test_basic() -> Result<()> {
    async fn takes_any(mut stream: impl Flux<u32, u32>) -> Vec<u32> {
      let mut acc = vec![];
      while let Some(Ok(v)) = stream.next().await {
        acc.push(v);
      }
      acc
    }
    let flux = FluxChannel::<u32, u32>::new();
    flux.send(1)?;
    flux.send(2)?;
    flux.send(3)?;
    flux.send(4)?;
    flux.complete();

    println!("waiting for flux results");
    let results = takes_any(flux).await;
    assert_eq!(results, vec![1, 2, 3, 4]);

    let mono = Mono::<u32, u32>::from_future(async move { Ok(42) });
    println!("waiting for mono results");
    let results = takes_any(mono).await;
    assert_eq!(results, vec![42]);
    Ok(())
  }
}