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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189

use crate::analysis::{AnalysedFunction, AnalysedType};
use std::borrow::Cow;
use std::fmt::Display;
use wasm_wave::wasm::{DisplayType, WasmFunc, WasmType, WasmTypeKind};

impl WasmType for AnalysedType {
    fn kind(&self) -> WasmTypeKind {
        match self {
            AnalysedType::Bool => WasmTypeKind::Bool,
            AnalysedType::S8 => WasmTypeKind::S8,
            AnalysedType::U8 => WasmTypeKind::U8,
            AnalysedType::S16 => WasmTypeKind::S16,
            AnalysedType::U16 => WasmTypeKind::U16,
            AnalysedType::S32 => WasmTypeKind::S32,
            AnalysedType::U32 => WasmTypeKind::U32,
            AnalysedType::S64 => WasmTypeKind::S64,
            AnalysedType::U64 => WasmTypeKind::U64,
            AnalysedType::F32 => WasmTypeKind::Float32,
            AnalysedType::F64 => WasmTypeKind::Float64,
            AnalysedType::Chr => WasmTypeKind::Char,
            AnalysedType::Str => WasmTypeKind::String,
            AnalysedType::List(_) => WasmTypeKind::List,
            AnalysedType::Tuple(_) => WasmTypeKind::Tuple,
            AnalysedType::Record(_) => WasmTypeKind::Record,
            AnalysedType::Flags(_) => WasmTypeKind::Flags,
            AnalysedType::Enum(_) => WasmTypeKind::Enum,
            AnalysedType::Option(_) => WasmTypeKind::Option,
            AnalysedType::Result { .. } => WasmTypeKind::Result,
            AnalysedType::Variant(_) => WasmTypeKind::Variant,
            AnalysedType::Resource { .. } => WasmTypeKind::Unsupported,
        }
    }

    fn list_element_type(&self) -> Option<Self> {
        if let AnalysedType::List(ty) = self {
            Some(*ty.clone())
        } else {
            None
        }
    }

    fn record_fields(&self) -> Box<dyn Iterator<Item = (Cow<str>, Self)> + '_> {
        if let AnalysedType::Record(fields) = self {
            Box::new(
                fields
                    .iter()
                    .map(|(name, ty)| (Cow::Borrowed(name.as_str()), ty.clone())),
            )
        } else {
            Box::new(std::iter::empty())
        }
    }

    fn tuple_element_types(&self) -> Box<dyn Iterator<Item = Self> + '_> {
        if let AnalysedType::Tuple(types) = self {
            Box::new(types.clone().into_iter())
        } else {
            Box::new(std::iter::empty())
        }
    }

    fn variant_cases(&self) -> Box<dyn Iterator<Item = (Cow<str>, Option<Self>)> + '_> {
        if let AnalysedType::Variant(cases) = self {
            Box::new(
                cases
                    .iter()
                    .map(|(name, ty)| (Cow::Borrowed(name.as_str()), ty.clone())),
            )
        } else {
            Box::new(std::iter::empty())
        }
    }

    fn enum_cases(&self) -> Box<dyn Iterator<Item = Cow<str>> + '_> {
        if let AnalysedType::Enum(cases) = self {
            Box::new(cases.iter().map(|name| Cow::Borrowed(name.as_str())))
        } else {
            Box::new(std::iter::empty())
        }
    }

    fn option_some_type(&self) -> Option<Self> {
        if let AnalysedType::Option(ty) = self {
            Some(*ty.clone())
        } else {
            None
        }
    }

    fn result_types(&self) -> Option<(Option<Self>, Option<Self>)> {
        if let AnalysedType::Result { ok, error } = self {
            Some((
                ok.as_ref().map(|t| *t.clone()),
                error.as_ref().map(|t| *t.clone()),
            ))
        } else {
            None
        }
    }

    fn flags_names(&self) -> Box<dyn Iterator<Item = Cow<str>> + '_> {
        if let AnalysedType::Flags(names) = self {
            Box::new(names.iter().map(|name| Cow::Borrowed(name.as_str())))
        } else {
            Box::new(std::iter::empty())
        }
    }
}

impl WasmFunc for AnalysedFunction {
    type Type = AnalysedType;

    fn params(&self) -> Box<dyn Iterator<Item = Self::Type> + '_> {
        Box::new(self.params.iter().map(|p| p.typ.clone()))
    }

    fn param_names(&self) -> Box<dyn Iterator<Item = Cow<str>> + '_> {
        Box::new(self.params.iter().map(|p| Cow::Borrowed(p.name.as_str())))
    }

    fn results(&self) -> Box<dyn Iterator<Item = Self::Type> + '_> {
        Box::new(self.results.iter().map(|r| r.typ.clone()))
    }

    fn result_names(&self) -> Box<dyn Iterator<Item = Cow<str>> + '_> {
        let names: Option<Vec<Cow<str>>> = self
            .results
            .iter()
            .map(|r| r.name.as_ref().map(|n| Cow::Borrowed(n.as_str())))
            .collect();

        match names {
            Some(names) => Box::new(names.into_iter()),
            None => Box::new(std::iter::empty()),
        }
    }
}

/// Copy of DisplayFunc with additional name filed.
/// DisplayFunc is always using func for name
pub struct DisplayNamedFunc<T: WasmFunc> {
    pub name: String,
    pub func: T,
}

impl<T: WasmFunc> Display for DisplayNamedFunc<T> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(&self.name)?;
        f.write_str("(")?;
        let mut param_names = self.func.param_names();
        for (idx, ty) in self.func.params().enumerate() {
            if idx != 0 {
                f.write_str(", ")?;
            }
            if let Some(name) = param_names.next() {
                write!(f, "{name}: ")?;
            }
            DisplayType(&ty).fmt(f)?
        }
        f.write_str(")")?;

        let results = self.func.results().collect::<Vec<_>>();
        if results.is_empty() {
            return Ok(());
        }

        let mut result_names = self.func.result_names();
        if results.len() == 1 {
            let ty = DisplayType(&results.into_iter().next().unwrap()).to_string();
            if let Some(name) = result_names.next() {
                write!(f, " -> ({name}: {ty})")
            } else {
                write!(f, " -> {ty}")
            }
        } else {
            f.write_str(" -> (")?;
            for (idx, ty) in results.into_iter().enumerate() {
                if idx != 0 {
                    f.write_str(", ")?;
                }
                if let Some(name) = result_names.next() {
                    write!(f, "{name}: ")?;
                }
                DisplayType(&ty).fmt(f)?;
            }
            f.write_str(")")
        }
    }
}