ryo-mutations 0.1.0

[experimental] Code transformation primitives for Rust source code
Documentation 
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

//! Struct mutations: AddStructMutation, RemoveStructMutation

use ryo_symbol::SymbolId;

use crate::Mutation;

/// Field definition for AddStructMutation
#[derive(Debug, Clone)]
pub struct StructFieldDef {
    pub name: String,
    pub ty: String,
    pub is_pub: bool,
}

impl StructFieldDef {
    pub fn new(name: impl Into<String>, ty: impl Into<String>) -> Self {
        Self {
            name: name.into(),
            ty: ty.into(),
            is_pub: false,
        }
    }

    pub fn public(mut self) -> Self {
        self.is_pub = true;
        self
    }
}

/// Add a new struct to the file
#[derive(Debug, Clone)]
pub struct AddStructMutation {
    /// Parent module SymbolId where the struct should be added
    pub parent: SymbolId,
    pub name: String,
    pub fields: Vec<StructFieldDef>,
    pub is_pub: bool,
    pub derives: Vec<String>,
}

impl AddStructMutation {
    pub fn new(parent: SymbolId, name: impl Into<String>) -> Self {
        Self {
            parent,
            name: name.into(),
            fields: Vec::new(),
            is_pub: false,
            derives: Vec::new(),
        }
    }

    pub fn with_field(mut self, name: impl Into<String>, ty: impl Into<String>) -> Self {
        self.fields.push(StructFieldDef::new(name, ty));
        self
    }

    /// Add a public field
    pub fn with_pub_field(mut self, name: impl Into<String>, ty: impl Into<String>) -> Self {
        self.fields.push(StructFieldDef::new(name, ty).public());
        self
    }

    /// Add fields from (name, type) tuples - all private (legacy compatibility)
    pub fn with_fields(mut self, fields: Vec<(String, String)>) -> Self {
        self.fields = fields
            .into_iter()
            .map(|(name, ty)| StructFieldDef::new(name, ty))
            .collect();
        self
    }

    /// Add fields with visibility information
    pub fn with_fields_vis(mut self, fields: Vec<(String, String, bool)>) -> Self {
        self.fields = fields
            .into_iter()
            .map(|(name, ty, is_pub)| {
                let mut f = StructFieldDef::new(name, ty);
                if is_pub {
                    f = f.public();
                }
                f
            })
            .collect();
        self
    }

    pub fn public(mut self) -> Self {
        self.is_pub = true;
        self
    }

    pub fn with_derives(mut self, derives: Vec<String>) -> Self {
        self.derives = derives;
        self
    }
}

impl Mutation for AddStructMutation {
    fn describe(&self) -> String {
        let vis = if self.is_pub { "pub " } else { "" };
        let fields: Vec<_> = self
            .fields
            .iter()
            .map(|f| {
                let field_vis = if f.is_pub { "pub " } else { "" };
                format!("{}{}: {}", field_vis, f.name, f.ty)
            })
            .collect();
        format!(
            "Add {}struct {} {{ {} }} to {}",
            vis,
            self.name,
            fields.join(", "),
            self.parent
        )
    }

    fn mutation_type(&self) -> &'static str {
        "AddStruct"
    }

    fn box_clone(&self) -> Box<dyn Mutation> {
        Box::new(self.clone())
    }
}

/// Remove a struct from the file
#[derive(Debug, Clone)]
pub struct RemoveStructMutation {
    /// SymbolId of the struct to remove (required, O(1) access)
    pub struct_id: SymbolId,
}

impl RemoveStructMutation {
    pub fn new(struct_id: SymbolId) -> Self {
        Self { struct_id }
    }
}

impl Mutation for RemoveStructMutation {
    fn describe(&self) -> String {
        format!("Remove struct {}", self.struct_id)
    }

    fn mutation_type(&self) -> &'static str {
        "RemoveStruct"
    }

    fn box_clone(&self) -> Box<dyn Mutation> {
        Box::new(self.clone())
    }
}