emmylua_code_analysis/semantic/semantic_info/
mod.rs

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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
mod infer_expr_property_owner;

use emmylua_parser::{
    LuaAstNode, LuaAstToken, LuaDocNameType, LuaDocTag, LuaExpr, LuaLocalName, LuaSyntaxKind, LuaSyntaxNode, LuaSyntaxToken, LuaTableField
};
use infer_expr_property_owner::infer_expr_property_owner;

use crate::{DbIndex, LuaDeclExtra, LuaDeclId, LuaMemberId, LuaPropertyOwnerId, LuaType};

use super::{infer_expr, LuaInferConfig};

#[derive(Debug, Clone, PartialEq)]
pub struct SemanticInfo {
    pub typ: LuaType,
    pub property_owner: Option<LuaPropertyOwnerId>,
}

pub fn infer_token_semantic_info(
    db: &DbIndex,
    infer_config: &mut LuaInferConfig,
    token: LuaSyntaxToken,
) -> Option<SemanticInfo> {
    let parent = token.parent()?;
    match parent.kind().into() {
        LuaSyntaxKind::ForStat | LuaSyntaxKind::ForRangeStat | LuaSyntaxKind::LocalName => {
            let file_id = infer_config.get_file_id();
            let decl_id = LuaDeclId::new(file_id, token.text_range().start());
            let decl = db.get_decl_index().get_decl(&decl_id)?;
            let typ = decl.get_type().cloned().unwrap_or(LuaType::Unknown);
            Some(SemanticInfo {
                typ,
                property_owner: Some(LuaPropertyOwnerId::LuaDecl(decl_id)),
            })
        }
        LuaSyntaxKind::ParamName => {
            let file_id = infer_config.get_file_id();
            let decl_id = LuaDeclId::new(file_id, token.text_range().start());
            let decl = db.get_decl_index().get_decl(&decl_id)?;
            match &decl.extra {
                LuaDeclExtra::Param { idx, signature_id } => {
                    let signature = db.get_signature_index().get(&signature_id)?;
                    let param_info = signature.get_param_info_by_id(*idx)?;
                    let mut typ = param_info.type_ref.clone();
                    if param_info.nullable && !typ.is_nullable() {
                        typ = LuaType::Nullable(typ.into());
                    }

                    Some(SemanticInfo {
                        typ,
                        property_owner: Some(LuaPropertyOwnerId::LuaDecl(decl_id)),
                    })
                }
                _ => None,
            }
        }
        _ => infer_node_semantic_info(db, infer_config, parent),
    }
}

pub fn infer_node_semantic_info(
    db: &DbIndex,
    infer_config: &mut LuaInferConfig,
    node: LuaSyntaxNode,
) -> Option<SemanticInfo> {
    match node {
        expr_node if LuaExpr::can_cast(expr_node.kind().into()) => {
            let expr = LuaExpr::cast(expr_node)?;
            let typ = infer_expr(db, infer_config, expr.clone()).unwrap_or(LuaType::Unknown);
            let property_owner = infer_expr_property_owner(db, infer_config, expr);
            Some(SemanticInfo {
                typ,
                property_owner,
            })
        }
        table_field_node if LuaTableField::can_cast(table_field_node.kind().into()) => {
            let table_field = LuaTableField::cast(table_field_node)?;
            let member_id =
                LuaMemberId::new(table_field.get_syntax_id(), infer_config.get_file_id());
            let member = db.get_member_index().get_member(&member_id)?;
            let typ = member.get_decl_type().clone();
            Some(SemanticInfo {
                typ,
                property_owner: Some(LuaPropertyOwnerId::Member(member_id)),
            })
        }
        name_type if LuaDocNameType::can_cast(name_type.kind().into()) => {
            let name_type = LuaDocNameType::cast(name_type)?;
            let name = name_type.get_name_text()?;
            let type_decl = db
                .get_type_index()
                .find_type_decl(infer_config.get_file_id(), &name)?;
            Some(SemanticInfo {
                typ: LuaType::Ref(type_decl.get_id()),
                property_owner: LuaPropertyOwnerId::TypeDecl(type_decl.get_id()).into(),
            })
        }
        tags if LuaDocTag::can_cast(tags.kind().into()) => {
            let tag = LuaDocTag::cast(tags)?;
            match tag {
                LuaDocTag::Alias(alias) => {
                    type_def_tag_info(alias.get_name_token()?.get_name_text(), db, infer_config)
                }
                LuaDocTag::Class(class) => {
                    type_def_tag_info(class.get_name_token()?.get_name_text(), db, infer_config)
                }
                LuaDocTag::Enum(enum_) => {
                    type_def_tag_info(enum_.get_name_token()?.get_name_text(), db, infer_config)
                }
                LuaDocTag::Field(field) => {
                    let member_id =
                        LuaMemberId::new(field.get_syntax_id(), infer_config.get_file_id());
                    let member = db.get_member_index().get_member(&member_id)?;
                    let typ = member.get_decl_type();
                    Some(SemanticInfo {
                        typ: typ.clone(),
                        property_owner: Some(LuaPropertyOwnerId::Member(member_id)),
                    })
                }
                _ => return None,
            }
        }
        _ => None,
    }
}

fn type_def_tag_info(
    name: &str,
    db: &DbIndex,
    infer_config: &mut LuaInferConfig,
) -> Option<SemanticInfo> {
    let type_decl = db
        .get_type_index()
        .find_type_decl(infer_config.get_file_id(), name)?;
    Some(SemanticInfo {
        typ: LuaType::Ref(type_decl.get_id()),
        property_owner: LuaPropertyOwnerId::TypeDecl(type_decl.get_id()).into(),
    })
}

pub fn infer_token_property_owner(
    db: &DbIndex,
    infer_config: &mut LuaInferConfig,
    token: LuaSyntaxToken,
) -> Option<LuaPropertyOwnerId> {
    let parent = token.parent()?;
    match parent.kind().into() {
        LuaSyntaxKind::ForStat
        | LuaSyntaxKind::ForRangeStat
        | LuaSyntaxKind::LocalName
        | LuaSyntaxKind::ParamName => {
            let file_id = infer_config.get_file_id();
            let decl_id = LuaDeclId::new(file_id, token.text_range().start());
            Some(LuaPropertyOwnerId::LuaDecl(decl_id))
        }
        _ => infer_node_property_owner(db, infer_config, parent),
    }
}

pub fn infer_node_property_owner(
    db: &DbIndex,
    infer_config: &mut LuaInferConfig,
    node: LuaSyntaxNode,
) -> Option<LuaPropertyOwnerId> {
    match node {
        expr_node if LuaExpr::can_cast(expr_node.kind().into()) => {
            let expr = LuaExpr::cast(expr_node)?;
            infer_expr_property_owner(db, infer_config, expr)
        }
        table_field_node if LuaTableField::can_cast(table_field_node.kind().into()) => {
            let table_field = LuaTableField::cast(table_field_node)?;
            let member_id =
                LuaMemberId::new(table_field.get_syntax_id(), infer_config.get_file_id());
            Some(LuaPropertyOwnerId::Member(member_id))
        }
        name_type if LuaDocNameType::can_cast(name_type.kind().into()) => {
            let name_type = LuaDocNameType::cast(name_type)?;
            let name = name_type.get_name_text()?;
            let type_decl = db
                .get_type_index()
                .find_type_decl(infer_config.get_file_id(), &name)?;
            LuaPropertyOwnerId::TypeDecl(type_decl.get_id()).into()
        }
        tags if LuaDocTag::can_cast(tags.kind().into()) => {
            let tag = LuaDocTag::cast(tags)?;
            match tag {
                LuaDocTag::Alias(alias) => type_def_tag_property_owner(
                    alias.get_name_token()?.get_name_text(),
                    db,
                    infer_config,
                ),
                LuaDocTag::Class(class) => type_def_tag_property_owner(
                    class.get_name_token()?.get_name_text(),
                    db,
                    infer_config,
                ),
                LuaDocTag::Enum(enum_) => type_def_tag_property_owner(
                    enum_.get_name_token()?.get_name_text(),
                    db,
                    infer_config,
                ),
                LuaDocTag::Field(field) => {
                    let member_id =
                        LuaMemberId::new(field.get_syntax_id(), infer_config.get_file_id());
                    Some(LuaPropertyOwnerId::Member(member_id))
                }
                _ => return None,
            }
        }
        local_name if LuaLocalName::can_cast(local_name.kind().into()) => {
            let local_name = LuaLocalName::cast(local_name)?;
            let name_token = local_name.get_name_token()?;
            infer_token_property_owner(db, infer_config, name_token.syntax().clone())
        }
        _ => None,
    }
}

fn type_def_tag_property_owner(
    name: &str,
    db: &DbIndex,
    infer_config: &mut LuaInferConfig,
) -> Option<LuaPropertyOwnerId> {
    let type_decl = db
        .get_type_index()
        .find_type_decl(infer_config.get_file_id(), name)?;
    LuaPropertyOwnerId::TypeDecl(type_decl.get_id()).into()
}