aboutsummaryrefslogtreecommitdiff
path: root/crates/ra_hir_expand/src/name.rs
blob: c3f7e77a5ae1b383ad11ee8da104351d50bb057e (plain)
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
//! FIXME: write short doc here

use std::fmt;

use ra_syntax::{ast, SmolStr};

/// `Name` is a wrapper around string, which is used in hir for both references
/// and declarations. In theory, names should also carry hygiene info, but we are
/// not there yet!
#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub struct Name(Repr);

#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
enum Repr {
    Text(SmolStr),
    TupleField(usize),
}

impl fmt::Display for Name {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match &self.0 {
            Repr::Text(text) => fmt::Display::fmt(&text, f),
            Repr::TupleField(idx) => fmt::Display::fmt(&idx, f),
        }
    }
}

impl Name {
    /// Note: this is private to make creating name from random string hard.
    /// Hopefully, this should allow us to integrate hygiene cleaner in the
    /// future, and to switch to interned representation of names.
    const fn new_text(text: SmolStr) -> Name {
        Name(Repr::Text(text))
    }

    pub fn new_tuple_field(idx: usize) -> Name {
        Name(Repr::TupleField(idx))
    }

    /// Shortcut to create inline plain text name
    const fn new_inline_ascii(len: usize, text: &[u8]) -> Name {
        Name::new_text(SmolStr::new_inline_from_ascii(len, text))
    }

    /// Resolve a name from the text of token.
    fn resolve(raw_text: &SmolStr) -> Name {
        let raw_start = "r#";
        if raw_text.as_str().starts_with(raw_start) {
            Name::new_text(SmolStr::new(&raw_text[raw_start.len()..]))
        } else {
            Name::new_text(raw_text.clone())
        }
    }

    pub fn missing() -> Name {
        Name::new_text("[missing name]".into())
    }

    pub fn as_tuple_index(&self) -> Option<usize> {
        match self.0 {
            Repr::TupleField(idx) => Some(idx),
            _ => None,
        }
    }
}

pub trait AsName {
    fn as_name(&self) -> Name;
}

impl AsName for ast::NameRef {
    fn as_name(&self) -> Name {
        match self.as_tuple_field() {
            Some(idx) => Name::new_tuple_field(idx),
            None => Name::resolve(self.text()),
        }
    }
}

impl AsName for ast::Name {
    fn as_name(&self) -> Name {
        Name::resolve(self.text())
    }
}

impl AsName for ast::FieldKind {
    fn as_name(&self) -> Name {
        match self {
            ast::FieldKind::Name(nr) => nr.as_name(),
            ast::FieldKind::Index(idx) => Name::new_tuple_field(idx.text().parse().unwrap()),
        }
    }
}

impl AsName for ra_db::Dependency {
    fn as_name(&self) -> Name {
        Name::new_text(self.name.clone())
    }
}

// Primitives
pub const ISIZE: Name = Name::new_inline_ascii(5, b"isize");
pub const I8: Name = Name::new_inline_ascii(2, b"i8");
pub const I16: Name = Name::new_inline_ascii(3, b"i16");
pub const I32: Name = Name::new_inline_ascii(3, b"i32");
pub const I64: Name = Name::new_inline_ascii(3, b"i64");
pub const I128: Name = Name::new_inline_ascii(4, b"i128");
pub const USIZE: Name = Name::new_inline_ascii(5, b"usize");
pub const U8: Name = Name::new_inline_ascii(2, b"u8");
pub const U16: Name = Name::new_inline_ascii(3, b"u16");
pub const U32: Name = Name::new_inline_ascii(3, b"u32");
pub const U64: Name = Name::new_inline_ascii(3, b"u64");
pub const U128: Name = Name::new_inline_ascii(4, b"u128");
pub const F32: Name = Name::new_inline_ascii(3, b"f32");
pub const F64: Name = Name::new_inline_ascii(3, b"f64");
pub const BOOL: Name = Name::new_inline_ascii(4, b"bool");
pub const CHAR: Name = Name::new_inline_ascii(4, b"char");
pub const STR: Name = Name::new_inline_ascii(3, b"str");

// Special names
pub const SELF_PARAM: Name = Name::new_inline_ascii(4, b"self");
pub const SELF_TYPE: Name = Name::new_inline_ascii(4, b"Self");
pub const MACRO_RULES: Name = Name::new_inline_ascii(11, b"macro_rules");

// Components of known path (value or mod name)
pub const STD: Name = Name::new_inline_ascii(3, b"std");
pub const ITER: Name = Name::new_inline_ascii(4, b"iter");
pub const OPS: Name = Name::new_inline_ascii(3, b"ops");
pub const FUTURE: Name = Name::new_inline_ascii(6, b"future");
pub const RESULT: Name = Name::new_inline_ascii(6, b"result");
pub const BOXED: Name = Name::new_inline_ascii(5, b"boxed");

// Components of known path (type name)
pub const INTO_ITERATOR_TYPE: Name = Name::new_inline_ascii(12, b"IntoIterator");
pub const ITEM_TYPE: Name = Name::new_inline_ascii(4, b"Item");
pub const TRY_TYPE: Name = Name::new_inline_ascii(3, b"Try");
pub const OK_TYPE: Name = Name::new_inline_ascii(2, b"Ok");
pub const FUTURE_TYPE: Name = Name::new_inline_ascii(6, b"Future");
pub const RESULT_TYPE: Name = Name::new_inline_ascii(6, b"Result");
pub const OUTPUT_TYPE: Name = Name::new_inline_ascii(6, b"Output");
pub const TARGET_TYPE: Name = Name::new_inline_ascii(6, b"Target");
pub const BOX_TYPE: Name = Name::new_inline_ascii(3, b"Box");

// Builtin Macros
pub const LINE_MACRO: Name = Name::new_inline_ascii(4, b"line");
pub const STRINGIFY_MACRO: Name = Name::new_inline_ascii(9, b"stringify");