diff options
author | Aleksey Kladov <[email protected]> | 2019-11-27 14:46:02 +0000 |
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committer | Aleksey Kladov <[email protected]> | 2019-11-27 18:16:00 +0000 |
commit | a87579500a2c35597071efd0ad6983927f0c1815 (patch) | |
tree | 9805b3dcbf8d767b2fc0623f42794068f3660d44 /crates/ra_hir/src/ty/display.rs | |
parent | 368653081558ab389c6543d6b5027859e26beb3b (diff) |
Move Ty
Diffstat (limited to 'crates/ra_hir/src/ty/display.rs')
-rw-r--r-- | crates/ra_hir/src/ty/display.rs | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/crates/ra_hir/src/ty/display.rs b/crates/ra_hir/src/ty/display.rs deleted file mode 100644 index 9bb3ece6c..000000000 --- a/crates/ra_hir/src/ty/display.rs +++ /dev/null | |||
@@ -1,93 +0,0 @@ | |||
1 | //! FIXME: write short doc here | ||
2 | |||
3 | use std::fmt; | ||
4 | |||
5 | use crate::db::HirDatabase; | ||
6 | |||
7 | pub struct HirFormatter<'a, 'b, DB> { | ||
8 | pub db: &'a DB, | ||
9 | fmt: &'a mut fmt::Formatter<'b>, | ||
10 | buf: String, | ||
11 | curr_size: usize, | ||
12 | max_size: Option<usize>, | ||
13 | } | ||
14 | |||
15 | pub trait HirDisplay { | ||
16 | fn hir_fmt(&self, f: &mut HirFormatter<impl HirDatabase>) -> fmt::Result; | ||
17 | |||
18 | fn display<'a, DB>(&'a self, db: &'a DB) -> HirDisplayWrapper<'a, DB, Self> | ||
19 | where | ||
20 | Self: Sized, | ||
21 | { | ||
22 | HirDisplayWrapper(db, self, None) | ||
23 | } | ||
24 | |||
25 | fn display_truncated<'a, DB>( | ||
26 | &'a self, | ||
27 | db: &'a DB, | ||
28 | max_size: Option<usize>, | ||
29 | ) -> HirDisplayWrapper<'a, DB, Self> | ||
30 | where | ||
31 | Self: Sized, | ||
32 | { | ||
33 | HirDisplayWrapper(db, self, max_size) | ||
34 | } | ||
35 | } | ||
36 | |||
37 | impl<'a, 'b, DB> HirFormatter<'a, 'b, DB> | ||
38 | where | ||
39 | DB: HirDatabase, | ||
40 | { | ||
41 | pub fn write_joined<T: HirDisplay>( | ||
42 | &mut self, | ||
43 | iter: impl IntoIterator<Item = T>, | ||
44 | sep: &str, | ||
45 | ) -> fmt::Result { | ||
46 | let mut first = true; | ||
47 | for e in iter { | ||
48 | if !first { | ||
49 | write!(self, "{}", sep)?; | ||
50 | } | ||
51 | first = false; | ||
52 | e.hir_fmt(self)?; | ||
53 | } | ||
54 | Ok(()) | ||
55 | } | ||
56 | |||
57 | /// This allows using the `write!` macro directly with a `HirFormatter`. | ||
58 | pub fn write_fmt(&mut self, args: fmt::Arguments) -> fmt::Result { | ||
59 | // We write to a buffer first to track output size | ||
60 | self.buf.clear(); | ||
61 | fmt::write(&mut self.buf, args)?; | ||
62 | self.curr_size += self.buf.len(); | ||
63 | |||
64 | // Then we write to the internal formatter from the buffer | ||
65 | self.fmt.write_str(&self.buf) | ||
66 | } | ||
67 | |||
68 | pub fn should_truncate(&self) -> bool { | ||
69 | if let Some(max_size) = self.max_size { | ||
70 | self.curr_size >= max_size | ||
71 | } else { | ||
72 | false | ||
73 | } | ||
74 | } | ||
75 | } | ||
76 | |||
77 | pub struct HirDisplayWrapper<'a, DB, T>(&'a DB, &'a T, Option<usize>); | ||
78 | |||
79 | impl<'a, DB, T> fmt::Display for HirDisplayWrapper<'a, DB, T> | ||
80 | where | ||
81 | DB: HirDatabase, | ||
82 | T: HirDisplay, | ||
83 | { | ||
84 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | ||
85 | self.1.hir_fmt(&mut HirFormatter { | ||
86 | db: self.0, | ||
87 | fmt: f, | ||
88 | buf: String::with_capacity(20), | ||
89 | curr_size: 0, | ||
90 | max_size: self.2, | ||
91 | }) | ||
92 | } | ||
93 | } | ||