dmd.imphint source code

1 /**
2  * Give import hints for common symbol names that couldn't be resolved.
3  *
4  * For example, prompt to `import std.stdio` when using `writeln`.
5  *
6  * Copyright:   Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved
7  * Authors:     $(LINK2 http://www.digitalmars.com, Walter Bright)
8  * License:     $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
9  * Source:      $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/imphint.d, _imphint.d)
10  * Documentation:  https://dlang.org/phobos/dmd_imphint.html
11  * Coverage:    https://codecov.io/gh/dlang/dmd/src/master/src/dmd/imphint.d
12  */
13 
14 module dmd.imphint;
15 
16 /******************************************
17  * Looks for undefined identifier s to see
18  * if it might be undefined because an import
19  * was not specified.
20  * Not meant to be a comprehensive list of names in each module,
21  * just the most common ones.
22  */
23 const(char)[] importHint(const(char)[] s)
24 {
25     if (auto entry = s in hints)
26         return *entry;
27     return null;
28 }
29 
30 private immutable string[string] hints;
31 
32 shared static this()
33 {
34     // in alphabetic order
35     hints = [
36         "AliasSeq": "std.meta",
37         "appender": "std.array",
38         "array": "std.array",
39         "calloc": "core.stdc.stdlib",
40         "chdir": "std.file",
41         "cos": "std.math",
42         "dirEntries": "std.file",
43         "drop": "std.range",
44         "each": "std.algorithm",
45         "empty": "std.range",
46         "endsWith": "std.algorithm",
47         "enforce": "std.exception",
48         "enumerate": "std.range",
49         "equal": "std.algorithm",
50         "exists": "std.file",
51         "fabs": "std.math",
52         "filter": "std.algorithm",
53         "format": "std.format",
54         "free": "core.stdc.stdlib",
55         "front": "std.range",
56         "iota": "std.range",
57         "isDir": "std.file",
58         "isFile": "std.file",
59         "join": "std.array",
60         "joiner": "std.algorithm",
61         "malloc": "core.stdc.stdlib",
62         "map": "std.algorithm",
63         "max": "std.algorithm",
64         "min": "std.algorithm",
65         "mkdir": "std.file",
66         "popFront": "std.range",
67         "printf": "core.stdc.stdio",
68         "realloc": "core.stdc.stdlib",
69         "replace": "std.array",
70         "rmdir": "std.file",
71         "sin": "std.math",
72         "sort": "std.algorithm",
73         "split": "std.array",
74         "sqrt": "std.math",
75         "startsWith": "std.algorithm",
76         "take": "std.range",
77         "text": "std.conv",
78         "to": "std.conv",
79         "writefln": "std.stdio",
80         "writeln": "std.stdio",
81         "__va_argsave_t": "core.stdc.stdarg",
82         "__va_list_tag": "core.stdc.stdarg",
83     ];
84 }
85 
86 unittest
87 {
88     assert(importHint("printf") !is null);
89     assert(importHint("fabs") !is null);
90     assert(importHint("xxxxx") is null);
91 }