Mercurial > projects > dil
annotate trunk/src/dil/LexerFuncs.d @ 494:9a7ca8c56e59
Refactored a few things in the Parser.
Removed unnecessary 'bool hasBody' parameter from some declarations.
Added shebang to list of tokens in Lexer unittest.
Added some semantic methods.
author | Aziz K?ksal <aziz.koeksal@gmail.com> |
---|---|
date | Fri, 07 Dec 2007 18:22:35 +0100 |
parents | 47be6bfe39cd |
children | 5a607597dc22 |
rev | line source |
---|---|
490
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
1 /++ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
2 Author: Aziz Köksal |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
3 License: GPL3 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
4 +/ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
5 module dil.LexerFuncs; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
6 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
7 const char[3] LS = \u2028; /// Line separator. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
8 const char[3] PS = \u2029; /// Paragraph separator. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
9 const dchar LSd = 0x2028; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
10 const dchar PSd = 0x2029; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
11 static assert(LS[0] == PS[0] && LS[1] == PS[1]); |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
12 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
13 const uint _Z_ = 26; /// Control+Z |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
14 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
15 /// Returns true if d is a Unicode line or paragraph separator. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
16 bool isUnicodeNewlineChar(dchar d) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
17 { |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
18 return d == LSd || d == PSd; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
19 } |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
20 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
21 /// Returns true if p points to a line or paragraph separator. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
22 bool isUnicodeNewline(char* p) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
23 { |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
24 return *p == LS[0] && p[1] == LS[1] && (p[2] == LS[2] || p[2] == PS[2]); |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
25 } |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
26 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
27 /++ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
28 Returns true if p points to the start of a Newline. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
29 Newline: \n | \r | \r\n | LS | PS |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
30 +/ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
31 bool isNewline(char* p) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
32 { |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
33 return *p == '\n' || *p == '\r' || isUnicodeNewline(p); |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
34 } |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
35 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
36 /++ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
37 Returns true if p points to the first character of an EndOfLine. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
38 EndOfLine: Newline | 0 | _Z_ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
39 +/ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
40 bool isEndOfLine(char* p) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
41 { |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
42 return isNewline(p) || *p == 0 || *p == _Z_; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
43 } |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
44 |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
45 /++ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
46 Scans a Newline and sets p one character past it. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
47 Returns '\n' if scanned or 0 otherwise. |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
48 +/ |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
49 dchar scanNewline(ref char* p) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
50 { |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
51 switch (*p) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
52 { |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
53 case '\r': |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
54 if (p[1] == '\n') |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
55 ++p; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
56 case '\n': |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
57 ++p; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
58 return '\n'; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
59 default: |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
60 if (isUnicodeNewline(p)) |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
61 { |
494
9a7ca8c56e59
Refactored a few things in the Parser.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
490
diff
changeset
|
62 p += 3; |
490
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
63 return '\n'; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
64 } |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
65 } |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
66 return 0; |
47be6bfe39cd
Refactored code and added new modules.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents:
diff
changeset
|
67 } |