Mercurial > pub > ImplabNet

comparison Implab.ServiceHost/Unity/TypeReferenceParser.cs @ 267:6b3e5c48131b v3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Working on Unity xml configuration
author cin
date Fri, 20 Apr 2018 19:05:12 +0300
parents
children 0be8a6ae8307
comparison
equal deleted inserted replaced
266:254d1f255d87 267:6b3e5c48131b
1 using System;
2 using System.Collections.Generic;
3 using System.Text.RegularExpressions;
4
5 namespace Implab.ServiceHost.Unity {
6 public class TypeReferenceParser {
7 enum TokenType {
8 None,
9
10 Word,
11
12 Dot,
13
14 Comma,
15
16 OpenList,
17
18 CloseList,
19
20 Eof
21 }
22
23 readonly Regex _tokens = new Regex(@"(\w+)|\s*([\.{},])\s*");
24
25 TokenType m_token;
26
27 string m_tokenValue;
28
29 int m_pos;
30
31 readonly string m_text;
32
33 TokenType Token { get { return m_token; } }
34
35 string TokenValue { get { return m_tokenValue; } }
36
37 public TypeReferenceParser(string text) {
38 Safe.ArgumentNotEmpty(text, nameof(text));
39 m_text = text;
40 }
41
42 bool ReadToken() {
43 if (m_pos >= m_text.Length) {
44 m_token = TokenType.Eof;
45 m_tokenValue = null;
46 return false;
47 }
48
49 var m = _tokens.Match(m_text, m_pos);
50
51 if (m.Success) {
52 m_pos += m.Length;
53 if (m.Groups[1].Success) {
54 m_token = TokenType.Word;
55 m_tokenValue = m.Groups[1].Value;
56 } else if (m.Groups[2].Success) {
57 m_tokenValue = null;
58 switch (m.Groups[2].Value) {
59 case "{":
60 m_token = TokenType.OpenList;
61 break;
62 case "}":
63 m_token = TokenType.CloseList;
64 break;
65 case ".":
66 m_token = TokenType.Dot;
67 break;
68 case ",":
69 m_token = TokenType.Comma;
70 break;
71 }
72 }
73 return true;
74 }
75 throw new FormatException($"Failed to parse '{m_text}' at pos {m_pos}");
76 }
77
78 public TypeRerefence Pase() {
79
80 }
81
82 string[] ReadTypeName() {
83 var parts = new List<string>();
84
85 string current = null;
86 bool stop = false;
87 while ((!stop) && ReadToken()) {
88 switch (Token) {
89 case TokenType.Word:
90 if (current != null)
91 ThrowUnexpectedToken();
92 current = TokenValue;
93 break;
94 case TokenType.Dot:
95 if (current == null)
96 ThrowUnexpectedToken();
97 parts.Add(current);
98 current = null;
99 break;
100 default:
101 stop = true;
102 break;
103 }
104 }
105 if (current != null)
106 parts.Add(current);
107
108 if (parts.Count == 0)
109 return null;
110
111 return parts.ToArray();
112 }
113
114 TypeReference ReadTypeReference() {
115
116 var parts = ReadTypeName();
117 if (parts == null)
118 return null;
119
120 var typeReference = new TypeReference {
121 Namespace = string.Join(",", parts, 0, parts.Length - 1),
122 TypeName = parts[parts.Length - 1]
123 };
124
125 switch (Token) {
126 case TokenType.Eof:
127 break;
128 case TokenType.OpenList:
129 typeReference.GenericParameters = ReadTypeReferenceList();
130 if(Token != TokenType.CloseList)
131 ThrowUnexpectedToken();
132 break;
133 default:
134 ThrowUnexpectedToken();
135 break;
136 }
137
138 return typeReference;
139 }
140
141 TypeReference[] ReadTypeReferenceList() {
142 throw new NotImplementedException();
143 }
144
145 void ReadDot() {
146 if (!ReadToken() || Token != TokenType.Dot)
147 ThrowUnexpectedToken();
148 }
149
150 void ThrowUnexpectedToken() {
151 throw new FormatException($"Unexpected '{Token}' at {m_pos}");
152 }
153
154
155 }
156 }