forked from EvilBeaver/OneScript
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathModuleCompilerContext.cs
More file actions
164 lines (132 loc) · 4.19 KB
/
ModuleCompilerContext.cs
File metadata and controls
164 lines (132 loc) · 4.19 KB
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*----------------------------------------------------------
This Source Code Form is subject to the terms of the
Mozilla Public License, v.2.0. If a copy of the MPL
was not distributed with this file, You can obtain one
at http://mozilla.org/MPL/2.0/.
----------------------------------------------------------*/
using ScriptEngine.Machine;
namespace ScriptEngine.Compiler
{
class ModuleCompilerContext : ICompilerContext
{
private readonly CompilerContext _outerCtx;
private readonly CompilerContext _moduleCtx;
private int OUTER_CTX_SIZE;
private int _localScopesCount = 0;
public ModuleCompilerContext(CompilerContext outerContext)
{
_outerCtx = outerContext;
_moduleCtx = new CompilerContext();
Update();
}
#region ICompilerContext Members
public SymbolBinding DefineMethod(MethodInfo method)
{
var sb = _moduleCtx.DefineMethod(method);
ShiftIndex(ref sb);
return sb;
}
public SymbolBinding DefineProperty(string name, string alias = null)
{
var sb = _moduleCtx.DefineProperty(name, alias);
ShiftIndex(ref sb);
return sb;
}
public SymbolBinding DefineVariable(string name, string alias = null)
{
var sb = _moduleCtx.DefineVariable(name, alias);
ShiftIndex(ref sb);
return sb;
}
public SymbolBinding GetMethod(string name)
{
if(!_moduleCtx.TryGetMethod(name, out var sb))
return _outerCtx.GetMethod(name);
ShiftIndex(ref sb);
return sb;
}
public bool TryGetMethod(string name, out SymbolBinding binding)
{
if (!_moduleCtx.TryGetMethod(name, out binding))
return _outerCtx.TryGetMethod(name, out binding);
ShiftIndex(ref binding);
return true;
}
public SymbolScope GetScope(int scopeIndex)
{
if (scopeIndex < OUTER_CTX_SIZE)
{
return _outerCtx.GetScope(scopeIndex);
}
else
{
return _moduleCtx.GetScope(scopeIndex - OUTER_CTX_SIZE);
}
}
public VariableBinding GetVariable(string name)
{
if (!_moduleCtx.TryGetVariable(name, out var vb))
return _outerCtx.GetVariable(name);
ShiftIndex(ref vb.binding);
return vb;
}
public bool TryGetVariable(string name, out VariableBinding binding)
{
if (!_moduleCtx.TryGetVariable(name, out binding))
return _outerCtx.TryGetVariable(name, out binding);
ShiftIndex(ref binding.binding);
return true;
}
public SymbolScope Peek()
{
if (_localScopesCount > 0)
return _moduleCtx.Peek();
else
return _outerCtx.Peek();
}
public SymbolScope PopScope()
{
var scope = _moduleCtx.PopScope();
_localScopesCount--;
return scope;
}
public void PushScope(SymbolScope scope)
{
_moduleCtx.PushScope(scope);
_localScopesCount++;
}
public int ScopeIndex(SymbolScope scope)
{
int idx = _moduleCtx.ScopeIndex(scope);
if (idx >= 0)
{
return idx + OUTER_CTX_SIZE;
}
else
{
idx = _outerCtx.ScopeIndex(scope);
}
return idx;
}
public int TopIndex()
{
if (_localScopesCount > 0)
{
return _moduleCtx.TopIndex() + OUTER_CTX_SIZE;
}
else
{
return _outerCtx.TopIndex();
}
}
#endregion
private void ShiftIndex(ref SymbolBinding symbolBinding)
{
symbolBinding.ContextIndex += OUTER_CTX_SIZE;
}
internal void Update()
{
OUTER_CTX_SIZE = _outerCtx.TopIndex() + 1;
}
}
}