blob: 6c8060cfd932c36b53b0757993703342c75aecc6 (
plain)
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
|
// slang-mangled-lexer.h
#ifndef SLANG_MANGLED_LEXER_H_INCLUDED
#define SLANG_MANGLED_LEXER_H_INCLUDED
#include "../core/slang-basic.h"
#include "slang-compiler.h"
namespace Slang
{
/* A lexer like utility class used for decoding mangled names.
Expects names to be correctly constructed - any errors will cause asserts/failures */
class MangledLexer
{
public:
/// Reads a count at current position
UInt readCount();
void readGenericParam();
void readGenericParams();
SLANG_INLINE void readSimpleIntVal();
UnownedStringSlice readRawStringSegment();
void readNamedType();
void readType();
void readVal();
void readGenericArg() { readVal(); }
void readGenericArgs();
SLANG_INLINE void readExtensionSpec();
UnownedStringSlice readSimpleName();
UInt readParamCount();
/// Ctor
SLANG_FORCE_INLINE MangledLexer(const UnownedStringSlice& slice);
private:
// Call at the beginning of a mangled name,
// to strip off the main prefix
void _start() { _expect("_S"); }
static bool _isDigit(char c) { return (c >= '0') && (c <= '9'); }
/// Returns the character at the current position
char _peek() { return *m_cursor; }
// Returns the current character and moves to next character.
char _next() { return *m_cursor++; }
SLANG_INLINE void _expect(char c);
void _expect(char const* str)
{
while (char c = *str++)
_expect(c);
}
char const* m_cursor = nullptr;
char const* m_begin = nullptr;
char const* m_end = nullptr;
};
// -------------------------------------------------------------------------- -
SLANG_FORCE_INLINE MangledLexer::MangledLexer(const UnownedStringSlice& slice)
: m_cursor(slice.begin())
, m_begin(slice.begin())
, m_end(slice.end())
{
_start();
}
// ---------------------------------------------------------------------------
SLANG_INLINE void MangledLexer::readSimpleIntVal()
{
int c = _peek();
if (_isDigit((char)c))
{
_next();
}
else
{
readVal();
}
}
// ---------------------------------------------------------------------------
SLANG_INLINE void MangledLexer::readNamedType()
{
// TODO: handle types with more complicated names
readRawStringSegment();
}
// ---------------------------------------------------------------------------
SLANG_INLINE void MangledLexer::readExtensionSpec()
{
_expect("X");
readType();
}
// ---------------------------------------------------------------------------
SLANG_INLINE void MangledLexer::_expect(char c)
{
if (_peek() == c)
{
_next();
}
else
{
// ERROR!
SLANG_UNEXPECTED("mangled name error");
}
}
}
#endif
|
