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
|
#pragma once
#include <exception>
#include <string>
#include <vector>
#include <fmt/format.h>
#include <pog/rule.h>
#include <pog/symbol.h>
namespace pog {
class Error : public std::exception
{
public:
Error() : _msg() {}
template <typename T>
Error(T&& msg) noexcept : _msg(std::forward<T>(msg)) {}
Error(const Error& o) noexcept : _msg(o._msg) {}
virtual ~Error() noexcept {}
virtual const char* what() const noexcept override { return _msg.c_str(); }
protected:
std::string _msg;
};
class SyntaxError : public Error
{
public:
template <typename T>
SyntaxError(const Symbol<T>* unexpected_symbol, const std::vector<const Symbol<T>*>& expected_symbols) : Error()
{
std::vector<std::string> expected_symbols_str(expected_symbols.size());
std::transform(expected_symbols.begin(), expected_symbols.end(), expected_symbols_str.begin(), [](const auto& sym) {
return sym->get_description();
});
_msg = fmt::format(
"Syntax error: Unexpected {}, expected one of {}",
unexpected_symbol->get_description(),
fmt::join(expected_symbols_str.begin(), expected_symbols_str.end(), ", ")
);
}
template <typename T>
SyntaxError(const std::vector<const Symbol<T>*>& expected_symbols) : Error()
{
std::vector<std::string> expected_symbols_str(expected_symbols.size());
std::transform(expected_symbols.begin(), expected_symbols.end(), expected_symbols_str.begin(), [](const auto& sym) {
return sym->get_description();
});
_msg = fmt::format(
"Syntax error: Unknown symbol on input, expected one of {}",
fmt::join(expected_symbols_str.begin(), expected_symbols_str.end(), ", ")
);
}
};
} // namespace pog
|
