blob: 1c5ff53c89a5238de2161806f6597d7d7f3a05a1 (
plain) (
blame)
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
|
#include <cstdio>
#include <sstream>
#include "directives.h" // IWYU pragma: keep
#include "scanner.h" // IWYU pragma: keep
#include "singledocparser.h"
#include "token.h"
#include "yaml-cpp/exceptions.h" // IWYU pragma: keep
#include "yaml-cpp/parser.h"
namespace YAML {
class EventHandler;
Parser::Parser() {}
Parser::Parser(std::istream& in) { Load(in); }
Parser::~Parser() {}
Parser::operator bool() const {
return m_pScanner.get() && !m_pScanner->empty();
}
void Parser::Load(std::istream& in) {
m_pScanner.reset(new Scanner(in));
m_pDirectives.reset(new Directives);
}
bool Parser::HandleNextDocument(EventHandler& eventHandler) {
if (!m_pScanner.get())
return false;
ParseDirectives();
if (m_pScanner->empty()) {
return false;
}
SingleDocParser sdp(*m_pScanner, *m_pDirectives);
sdp.HandleDocument(eventHandler);
return true;
}
void Parser::ParseDirectives() {
bool readDirective = false;
while (1) {
if (m_pScanner->empty()) {
break;
}
Token& token = m_pScanner->peek();
if (token.type != Token::DIRECTIVE) {
break;
}
// we keep the directives from the last document if none are specified;
// but if any directives are specific, then we reset them
if (!readDirective) {
m_pDirectives.reset(new Directives);
}
readDirective = true;
HandleDirective(token);
m_pScanner->pop();
}
}
void Parser::HandleDirective(const Token& token) {
if (token.value == "YAML") {
HandleYamlDirective(token);
} else if (token.value == "TAG") {
HandleTagDirective(token);
}
}
void Parser::HandleYamlDirective(const Token& token) {
if (token.params.size() != 1) {
throw ParserException(token.mark, ErrorMsg::YAML_DIRECTIVE_ARGS);
}
if (!m_pDirectives->version.isDefault) {
throw ParserException(token.mark, ErrorMsg::REPEATED_YAML_DIRECTIVE);
}
std::stringstream str(token.params[0]);
str >> m_pDirectives->version.major;
str.get();
str >> m_pDirectives->version.minor;
if (!str || str.peek() != EOF) {
throw ParserException(
token.mark, std::string(ErrorMsg::YAML_VERSION) + token.params[0]);
}
if (m_pDirectives->version.major > 1) {
throw ParserException(token.mark, ErrorMsg::YAML_MAJOR_VERSION);
}
m_pDirectives->version.isDefault = false;
// TODO: warning on major == 1, minor > 2?
}
void Parser::HandleTagDirective(const Token& token) {
if (token.params.size() != 2)
throw ParserException(token.mark, ErrorMsg::TAG_DIRECTIVE_ARGS);
const std::string& handle = token.params[0];
const std::string& prefix = token.params[1];
if (m_pDirectives->tags.find(handle) != m_pDirectives->tags.end()) {
throw ParserException(token.mark, ErrorMsg::REPEATED_TAG_DIRECTIVE);
}
m_pDirectives->tags[handle] = prefix;
}
void Parser::PrintTokens(std::ostream& out) {
if (!m_pScanner.get()) {
return;
}
while (1) {
if (m_pScanner->empty()) {
break;
}
out << m_pScanner->peek() << "\n";
m_pScanner->pop();
}
}
}
|
