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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#include "stdafx.h"
#include "Reader.h"
#include "Engine.h"
#include "Exception.h"
#include "SStr.h"
#include "Rule.h"
#include "Production.h"
#include "Core/Str.h"
namespace storm {
namespace syntax {
// Find the syntax package for BNF given a type in 'lang.bnf'.
static Package *syntaxPkg(RootObject *o) {
Type *t = runtime::typeOf(o);
Package *p = as<Package>(t->parent());
assert(p);
return p;
}
static storm::FileReader *CODECALL createFile(FileInfo *info) {
return new (info) UseReader(info);
}
PkgReader *reader(Array<Url *> *files, Package *pkg) {
Engine &e = pkg->engine();
return new (e) FilePkgReader(files, pkg, fnPtr(e, &createFile, Compiler::thread(e)));
}
/**
* UseReader.
*/
UseReader::UseReader(FileInfo *info) : FileReader(info) {}
syntax::InfoParser *UseReader::createParser() {
syntax::Rule *r = as<syntax::Rule>(syntaxPkg(this)->find(S("SUse"), Scope()));
if (!r)
throw new (this) LangDefError(S("Can not find the 'SUse' rule."));
return new (this) syntax::InfoParser(r);
}
FileReader *UseReader::createNext(ReaderQuery q) {
Package *grammar = syntaxPkg(this);
// If we're trying to parse our grammar, use the simple C parser. If the language
// server wants information, use the full-blown solution instead!
if (grammar == info->pkg && !(q & qParser)) {
return new (this) DeclReader(info->next(info->contents->begin()));
}
syntax::Parser *p = syntax::Parser::create(grammar, S("SUse"));
if (!p->parse(info->contents, info->url, info->start))
p->throwError();
Array<SrcName *> *included = p->transform<Array<SrcName *>>();
return new (this) DeclReader(info->next(p->matchEnd()), included);
}
/**
* DeclReader.
*/
DeclReader::DeclReader(FileInfo *info, Array<SrcName *> *use) : FileReader(info), c(null), syntax(use) {}
DeclReader::DeclReader(FileInfo *info) : FileReader(info), c(null), syntax(new (engine()) Array<SrcName *>()) {}
void DeclReader::readSyntaxRules() {
ensureLoaded();
Package *pkg = info->pkg;
for (Nat i = 0; i < c->rules->count(); i++) {
RuleDecl *decl = c->rules->at(i);
pkg->add(decl->create(scope));
}
}
void DeclReader::readSyntaxProductions() {
ensureLoaded();
Package *pkg = info->pkg;
Delimiters *delimiters = c->delimiters(scope);
for (Nat i = 0; i < c->productions->count(); i++) {
ProductionDecl *decl = c->productions->at(i);
pkg->add(decl->create(pkg, delimiters, scope));
}
}
syntax::InfoParser *DeclReader::createParser() {
syntax::Rule *r = as<syntax::Rule>(syntaxPkg(this)->find(S("SRoot"), Scope() /* god mode! */));
if (!r)
throw new (this) LangDefError(S("Can not find the 'SRoot' rule."));
// Add additional syntax!
syntax::InfoParser *p = new (this) syntax::InfoParser(r);
add(p, syntax);
return p;
}
void DeclReader::ensureLoaded() {
if (c)
return;
Package *grammar = syntaxPkg(this);
if (grammar == info->pkg) {
// We're currently parsing lang.bnf. Use the parser written in C...
c = parseSyntax(info->contents, info->url, info->start);
} else {
// Use the 'real' parser!
Parser *p = Parser::create(grammar, S("SRoot"));
// Add syntax from the previous step.
add(p, syntax);
// Parse!
p->parse(info->contents, info->url, info->start);
if (p->hasError())
p->throwError();
c = p->transform<FileContents>();
}
// Add any newly found use statements.
SyntaxLookup *lookup = new (this) SyntaxLookup();
add(lookup, c->use);
scope = Scope(info->pkg, lookup);
}
void DeclReader::add(SyntaxLookup *to, Array<SrcName *> *use) {
Scope root = engine().scope();
for (Nat i = 0; i < use->count(); i++) {
SrcName *name = use->at(i);
Named *found = root.find(name);
if (!found)
throw new (this) SyntaxError(name->pos,
TO_S(this, S("The package ") << name << S(" does not exist!")));
to->addExtra(found);
}
}
void DeclReader::add(syntax::ParserBase *to, Array<SrcName *> *use) {
Scope root = engine().scope();
for (Nat i = 0; i < use->count(); i++) {
SrcName *name = use->at(i);
Package *found = as<Package>(root.find(name));
if (!found)
throw new (this) SyntaxError(name->pos,
TO_S(this, S("The package ") << name << S(" does not exist!")));
to->addSyntax(found);
}
}
SyntaxLookup::SyntaxLookup() : ScopeExtra(new (engine()) Str(S("void"))) {}
ScopeLookup *SyntaxLookup::clone() const {
SyntaxLookup *copy = new (this) SyntaxLookup();
Array<NameLookup *> *extra = this->extra();
for (Nat i = 0; i < extra->count(); i++)
copy->addExtra(extra->at(i), false);
return copy;
}
Named *SyntaxLookup::find(Scope in, SimpleName *name) {
// Note: In contrast to the lookup in Basic Storm, the syntax language does not really
// have local scope, and therefore we don't have to worry about local variables clashing
// with functions to the same extent. It is also nearly always clear what is a variable
// and what is a function.
if (name->count() == 1) {
for (SimplePart *last = name->last(); last; last = last->nextOption()) {
if (last->params->empty()) {
if (*last->name == S("SStr"))
return SStr::stormType(engine());
continue;
}
Value firstParam = last->params->at(0);
if (!firstParam.type)
continue;
if (Named *r = firstParam.type->find(last, in))
return r;
}
}
return ScopeExtra::find(in, name);
}
}
}
|
