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
|
/*****
* newexp.cc
* Andy Hammerlindl 2003/07/28
*
* Handles the abstract syntax for expressions the create new objects,
* such as record, array, and function constructors.
*****/
#include "newexp.h"
#include "stm.h"
#include "runtime.h"
#include "runarray.h"
#include "coenv.h"
#include "inst.h"
using namespace types;
using trans::coder;
using trans::coenv;
using vm::inst;
namespace absyntax {
void printFrame(frame *f) {
if (f == 0) {
cerr << '0';
}
else {
cerr << f << " of ";
printFrame(f->getParent());
}
}
void newRecordExp::prettyprint(ostream &out, Int indent) {
prettyname(out, "newRecordExp", indent, getPos());
}
bool newRecordExp::encodeLevel(position pos, coenv &e, trans::tyEntry *ent)
{
record *r = dynamic_cast<record *>(ent->t);
assert(r);
// The level needed on which to allocate the record.
frame *level = r->getLevel()->getParent();
if (ent->v) {
// Put the record on the stack. For instance, in code like
// access imp;
// new imp.t;
// we are putting the instance of imp on the stack, so we can use it to
// allocate an instance of imp.t.
ent->v->getLocation()->encode(trans::READ, pos, e.c);
// Adjust to the right frame. For instance, in the last new in
// struct A {
// struct B {
// static struct C {}
// }
// B b=new B;
// }
// A a=new A;
// new a.b.C;
// we push a.b onto the stack, but need a as the enclosing frame for
// allocating an instance of C.
record *q = dynamic_cast<record *>(ent->v->getType());
return e.c.encode(level, q->getLevel());
}
else
return e.c.encode(level);
}
types::ty *newRecordExp::transFromTyEntry(position pos, coenv &e,
trans::tyEntry *ent)
{
types::ty *t = ent->t;
if (t->kind == ty_error)
return t;
else if (t->kind != ty_record) {
em.error(pos);
em << "type '" << *t << "' is not a structure";
return primError();
}
// Put the enclosing frame on the stack.
if (!encodeLevel(pos, e, ent)) {
em.error(pos);
em << "allocation of struct '" << *t << "' is not in a valid scope";
return primError();
}
record *r = dynamic_cast<record *>(t);
assert(r);
// Encode the allocation.
e.c.encode(inst::makefunc,r->getInit());
e.c.encode(inst::popcall);
return t;
}
types::ty *newRecordExp::trans(coenv &e)
{
return transFromTyEntry(getPos(), e, result->transAsTyEntry(e, 0));
}
types::ty *newRecordExp::getType(coenv &e)
{
types::ty *t = result->trans(e, true);
if (t->kind != ty_error && t->kind != ty_record)
return primError();
else
return t;
}
void newArrayExp::prettyprint(ostream &out, Int indent)
{
prettyname(out,"newArrayExp",indent, getPos());
celltype->prettyprint(out, indent+1);
if (dimexps) dimexps->prettyprint(out, indent+1);
if (dims) dims->prettyprint(out, indent+1);
if (ai) ai->prettyprint(out, indent+1);
}
types::ty *newArrayExp::trans(coenv &e)
{
types::ty *c = celltype->trans(e);
if (c->kind == ty_void) {
em.error(getPos());
em << "cannot declare array of type void";
return primError();
}
if (dims)
c = dims->truetype(c);
if (ai) {
ai->transToType(e, c);
return c;
} else if (dimexps || dims) {
if (dimexps) {
for (size_t i = 0; i < dimexps->size(); ++i) {
(*dimexps)[i]->transToType(e, types::primInt());
c = new types::array(c);
}
}
if (dims) {
for (size_t i = 0; i < dims->size(); ++i) {
e.c.encode(inst::intpush,0);
}
}
e.c.encode(inst::intpush,
(Int) ((dimexps ? dimexps->size():0)
+ (dims ? dims->size():0)));
e.c.encode(inst::builtin, run::newDeepArray);
return c;
} else {
em.compiler(getPos());
em << "new array expression must have either dims or dimexps";
return primError();
}
}
types::ty *newArrayExp::getType(coenv &e)
{
types::ty *c = celltype->trans(e);
if (c->kind == ty_void) {
return primError();
}
if (dims)
c = dims->truetype(c);
if (dimexps) {
Int depth = (Int)dimexps->size();
while (depth > 0) {
c = new types::array(c);
depth--;
}
}
return c;
}
} // namespace absyntax
|
