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
197
198
199
200
201
202
203
|
/* $Header$ */
/*
* Copyright © 1988-2004 Keith Packard and Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*/
/*
* expr.c
*
* handle expression trees
*/
#include "nickle.h"
#include "gram.h"
static void
ExprTreeMark (void *object)
{
ExprTree *et = object;
MemReference (et->expr.namespace);
MemReference (et->expr.type);
MemReference (et->left);
MemReference (et->right);
if (!profiling)
et->expr.ticks = et->expr.sub_ticks = 0;
}
static void
ExprConstMark (void *object)
{
ExprConst *ec = object;
MemReference (ec->expr.namespace);
MemReference (ec->expr.type);
MemReference (ec->constant);
if (!profiling)
ec->expr.ticks = ec->expr.sub_ticks = 0;
}
static void
ExprAtomMark (void *object)
{
ExprAtom *ea = object;
MemReference (ea->expr.namespace);
MemReference (ea->expr.type);
MemReference (ea->symbol);
if (!profiling)
ea->expr.ticks = ea->expr.sub_ticks = 0;
}
static void
ExprCodeMark (void *object)
{
ExprCode *ec = object;
MemReference (ec->expr.namespace);
MemReference (ec->expr.type);
MemReference (ec->code);
if (!profiling)
ec->expr.ticks = ec->expr.sub_ticks = 0;
}
static void
ExprDeclMark (void *object)
{
ExprDecl *ed = object;
MemReference (ed->expr.namespace);
MemReference (ed->expr.type);
MemReference (ed->decl);
MemReference (ed->type);
if (!profiling)
ed->expr.ticks = ed->expr.sub_ticks = 0;
}
DataType ExprTreeType = { ExprTreeMark, 0, "ExprTreeType" };
DataType ExprConstType = { ExprConstMark, 0, "ExprConstType" };
DataType ExprAtomType = { ExprAtomMark, 0, "ExprAtomType" };
DataType ExprCodeType = { ExprCodeMark, 0, "ExprCodeType" };
DataType ExprDeclType = { ExprDeclMark, 0, "ExprDeclType" };
static void
ExprBaseInit (Expr *e, int tag)
{
e->base.tag = tag;
e->base.file = LexFileName ();
e->base.line = LexFileLine ();
e->base.namespace = CurrentNamespace;
e->base.type = 0;
e->base.ticks = 0 ;
e->base.sub_ticks = 0;
}
Expr *
NewExprTree(int tag, Expr *left, Expr *right)
{
ENTER ();
Expr *e;
e = ALLOCATE (&ExprTreeType, sizeof (ExprTree));
ExprBaseInit (e, tag);
if (left)
{
if (left->base.file == e->base.file && left->base.line < e->base.line)
e->base.line = left->base.line;
}
else if (right)
{
if (right->base.file == e->base.file && right->base.line < e->base.line)
e->base.line = right->base.line;
}
e->tree.left = left;
e->tree.right = right;
RETURN ((Expr *) e);
}
Expr *
NewExprComma (Expr *left, Expr *right)
{
return NewExprTree (COMMA, left, right);
}
Expr *
NewExprConst (int tag, Value val)
{
ENTER ();
Expr *e;
e = ALLOCATE (&ExprConstType, sizeof (ExprConst));
ExprBaseInit (e, tag);
e->constant.constant = val;
RETURN (e);
}
Expr *
NewExprAtom (Atom atom, SymbolPtr symbol, Bool privateFound)
{
ENTER ();
Expr *e;
e = ALLOCATE (&ExprAtomType, sizeof (ExprAtom));
ExprBaseInit (e, NAME);
e->atom.atom = atom;
e->atom.symbol = symbol;
e->atom.privateFound = privateFound;
RETURN (e);
}
Expr *
NewExprCode (CodePtr code, ExprPtr name)
{
ENTER ();
Expr *e;
e = ALLOCATE (&ExprCodeType, sizeof (ExprCode));
ExprBaseInit (e, FUNC);
e->code.code = code;
code->base.name = name;
RETURN (e);
}
Expr *
NewExprDecl (int tag, DeclListPtr decl, Class class, Type *type, Publish publish)
{
ENTER ();
Expr *e;
e = ALLOCATE (&ExprDeclType, sizeof (ExprDecl));
ExprBaseInit (e, tag);
e->decl.decl = decl;
e->decl.class = class;
e->decl.type = type;
e->decl.publish = publish;
RETURN (e);
}
/*
* LALR grammars like to build things right to left, but
* sometimes we like the resulting data structure to be left to right
*/
Expr*
ExprRehang (Expr *e, Expr *right)
{
if (e->tree.left)
{
Expr *t, *left;
left = e->tree.right;
t = ExprRehang (e->tree.left, e);
e->tree.left = left;
e->tree.right = right;
return t;
}
else
{
e->tree.left = e->tree.right;
e->tree.right = right;
return e;
}
}
|
