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
|
/*
* Copyright (c) 2003-2008, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "scope.h"
namespace ledger {
void symbol_scope_t::define(const string& name, expr_t::ptr_op_t def)
{
DEBUG("ledger.xpath.syms", "Defining '" << name << "' = " << def);
std::pair<symbol_map::iterator, bool> result
= symbols.insert(symbol_map::value_type(name, def));
if (! result.second) {
symbol_map::iterator i = symbols.find(name);
assert(i != symbols.end());
symbols.erase(i);
std::pair<symbol_map::iterator, bool> result2
= symbols.insert(symbol_map::value_type(name, def));
if (! result2.second)
throw_(compile_error,
"Redefinition of '" << name << "' in same scope");
}
}
value_t get_amount(scope_t& scope)
{
assert("I can't get the amount!");
return NULL_VALUE;
}
expr_t::ptr_op_t symbol_scope_t::lookup(const string& name)
{
switch (name[0]) {
case 'a':
if (name[1] == '\0' || name == "amount")
return WRAP_FUNCTOR(bind(get_amount, _1));
break;
}
symbol_map::const_iterator i = symbols.find(name);
if (i != symbols.end())
return (*i).second;
return child_scope_t::lookup(name);
}
#if 0
namespace {
int count_leaves(expr_t::ptr_op_t expr)
{
int count = 0;
if (expr->kind != expr_t::op_t::O_COMMA) {
count = 1;
} else {
count += count_leaves(expr->left());
count += count_leaves(expr->right());
}
return count;
}
expr_t::ptr_op_t reduce_leaves(expr_t::ptr_op_t expr,
expr_t::ptr_op_t context)
{
if (! expr)
return NULL;
expr_t::ptr_op_t temp;
if (expr->kind != expr_t::op_t::O_COMMA) {
if (expr->kind < expr_t::op_t::TERMINALS) {
temp.reset(expr);
} else {
temp.reset(new op_t(expr_t::op_t::VALUE));
temp->set_value(NULL_VALUE);
expr->compute(temp->as_value_lval(), context);
}
} else {
temp.reset(new op_t(expr_t::op_t::O_COMMA));
temp->set_left(reduce_leaves(expr->left(), context));
temp->set_right(reduce_leaves(expr->right(), context));
}
return temp.release();
}
expr_t::ptr_op_t find_leaf(expr_t::ptr_op_t context, int goal, long& found)
{
if (! context)
return NULL;
if (context->kind != expr_t::op_t::O_COMMA) {
if (goal == found++)
return context;
} else {
expr_t::ptr_op_t expr = find_leaf(context->left(), goal, found);
if (expr)
return expr;
expr = find_leaf(context->right(), goal, found);
if (expr)
return expr;
}
return NULL;
}
}
#endif
} // namespace ledger
|
