1 | // |
---|
2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
---|
3 | // |
---|
4 | // The contents of this file are covered under the licence agreement in the |
---|
5 | // file "LICENCE" distributed with Cforall. |
---|
6 | // |
---|
7 | // Cost.h -- |
---|
8 | // |
---|
9 | // Author : Richard C. Bilson |
---|
10 | // Created On : Sun May 17 09:39:50 2015 |
---|
11 | // Last Modified By : Aaron B. Moss |
---|
12 | // Last Modified On : Fri Oct 05 14:32:00 2018 |
---|
13 | // Update Count : 7 |
---|
14 | // |
---|
15 | |
---|
16 | #pragma once |
---|
17 | |
---|
18 | #include <iostream> |
---|
19 | |
---|
20 | namespace ResolvExpr { |
---|
21 | class Cost { |
---|
22 | private: |
---|
23 | Cost( int unsafeCost, int polyCost, int safeCost, int varCost, int specCost, |
---|
24 | int referenceCost ); |
---|
25 | |
---|
26 | public: |
---|
27 | Cost & incUnsafe( int inc = 1 ); |
---|
28 | Cost & incPoly( int inc = 1 ); |
---|
29 | Cost & incSafe( int inc = 1 ); |
---|
30 | Cost & incVar( int inc = 1 ); |
---|
31 | Cost & decSpec( int inc = 1 ); |
---|
32 | Cost & incReference( int inc = 1 ); |
---|
33 | |
---|
34 | int get_unsafeCost() const { return unsafeCost; } |
---|
35 | int get_polyCost() const { return polyCost; } |
---|
36 | int get_safeCost() const { return safeCost; } |
---|
37 | int get_varCost() const { return varCost; } |
---|
38 | int get_specCost() const { return specCost; } |
---|
39 | int get_referenceCost() const { return referenceCost; } |
---|
40 | |
---|
41 | Cost operator+( const Cost &other ) const; |
---|
42 | Cost operator-( const Cost &other ) const; |
---|
43 | Cost &operator+=( const Cost &other ); |
---|
44 | bool operator<( const Cost &other ) const; |
---|
45 | bool operator==( const Cost &other ) const; |
---|
46 | bool operator!=( const Cost &other ) const; |
---|
47 | friend std::ostream &operator<<( std::ostream &os, const Cost &cost ); |
---|
48 | // returns negative for *this < other, 0 for *this == other, positive for *this > other |
---|
49 | int compare( const Cost &other ) const; |
---|
50 | |
---|
51 | static const Cost zero; |
---|
52 | static const Cost infinity; |
---|
53 | |
---|
54 | static const Cost unsafe; |
---|
55 | static const Cost poly; |
---|
56 | static const Cost safe; |
---|
57 | static const Cost var; |
---|
58 | static const Cost spec; |
---|
59 | static const Cost reference; |
---|
60 | |
---|
61 | private: |
---|
62 | int unsafeCost; ///< Unsafe (narrowing) conversions |
---|
63 | int polyCost; ///< Count of parameters and return values bound to some poly type |
---|
64 | int safeCost; ///< Safe (widening) conversions |
---|
65 | int varCost; ///< Count of polymorphic type variables |
---|
66 | int specCost; ///< Polymorphic type specializations (type assertions), negative cost |
---|
67 | int referenceCost; ///< reference conversions |
---|
68 | }; |
---|
69 | |
---|
70 | inline Cost::Cost( int unsafeCost, int polyCost, int safeCost, int varCost, int specCost, |
---|
71 | int referenceCost ) |
---|
72 | : unsafeCost( unsafeCost ), polyCost( polyCost ), safeCost( safeCost ), varCost( varCost ), |
---|
73 | specCost( specCost ), referenceCost( referenceCost ) {} |
---|
74 | |
---|
75 | inline Cost & Cost::incUnsafe( int inc ) { |
---|
76 | if ( *this == infinity ) return *this; |
---|
77 | unsafeCost += inc; |
---|
78 | return *this; |
---|
79 | } |
---|
80 | |
---|
81 | inline Cost & Cost::incPoly( int inc ) { |
---|
82 | if ( *this == infinity ) return *this; |
---|
83 | polyCost += inc; |
---|
84 | return *this; |
---|
85 | } |
---|
86 | |
---|
87 | inline Cost & Cost::incSafe( int inc ) { |
---|
88 | if ( *this == infinity ) return *this; |
---|
89 | safeCost += inc; |
---|
90 | return *this; |
---|
91 | } |
---|
92 | |
---|
93 | inline Cost & Cost::incVar( int inc ) { |
---|
94 | if ( *this == infinity ) return *this; |
---|
95 | varCost += inc; |
---|
96 | return *this; |
---|
97 | } |
---|
98 | |
---|
99 | inline Cost& Cost::decSpec( int dec ) { |
---|
100 | if ( *this == infinity ) return *this; |
---|
101 | specCost -= dec; |
---|
102 | return *this; |
---|
103 | } |
---|
104 | |
---|
105 | inline Cost & Cost::incReference( int inc ) { |
---|
106 | if ( *this == infinity ) return *this; |
---|
107 | referenceCost += inc; |
---|
108 | return *this; |
---|
109 | } |
---|
110 | |
---|
111 | inline Cost Cost::operator+( const Cost &other ) const { |
---|
112 | if ( *this == infinity || other == infinity ) return infinity; |
---|
113 | return Cost{ |
---|
114 | unsafeCost + other.unsafeCost, polyCost + other.polyCost, safeCost + other.safeCost, |
---|
115 | varCost + other.varCost, specCost + other.specCost, |
---|
116 | referenceCost + other.referenceCost }; |
---|
117 | } |
---|
118 | |
---|
119 | inline Cost Cost::operator-( const Cost &other ) const { |
---|
120 | if ( *this == infinity || other == infinity ) return infinity; |
---|
121 | return Cost{ |
---|
122 | unsafeCost - other.unsafeCost, polyCost - other.polyCost, safeCost - other.safeCost, |
---|
123 | varCost - other.varCost, specCost - other.specCost, |
---|
124 | referenceCost - other.referenceCost }; |
---|
125 | } |
---|
126 | |
---|
127 | inline Cost &Cost::operator+=( const Cost &other ) { |
---|
128 | if ( *this == infinity ) return *this; |
---|
129 | if ( other == infinity ) { |
---|
130 | *this = infinity; |
---|
131 | return *this; |
---|
132 | } |
---|
133 | unsafeCost += other.unsafeCost; |
---|
134 | polyCost += other.polyCost; |
---|
135 | safeCost += other.safeCost; |
---|
136 | varCost += other.varCost; |
---|
137 | specCost += other.specCost; |
---|
138 | referenceCost += other.referenceCost; |
---|
139 | return *this; |
---|
140 | } |
---|
141 | |
---|
142 | inline bool Cost::operator<( const Cost &other ) const { |
---|
143 | if ( *this == infinity ) return false; |
---|
144 | if ( other == infinity ) return true; |
---|
145 | |
---|
146 | if ( unsafeCost > other.unsafeCost ) { |
---|
147 | return false; |
---|
148 | } else if ( unsafeCost < other.unsafeCost ) { |
---|
149 | return true; |
---|
150 | } else if ( polyCost > other.polyCost ) { |
---|
151 | return false; |
---|
152 | } else if ( polyCost < other.polyCost ) { |
---|
153 | return true; |
---|
154 | } else if ( safeCost > other.safeCost ) { |
---|
155 | return false; |
---|
156 | } else if ( safeCost < other.safeCost ) { |
---|
157 | return true; |
---|
158 | } else if ( varCost > other.varCost ) { |
---|
159 | return false; |
---|
160 | } else if ( varCost < other.varCost ) { |
---|
161 | return true; |
---|
162 | } else if ( specCost > other.specCost ) { |
---|
163 | return false; |
---|
164 | } else if ( specCost > other.specCost ) { |
---|
165 | return true; |
---|
166 | } else if ( referenceCost > other.referenceCost ) { |
---|
167 | return false; |
---|
168 | } else if ( referenceCost < other.referenceCost ) { |
---|
169 | return true; |
---|
170 | } else { |
---|
171 | return false; |
---|
172 | } // if |
---|
173 | } |
---|
174 | |
---|
175 | inline int Cost::compare( const Cost &other ) const { |
---|
176 | if ( *this == infinity ) return +1; |
---|
177 | if ( other == infinity ) return -1; |
---|
178 | |
---|
179 | int c = unsafeCost - other.unsafeCost; if ( c ) return c; |
---|
180 | c = polyCost - other.polyCost; if ( c ) return c; |
---|
181 | c = safeCost - other.safeCost; if ( c ) return c; |
---|
182 | c = varCost - other.varCost; if ( c ) return c; |
---|
183 | c = specCost - other.specCost; if ( c ) return c; |
---|
184 | return referenceCost - other.referenceCost; |
---|
185 | } |
---|
186 | |
---|
187 | inline bool Cost::operator==( const Cost &other ) const { |
---|
188 | return unsafeCost == other.unsafeCost |
---|
189 | && polyCost == other.polyCost |
---|
190 | && safeCost == other.safeCost |
---|
191 | && varCost == other.varCost |
---|
192 | && specCost == other.specCost |
---|
193 | && referenceCost == other.referenceCost; |
---|
194 | } |
---|
195 | |
---|
196 | inline bool Cost::operator!=( const Cost &other ) const { |
---|
197 | return !( *this == other ); |
---|
198 | } |
---|
199 | |
---|
200 | inline std::ostream &operator<<( std::ostream &os, const Cost &cost ) { |
---|
201 | return os << "( " << cost.unsafeCost << ", " << cost.polyCost << ", " |
---|
202 | << cost.safeCost << ", " << cost.varCost << ", " << cost.specCost << ", " |
---|
203 | << cost.referenceCost << " )"; |
---|
204 | } |
---|
205 | } // namespace ResolvExpr |
---|
206 | |
---|
207 | // Local Variables: // |
---|
208 | // tab-width: 4 // |
---|
209 | // mode: c++ // |
---|
210 | // compile-command: "make install" // |
---|
211 | // End: // |
---|