2 // ConditionRelationalExpression.cs
5 // Marek Sieradzki (marek.sieradzki@gmail.com)
7 // (C) 2006 Marek Sieradzki
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System
.Collections
;
34 namespace Microsoft
.Build
.BuildEngine
{
35 internal sealed class ConditionRelationalExpression
: ConditionExpression
{
37 readonly ConditionExpression left
;
38 readonly ConditionExpression right
;
39 readonly RelationOperator op
;
41 public ConditionRelationalExpression (ConditionExpression left
,
42 ConditionExpression right
,
50 public override bool BoolEvaluate (Project context
)
52 if (left
.CanEvaluateToNumber (context
) && right
.CanEvaluateToNumber (context
)) {
55 l
= left
.NumberEvaluate (context
);
56 r
= right
.NumberEvaluate (context
);
58 return NumberCompare (l
, r
, op
);
59 } else if (left
.CanEvaluateToBool (context
) && right
.CanEvaluateToBool (context
)) {
62 l
= left
.BoolEvaluate (context
);
63 r
= right
.BoolEvaluate (context
);
65 return BoolCompare (l
, r
, op
);
69 l
= left
.StringEvaluate (context
);
70 r
= right
.StringEvaluate (context
);
72 return StringCompare (l
, r
, op
);
76 public override float NumberEvaluate (Project context
)
78 throw new NotSupportedException ();
81 public override string StringEvaluate (Project context
)
83 throw new NotSupportedException ();
86 // FIXME: check if we really can do it
87 public override bool CanEvaluateToBool (Project context
)
92 public override bool CanEvaluateToNumber (Project context
)
97 public override bool CanEvaluateToString (Project context
)
102 static bool NumberCompare (float l
,
106 IComparer comparer
= CaseInsensitiveComparer
.DefaultInvariant
;
109 case RelationOperator
.Equal
:
110 return comparer
.Compare (l
, r
) == 0;
111 case RelationOperator
.NotEqual
:
112 return comparer
.Compare (l
, r
) != 0;
113 case RelationOperator
.Greater
:
114 return comparer
.Compare (l
, r
) > 0;
115 case RelationOperator
.GreaterOrEqual
:
116 return comparer
.Compare (l
, r
) >= 0;
117 case RelationOperator
.Less
:
118 return comparer
.Compare (l
, r
) < 0;
119 case RelationOperator
.LessOrEqual
:
120 return comparer
.Compare (l
, r
) <= 0;
122 throw new NotSupportedException (String
.Format ("Relational operator {0} is not supported.", op
));
126 static bool BoolCompare (bool l
,
130 IComparer comparer
= CaseInsensitiveComparer
.DefaultInvariant
;
133 case RelationOperator
.Equal
:
134 return comparer
.Compare (l
, r
) == 0;
135 case RelationOperator
.NotEqual
:
136 return comparer
.Compare (l
, r
) != 0;
138 throw new NotSupportedException (String
.Format ("Relational operator {0} is not supported.", op
));
142 static bool StringCompare (string l
,
146 IComparer comparer
= CaseInsensitiveComparer
.DefaultInvariant
;
149 case RelationOperator
.Equal
:
150 return comparer
.Compare (l
, r
) == 0;
151 case RelationOperator
.NotEqual
:
152 return comparer
.Compare (l
, r
) != 0;
154 throw new NotSupportedException (String
.Format ("Relational operator {0} is not supported.", op
));
159 internal enum RelationOperator
{