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
|
#############################################################################
##
#W record.gd GAP library Thomas Breuer
#W & Frank Celler
##
##
#Y Copyright (C) 1997, Lehrstuhl D für Mathematik, RWTH Aachen, Germany
#Y (C) 1998 School Math and Comp. Sci., University of St Andrews, Scotland
#Y Copyright (C) 2002 The GAP Group
##
## This file contains methods for records.
## Compared to ⪆ 3, where records were used to represent domains and
## all kinds of external arithmetic objects, in ⪆ 4 there is no
## important role for records.
## So the standard library provides only methods for `PrintObj', `String',
## `=', and `<', and the latter two are not installed to compare records
## with objects in other families.
##
#############################################################################
##
#C IsRecord( <obj> )
#C IsRecordCollection( <obj> )
#C IsRecordCollColl( <obj> )
##
## <#GAPDoc Label="IsRecord">
## <ManSection>
## <Filt Name="IsRecord" Arg='obj' Type='Category'/>
## <Filt Name="IsRecordCollection" Arg='obj' Type='Category'/>
## <Filt Name="IsRecordCollColl" Arg='obj' Type='Category'/>
##
## <Description>
## <Index Subkey="for records">test</Index>
## <Example><![CDATA[
## gap> IsRecord( rec( a := 1, b := 2 ) );
## true
## gap> IsRecord( IsRecord );
## false
## ]]></Example>
## </Description>
## </ManSection>
## <#/GAPDoc>
##
DeclareCategoryKernel( "IsRecord", IsObject, IS_REC );
DeclareCategoryCollections( "IsRecord" );
DeclareCategoryCollections( "IsRecordCollection" );
#############################################################################
##
#V RecordsFamily . . . . . . . . . . . . . . . . . . . . . family of records
##
## <ManSection>
## <Var Name="RecordsFamily"/>
##
## <Description>
## </Description>
## </ManSection>
##
BIND_GLOBAL( "RecordsFamily", NewFamily( "RecordsFamily", IS_REC ) );
#############################################################################
##
#V TYPE_PREC_MUTABLE . . . . . . . . . . . type of a mutable internal record
##
## <ManSection>
## <Var Name="TYPE_PREC_MUTABLE"/>
##
## <Description>
## </Description>
## </ManSection>
##
BIND_GLOBAL( "TYPE_PREC_MUTABLE",
NewType( RecordsFamily, IS_MUTABLE_OBJ and IS_REC and IsInternalRep ) );
#############################################################################
##
#V TYPE_PREC_IMMUTABLE . . . . . . . . type of an immutable internal record
##
## <ManSection>
## <Var Name="TYPE_PREC_IMMUTABLE"/>
##
## <Description>
## </Description>
## </ManSection>
##
BIND_GLOBAL( "TYPE_PREC_IMMUTABLE",
NewType( RecordsFamily, IS_REC and IsInternalRep ) );
#############################################################################
##
#o \.( <rec>, <name> ) . . . . . . . . . . . . . . . . get a component value
##
DeclareOperationKernel( ".", [ IsObject, IsObject ], ELM_REC );
#############################################################################
##
#o IsBound\.( <rec>, <name> ) . . . . . . . . . . . . . . test a component
##
DeclareOperationKernel( "IsBound.", [ IsObject, IsObject ], ISB_REC );
#############################################################################
##
#o \.\:\=( <rec>, <name>, <val> ) . . . . . . . . . . . . . assign a value
##
DeclareOperationKernel( ".:=", [ IsObject, IsObject, IsObject ], ASS_REC );
#############################################################################
##
#o Unbind\.( <rec>, <name> ) . . . . . . . . . . . . . . . unbind component
##
DeclareOperationKernel( "Unbind.", [ IsObject, IsObject ], UNB_REC );
#############################################################################
##
#A RecNames( <record> )
##
## <#GAPDoc Label="RecNames">
## <ManSection>
## <Attr Name="RecNames" Arg='record'/>
##
## <Description>
## returns a list of strings corresponding to the names of the record
## components of the record <A>record</A>.
## <P/>
## <Example><![CDATA[
## gap> r := rec( a := 1, b := 2 );;
## gap> Set(RecNames( r )); # 'Set' because ordering depends on GAP session
## [ "a", "b" ]
## ]]></Example>
## <P/>
## Note that you cannot use the string result in the ordinary way to access
## or change a record component.
## You can use the <C><A>record</A>.(<A>name</A>)</C> construct for that,
## see <Ref Sect="Accessing Record Elements"/> and
## <Ref Sect="Record Assignment"/>.
## </Description>
## </ManSection>
## <#/GAPDoc>
##
DeclareAttribute( "RecNames", IsRecord );
#############################################################################
##
#F NamesOfComponents( <comobj> )
##
## <#GAPDoc Label="NamesOfComponents">
## <ManSection>
## <Func Name="NamesOfComponents" Arg='comobj'/>
##
## <Description>
## For a component object <A>comobj</A>,
## <Ref Func="NamesOfComponents"/> returns a list of strings,
## which are the names of components currently bound in <A>comobj</A>.
## <P/>
## For a record <A>comobj</A>,
## <Ref Func="NamesOfComponents"/> returns the result of
## <Ref Func="RecNames"/>.
## </Description>
## </ManSection>
## <#/GAPDoc>
##
DeclareGlobalFunction( "NamesOfComponents" );
#############################################################################
##
#V IdentifierLetters . . . . . . . .characters allowed in normal identifiers
##
## This is used to produce warning messages when the XxxxGlobal functions
## are applied to a name which could not be read in by the parser without
## escapes
##
BIND_GLOBAL( "IdentifierLetters",
Immutable("0123456789@ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz") );
IsSet( IdentifierLetters ); # ensure GAP knows that this is a set
#############################################################################
##
#F SetNamesForFunctionsInRecord( <rec-name>[, <record> ][, <field-names>])
##
## set the names of functions bound to components of a record.
##
DeclareGlobalFunction("SetNamesForFunctionsInRecord");
|
