[SCM] gawk branch, gawk-5.2-stable, updated. gawk-4.1.0-5069-g7ab825b1

[Arnold Robbins]

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- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=7ab825b1eeed5589faca505ff43d2cd2fb48faba

commit 7ab825b1eeed5589faca505ff43d2cd2fb48faba
Author: Arnold D. Robbins <arnold@skeeve.com>
Date:   Wed Jun 14 11:43:36 2023 -0400

    Small doc update.

diff --git a/doc/ChangeLog b/doc/ChangeLog
index 7eaa6989..60df8cce 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,9 @@
+2023-06-14         Arnold D. Robbins     <arnold@skeeve.com>
+
+       * gawktexi.in (Fields): Add a footnote that referencing an
+       uninitialized field issues a lint warning. Suggested by
+       Sebastian Carlos <sebaaa1754@gmail.com>.
+
 2023-06-12         Arnold D. Robbins     <arnold@skeeve.com>
 
        * gawktexi.in (Statements/Lines): Document how backslash continuation
diff --git a/doc/gawk.info b/doc/gawk.info
index ef749d22..aae3cade 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -4854,7 +4854,7 @@ time it reads a record.  No matter how many fields there 
are, the last
 field in a record can be represented by ‘$NF’.  So, ‘$NF’ is the same 
as
 ‘$7’, which is ‘example.’.  If you try to reference a field beyond the
 last one (such as ‘$8’ when the record has only seven fields), you get
-the empty string.  (If used in a numeric operation, you get zero.)
+the empty string.  If used in a numeric operation, you get zero.(1)
 
    The use of ‘$0’, which looks like a reference to the “zeroth” field,
 is a special case: it represents the whole input record.  Use it when
@@ -4877,6 +4877,11 @@ record:
      ⊣ Julie F
      ⊣ Samuel A
 
+   ---------- Footnotes ----------
+
+   (1) In either case, with the ‘--lint’ option, ‘gawk’ warns that you
+are referencing an uninitialized field.
+
 
 File: gawk.info,  Node: Nonconstant Fields,  Next: Changing Fields,  Prev: 
Fields,  Up: Reading Files
 
@@ -39507,538 +39512,539 @@ Node: awk split records216812
 Node: gawk split records221702
 Ref: gawk split records-Footnote-1226996
 Node: Fields227033
-Node: Nonconstant Fields229920
-Ref: Nonconstant Fields-Footnote-1232231
-Node: Changing Fields232447
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-Node: Default Field Splitting241571
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-Node: Command Line Field Separator247638
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-Node: Allowing trailing data259993
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-Node: Splitting By Content262684
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-Node: FS versus FPAT268439
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-Node: Getline/Coprocess291441
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+Node: Calling Built-in570569
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+Node: Getlocaltime Function709211
+Node: Readfile Function712985
+Node: Shell Quoting715014
+Node: Isnumeric Function716470
+Node: Data File Management717882
+Node: Filetrans Function718514
+Node: Rewind Function722808
+Node: File Checking724787
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+Node: Ignoring Assigns728433
+Node: Getopt Function730007
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+Node: Passwd Functions746053
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+Node: Clones770167
+Node: Cut Program771439
+Node: Egrep Program781880
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+Node: Uniq Program814642
+Node: Wc Program822507
+Node: Bytes vs. Characters822902
+Node: Using extensions824504
+Node: wc program825284
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+Node: Dupword Program831519
+Node: Alarm Program833582
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+Node: History Sorting851241
+Node: Extract Program853516
+Node: Simple Sed861785
+Node: Igawk Program865001
+Ref: Igawk Program-Footnote-1880248
+Ref: Igawk Program-Footnote-2880454
+Ref: Igawk Program-Footnote-3880584
+Node: Anagram Program880711
+Node: Signature Program883807
+Node: Programs Summary885059
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+Ref: Programs Exercises-Footnote-1890633
+Node: Advanced Features890719
+Node: Nondecimal Data893213
+Node: Boolean Typed Values894843
+Node: Array Sorting896818
+Node: Controlling Array Traversal897547
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+Node: Two-way I/O912503
+Ref: Two-way I/O-Footnote-1920498
+Ref: Two-way I/O-Footnote-2920689
+Node: TCP/IP Networking920771
+Node: Profiling923951
+Node: Persistent Memory933661
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+Node: Internationalization947207
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+Node: Explaining gettext949608
+Ref: Explaining gettext-Footnote-1955761
+Ref: Explaining gettext-Footnote-2955956
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+Ref: Programmer i18n-Footnote-1961234
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+Node: Debugging975644
+Node: Debugging Concepts976093
+Node: Debugging Terms977919
+Node: Awk Debugging980532
+Ref: Awk Debugging-Footnote-1981509
+Node: Sample Debugging Session981649
+Node: Debugger Invocation982201
+Node: Finding The Bug983830
+Node: List of Debugger Commands990516
+Node: Breakpoint Control991893
+Node: Debugger Execution Control995725
+Node: Viewing And Changing Data999205
+Node: Execution Stack1002943
+Node: Debugger Info1004624
+Node: Miscellaneous Debugger Commands1008923
+Node: Readline Support1014176
+Node: Limitations1015122
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+Node: Global Namespace1020192
+Node: Qualified Names1021637
+Node: Default Namespace1022672
+Node: Changing The Namespace1023447
+Node: Naming Rules1025141
+Node: Internal Name Management1027056
+Node: Namespace Example1028126
+Node: Namespace And Features1030709
+Node: Namespace Summary1032166
+Node: Arbitrary Precision Arithmetic1033679
+Node: Computer Arithmetic1035198
+Ref: table-numeric-ranges1039015
+Ref: table-floating-point-ranges1039513
+Ref: Computer Arithmetic-Footnote-11040172
+Node: Math Definitions1040231
+Ref: table-ieee-formats1043276
+Node: MPFR features1043850
+Node: MPFR On Parole1044303
+Ref: MPFR On Parole-Footnote-11045147
+Node: MPFR Intro1045306
+Node: FP Math Caution1046996
+Ref: FP Math Caution-Footnote-11048070
+Node: Inexactness of computations1048447
+Node: Inexact representation1049478
+Node: Comparing FP Values1050861
+Node: Errors accumulate1052119
+Node: Strange values1053586
+Ref: Strange values-Footnote-11056252
+Node: Getting Accuracy1056357
+Node: Try To Round1059094
+Node: Setting precision1060001
+Ref: table-predefined-precision-strings1060706
+Node: Setting the rounding mode1062591
+Ref: table-gawk-rounding-modes1062973
+Ref: Setting the rounding mode-Footnote-11067031
+Node: Arbitrary Precision Integers1067214
+Ref: Arbitrary Precision Integers-Footnote-11070426
+Node: Checking for MPFR1070582
+Node: POSIX Floating Point Problems1072072
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+Node: Floating point summary1076974
+Node: Dynamic Extensions1079238
+Node: Extension Intro1080837
+Node: Plugin License1082145
+Node: Extension Mechanism Outline1082958
+Ref: figure-load-extension1083409
+Ref: figure-register-new-function1084994
+Ref: figure-call-new-function1086104
+Node: Extension API Description1088228
+Node: Extension API Functions Introduction1089957
+Ref: table-api-std-headers1091855
+Node: General Data Types1096319
+Ref: General Data Types-Footnote-11105487
+Node: Memory Allocation Functions1105802
+Ref: Memory Allocation Functions-Footnote-11110527
+Node: Constructor Functions1110626
+Node: API Ownership of MPFR and GMP Values1114531
+Node: Registration Functions1116092
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+Node: Exit Callback Functions1122372
+Node: Extension Version String1123691
+Node: Input Parsers1124386
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+Node: Two-way processors1143878
+Node: Printing Messages1146239
+Ref: Printing Messages-Footnote-11147453
+Node: Updating ERRNO1147608
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+Ref: table-value-types-returned1149160
+Node: Accessing Parameters1150269
+Node: Symbol Table Access1151553
+Node: Symbol table by name1152069
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+Ref: Symbol table by cookie-Footnote-11159693
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+Node: Array Functions1167620
+Node: Flattening Arrays1172649
+Node: Creating Arrays1179701
+Node: Redirection API1184551
+Node: Extension API Variables1187572
+Node: Extension Versioning1188297
+Ref: gawk-api-version1188734
+Node: Extension GMP/MPFR Versioning1190522
+Node: Extension API Informational Variables1192228
+Node: Extension API Boilerplate1193389
+Node: Changes from API V11197525
+Node: Finding Extensions1199159
+Node: Extension Example1199734
+Node: Internal File Description1200558
+Node: Internal File Ops1204882
+Ref: Internal File Ops-Footnote-11216440
+Node: Using Internal File Ops1216588
+Ref: Using Internal File Ops-Footnote-11219019
+Node: Extension Samples1219297
+Node: Extension Sample File Functions1220866
+Node: Extension Sample Fnmatch1229004
+Node: Extension Sample Fork1230599
+Node: Extension Sample Inplace1231875
+Node: Extension Sample Ord1235547
+Node: Extension Sample Readdir1236423
+Ref: table-readdir-file-types1237212
+Node: Extension Sample Revout1238573
+Node: Extension Sample Rev2way1239170
+Node: Extension Sample Read write array1239922
+Node: Extension Sample Readfile1243196
+Node: Extension Sample Time1244327
+Node: Extension Sample API Tests1246617
+Node: gawkextlib1247125
+Node: Extension summary1250161
+Node: Extension Exercises1254019
+Node: Language History1255297
+Node: V7/SVR3.11257011
+Node: SVR41259361
+Node: POSIX1260893
+Node: BTL1262318
+Node: POSIX/GNU1263087
+Node: Feature History1269618
+Node: Common Extensions1288736
+Node: Ranges and Locales1290105
+Ref: Ranges and Locales-Footnote-11294906
+Ref: Ranges and Locales-Footnote-21294933
+Ref: Ranges and Locales-Footnote-31295172
+Node: Contributors1295395
+Node: History summary1301600
+Node: Installation1303046
+Node: Gawk Distribution1304010
+Node: Getting1304502
+Node: Extracting1305501
+Node: Distribution contents1307213
+Node: Unix Installation1315293
+Node: Quick Installation1316115
+Node: Compiling with MPFR1318661
+Node: Shell Startup Files1319367
+Node: Additional Configuration Options1320524
+Node: Configuration Philosophy1322911
+Node: Compiling from Git1325413
+Node: Building the Documentation1325972
+Node: Non-Unix Installation1327384
+Node: PC Installation1327860
+Node: PC Binary Installation1328733
+Node: PC Compiling1329638
+Node: PC Using1330816
+Node: Cygwin1334544
+Node: MSYS1335800
+Node: OpenVMS Installation1336432
+Node: OpenVMS Compilation1337113
+Ref: OpenVMS Compilation-Footnote-11338596
+Node: OpenVMS Dynamic Extensions1338658
+Node: OpenVMS Installation Details1340294
+Node: OpenVMS Running1342729
+Node: OpenVMS GNV1346866
+Node: Bugs1347621
+Node: Bug definition1348545
+Node: Bug address1352196
+Node: Usenet1355787
+Node: Performance bugs1357018
+Node: Asking for help1360036
+Node: Maintainers1362027
+Node: Other Versions1363054
+Node: Installation summary1372397
+Node: Notes1373781
+Node: Compatibility Mode1374591
+Node: Additions1375413
+Node: Accessing The Source1376358
+Node: Adding Code1377893
+Node: New Ports1385029
+Node: Derived Files1389539
+Ref: Derived Files-Footnote-11395386
+Ref: Derived Files-Footnote-21395421
+Ref: Derived Files-Footnote-31396038
+Node: Future Extensions1396152
+Node: Implementation Limitations1396824
+Node: Extension Design1398066
+Node: Old Extension Problems1399230
+Ref: Old Extension Problems-Footnote-11400806
+Node: Extension New Mechanism Goals1400867
+Ref: Extension New Mechanism Goals-Footnote-11404363
+Node: Extension Other Design Decisions1404564
+Node: Extension Future Growth1406763
+Node: Notes summary1407387
+Node: Basic Concepts1408600
+Node: Basic High Level1409285
+Ref: figure-general-flow1409567
+Ref: figure-process-flow1410274
+Ref: Basic High Level-Footnote-11413675
+Node: Basic Data Typing1413864
+Node: Glossary1417282
+Node: Copying1450404
+Node: GNU Free Documentation License1488165
+Node: Index1513488
 
 End Tag Table
 
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 32daddc3..3b906ca3 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -7514,7 +7514,9 @@ there are, the last field in a record can be represented 
by @code{$NF}.
 So, @code{$NF} is the same as @code{$7}, which is @samp{example.}.
 If you try to reference a field beyond the last
 one (such as @code{$8} when the record has only seven fields), you get
-the empty string.  (If used in a numeric operation, you get zero.)
+the empty string.  If used in a numeric operation, you get zero.@footnote{In
+either case, with the @option{--lint} option, @command{gawk} warns that you
+are referencing an uninitialized field.}
 
 The use of @code{$0}, which looks like a reference to the ``zeroth'' field, is
 a special case: it represents the whole input record. Use it
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index be06acc3..c68f9403 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -7110,7 +7110,9 @@ there are, the last field in a record can be represented 
by @code{$NF}.
 So, @code{$NF} is the same as @code{$7}, which is @samp{example.}.
 If you try to reference a field beyond the last
 one (such as @code{$8} when the record has only seven fields), you get
-the empty string.  (If used in a numeric operation, you get zero.)
+the empty string.  If used in a numeric operation, you get zero.@footnote{In
+either case, with the @option{--lint} option, @command{gawk} warns that you
+are referencing an uninitialized field.}
 
 The use of @code{$0}, which looks like a reference to the ``zeroth'' field, is
 a special case: it represents the whole input record. Use it

-----------------------------------------------------------------------

Summary of changes:
 doc/ChangeLog   |    6 +
 doc/gawk.info   | 1072 ++++++++++++++++++++++++++++---------------------------
 doc/gawk.texi   |    4 +-
 doc/gawktexi.in |    4 +-
 4 files changed, 551 insertions(+), 535 deletions(-)


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