[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4215-g8acf99e
|
From: |
Arnold Robbins |
|
Subject: |
[SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4215-g8acf99e |
|
Date: |
Wed, 31 Mar 2021 14:09:16 -0400 (EDT) |
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gawk".
The branch, gawk-5.1-stable has been updated
via 8acf99e3293c45fbaef69ba9cee3e790f1ff45bd (commit)
from 728ac1e89ceeea5e646e4e6168a2dc4be0177ff2 (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=8acf99e3293c45fbaef69ba9cee3e790f1ff45bd
commit 8acf99e3293c45fbaef69ba9cee3e790f1ff45bd
Author: Arnold D. Robbins <arnold@skeeve.com>
Date: Wed Mar 31 21:08:58 2021 +0300
Add some doc on the empty regexp.
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 77d280b..04fff85 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,10 @@
+2021-03-31 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawktexi.in (Regexp Operator Details): Added a sidebar on
+ matching the empty regexp. Thanks to Arkadiusz Drabczyk
+ <arkadiusz@drabczyk.org> for pointing out the lack of
+ documentation.
+
2021-03-18 Arnold D. Robbins <arnold@skeeve.com>
* texinfo.tex: Updated from GNULIB.
diff --git a/doc/gawk.info b/doc/gawk.info
index d29e352..4f0eef3 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -3908,6 +3908,39 @@ themselves when there is nothing in the regexp that
precedes them. For
example, '/+/' matches a literal plus sign. However, many other
versions of 'awk' treat such a usage as a syntax error.
+ What About The Empty Regexp?
+
+ We describe here an advanced regexp usage. Feel free to skip it upon
+first reading.
+
+ You can supply an empty regexp constant ('//') in all places where a
+regexp is expected. Is this useful? What does it match?
+
+ It is useful. It matches the (invisible) empty string at the start
+and end of a string of characters, as well as the empty string between
+characters. This is best illustrated with the 'gsub()' function, which
+makes global substitutions in a string (*note String Functions::).
+Normal usage of 'gsub()' is like so:
+
+ $ awk '
+ > BEGIN {
+ > x = "ABC_CBA"
+ > gsub(/B/, "bb", x)
+ > print x
+ > }'
+ -| AbbC_CbbA
+
+ We can use 'gsub()' to see where the empty strings are that match the
+empty regexp:
+
+ $ awk '
+ > BEGIN {
+ > x = "ABC"
+ > gsub(//, "x", x)
+ > print x
+ > }'
+ -| xAxBxCx
+
---------- Footnotes ----------
(1) In other literature, you may see a bracket expression referred to
@@ -35893,6 +35926,8 @@ Index
* empty array elements: Reference to Elements.
(line 18)
* empty pattern: Empty. (line 6)
+* empty regexps: Regexp Operator Details.
+ (line 149)
* EMRED: TCP/IP Networking. (line 6)
* enable breakpoint: Breakpoint Control. (line 73)
* enable debugger command: Breakpoint Control. (line 73)
@@ -37344,6 +37379,8 @@ Index
* regexp constants <2>: Comparison Operators.
(line 103)
* regexp constants, as patterns: Expression Patterns. (line 34)
+* regexps, empty: Regexp Operator Details.
+ (line 149)
* register loadable extension: Registration Functions.
(line 6)
* regular expressions, interval expressions and: Options. (line 317)
@@ -37555,6 +37592,8 @@ Index
(line 106)
* sidebar, Escape Sequences for Metacharacters: Escape Sequences.
(line 138)
+* sidebar, What About The Empty Regexp?: Regexp Operator Details.
+ (line 147)
* sidebar, Using \n in Bracket Expressions of Dynamic Regexps: Computed
Regexps.
(line 58)
* sidebar, Caveats When Using Regular Expressions for RS: gawk split records.
@@ -38086,541 +38125,541 @@ Node: Regexp Usage165115
Node: Escape Sequences167152
Node: Regexp Operators173393
Node: Regexp Operator Details173878
-Ref: Regexp Operator Details-Footnote-1180310
-Node: Interval Expressions180457
-Ref: Interval Expressions-Footnote-1181878
-Node: Bracket Expressions181976
-Ref: table-char-classes184452
-Node: Leftmost Longest187778
-Node: Computed Regexps189081
-Node: GNU Regexp Operators192508
-Node: Case-sensitivity196245
-Ref: Case-sensitivity-Footnote-1199111
-Ref: Case-sensitivity-Footnote-2199346
-Node: Regexp Summary199454
-Node: Reading Files200920
-Node: Records203189
-Node: awk split records204264
-Node: gawk split records208964
-Ref: gawk split records-Footnote-1214038
-Node: Fields214075
-Node: Nonconstant Fields216816
-Ref: Nonconstant Fields-Footnote-1219052
-Node: Changing Fields219256
-Node: Field Separators225287
-Node: Default Field Splitting227985
-Node: Regexp Field Splitting229103
-Node: Single Character Fields232780
-Node: Command Line Field Separator233840
-Node: Full Line Fields237058
-Ref: Full Line Fields-Footnote-1238580
-Ref: Full Line Fields-Footnote-2238626
-Node: Field Splitting Summary238727
-Node: Constant Size240801
-Node: Fixed width data241533
-Node: Skipping intervening245000
-Node: Allowing trailing data245798
-Node: Fields with fixed data246835
-Node: Splitting By Content248353
-Ref: Splitting By Content-Footnote-1252136
-Node: More CSV252299
-Node: Testing field creation253891
-Node: Multiple Line255516
-Node: Getline261793
-Node: Plain Getline264262
-Node: Getline/Variable266835
-Node: Getline/File267986
-Node: Getline/Variable/File269374
-Ref: Getline/Variable/File-Footnote-1270979
-Node: Getline/Pipe271067
-Node: Getline/Variable/Pipe273771
-Node: Getline/Coprocess274906
-Node: Getline/Variable/Coprocess276173
-Node: Getline Notes276915
-Node: Getline Summary279712
-Ref: table-getline-variants280136
-Node: Read Timeout280884
-Ref: Read Timeout-Footnote-1284790
-Node: Retrying Input284848
-Node: Command-line directories286047
-Node: Input Summary286953
-Node: Input Exercises290125
-Node: Printing290559
-Node: Print292393
-Node: Print Examples293850
-Node: Output Separators296630
-Node: OFMT298647
-Node: Printf300003
-Node: Basic Printf300788
-Node: Control Letters302362
-Node: Format Modifiers307526
-Node: Printf Examples313541
-Node: Redirection316027
-Node: Special FD322868
-Ref: Special FD-Footnote-1326036
-Node: Special Files326110
-Node: Other Inherited Files326727
-Node: Special Network327728
-Node: Special Caveats328588
-Node: Close Files And Pipes329537
-Ref: table-close-pipe-return-values336444
-Ref: Close Files And Pipes-Footnote-1337257
-Ref: Close Files And Pipes-Footnote-2337405
-Node: Nonfatal337557
-Node: Output Summary339895
-Node: Output Exercises341117
-Node: Expressions341796
-Node: Values342984
-Node: Constants343662
-Node: Scalar Constants344353
-Ref: Scalar Constants-Footnote-1346863
-Node: Nondecimal-numbers347113
-Node: Regexp Constants350114
-Node: Using Constant Regexps350640
-Node: Standard Regexp Constants351262
-Node: Strong Regexp Constants354450
-Node: Variables357462
-Node: Using Variables358119
-Node: Assignment Options360029
-Node: Conversion362500
-Node: Strings And Numbers363024
-Ref: Strings And Numbers-Footnote-1366087
-Node: Locale influences conversions366196
-Ref: table-locale-affects368954
-Node: All Operators369572
-Node: Arithmetic Ops370201
-Node: Concatenation372917
-Ref: Concatenation-Footnote-1375764
-Node: Assignment Ops375871
-Ref: table-assign-ops380862
-Node: Increment Ops382175
-Node: Truth Values and Conditions385635
-Node: Truth Values386709
-Node: Typing and Comparison387757
-Node: Variable Typing388577
-Ref: Variable Typing-Footnote-1395040
-Ref: Variable Typing-Footnote-2395112
-Node: Comparison Operators395189
-Ref: table-relational-ops395608
-Node: POSIX String Comparison399103
-Ref: POSIX String Comparison-Footnote-1400798
-Ref: POSIX String Comparison-Footnote-2400937
-Node: Boolean Ops401021
-Ref: Boolean Ops-Footnote-1405503
-Node: Conditional Exp405595
-Node: Function Calls407331
-Node: Precedence411208
-Node: Locales414867
-Node: Expressions Summary416499
-Node: Patterns and Actions419072
-Node: Pattern Overview420192
-Node: Regexp Patterns421869
-Node: Expression Patterns422411
-Node: Ranges426192
-Node: BEGIN/END429300
-Node: Using BEGIN/END430061
-Ref: Using BEGIN/END-Footnote-1432815
-Node: I/O And BEGIN/END432921
-Node: BEGINFILE/ENDFILE435234
-Node: Empty438465
-Node: Using Shell Variables438782
-Node: Action Overview441056
-Node: Statements443381
-Node: If Statement445229
-Node: While Statement446724
-Node: Do Statement448752
-Node: For Statement449900
-Node: Switch Statement453071
-Node: Break Statement455512
-Node: Continue Statement457604
-Node: Next Statement459431
-Node: Nextfile Statement461814
-Node: Exit Statement464503
-Node: Built-in Variables466906
-Node: User-modified468039
-Node: Auto-set475806
-Ref: Auto-set-Footnote-1492613
-Ref: Auto-set-Footnote-2492819
-Node: ARGC and ARGV492875
-Node: Pattern Action Summary497088
-Node: Arrays499518
-Node: Array Basics500847
-Node: Array Intro501691
-Ref: figure-array-elements503666
-Ref: Array Intro-Footnote-1506370
-Node: Reference to Elements506498
-Node: Assigning Elements508962
-Node: Array Example509453
-Node: Scanning an Array511212
-Node: Controlling Scanning514234
-Ref: Controlling Scanning-Footnote-1520690
-Node: Numeric Array Subscripts521006
-Node: Uninitialized Subscripts523190
-Node: Delete524809
-Ref: Delete-Footnote-1527561
-Node: Multidimensional527618
-Node: Multiscanning530713
-Node: Arrays of Arrays532304
-Node: Arrays Summary537072
-Node: Functions539165
-Node: Built-in540203
-Node: Calling Built-in541284
-Node: Numeric Functions543280
-Ref: Numeric Functions-Footnote-1547308
-Ref: Numeric Functions-Footnote-2547956
-Ref: Numeric Functions-Footnote-3548004
-Node: String Functions548276
-Ref: String Functions-Footnote-1572417
-Ref: String Functions-Footnote-2572545
-Ref: String Functions-Footnote-3572793
-Node: Gory Details572880
-Ref: table-sub-escapes574671
-Ref: table-sub-proposed576190
-Ref: table-posix-sub577553
-Ref: table-gensub-escapes579094
-Ref: Gory Details-Footnote-1579917
-Node: I/O Functions580071
-Ref: table-system-return-values586525
-Ref: I/O Functions-Footnote-1588605
-Ref: I/O Functions-Footnote-2588753
-Node: Time Functions588873
-Ref: Time Functions-Footnote-1599544
-Ref: Time Functions-Footnote-2599612
-Ref: Time Functions-Footnote-3599770
-Ref: Time Functions-Footnote-4599881
-Ref: Time Functions-Footnote-5599993
-Ref: Time Functions-Footnote-6600220
-Node: Bitwise Functions600486
-Ref: table-bitwise-ops601080
-Ref: Bitwise Functions-Footnote-1607143
-Ref: Bitwise Functions-Footnote-2607316
-Node: Type Functions607507
-Node: I18N Functions610370
-Node: User-defined612021
-Node: Definition Syntax612833
-Ref: Definition Syntax-Footnote-1618527
-Node: Function Example618598
-Ref: Function Example-Footnote-1621520
-Node: Function Calling621542
-Node: Calling A Function622130
-Node: Variable Scope623088
-Node: Pass By Value/Reference626082
-Node: Function Caveats628726
-Ref: Function Caveats-Footnote-1630773
-Node: Return Statement630893
-Node: Dynamic Typing633872
-Node: Indirect Calls634802
-Ref: Indirect Calls-Footnote-1645054
-Node: Functions Summary645182
-Node: Library Functions647887
-Ref: Library Functions-Footnote-1651494
-Ref: Library Functions-Footnote-2651637
-Node: Library Names651808
-Ref: Library Names-Footnote-1655475
-Ref: Library Names-Footnote-2655698
-Node: General Functions655784
-Node: Strtonum Function656887
-Node: Assert Function659909
-Node: Round Function663235
-Node: Cliff Random Function664775
-Node: Ordinal Functions665791
-Ref: Ordinal Functions-Footnote-1668854
-Ref: Ordinal Functions-Footnote-2669106
-Node: Join Function669316
-Ref: Join Function-Footnote-1671086
-Node: Getlocaltime Function671286
-Node: Readfile Function675028
-Node: Shell Quoting677005
-Node: Data File Management678406
-Node: Filetrans Function679038
-Node: Rewind Function683134
-Node: File Checking685043
-Ref: File Checking-Footnote-1686377
-Node: Empty Files686578
-Node: Ignoring Assigns688557
-Node: Getopt Function690107
-Ref: Getopt Function-Footnote-1705318
-Node: Passwd Functions705518
-Ref: Passwd Functions-Footnote-1714357
-Node: Group Functions714445
-Ref: Group Functions-Footnote-1722343
-Node: Walking Arrays722550
-Node: Library Functions Summary725558
-Node: Library Exercises726964
-Node: Sample Programs727429
-Node: Running Examples728199
-Node: Clones728927
-Node: Cut Program730151
-Node: Egrep Program740291
-Node: Id Program749292
-Node: Split Program759239
-Ref: Split Program-Footnote-1769129
-Node: Tee Program769302
-Node: Uniq Program772092
-Node: Wc Program779680
-Node: Bytes vs. Characters780077
-Node: Using extensions781625
-Node: wc program782379
-Node: Miscellaneous Programs787244
-Node: Dupword Program788457
-Node: Alarm Program790487
-Node: Translate Program795342
-Ref: Translate Program-Footnote-1799907
-Node: Labels Program800177
-Ref: Labels Program-Footnote-1803528
-Node: Word Sorting803612
-Node: History Sorting807684
-Node: Extract Program809909
-Node: Simple Sed817963
-Node: Igawk Program821037
-Ref: Igawk Program-Footnote-1835368
-Ref: Igawk Program-Footnote-2835570
-Ref: Igawk Program-Footnote-3835692
-Node: Anagram Program835807
-Node: Signature Program838869
-Node: Programs Summary840116
-Node: Programs Exercises841330
-Ref: Programs Exercises-Footnote-1845460
-Node: Advanced Features845546
-Node: Nondecimal Data847613
-Node: Array Sorting849204
-Node: Controlling Array Traversal849904
-Ref: Controlling Array Traversal-Footnote-1858272
-Node: Array Sorting Functions858390
-Ref: Array Sorting Functions-Footnote-1863481
-Node: Two-way I/O863677
-Ref: Two-way I/O-Footnote-1871398
-Ref: Two-way I/O-Footnote-2871585
-Node: TCP/IP Networking871667
-Node: Profiling874785
-Node: Extension Philosophy884094
-Node: Advanced Features Summary885573
-Node: Internationalization887588
-Node: I18N and L10N889068
-Node: Explaining gettext889755
-Ref: Explaining gettext-Footnote-1895647
-Ref: Explaining gettext-Footnote-2895832
-Node: Programmer i18n895997
-Ref: Programmer i18n-Footnote-1900946
-Node: Translator i18n900995
-Node: String Extraction901789
-Ref: String Extraction-Footnote-1902921
-Node: Printf Ordering903007
-Ref: Printf Ordering-Footnote-1905793
-Node: I18N Portability905857
-Ref: I18N Portability-Footnote-1908313
-Node: I18N Example908376
-Ref: I18N Example-Footnote-1911651
-Ref: I18N Example-Footnote-2911724
-Node: Gawk I18N911833
-Node: I18N Summary912482
-Node: Debugger913823
-Node: Debugging914823
-Node: Debugging Concepts915264
-Node: Debugging Terms917073
-Node: Awk Debugging919648
-Ref: Awk Debugging-Footnote-1920593
-Node: Sample Debugging Session920725
-Node: Debugger Invocation921259
-Node: Finding The Bug922645
-Node: List of Debugger Commands929119
-Node: Breakpoint Control930452
-Node: Debugger Execution Control934146
-Node: Viewing And Changing Data937508
-Node: Execution Stack941049
-Node: Debugger Info942686
-Node: Miscellaneous Debugger Commands946757
-Node: Readline Support951819
-Node: Limitations952715
-Node: Debugging Summary955269
-Node: Namespaces956548
-Node: Global Namespace957659
-Node: Qualified Names959057
-Node: Default Namespace960056
-Node: Changing The Namespace960797
-Node: Naming Rules962411
-Node: Internal Name Management964259
-Node: Namespace Example965301
-Node: Namespace And Features967863
-Node: Namespace Summary969298
-Node: Arbitrary Precision Arithmetic970775
-Node: Computer Arithmetic972262
-Ref: table-numeric-ranges976028
-Ref: table-floating-point-ranges976521
-Ref: Computer Arithmetic-Footnote-1977179
-Node: Math Definitions977236
-Ref: table-ieee-formats980552
-Ref: Math Definitions-Footnote-1981155
-Node: MPFR features981260
-Node: FP Math Caution982978
-Ref: FP Math Caution-Footnote-1984050
-Node: Inexactness of computations984419
-Node: Inexact representation985379
-Node: Comparing FP Values986739
-Node: Errors accumulate987980
-Node: Getting Accuracy989413
-Node: Try To Round992123
-Node: Setting precision993022
-Ref: table-predefined-precision-strings993719
-Node: Setting the rounding mode995549
-Ref: table-gawk-rounding-modes995923
-Ref: Setting the rounding mode-Footnote-1999854
-Node: Arbitrary Precision Integers1000033
-Ref: Arbitrary Precision Integers-Footnote-11003208
-Node: Checking for MPFR1003357
-Node: POSIX Floating Point Problems1004831
-Ref: POSIX Floating Point Problems-Footnote-11009116
-Node: Floating point summary1009154
-Node: Dynamic Extensions1011344
-Node: Extension Intro1012897
-Node: Plugin License1014163
-Node: Extension Mechanism Outline1014960
-Ref: figure-load-extension1015399
-Ref: figure-register-new-function1016964
-Ref: figure-call-new-function1018056
-Node: Extension API Description1020118
-Node: Extension API Functions Introduction1021831
-Ref: table-api-std-headers1023667
-Node: General Data Types1027916
-Ref: General Data Types-Footnote-11036546
-Node: Memory Allocation Functions1036845
-Ref: Memory Allocation Functions-Footnote-11041346
-Node: Constructor Functions1041445
-Node: API Ownership of MPFR and GMP Values1044911
-Node: Registration Functions1046224
-Node: Extension Functions1046924
-Node: Exit Callback Functions1052246
-Node: Extension Version String1053496
-Node: Input Parsers1054159
-Node: Output Wrappers1066880
-Node: Two-way processors1071392
-Node: Printing Messages1073657
-Ref: Printing Messages-Footnote-11074828
-Node: Updating ERRNO1074981
-Node: Requesting Values1075720
-Ref: table-value-types-returned1076457
-Node: Accessing Parameters1077393
-Node: Symbol Table Access1078630
-Node: Symbol table by name1079142
-Ref: Symbol table by name-Footnote-11082166
-Node: Symbol table by cookie1082294
-Ref: Symbol table by cookie-Footnote-11086479
-Node: Cached values1086543
-Ref: Cached values-Footnote-11090079
-Node: Array Manipulation1090232
-Ref: Array Manipulation-Footnote-11091323
-Node: Array Data Types1091360
-Ref: Array Data Types-Footnote-11094018
-Node: Array Functions1094110
-Node: Flattening Arrays1098608
-Node: Creating Arrays1105584
-Node: Redirection API1110351
-Node: Extension API Variables1113184
-Node: Extension Versioning1113895
-Ref: gawk-api-version1114324
-Node: Extension GMP/MPFR Versioning1116055
-Node: Extension API Informational Variables1117683
-Node: Extension API Boilerplate1118756
-Node: Changes from API V11122730
-Node: Finding Extensions1124302
-Node: Extension Example1124861
-Node: Internal File Description1125659
-Node: Internal File Ops1129739
-Ref: Internal File Ops-Footnote-11141089
-Node: Using Internal File Ops1141229
-Ref: Using Internal File Ops-Footnote-11143612
-Node: Extension Samples1143886
-Node: Extension Sample File Functions1145415
-Node: Extension Sample Fnmatch1153064
-Node: Extension Sample Fork1154551
-Node: Extension Sample Inplace1155769
-Node: Extension Sample Ord1159395
-Node: Extension Sample Readdir1160231
-Ref: table-readdir-file-types1161120
-Node: Extension Sample Revout1162187
-Node: Extension Sample Rev2way1162776
-Node: Extension Sample Read write array1163516
-Node: Extension Sample Readfile1165458
-Node: Extension Sample Time1166553
-Node: Extension Sample API Tests1168305
-Node: gawkextlib1168797
-Node: Extension summary1171715
-Node: Extension Exercises1175417
-Node: Language History1176659
-Node: V7/SVR3.11178315
-Node: SVR41180467
-Node: POSIX1181901
-Node: BTL1183282
-Node: POSIX/GNU1184011
-Node: Feature History1189789
-Node: Common Extensions1206108
-Node: Ranges and Locales1207391
-Ref: Ranges and Locales-Footnote-11212007
-Ref: Ranges and Locales-Footnote-21212034
-Ref: Ranges and Locales-Footnote-31212269
-Node: Contributors1212492
-Node: History summary1218489
-Node: Installation1219869
-Node: Gawk Distribution1220813
-Node: Getting1221297
-Node: Extracting1222260
-Node: Distribution contents1223898
-Node: Unix Installation1230378
-Node: Quick Installation1231060
-Node: Shell Startup Files1233474
-Node: Additional Configuration Options1234563
-Node: Configuration Philosophy1236878
-Node: Non-Unix Installation1239247
-Node: PC Installation1239707
-Node: PC Binary Installation1240545
-Node: PC Compiling1240980
-Node: PC Using1242097
-Node: Cygwin1245650
-Node: MSYS1246874
-Node: VMS Installation1247476
-Node: VMS Compilation1248267
-Ref: VMS Compilation-Footnote-11249496
-Node: VMS Dynamic Extensions1249554
-Node: VMS Installation Details1251239
-Node: VMS Running1253492
-Node: VMS GNV1257771
-Node: VMS Old Gawk1258506
-Node: Bugs1258977
-Node: Bug address1259640
-Node: Usenet1262622
-Node: Maintainers1263626
-Node: Other Versions1264811
-Node: Installation summary1272676
-Node: Notes1273885
-Node: Compatibility Mode1274679
-Node: Additions1275461
-Node: Accessing The Source1276386
-Node: Adding Code1277823
-Node: New Ports1284042
-Node: Derived Files1288417
-Ref: Derived Files-Footnote-11294077
-Ref: Derived Files-Footnote-21294112
-Ref: Derived Files-Footnote-31294710
-Node: Future Extensions1294824
-Node: Implementation Limitations1295482
-Node: Extension Design1296692
-Node: Old Extension Problems1297836
-Ref: Old Extension Problems-Footnote-11299354
-Node: Extension New Mechanism Goals1299411
-Ref: Extension New Mechanism Goals-Footnote-11302775
-Node: Extension Other Design Decisions1302964
-Node: Extension Future Growth1305077
-Node: Notes summary1305683
-Node: Basic Concepts1306841
-Node: Basic High Level1307522
-Ref: figure-general-flow1307804
-Ref: figure-process-flow1308489
-Ref: Basic High Level-Footnote-11311790
-Node: Basic Data Typing1311975
-Node: Glossary1315303
-Node: Copying1347188
-Node: GNU Free Documentation License1384731
-Node: Index1409851
+Ref: Regexp Operator Details-Footnote-1181242
+Node: Interval Expressions181389
+Ref: Interval Expressions-Footnote-1182810
+Node: Bracket Expressions182908
+Ref: table-char-classes185384
+Node: Leftmost Longest188710
+Node: Computed Regexps190013
+Node: GNU Regexp Operators193440
+Node: Case-sensitivity197177
+Ref: Case-sensitivity-Footnote-1200043
+Ref: Case-sensitivity-Footnote-2200278
+Node: Regexp Summary200386
+Node: Reading Files201852
+Node: Records204121
+Node: awk split records205196
+Node: gawk split records209896
+Ref: gawk split records-Footnote-1214970
+Node: Fields215007
+Node: Nonconstant Fields217748
+Ref: Nonconstant Fields-Footnote-1219984
+Node: Changing Fields220188
+Node: Field Separators226219
+Node: Default Field Splitting228917
+Node: Regexp Field Splitting230035
+Node: Single Character Fields233712
+Node: Command Line Field Separator234772
+Node: Full Line Fields237990
+Ref: Full Line Fields-Footnote-1239512
+Ref: Full Line Fields-Footnote-2239558
+Node: Field Splitting Summary239659
+Node: Constant Size241733
+Node: Fixed width data242465
+Node: Skipping intervening245932
+Node: Allowing trailing data246730
+Node: Fields with fixed data247767
+Node: Splitting By Content249285
+Ref: Splitting By Content-Footnote-1253068
+Node: More CSV253231
+Node: Testing field creation254823
+Node: Multiple Line256448
+Node: Getline262725
+Node: Plain Getline265194
+Node: Getline/Variable267767
+Node: Getline/File268918
+Node: Getline/Variable/File270306
+Ref: Getline/Variable/File-Footnote-1271911
+Node: Getline/Pipe271999
+Node: Getline/Variable/Pipe274703
+Node: Getline/Coprocess275838
+Node: Getline/Variable/Coprocess277105
+Node: Getline Notes277847
+Node: Getline Summary280644
+Ref: table-getline-variants281068
+Node: Read Timeout281816
+Ref: Read Timeout-Footnote-1285722
+Node: Retrying Input285780
+Node: Command-line directories286979
+Node: Input Summary287885
+Node: Input Exercises291057
+Node: Printing291491
+Node: Print293325
+Node: Print Examples294782
+Node: Output Separators297562
+Node: OFMT299579
+Node: Printf300935
+Node: Basic Printf301720
+Node: Control Letters303294
+Node: Format Modifiers308458
+Node: Printf Examples314473
+Node: Redirection316959
+Node: Special FD323800
+Ref: Special FD-Footnote-1326968
+Node: Special Files327042
+Node: Other Inherited Files327659
+Node: Special Network328660
+Node: Special Caveats329520
+Node: Close Files And Pipes330469
+Ref: table-close-pipe-return-values337376
+Ref: Close Files And Pipes-Footnote-1338189
+Ref: Close Files And Pipes-Footnote-2338337
+Node: Nonfatal338489
+Node: Output Summary340827
+Node: Output Exercises342049
+Node: Expressions342728
+Node: Values343916
+Node: Constants344594
+Node: Scalar Constants345285
+Ref: Scalar Constants-Footnote-1347795
+Node: Nondecimal-numbers348045
+Node: Regexp Constants351046
+Node: Using Constant Regexps351572
+Node: Standard Regexp Constants352194
+Node: Strong Regexp Constants355382
+Node: Variables358394
+Node: Using Variables359051
+Node: Assignment Options360961
+Node: Conversion363432
+Node: Strings And Numbers363956
+Ref: Strings And Numbers-Footnote-1367019
+Node: Locale influences conversions367128
+Ref: table-locale-affects369886
+Node: All Operators370504
+Node: Arithmetic Ops371133
+Node: Concatenation373849
+Ref: Concatenation-Footnote-1376696
+Node: Assignment Ops376803
+Ref: table-assign-ops381794
+Node: Increment Ops383107
+Node: Truth Values and Conditions386567
+Node: Truth Values387641
+Node: Typing and Comparison388689
+Node: Variable Typing389509
+Ref: Variable Typing-Footnote-1395972
+Ref: Variable Typing-Footnote-2396044
+Node: Comparison Operators396121
+Ref: table-relational-ops396540
+Node: POSIX String Comparison400035
+Ref: POSIX String Comparison-Footnote-1401730
+Ref: POSIX String Comparison-Footnote-2401869
+Node: Boolean Ops401953
+Ref: Boolean Ops-Footnote-1406435
+Node: Conditional Exp406527
+Node: Function Calls408263
+Node: Precedence412140
+Node: Locales415799
+Node: Expressions Summary417431
+Node: Patterns and Actions420004
+Node: Pattern Overview421124
+Node: Regexp Patterns422801
+Node: Expression Patterns423343
+Node: Ranges427124
+Node: BEGIN/END430232
+Node: Using BEGIN/END430993
+Ref: Using BEGIN/END-Footnote-1433747
+Node: I/O And BEGIN/END433853
+Node: BEGINFILE/ENDFILE436166
+Node: Empty439397
+Node: Using Shell Variables439714
+Node: Action Overview441988
+Node: Statements444313
+Node: If Statement446161
+Node: While Statement447656
+Node: Do Statement449684
+Node: For Statement450832
+Node: Switch Statement454003
+Node: Break Statement456444
+Node: Continue Statement458536
+Node: Next Statement460363
+Node: Nextfile Statement462746
+Node: Exit Statement465435
+Node: Built-in Variables467838
+Node: User-modified468971
+Node: Auto-set476738
+Ref: Auto-set-Footnote-1493545
+Ref: Auto-set-Footnote-2493751
+Node: ARGC and ARGV493807
+Node: Pattern Action Summary498020
+Node: Arrays500450
+Node: Array Basics501779
+Node: Array Intro502623
+Ref: figure-array-elements504598
+Ref: Array Intro-Footnote-1507302
+Node: Reference to Elements507430
+Node: Assigning Elements509894
+Node: Array Example510385
+Node: Scanning an Array512144
+Node: Controlling Scanning515166
+Ref: Controlling Scanning-Footnote-1521622
+Node: Numeric Array Subscripts521938
+Node: Uninitialized Subscripts524122
+Node: Delete525741
+Ref: Delete-Footnote-1528493
+Node: Multidimensional528550
+Node: Multiscanning531645
+Node: Arrays of Arrays533236
+Node: Arrays Summary538004
+Node: Functions540097
+Node: Built-in541135
+Node: Calling Built-in542216
+Node: Numeric Functions544212
+Ref: Numeric Functions-Footnote-1548240
+Ref: Numeric Functions-Footnote-2548888
+Ref: Numeric Functions-Footnote-3548936
+Node: String Functions549208
+Ref: String Functions-Footnote-1573349
+Ref: String Functions-Footnote-2573477
+Ref: String Functions-Footnote-3573725
+Node: Gory Details573812
+Ref: table-sub-escapes575603
+Ref: table-sub-proposed577122
+Ref: table-posix-sub578485
+Ref: table-gensub-escapes580026
+Ref: Gory Details-Footnote-1580849
+Node: I/O Functions581003
+Ref: table-system-return-values587457
+Ref: I/O Functions-Footnote-1589537
+Ref: I/O Functions-Footnote-2589685
+Node: Time Functions589805
+Ref: Time Functions-Footnote-1600476
+Ref: Time Functions-Footnote-2600544
+Ref: Time Functions-Footnote-3600702
+Ref: Time Functions-Footnote-4600813
+Ref: Time Functions-Footnote-5600925
+Ref: Time Functions-Footnote-6601152
+Node: Bitwise Functions601418
+Ref: table-bitwise-ops602012
+Ref: Bitwise Functions-Footnote-1608075
+Ref: Bitwise Functions-Footnote-2608248
+Node: Type Functions608439
+Node: I18N Functions611302
+Node: User-defined612953
+Node: Definition Syntax613765
+Ref: Definition Syntax-Footnote-1619459
+Node: Function Example619530
+Ref: Function Example-Footnote-1622452
+Node: Function Calling622474
+Node: Calling A Function623062
+Node: Variable Scope624020
+Node: Pass By Value/Reference627014
+Node: Function Caveats629658
+Ref: Function Caveats-Footnote-1631705
+Node: Return Statement631825
+Node: Dynamic Typing634804
+Node: Indirect Calls635734
+Ref: Indirect Calls-Footnote-1645986
+Node: Functions Summary646114
+Node: Library Functions648819
+Ref: Library Functions-Footnote-1652426
+Ref: Library Functions-Footnote-2652569
+Node: Library Names652740
+Ref: Library Names-Footnote-1656407
+Ref: Library Names-Footnote-2656630
+Node: General Functions656716
+Node: Strtonum Function657819
+Node: Assert Function660841
+Node: Round Function664167
+Node: Cliff Random Function665707
+Node: Ordinal Functions666723
+Ref: Ordinal Functions-Footnote-1669786
+Ref: Ordinal Functions-Footnote-2670038
+Node: Join Function670248
+Ref: Join Function-Footnote-1672018
+Node: Getlocaltime Function672218
+Node: Readfile Function675960
+Node: Shell Quoting677937
+Node: Data File Management679338
+Node: Filetrans Function679970
+Node: Rewind Function684066
+Node: File Checking685975
+Ref: File Checking-Footnote-1687309
+Node: Empty Files687510
+Node: Ignoring Assigns689489
+Node: Getopt Function691039
+Ref: Getopt Function-Footnote-1706250
+Node: Passwd Functions706450
+Ref: Passwd Functions-Footnote-1715289
+Node: Group Functions715377
+Ref: Group Functions-Footnote-1723275
+Node: Walking Arrays723482
+Node: Library Functions Summary726490
+Node: Library Exercises727896
+Node: Sample Programs728361
+Node: Running Examples729131
+Node: Clones729859
+Node: Cut Program731083
+Node: Egrep Program741223
+Node: Id Program750224
+Node: Split Program760171
+Ref: Split Program-Footnote-1770061
+Node: Tee Program770234
+Node: Uniq Program773024
+Node: Wc Program780612
+Node: Bytes vs. Characters781009
+Node: Using extensions782557
+Node: wc program783311
+Node: Miscellaneous Programs788176
+Node: Dupword Program789389
+Node: Alarm Program791419
+Node: Translate Program796274
+Ref: Translate Program-Footnote-1800839
+Node: Labels Program801109
+Ref: Labels Program-Footnote-1804460
+Node: Word Sorting804544
+Node: History Sorting808616
+Node: Extract Program810841
+Node: Simple Sed818895
+Node: Igawk Program821969
+Ref: Igawk Program-Footnote-1836300
+Ref: Igawk Program-Footnote-2836502
+Ref: Igawk Program-Footnote-3836624
+Node: Anagram Program836739
+Node: Signature Program839801
+Node: Programs Summary841048
+Node: Programs Exercises842262
+Ref: Programs Exercises-Footnote-1846392
+Node: Advanced Features846478
+Node: Nondecimal Data848545
+Node: Array Sorting850136
+Node: Controlling Array Traversal850836
+Ref: Controlling Array Traversal-Footnote-1859204
+Node: Array Sorting Functions859322
+Ref: Array Sorting Functions-Footnote-1864413
+Node: Two-way I/O864609
+Ref: Two-way I/O-Footnote-1872330
+Ref: Two-way I/O-Footnote-2872517
+Node: TCP/IP Networking872599
+Node: Profiling875717
+Node: Extension Philosophy885026
+Node: Advanced Features Summary886505
+Node: Internationalization888520
+Node: I18N and L10N890000
+Node: Explaining gettext890687
+Ref: Explaining gettext-Footnote-1896579
+Ref: Explaining gettext-Footnote-2896764
+Node: Programmer i18n896929
+Ref: Programmer i18n-Footnote-1901878
+Node: Translator i18n901927
+Node: String Extraction902721
+Ref: String Extraction-Footnote-1903853
+Node: Printf Ordering903939
+Ref: Printf Ordering-Footnote-1906725
+Node: I18N Portability906789
+Ref: I18N Portability-Footnote-1909245
+Node: I18N Example909308
+Ref: I18N Example-Footnote-1912583
+Ref: I18N Example-Footnote-2912656
+Node: Gawk I18N912765
+Node: I18N Summary913414
+Node: Debugger914755
+Node: Debugging915755
+Node: Debugging Concepts916196
+Node: Debugging Terms918005
+Node: Awk Debugging920580
+Ref: Awk Debugging-Footnote-1921525
+Node: Sample Debugging Session921657
+Node: Debugger Invocation922191
+Node: Finding The Bug923577
+Node: List of Debugger Commands930051
+Node: Breakpoint Control931384
+Node: Debugger Execution Control935078
+Node: Viewing And Changing Data938440
+Node: Execution Stack941981
+Node: Debugger Info943618
+Node: Miscellaneous Debugger Commands947689
+Node: Readline Support952751
+Node: Limitations953647
+Node: Debugging Summary956201
+Node: Namespaces957480
+Node: Global Namespace958591
+Node: Qualified Names959989
+Node: Default Namespace960988
+Node: Changing The Namespace961729
+Node: Naming Rules963343
+Node: Internal Name Management965191
+Node: Namespace Example966233
+Node: Namespace And Features968795
+Node: Namespace Summary970230
+Node: Arbitrary Precision Arithmetic971707
+Node: Computer Arithmetic973194
+Ref: table-numeric-ranges976960
+Ref: table-floating-point-ranges977453
+Ref: Computer Arithmetic-Footnote-1978111
+Node: Math Definitions978168
+Ref: table-ieee-formats981484
+Ref: Math Definitions-Footnote-1982087
+Node: MPFR features982192
+Node: FP Math Caution983910
+Ref: FP Math Caution-Footnote-1984982
+Node: Inexactness of computations985351
+Node: Inexact representation986311
+Node: Comparing FP Values987671
+Node: Errors accumulate988912
+Node: Getting Accuracy990345
+Node: Try To Round993055
+Node: Setting precision993954
+Ref: table-predefined-precision-strings994651
+Node: Setting the rounding mode996481
+Ref: table-gawk-rounding-modes996855
+Ref: Setting the rounding mode-Footnote-11000786
+Node: Arbitrary Precision Integers1000965
+Ref: Arbitrary Precision Integers-Footnote-11004140
+Node: Checking for MPFR1004289
+Node: POSIX Floating Point Problems1005763
+Ref: POSIX Floating Point Problems-Footnote-11010048
+Node: Floating point summary1010086
+Node: Dynamic Extensions1012276
+Node: Extension Intro1013829
+Node: Plugin License1015095
+Node: Extension Mechanism Outline1015892
+Ref: figure-load-extension1016331
+Ref: figure-register-new-function1017896
+Ref: figure-call-new-function1018988
+Node: Extension API Description1021050
+Node: Extension API Functions Introduction1022763
+Ref: table-api-std-headers1024599
+Node: General Data Types1028848
+Ref: General Data Types-Footnote-11037478
+Node: Memory Allocation Functions1037777
+Ref: Memory Allocation Functions-Footnote-11042278
+Node: Constructor Functions1042377
+Node: API Ownership of MPFR and GMP Values1045843
+Node: Registration Functions1047156
+Node: Extension Functions1047856
+Node: Exit Callback Functions1053178
+Node: Extension Version String1054428
+Node: Input Parsers1055091
+Node: Output Wrappers1067812
+Node: Two-way processors1072324
+Node: Printing Messages1074589
+Ref: Printing Messages-Footnote-11075760
+Node: Updating ERRNO1075913
+Node: Requesting Values1076652
+Ref: table-value-types-returned1077389
+Node: Accessing Parameters1078325
+Node: Symbol Table Access1079562
+Node: Symbol table by name1080074
+Ref: Symbol table by name-Footnote-11083098
+Node: Symbol table by cookie1083226
+Ref: Symbol table by cookie-Footnote-11087411
+Node: Cached values1087475
+Ref: Cached values-Footnote-11091011
+Node: Array Manipulation1091164
+Ref: Array Manipulation-Footnote-11092255
+Node: Array Data Types1092292
+Ref: Array Data Types-Footnote-11094950
+Node: Array Functions1095042
+Node: Flattening Arrays1099540
+Node: Creating Arrays1106516
+Node: Redirection API1111283
+Node: Extension API Variables1114116
+Node: Extension Versioning1114827
+Ref: gawk-api-version1115256
+Node: Extension GMP/MPFR Versioning1116987
+Node: Extension API Informational Variables1118615
+Node: Extension API Boilerplate1119688
+Node: Changes from API V11123662
+Node: Finding Extensions1125234
+Node: Extension Example1125793
+Node: Internal File Description1126591
+Node: Internal File Ops1130671
+Ref: Internal File Ops-Footnote-11142021
+Node: Using Internal File Ops1142161
+Ref: Using Internal File Ops-Footnote-11144544
+Node: Extension Samples1144818
+Node: Extension Sample File Functions1146347
+Node: Extension Sample Fnmatch1153996
+Node: Extension Sample Fork1155483
+Node: Extension Sample Inplace1156701
+Node: Extension Sample Ord1160327
+Node: Extension Sample Readdir1161163
+Ref: table-readdir-file-types1162052
+Node: Extension Sample Revout1163119
+Node: Extension Sample Rev2way1163708
+Node: Extension Sample Read write array1164448
+Node: Extension Sample Readfile1166390
+Node: Extension Sample Time1167485
+Node: Extension Sample API Tests1169237
+Node: gawkextlib1169729
+Node: Extension summary1172647
+Node: Extension Exercises1176349
+Node: Language History1177591
+Node: V7/SVR3.11179247
+Node: SVR41181399
+Node: POSIX1182833
+Node: BTL1184214
+Node: POSIX/GNU1184943
+Node: Feature History1190721
+Node: Common Extensions1207040
+Node: Ranges and Locales1208323
+Ref: Ranges and Locales-Footnote-11212939
+Ref: Ranges and Locales-Footnote-21212966
+Ref: Ranges and Locales-Footnote-31213201
+Node: Contributors1213424
+Node: History summary1219421
+Node: Installation1220801
+Node: Gawk Distribution1221745
+Node: Getting1222229
+Node: Extracting1223192
+Node: Distribution contents1224830
+Node: Unix Installation1231310
+Node: Quick Installation1231992
+Node: Shell Startup Files1234406
+Node: Additional Configuration Options1235495
+Node: Configuration Philosophy1237810
+Node: Non-Unix Installation1240179
+Node: PC Installation1240639
+Node: PC Binary Installation1241477
+Node: PC Compiling1241912
+Node: PC Using1243029
+Node: Cygwin1246582
+Node: MSYS1247806
+Node: VMS Installation1248408
+Node: VMS Compilation1249199
+Ref: VMS Compilation-Footnote-11250428
+Node: VMS Dynamic Extensions1250486
+Node: VMS Installation Details1252171
+Node: VMS Running1254424
+Node: VMS GNV1258703
+Node: VMS Old Gawk1259438
+Node: Bugs1259909
+Node: Bug address1260572
+Node: Usenet1263554
+Node: Maintainers1264558
+Node: Other Versions1265743
+Node: Installation summary1273608
+Node: Notes1274817
+Node: Compatibility Mode1275611
+Node: Additions1276393
+Node: Accessing The Source1277318
+Node: Adding Code1278755
+Node: New Ports1284974
+Node: Derived Files1289349
+Ref: Derived Files-Footnote-11295009
+Ref: Derived Files-Footnote-21295044
+Ref: Derived Files-Footnote-31295642
+Node: Future Extensions1295756
+Node: Implementation Limitations1296414
+Node: Extension Design1297624
+Node: Old Extension Problems1298768
+Ref: Old Extension Problems-Footnote-11300286
+Node: Extension New Mechanism Goals1300343
+Ref: Extension New Mechanism Goals-Footnote-11303707
+Node: Extension Other Design Decisions1303896
+Node: Extension Future Growth1306009
+Node: Notes summary1306615
+Node: Basic Concepts1307773
+Node: Basic High Level1308454
+Ref: figure-general-flow1308736
+Ref: figure-process-flow1309421
+Ref: Basic High Level-Footnote-11312722
+Node: Basic Data Typing1312907
+Node: Glossary1316235
+Node: Copying1348120
+Node: GNU Free Documentation License1385663
+Node: Index1410783
End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index c208eca..7a746e1 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -5965,6 +5965,100 @@ regexp that precedes them. For example, @code{/+/}
matches a literal
plus sign. However, many other versions of @command{awk} treat such a
usage as a syntax error.
+@cindex sidebar @subentry What About The Empty Regexp?
+@ifdocbook
+@docbook
+<sidebar><title>What About The Empty Regexp?</title>
+@end docbook
+
+@cindex empty regexps
+@cindex regexps, empty
+We describe here an advanced regexp usage. Feel free to skip it
+upon first reading.
+
+You can supply an empty regexp constant (@samp{//}) in all places
+where a regexp is expected. Is this useful? What does it match?
+
+It is useful. It matches the (invisible) empty string at the start
+and end of a string of characters, as well as the empty string
+between characters. This is best illustrated with the @code{gsub()}
+function, which makes global substitutions in a string
+(@pxref{String Functions}). Normal usage of @code{gsub()} is like
+so:
+
+@example
+$ @kbd{awk '}
+> @kbd{BEGIN @{}
+> @kbd{ x = "ABC_CBA"}
+> @kbd{ gsub(/B/, "bb", x)}
+> @kbd{ print x}
+> @kbd{@}'}
+@print{} AbbC_CbbA
+@end example
+
+We can use @code{gsub()} to see where the empty strings
+are that match the empty regexp:
+
+@example
+$ @kbd{awk '}
+> @kbd{BEGIN @{}
+> @kbd{ x = "ABC"}
+> @kbd{ gsub(//, "x", x)}
+> @kbd{ print x}
+> @kbd{@}'}
+@print{} xAxBxCx
+@end example
+
+@docbook
+</sidebar>
+@end docbook
+@end ifdocbook
+
+@ifnotdocbook
+@cartouche
+@center @b{What About The Empty Regexp?}
+
+
+@cindex empty regexps
+@cindex regexps, empty
+We describe here an advanced regexp usage. Feel free to skip it
+upon first reading.
+
+You can supply an empty regexp constant (@samp{//}) in all places
+where a regexp is expected. Is this useful? What does it match?
+
+It is useful. It matches the (invisible) empty string at the start
+and end of a string of characters, as well as the empty string
+between characters. This is best illustrated with the @code{gsub()}
+function, which makes global substitutions in a string
+(@pxref{String Functions}). Normal usage of @code{gsub()} is like
+so:
+
+@example
+$ @kbd{awk '}
+> @kbd{BEGIN @{}
+> @kbd{ x = "ABC_CBA"}
+> @kbd{ gsub(/B/, "bb", x)}
+> @kbd{ print x}
+> @kbd{@}'}
+@print{} AbbC_CbbA
+@end example
+
+We can use @code{gsub()} to see where the empty strings
+are that match the empty regexp:
+
+@example
+$ @kbd{awk '}
+> @kbd{BEGIN @{}
+> @kbd{ x = "ABC"}
+> @kbd{ gsub(//, "x", x)}
+> @kbd{ print x}
+> @kbd{@}'}
+@print{} xAxBxCx
+@end example
+@end cartouche
+@end ifnotdocbook
+
@node Interval Expressions
@subsection Some Notes On Interval Expressions
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index 6ad9d6e..a8c1cf8 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -5747,6 +5747,46 @@ regexp that precedes them. For example, @code{/+/}
matches a literal
plus sign. However, many other versions of @command{awk} treat such a
usage as a syntax error.
+@sidebar What About The Empty Regexp?
+@cindex empty regexps
+@cindex regexps, empty
+We describe here an advanced regexp usage. Feel free to skip it
+upon first reading.
+
+You can supply an empty regexp constant (@samp{//}) in all places
+where a regexp is expected. Is this useful? What does it match?
+
+It is useful. It matches the (invisible) empty string at the start
+and end of a string of characters, as well as the empty string
+between characters. This is best illustrated with the @code{gsub()}
+function, which makes global substitutions in a string
+(@pxref{String Functions}). Normal usage of @code{gsub()} is like
+so:
+
+@example
+$ @kbd{awk '}
+> @kbd{BEGIN @{}
+> @kbd{ x = "ABC_CBA"}
+> @kbd{ gsub(/B/, "bb", x)}
+> @kbd{ print x}
+> @kbd{@}'}
+@print{} AbbC_CbbA
+@end example
+
+We can use @code{gsub()} to see where the empty strings
+are that match the empty regexp:
+
+@example
+$ @kbd{awk '}
+> @kbd{BEGIN @{}
+> @kbd{ x = "ABC"}
+> @kbd{ gsub(//, "x", x)}
+> @kbd{ print x}
+> @kbd{@}'}
+@print{} xAxBxCx
+@end example
+@end sidebar
+
@node Interval Expressions
@subsection Some Notes On Interval Expressions
-----------------------------------------------------------------------
Summary of changes:
doc/ChangeLog | 7 +
doc/gawk.info | 1109 ++++++++++++++++++++++++++++---------------------------
doc/gawk.texi | 94 +++++
doc/gawktexi.in | 40 ++
4 files changed, 715 insertions(+), 535 deletions(-)
hooks/post-receive
--
gawk
| [Prev in Thread] |
Current Thread |
[Next in Thread] |
- [SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4215-g8acf99e,
Arnold Robbins <=