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[SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4319-g99a610a
From: |
Arnold Robbins |
Subject: |
[SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4319-g99a610a |
Date: |
Fri, 1 Oct 2021 03:18:33 -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 99a610a84bb5f25e8105f65d928a772da3a66d5f (commit)
from b119426eb9db950752533dd410710a6389ee633a (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=99a610a84bb5f25e8105f65d928a772da3a66d5f
commit 99a610a84bb5f25e8105f65d928a772da3a66d5f
Author: Arnold D. Robbins <arnold@skeeve.com>
Date: Fri Oct 1 10:17:59 2021 +0300
Doc update.
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 361de52..7a1f8c6 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,8 @@
+2021-10-01 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawktexi.in: Clarify typeof() usage with array elements
+ created by reference.
+
2021-09-27 Arnold D. Robbins <arnold@skeeve.com>
* gawktexi.in: Small cleanups from Antonio Columbo. General
diff --git a/doc/gawk.info b/doc/gawk.info
index 671c67c..1c7dfa2 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -14525,6 +14525,23 @@ function causes it to become a scalar variable
(unassigned). However,
'isarray()' and 'typeof()' are different; they do not change their
arguments from untyped to unassigned.
+ By "variable" we mean one denoted by a simple identifier. Array
+elements that come into existence simply by referencing them are
+different, they are automatically forced to be scalars. Consider:
+
+ $ gawk 'BEGIN { print typeof(x) }'
+ -| untyped
+ $ gawk 'BEGIN { print typeof(x["foo"]) }'
+ -| unassigned
+
+'x[0]' comes into existence before it is passed to 'typeof()';
+'typeof()' cannot tell that it didn't exist prior to being called.
+(d.c.)
+
+ This may change in a future release, whereby 'gawk' would allow such
+an unassigned array element to be used for a multidimensional array, and
+not remain a scalar forever (or until deleted).
+
File: gawk.info, Node: I18N Functions, Prev: Type Functions, Up: Built-in
@@ -36021,6 +36038,8 @@ Index
(line 179)
* dark corner, length() function: String Functions. (line 201)
* dark corner, split() function: String Functions. (line 380)
+* dark corner, array elements created by reference: Type Functions.
+ (line 85)
* dark corner, parameter name restrictions: Definition Syntax.
(line 44)
* dark corner <1>: Glossary. (line 266)
@@ -38762,338 +38781,338 @@ Ref: table-bitwise-ops604559
Ref: Bitwise Functions-Footnote-1610622
Ref: Bitwise Functions-Footnote-2610795
Node: Type Functions610986
-Node: I18N Functions613849
-Node: User-defined615500
-Node: Definition Syntax616312
-Ref: Definition Syntax-Footnote-1622006
-Node: Function Example622077
-Ref: Function Example-Footnote-1624999
-Node: Function Calling625021
-Node: Calling A Function625609
-Node: Variable Scope626567
-Node: Pass By Value/Reference629561
-Node: Function Caveats632205
-Ref: Function Caveats-Footnote-1634252
-Node: Return Statement634372
-Node: Dynamic Typing637351
-Node: Indirect Calls638281
-Ref: Indirect Calls-Footnote-1648533
-Node: Functions Summary648661
-Node: Library Functions651366
-Ref: Library Functions-Footnote-1654973
-Ref: Library Functions-Footnote-2655116
-Node: Library Names655287
-Ref: Library Names-Footnote-1658954
-Ref: Library Names-Footnote-2659177
-Node: General Functions659263
-Node: Strtonum Function660445
-Node: Assert Function663467
-Node: Round Function666793
-Node: Cliff Random Function668333
-Node: Ordinal Functions669349
-Ref: Ordinal Functions-Footnote-1672412
-Ref: Ordinal Functions-Footnote-2672664
-Node: Join Function672874
-Ref: Join Function-Footnote-1674644
-Node: Getlocaltime Function674844
-Node: Readfile Function678586
-Node: Shell Quoting680563
-Node: Isnumeric Function681991
-Node: Data File Management683379
-Node: Filetrans Function684011
-Node: Rewind Function688107
-Node: File Checking690016
-Ref: File Checking-Footnote-1691350
-Node: Empty Files691551
-Node: Ignoring Assigns693530
-Node: Getopt Function695080
-Ref: Getopt Function-Footnote-1710303
-Node: Passwd Functions710503
-Ref: Passwd Functions-Footnote-1719342
-Node: Group Functions719430
-Ref: Group Functions-Footnote-1727328
-Node: Walking Arrays727535
-Node: Library Functions Summary730543
-Node: Library Exercises731949
-Node: Sample Programs732414
-Node: Running Examples733184
-Node: Clones733912
-Node: Cut Program735136
-Node: Egrep Program745276
-Node: Id Program754277
-Node: Split Program764224
-Ref: Split Program-Footnote-1774117
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-Node: Uniq Program777080
-Node: Wc Program784668
-Node: Bytes vs. Characters785055
-Node: Using extensions786603
-Node: wc program787357
-Node: Miscellaneous Programs792222
-Node: Dupword Program793435
-Node: Alarm Program795465
-Node: Translate Program800320
-Ref: Translate Program-Footnote-1804885
-Node: Labels Program805155
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-Node: Word Sorting808590
-Node: History Sorting812662
-Node: Extract Program814887
-Node: Simple Sed822941
-Node: Igawk Program826015
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-Ref: Igawk Program-Footnote-2840548
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-Node: Signature Program843847
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-Node: Array Sorting854182
-Node: Controlling Array Traversal854882
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-Node: Array Sorting Functions863368
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-Node: Two-way I/O868938
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-Node: TCP/IP Networking876933
-Node: Profiling880051
-Node: Extension Philosophy889360
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-Node: Translator i18n906455
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-Node: Gawk I18N917293
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-Node: List of Debugger Commands934579
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-Node: Miscellaneous Debugger Commands952217
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-Node: Limitations958175
-Node: Debugging Summary960729
-Node: Namespaces962008
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-Node: Namespace Example970761
-Node: Namespace And Features973323
-Node: Namespace Summary974758
-Node: Arbitrary Precision Arithmetic976235
-Node: Computer Arithmetic977722
-Ref: table-numeric-ranges981488
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-Ref: table-ieee-formats986012
-Ref: Math Definitions-Footnote-1986615
-Node: MPFR features986720
-Node: FP Math Caution988438
-Ref: FP Math Caution-Footnote-1989510
-Node: Inexactness of computations989879
-Node: Inexact representation990839
-Node: Comparing FP Values992199
-Node: Errors accumulate993440
-Node: Getting Accuracy994873
-Node: Try To Round997583
-Node: Setting precision998482
-Ref: table-predefined-precision-strings999179
-Node: Setting the rounding mode1001009
-Ref: table-gawk-rounding-modes1001383
-Ref: Setting the rounding mode-Footnote-11005314
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-Ref: Arbitrary Precision Integers-Footnote-11008668
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-Node: Floating point summary1014614
-Node: Dynamic Extensions1016804
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-Node: Plugin License1019623
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-Node: Extension API Functions Introduction1027291
-Ref: table-api-std-headers1029127
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-Node: Output Wrappers1072340
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-Node: Symbol table by cookie1087755
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-Node: Compiling from Git1247129
-Node: Building the Documentation1247684
-Node: Non-Unix Installation1249068
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-Node: PC Binary Installation1250366
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-Node: PC Using1251918
-Node: Cygwin1255471
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-Node: Bug address1271659
-Node: Usenet1275047
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-Node: Asking for help1278977
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-Node: Basic Data Typing1329439
-Node: Glossary1332767
-Node: Copying1364652
-Node: GNU Free Documentation License1402195
-Node: Index1427315
+Node: I18N Functions614505
+Node: User-defined616156
+Node: Definition Syntax616968
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+Node: Strtonum Function661101
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+Node: Extension Philosophy890016
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+Node: SVR41186584
+Node: POSIX1188018
+Node: BTL1189399
+Node: POSIX/GNU1190128
+Node: Feature History1195906
+Node: Common Extensions1213081
+Node: Ranges and Locales1214364
+Ref: Ranges and Locales-Footnote-11218980
+Ref: Ranges and Locales-Footnote-21219007
+Ref: Ranges and Locales-Footnote-31219242
+Node: Contributors1219465
+Node: History summary1225462
+Node: Installation1226842
+Node: Gawk Distribution1227786
+Node: Getting1228270
+Node: Extracting1229233
+Node: Distribution contents1230871
+Node: Unix Installation1238013
+Node: Quick Installation1238817
+Node: Compiling with MPFR1241293
+Node: Shell Startup Files1241985
+Node: Additional Configuration Options1243074
+Node: Configuration Philosophy1245389
+Node: Compiling from Git1247785
+Node: Building the Documentation1248340
+Node: Non-Unix Installation1249724
+Node: PC Installation1250184
+Node: PC Binary Installation1251022
+Node: PC Compiling1251457
+Node: PC Using1252574
+Node: Cygwin1256127
+Node: MSYS1257351
+Node: VMS Installation1257953
+Node: VMS Compilation1258672
+Ref: VMS Compilation-Footnote-11259901
+Node: VMS Dynamic Extensions1259959
+Node: VMS Installation Details1261644
+Node: VMS Running1263906
+Node: VMS GNV1268185
+Node: Bugs1268899
+Node: Bug definition1269811
+Node: Bug address1272315
+Node: Usenet1275703
+Node: Performance bugs1276712
+Node: Asking for help1279633
+Node: Maintainers1281595
+Node: Other Versions1282789
+Node: Installation summary1290641
+Node: Notes1292005
+Node: Compatibility Mode1292799
+Node: Additions1293581
+Node: Accessing The Source1294506
+Node: Adding Code1295943
+Node: New Ports1302162
+Node: Derived Files1306537
+Ref: Derived Files-Footnote-11312197
+Ref: Derived Files-Footnote-21312232
+Ref: Derived Files-Footnote-31312830
+Node: Future Extensions1312944
+Node: Implementation Limitations1313602
+Node: Extension Design1314812
+Node: Old Extension Problems1315956
+Ref: Old Extension Problems-Footnote-11317474
+Node: Extension New Mechanism Goals1317531
+Ref: Extension New Mechanism Goals-Footnote-11320895
+Node: Extension Other Design Decisions1321084
+Node: Extension Future Growth1323197
+Node: Notes summary1323803
+Node: Basic Concepts1324961
+Node: Basic High Level1325642
+Ref: figure-general-flow1325924
+Ref: figure-process-flow1326609
+Ref: Basic High Level-Footnote-11329910
+Node: Basic Data Typing1330095
+Node: Glossary1333423
+Node: Copying1365308
+Node: GNU Free Documentation License1402851
+Node: Index1427971
End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 4e1b2cb..c709944 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -21021,6 +21021,29 @@ function causes it to become a scalar variable
(unassigned).
However, @code{isarray()} and @code{typeof()} are different; they do
not change their arguments from untyped to unassigned.
+@cindex dark corner @subentry array elements created by reference
+By ``variable'' we mean one denoted by a simple identifier. Array elements
+that come into existence simply by referencing them
+are different, they are automatically forced to be scalars. Consider:
+
+@example
+$ @kbd{gawk 'BEGIN @{ print typeof(x) @}'}
+@print{} untyped
+$ @kbd{gawk 'BEGIN @{ print typeof(x["foo"]) @}'}
+@print{} unassigned
+@end example
+
+@noindent
+@code{x[0]} comes into existence before it is passed to @code{typeof()};
+@code{typeof()} cannot tell that it didn't exist prior to being called.
+@value{DARKCORNER}
+
+@c FIXME: For 5.2, this will change, update this bit of doc.
+This may change in a future release, whereby @command{gawk}
+would allow such an unassigned array element to be used for
+a multidimensional array, and not remain a scalar forever
+(or until deleted).
+
@node I18N Functions
@subsection String-Translation Functions
@cindex @command{gawk} @subentry string-translation functions
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index a9693ce..d874549 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -19933,6 +19933,29 @@ function causes it to become a scalar variable
(unassigned).
However, @code{isarray()} and @code{typeof()} are different; they do
not change their arguments from untyped to unassigned.
+@cindex dark corner @subentry array elements created by reference
+By ``variable'' we mean one denoted by a simple identifier. Array elements
+that come into existence simply by referencing them
+are different, they are automatically forced to be scalars. Consider:
+
+@example
+$ @kbd{gawk 'BEGIN @{ print typeof(x) @}'}
+@print{} untyped
+$ @kbd{gawk 'BEGIN @{ print typeof(x["foo"]) @}'}
+@print{} unassigned
+@end example
+
+@noindent
+@code{x[0]} comes into existence before it is passed to @code{typeof()};
+@code{typeof()} cannot tell that it didn't exist prior to being called.
+@value{DARKCORNER}
+
+@c FIXME: For 5.2, this will change, update this bit of doc.
+This may change in a future release, whereby @command{gawk}
+would allow such an unassigned array element to be used for
+a multidimensional array, and not remain a scalar forever
+(or until deleted).
+
@node I18N Functions
@subsection String-Translation Functions
@cindex @command{gawk} @subentry string-translation functions
-----------------------------------------------------------------------
Summary of changes:
doc/ChangeLog | 5 +
doc/gawk.info | 683 +++++++++++++++++++++++++++++---------------------------
doc/gawk.texi | 23 ++
doc/gawktexi.in | 23 ++
4 files changed, 402 insertions(+), 332 deletions(-)
hooks/post-receive
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