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Diffstat (limited to 'doc/gawk.info')
| -rw-r--r-- | doc/gawk.info | 602 |
1 files changed, 330 insertions, 272 deletions
diff --git a/doc/gawk.info b/doc/gawk.info index 1a28ab52..08fbc297 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -9602,6 +9602,12 @@ with a pound sign (`#'). create or remove fields from the current record. *Note Changing Fields::. +`FUNCTAB #' + An array whose indices are the names of all the user-defined or + extension functions in the program. *NOTE*: The array values + cannot currently be used. Also, you may not use the `delete' + statement with the `FUNCTAB' array. + `NR' The number of input records `awk' has processed since the beginning of the program's execution (*note Records::). `NR' is @@ -9624,6 +9630,32 @@ with a pound sign (`#'). effect, or `"FPAT"' if field matching with `FPAT' is in effect. + `PROCINFO["identifiers"]' + A subarray, indexed by the names of all identifiers used in + the text of the AWK program. For each identifier, the value + of the element is one of the following: + + `"array"' + The identifier is an array. + + `"extension"' + The identifier is an extension function loaded via + `@load'. + + `"scalar"' + The identifier is a scalar. + + `"untyped"' + The identifier is untyped (could be used as a scalar or + array, `gawk' doesn't know yet). + + `"user"' + The identifier is a user-defined function. + + The values indicate what `gawk' knows about the identifiers + after it has finished parsing the program; they are _not_ + updated while the program runs. + `PROCINFO["gid"]' The value of the `getgid()' system call. @@ -9705,6 +9737,23 @@ with a pound sign (`#'). implementations, or if `gawk' is in compatibility mode (*note Options::), it is not special. +`SYMTAB #' + An array whose indices are the names of all currently defined + global variables and arrays in the program. The array may be used + for indirect access to read or write the value of a variable: + + foo = 5 + SYMTAB["foo"] = 4 + print foo # prints 4 + + The `isarray()' function (*note Type Functions::) may be used to + test if an element in `SYMTAB' is an array. Also, you may not use + the `delete' statement with the `SYMTAB' array. + + NOTE: In order to avoid severe time-travel paradoxes(2), + neither `FUNCTAB' nor `SYMTAB' are available as elements + within the `SYMTAB' array. + Advanced Notes: Changing `NR' and `FNR' --------------------------------------- @@ -9734,6 +9783,8 @@ file by resetting `NR' to zero when `FILENAME' changed. to `"-"', even if there were data files to be processed. This behavior was incorrect and should not be relied upon in your programs. + (2) Not to mention difficult implementation issues. + File: gawk.info, Node: ARGC and ARGV, Prev: Auto-set, Up: Built-in Variables @@ -25971,7 +26022,7 @@ Index (line 67) * advanced features, data files as single record: Records. (line 180) * advanced features, fixed-width data: Constant Size. (line 9) -* advanced features, FNR/NR variables: Auto-set. (line 225) +* advanced features, FNR/NR variables: Auto-set. (line 274) * advanced features, gawk: Advanced Features. (line 6) * advanced features, gawk, network programming: TCP/IP Networking. (line 6) @@ -26476,7 +26527,7 @@ Index (line 47) * dark corner, FILENAME variable <1>: Auto-set. (line 93) * dark corner, FILENAME variable: Getline Notes. (line 19) -* dark corner, FNR/NR variables: Auto-set. (line 225) +* dark corner, FNR/NR variables: Auto-set. (line 274) * dark corner, format-control characters: Control Letters. (line 18) * dark corner, FS as null string: Single Character Fields. (line 20) @@ -26646,6 +26697,7 @@ Index * differences in awk and gawk, FIELDWIDTHS variable: User-modified. (line 35) * differences in awk and gawk, FPAT variable: User-modified. (line 45) +* differences in awk and gawk, FUNCTAB variable: Auto-set. (line 119) * differences in awk and gawk, function arguments (gawk): Calling Built-in. (line 16) * differences in awk and gawk, getline command: Getline. (line 19) @@ -26670,14 +26722,14 @@ Index (line 6) * differences in awk and gawk, print/printf statements: Format Modifiers. (line 13) -* differences in awk and gawk, PROCINFO array: Auto-set. (line 124) +* differences in awk and gawk, PROCINFO array: Auto-set. (line 130) * differences in awk and gawk, record separators: Records. (line 117) * differences in awk and gawk, regexp constants: Using Constant Regexps. (line 43) * differences in awk and gawk, regular expressions: Case-sensitivity. (line 26) * differences in awk and gawk, RS/RT variables: Records. (line 172) -* differences in awk and gawk, RT variable: Auto-set. (line 214) +* differences in awk and gawk, RT variable: Auto-set. (line 246) * differences in awk and gawk, single-character fields: Single Character Fields. (line 6) * differences in awk and gawk, split() function: String Functions. @@ -26686,6 +26738,7 @@ Index * differences in awk and gawk, strings, storing: Records. (line 192) * differences in awk and gawk, strtonum() function (gawk): String Functions. (line 404) +* differences in awk and gawk, SYMTAB variable: Auto-set. (line 254) * differences in awk and gawk, TEXTDOMAIN variable: User-modified. (line 162) * differences in awk and gawk, trunc-mod operation: Arithmetic Ops. @@ -26956,7 +27009,7 @@ Index * floating-point, numbers: General Arithmetic. (line 6) * FNR variable <1>: Auto-set. (line 103) * FNR variable: Records. (line 6) -* FNR variable, changing: Auto-set. (line 225) +* FNR variable, changing: Auto-set. (line 274) * for statement: For Statement. (line 6) * for statement, in arrays: Scanning an Array. (line 20) * format specifiers, mixing regular with positional specifiers: Printf Ordering. @@ -26999,6 +27052,7 @@ Index * FSF (Free Software Foundation) <1>: Glossary. (line 301) * FSF (Free Software Foundation) <2>: Getting. (line 10) * FSF (Free Software Foundation): Manual History. (line 6) +* FUNCTAB array: Auto-set. (line 119) * function calls: Function Calls. (line 6) * function calls, indirect: Indirect Calls. (line 6) * function pointers: Indirect Calls. (line 6) @@ -27086,6 +27140,7 @@ Index * gawk, FPAT variable in <1>: User-modified. (line 45) * gawk, FPAT variable in: Splitting By Content. (line 26) +* gawk, FUNCTAB array in: Auto-set. (line 119) * gawk, function arguments and: Calling Built-in. (line 16) * gawk, functions, adding: Dynamic Extensions. (line 9) * gawk, hexadecimal numbers and: Nondecimal-numbers. (line 42) @@ -27117,7 +27172,7 @@ Index * gawk, OS/2 version of: PC Using. (line 11) * gawk, PROCINFO array in <1>: Two-way I/O. (line 116) * gawk, PROCINFO array in <2>: Time Functions. (line 46) -* gawk, PROCINFO array in: Auto-set. (line 124) +* gawk, PROCINFO array in: Auto-set. (line 130) * gawk, regexp constants and: Using Constant Regexps. (line 28) * gawk, regular expressions, case sensitivity: Case-sensitivity. @@ -27125,7 +27180,7 @@ Index * gawk, regular expressions, operators: GNU Regexp Operators. (line 6) * gawk, regular expressions, precedence: Regexp Operators. (line 161) -* gawk, RT variable in <1>: Auto-set. (line 214) +* gawk, RT variable in <1>: Auto-set. (line 246) * gawk, RT variable in <2>: Getline/Variable/File. (line 10) * gawk, RT variable in <3>: Multiple Line. (line 129) @@ -27134,6 +27189,7 @@ Index * gawk, source code, obtaining: Getting. (line 6) * gawk, splitting fields and: Constant Size. (line 87) * gawk, string-translation functions: I18N Functions. (line 6) +* gawk, SYMTAB array in: Auto-set. (line 254) * gawk, TEXTDOMAIN variable in: User-modified. (line 162) * gawk, timestamps: Time Functions. (line 6) * gawk, uses for: Preface. (line 36) @@ -27536,9 +27592,9 @@ Index (line 49) * noassign.awk program: Ignoring Assigns. (line 15) * not Boolean-logic operator: Boolean Ops. (line 6) -* NR variable <1>: Auto-set. (line 119) +* NR variable <1>: Auto-set. (line 125) * NR variable: Records. (line 6) -* NR variable, changing: Auto-set. (line 225) +* NR variable, changing: Auto-set. (line 274) * null strings <1>: Basic Data Typing. (line 26) * null strings <2>: Truth Values. (line 6) * null strings <3>: Regexp Field Splitting. @@ -27821,7 +27877,7 @@ Index * PROCINFO array <3>: Passwd Functions. (line 6) * PROCINFO array <4>: Two-way I/O. (line 116) * PROCINFO array <5>: Time Functions. (line 46) -* PROCINFO array <6>: Auto-set. (line 124) +* PROCINFO array <6>: Auto-set. (line 130) * PROCINFO array: Obsolete. (line 11) * profiling awk programs: Profiling. (line 6) * profiling awk programs, dynamically: Profiling. (line 171) @@ -27963,7 +28019,7 @@ Index * right angle bracket (>), >> operator (I/O): Redirection. (line 50) * right shift, bitwise: Bitwise Functions. (line 32) * Ritchie, Dennis: Basic Data Typing. (line 55) -* RLENGTH variable: Auto-set. (line 201) +* RLENGTH variable: Auto-set. (line 233) * RLENGTH variable, match() function and: String Functions. (line 223) * Robbins, Arnold <1>: Future Extensions. (line 6) * Robbins, Arnold <2>: Bugs. (line 32) @@ -27990,9 +28046,9 @@ Index * RS variable: Records. (line 20) * RS variable, multiline records and: Multiple Line. (line 17) * rshift() function (gawk): Bitwise Functions. (line 52) -* RSTART variable: Auto-set. (line 207) +* RSTART variable: Auto-set. (line 239) * RSTART variable, match() function and: String Functions. (line 223) -* RT variable <1>: Auto-set. (line 214) +* RT variable <1>: Auto-set. (line 246) * RT variable <2>: Getline/Variable/File. (line 10) * RT variable <3>: Multiple Line. (line 129) @@ -28184,6 +28240,7 @@ Index * substr() function: String Functions. (line 481) * Sumner, Andrew: Other Versions. (line 55) * switch statement: Switch Statement. (line 6) +* SYMTAB array: Auto-set. (line 254) * syntactic ambiguity: /= operator vs. /=.../ regexp constant: Assignment Ops. (line 148) * system() function: I/O Functions. (line 63) @@ -28617,264 +28674,265 @@ Node: Built-in Variables393879 Node: User-modified394974 Ref: User-modified-Footnote-1403329 Node: Auto-set403391 -Ref: Auto-set-Footnote-1413299 -Node: ARGC and ARGV413504 -Node: Arrays417355 -Node: Array Basics418860 -Node: Array Intro419686 -Node: Reference to Elements424004 -Node: Assigning Elements426274 -Node: Array Example426765 -Node: Scanning an Array428497 -Node: Controlling Scanning430811 -Ref: Controlling Scanning-Footnote-1435744 -Node: Delete436060 -Ref: Delete-Footnote-1438825 -Node: Numeric Array Subscripts438882 -Node: Uninitialized Subscripts441065 -Node: Multi-dimensional442693 -Node: Multi-scanning445787 -Node: Arrays of Arrays447378 -Node: Functions452023 -Node: Built-in452845 -Node: Calling Built-in453923 -Node: Numeric Functions455911 -Ref: Numeric Functions-Footnote-1459743 -Ref: Numeric Functions-Footnote-2460100 -Ref: Numeric Functions-Footnote-3460148 -Node: String Functions460417 -Ref: String Functions-Footnote-1483914 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Precision Arithmetic-Footnote-1807610 +Node: General Arithmetic807758 +Node: Floating Point Issues809478 +Node: String Conversion Precision810359 +Ref: String Conversion Precision-Footnote-1812065 +Node: Unexpected Results812174 +Node: POSIX Floating Point Problems814327 +Ref: POSIX Floating Point Problems-Footnote-1818152 +Node: Integer Programming818190 +Node: Floating-point Programming819943 +Ref: Floating-point Programming-Footnote-1826252 +Node: Floating-point Representation826516 +Node: Floating-point Context827681 +Ref: table-ieee-formats828523 +Node: Rounding Mode829907 +Ref: table-rounding-modes830386 +Ref: Rounding Mode-Footnote-1833390 +Node: Gawk and MPFR833571 +Node: Arbitrary Precision Floats834813 +Ref: Arbitrary Precision Floats-Footnote-1837242 +Node: Setting Precision837553 +Node: Setting Rounding Mode840286 +Ref: table-gawk-rounding-modes840690 +Node: Floating-point Constants841870 +Node: Changing Precision843294 +Ref: Changing Precision-Footnote-1844694 +Node: Exact Arithmetic844868 +Node: Arbitrary Precision Integers847976 +Ref: Arbitrary Precision Integers-Footnote-1850976 +Node: Dynamic Extensions851123 +Node: Plugin License852041 +Node: Sample Library852655 +Node: Internal File Description853339 +Node: Internal File Ops857052 +Ref: Internal File Ops-Footnote-1861615 +Node: Using Internal File Ops861755 +Node: Language History864131 +Node: V7/SVR3.1865653 +Node: SVR4867974 +Node: POSIX869416 +Node: BTL870424 +Node: POSIX/GNU871158 +Node: Common Extensions876693 +Node: Ranges and Locales877800 +Ref: Ranges and Locales-Footnote-1882418 +Ref: Ranges and Locales-Footnote-2882445 +Ref: Ranges and Locales-Footnote-3882705 +Node: Contributors882926 +Node: Installation887222 +Node: Gawk Distribution888116 +Node: Getting888600 +Node: Extracting889426 +Node: Distribution contents891118 +Node: Unix Installation896340 +Node: Quick Installation896957 +Node: Additional Configuration Options898919 +Node: Configuration Philosophy900396 +Node: Non-Unix Installation902738 +Node: PC Installation903196 +Node: PC Binary Installation904495 +Node: PC Compiling906343 +Node: PC Testing909287 +Node: PC Using910463 +Node: Cygwin914648 +Node: MSYS915648 +Node: VMS Installation916162 +Node: VMS Compilation916765 +Ref: VMS Compilation-Footnote-1917772 +Node: VMS Installation Details917830 +Node: VMS Running919465 +Node: VMS Old Gawk921072 +Node: Bugs921546 +Node: Other Versions925398 +Node: Notes930713 +Node: Compatibility Mode931300 +Node: Additions932083 +Node: Accessing The Source933010 +Node: Adding Code934436 +Node: New Ports940478 +Node: Derived Files944613 +Ref: Derived Files-Footnote-1949918 +Ref: Derived Files-Footnote-2949952 +Ref: Derived Files-Footnote-3950552 +Node: Future Extensions950650 +Node: Basic Concepts952137 +Node: Basic High Level952818 +Ref: Basic High Level-Footnote-1956853 +Node: Basic Data Typing957038 +Node: Glossary960393 +Node: Copying985568 +Node: GNU Free Documentation License1023125 +Node: Index1048262 End Tag Table |