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Programming languages parsing of command-line arguments
programming portal Command-line argument parsing refers to methods used in a programming language to parse command-line arguments. A command-line option or simply
Command-line_argument_parsing
Means of entering commands to software
a directory, to illustrate some conventions: Command-line argument parsing is used to parse the arguments of a program, and such functionality is offered
Command-line_interface
Shell for Windows NT and other operating systems
explanation needed] The set command can perform expression evaluation. An expansion of the for command supports parsing files and arbitrary sets in addition
Command_Prompt_(Windows)
Bottom-up parser that interprets an operator-precedence grammar
JavaScript parser in JSLint on Pratt parsing. Comparison between Python implementations of precedence climbing and Pratt parsing: "Pratt Parsing and Precedence
Operator-precedence_parser
C library function for parsing command-line options
the name of a Unix program for parsing command line arguments in shell scripts. A long-standing issue with command line programs was how to specify options;
Getopt
letter instead of under an absolute path. When a command line does not match a command or arguments directly, spell checking can automatically correct
Comparison_of_command_shells
Standard UNIX utility for parsing arguments sent from the command-line
getopts is a built-in Unix shell command for parsing command-line arguments. It is designed to process command line arguments that follow the POSIX Utility
Getopts
Programming language designed by Carl Sassenrath
parsing, taking into account characters and delimiters. Block parsing is higher level, handling the scanning at the level of Rebol values. The parse dialect
Rebol
Usage of reflective programming in C++
std::println("p = {}", p); } Another use case is command-line argument parsing; annotations may be used for parser derivation, similar to that of the clap library
Reflection_(C++)
Symbol "#!", used in computing
the line #!/bin/sh, then the program loader is instructed to run the program /bin/sh, passing path/to/script as the first argument. The shebang line is
Shebang_(Unix)
GNU replacement for the Bourne shell
signals "line continuation". Bash always finishes parsing and executing one full commandline before moving on to and beginning with the parsing of the next
Bash_(Unix_shell)
Feature of Unix shells and some programming languages
computing, command substitution is a facility that allows a command to be run and its output to be pasted back on the command line as arguments to another
Command_substitution
Script file for Microsoft computer operating systems
the GetCommandLine API function. As a result, each Windows application can implement its own parser to split the entire command line into arguments. Many
Batch_file
General purpose C++ library
7-Zip file archive software Configuration file manipulation Command-line argument parsing Tools and server application framework APIs for interacting
POCO_C++_Libraries
Computer text file character representing blank space
multiple arguments. Typically, a parser allows for escaping the normal argument parsing by enclosing the text in quotes. If, for example, a user wanted to
Whitespace_character
working directory or with no arguments displays the current value. Both names, CD and CHDIR, refer to the same command and are abbreviations of the phrase
List_of_DOS_commands
Command language adopted by several operating systems (OSs)
supplied commands and user written commands. The command line must start with a verb and is then followed by up to 8 parameters (arguments) and/or qualifiers
DIGITAL_Command_Language
Computer security exploit using injected code
Markup Language (XML) parsers, operating system commands, Simple Mail Transfer Protocol (SMTP) headers, and other program arguments. Injection flaws can
Code_injection
Typographical symbol (@)
enabling dynamic runtime substitution of part or all of a command line, a command, or a command argument. In Pascal, @ is the "address of" operator (it tells
At_sign
Utility for transforming text
stops. Commands accept an optional address argument in terms as a line number or regular expression. The address determines when the command applies
Sed
addition to using Racket's library for command-line argument parsing: #!/usr/bin/env racket #lang racket (command-line #:args (base-dir ext re) (for ([p (in-directory)]
Racket_features
High-level programming language
special substitution occurs before the parsing of any commands or arguments. If the final character on a line (i.e., immediately before a newline) is
Tcl_(programming_language)
C function to format and output text
command that formats text and writes it to standard output. The function accepts a format C-string argument and a variable number of value arguments that
Printf
Software tool
cucumber provides the --help option that provides a summary of arguments the command accepts. $ cucumber --help -r, --require LIBRARY|DIR Require files
Cucumber_(software)
Unix shell
`command` means take the output of command, parse it into words and paste them back into the command line. Normally, when the C shell starts a command
C_shell
Software libraries
of Responsibility pattern implementation 1.2 2008-06-01 CLI Command Line arguments parser 1.11.0 2025-11-08 Codec General encoding/decoding algorithms
Apache_Commons
Variable that represents an argument to a function
object, though not changing which object the variable refers to. Command-line argument Evaluation strategy Free variables and bound variables Function
Parameter (computer programming)
Parameter_(computer_programming)
User-definable variable associated with each running process in many operating systems
%SWITCHAR% This variable defines the SwitChar to be used for argument parsing by some DR-DOS commands. If defined, it overrides the system's current SwitChar
Environment_variable
(std::ffi::OsString), which can be invalid UTF-8. ^b In Visual Basic, command-line arguments are not separated. Separating them requires a split function Split(string)
Comparison of programming languages (basic instructions)
Comparison_of_programming_languages_(basic_instructions)
Text in computer source code that is generally ignored by a compiler/interpreter
generator parses information from a codebase to generate API documentation. Many support reading information from comments, often parsing metadata, to
Comment (computer programming)
Comment_(computer_programming)
This is a list of the shell commands of the most recent version of the Portable Operating System Interface (POSIX) – IEEE Std 1003.1-2024 which is part
List_of_POSIX_commands
Part of a URL that assigns values to specified parameters
argument1+argument2+argument3... The query string is composed of a series of arguments by parsing the text into words at the spaces. The series is separated by the
Query_string
X Window System parameters
XrmQPutStringResource, XrmPutLineResource, XrmEnumerateDatabase) In particular, the function XrmParseCommand allow parsing the command line arguments, reading resources
X_resources
Features of a computer terminal beyond displaying text
repeatedly parsing the database content to read the fields of a record. The use of multiple files was to avoid the similar overhead of parsing the database
Terminal_capabilities
Software build automation tool
In software development, Make is a command-line interface software tool that performs actions ordered by configured dependencies as defined in a configuration
Make_(software)
Control flow statement that branches according to a Boolean expression
function (in Tcl known as command or proc). For example if {$x > 10} { puts "Foo!" } invokes a function named if passing 2 arguments: The first one being the
Conditional (computer programming)
Conditional_(computer_programming)
Collection of open-source Python software tools for computational biology
included command-line wrappers for tools such as BLAST, Clustal, EMBOSS, and SAMtools. This option allowed users to run external tool commands from within
Biopython
Coding language, extension for Erlang
(init:get_argument flag))) (lists:merge data))) (defun get-pages () "With no argument, assume 'url parameter was passed via command line." (let ((urls (parse-args
LFE_(programming_language)
Loss-of-control incident at OpenAI
chained two zero-days in the dataset infrastructure. A flaw in HDF5 dataset parsing gave an arbitrary-file-read primitive, so that a specially crafted dataset
OpenAI–HuggingFace_incident
Command-line interpreter for operating systems
case ~ in ~ esac selection mechanism, primarily intended to assist argument parsing. sh provided support for environment variables using keyword parameters
Bourne_shell
alphanumeric characters can prefix a CMS command or an EXEC control statement. The interpreter parses commands into blank-delimited tokens of up to eight
CMS_EXEC
Computer programming environment
Lisp with the SLIME development environment. Common examples include command-line shells and similar environments for programming languages, and the technique
Read–eval–print_loop
Command-line program documentation generator for Haskell
Haddock is a free, portable command-line program documentation generator for Haskell. It is influenced by IDoc, HDoc, and Doxygen. It produces hyperlinked
Haddock_(software)
Cross-platform shell based on .NET technology
and configuration management. As is typical for a shell, it provides a command-line interpreter for interactive use and a script interpreter for automation
PowerShell
British computer scientist (1935–2021)
"Parsing in Free Word Order Languages" (with Lauri Karttunen), in Dowty, David R., Lauri Karttunen, and Arnold M. Zwicky, Natural Language Parsing, Cambridge
Martin_Kay
Stack-based programming language
a new line. The parsing word ." (dot-quote) reads a double-quote delimited string and appends code to the current definition so that the parsed string
Forth_(programming_language)
Collection of Unix tools in single executable file
Toybox is a free and open-source software implementation of over 200 Unix command line utilities. The Toybox project was started in 2006, and became a 0BSD
Toybox
Function in a programming language, which evaluates a string
eval command is present in all Unix shells, including the original "sh" (Bourne shell). It concatenates all the arguments with spaces, then re-parses and
Eval
Method used for display options on video text terminals
to the keyboard buffer the string "DIR" and ENTER, which in the DOS command line would display the contents of the current directory. (MS-DOS ANSI.SYS
ANSI_escape_code
Scripting language created in 1994
non-web uses are rare. PHP code can also be directly executed from the command line. The standard PHP interpreter, powered by the Zend Engine, is free software
PHP
Form of text that defines C code
main function. Arguments included in the command line to start a program are passed to a program as two values – the number of arguments (customarily named
C_syntax
Extension of Rexx programming language with support for object-oriented programming
since the initial parsing and compiling has already been done. The PARSE keyword instruction makes it possible to quickly and flexibly parse a string and assign
Object_REXX
Set of rules defining correctly structured programs
more than one argument: class ParseError < Exception def initialize(input, line, pos) super "Could not parse '#{input}' at line #{line}, position #{pos}"
Ruby_syntax
Data-interchange format
with JavaScript, but it is a language-independent data format. Code for parsing and generating JSON data is readily available in many programming languages
JSON
Features in Haskell programming language
as an argument, and returns another integer. The type of a definition is inferred automatically if no type annotation is given. The second line relies
Haskell_features
produced by parsing the source code for special comments (C# compilers from .NET Framework and Mono support this using the "/doc" command-line argument). The
NDoc
Embedded documentation generator for the Ruby programming language
creating Ruby ri data files, providing access to API information from the command line. RDoc and ri are currently maintained by Eric Hodel and Ryan Davis. RDoc
RDoc
Standard UNIX utility
The tsort program is a command line utility on Unix and Unix-like platforms, that performs a topological sort on its input. It is part of the POSIX.1 standard
Tsort
American video game company
character is visible on the screen, a more competent text parser that understands advanced commands from the player, and music playing in the background through
Sierra_Entertainment
File format
command line via their preferences domain, and this utility can be used to edit arbitrary plist files. This utility superseded three older commands (dread
Property_list
Machine instruction that indicates to a computer to do nothing
language has the \relax command. It does nothing by itself, but may be used to prevent the immediately preceding command from parsing any subsequent tokens
NOP_(code)
Programmable text editor
since there is no syntax and no parsing. TECO ignores case and whitespace (except tab, which is an insertion command). A satirical essay on computer programming
TECO_(text_editor)
Operating system
complete command macro language which can be used to create menu systems, automate tasks etc. VOS command macros accept arguments on the command-line or via
Stratus_VOS
Doctrine of hierarchical accountability
In the practice of international law, command responsibility (also superior responsibility) is the legal doctrine of hierarchical accountability for war
Command_responsibility
Object-oriented programming language
clear distinction between expressions and instructions. This is in line with the Command-Query Separation principle of the Eiffel method. Much of the documentation
Eiffel_(programming_language)
Microsoft computer operating system
from the hard disk to a command line only was no longer permitted, AUTOEXEC.BAT and CONFIG.SYS files were no longer loaded or parsed before loading the Windows
MS-DOS
Programming language
separates a command from its argument, and a space, or newline, separates each argument from the next MUMPS token. Commands which take no arguments (e.g.,
MUMPS
Programming language
functions in these categories (though the list changes over time): Command-line argument processing Array (dynamic) declaration and manipulation Bit manipulation
High_Level_Assembly
Connected input and output streams for computer programs
programs (which display file names contained in a directory) may take command-line arguments, but perform their operations without any stream data input. Unless
Standard_streams
continue the prior command. The C compiler concatenates adjacent string literals even if on separate lines, but this is not line continuation syntax
Comparison of programming languages (syntax)
Comparison_of_programming_languages_(syntax)
Programming language dialect; international standard
the program line-by-line; checking for branches into a block from other code in the program would normally require whole-program parsing like a compiler
Full_BASIC
0x80) where the command line arguments were stored, such that a program needed to parse this area for command line arguments before invoking DOS functions
File_Control_Block
Free and open-source assembler
descriptor for stdout) -> EBX (1st argument to syscall) movl $msg, %ecx # 32-bit address of msg string -> ECX (2nd argument) movl $len, %edx # length of msg
GNU_Assembler
Programming language
for that purpose. For example, TUTOR has powerful answer-parsing and answer-judging commands, graphics, and features to simplify handling student records
TUTOR
Programming language used on DEC PDP-series machines
a unique letter. This simplified the parser, which needed to read only the first letter of the command on a line of code, and could then skip forward
FOCAL_(programming_language)
Programming language family
interactive command line, which may be combined with an integrated development environment (IDE). The user types in expressions at the command line, or directs
Lisp_(programming_language)
Database for Microsoft Windows
Microsoft, this offers several advantages over .INI files. Since file parsing is done much more efficiently with a binary format, it may be read from
Windows_Registry
Set of rules defining correctly structured programs
The different import statements are demonstrated here: # imports the argument parsing module import argparse # imports the Pattern class from the regular
Python_syntax_and_semantics
Programming language derived from Perl
provide the capabilities of context-sensitive parsing formalisms (such as the syntactic predicates of parsing expression grammars and ANTLR), as well as
Raku_(programming_language)
Toolkit for building GUI and command-line based operating systems
Managed Operating System (Cosmos) is a toolkit for building GUI and command-line based operating systems, written mostly in the programming language C#
Cosmos_(operating_system)
Interpreted programming language first released in 1987
also with the undecidability of Perl parsing in the general case. Adam Kennedy's PPI project focused on parsing Perl code as a document (retaining its
Perl
Rule for substituting a set input with a set output
manpages. CMS EXEC: for command-line macros and application macros EXEC 2 in Conversational Monitor System (CMS): for command-line macros and application
Macro_(computer_science)
Object–relational mapping solution
BeginTransaction()) { //The line below adds the customer to NHibernate's list of objects to insert to the database //but it doesn't execute SQL insert command at this stage*
NHibernate
Character set
These tokens allow a BASIC command like PRINT to be entered with the single keypress P at the beginning of a line (i.e. in command mode), which generated
ZX_Spectrum_character_set
Text file processor instruction to include the content of one file into another
%include ... (PL/I) /COPY QCPYLESRC,QBC (RPG IV – first argument is the filename, second argument is the copybook) local ... = require("...") (Lua) Modern
Include_directive
Expression language for XML documents
its argument. string(object?) converts any of the four XPath data types into a string according to built-in rules. If the value of the argument is a
XPath
Relational database management system
gadfly" reads in and initializes some rather large data structures used for parsing SQL, and thus may take longer than other module imports. Within the database
Gadfly_(database)
AOL instant messaging protocol
were sent in a format resembling a Unix-style command line: commands with whitespace-separated arguments, quoting and backslash escape sequences. Server-to-client
TOC_protocol
Disk operating system of the AmigaOS
AmigaOS, which includes file systems, file and directory manipulation, the command-line interface, and file redirection. In AmigaOS 1.x, AmigaDOS is based on
AmigaDOS
Object-oriented computer programming language
NET Framework SDK includes a freeware command-line compiler called vbc.exe. Mono also includes a command-line VB.NET compiler. Visual Basic is often
Visual_Basic_(.NET)
BASIC interpreter of the Apple I and original Apple II computers
them through a parser which output a series of tokens. As part of this process, simple syntax errors were detected and listed. If the parsing was successful
Integer_BASIC
Interpreter that enables users to enter and run programs in the BASIC language
File input/output (if any) Editing routines Command line Program editing and storage Execution routines Parsing and interpretation Arithmetic package Memory
BASIC_interpreter
List of programming languages types and the languages that meet its description
Information Typing Architecture (DITA) Lasso PILOT TUTOR Authorware Command-line interface (CLI) languages are also called batch languages or job control
List of programming languages by type
List_of_programming_languages_by_type
British Army officer and statesman (1769–1852)
Vitoria 4 Torres Vedras 3 Køge 2 Assaye 1 Seringapatam <maplink>: Couldn't parse JSON: Syntax error Field Marshal Arthur Wellesley, 1st Duke of Wellington
Arthur Wellesley, 1st Duke of Wellington
Arthur_Wellesley,_1st_Duke_of_Wellington
entire runtime of the program, though in interpreted languages (including command-line interpreters), global variables are generally dynamically allocated when
Glossary_of_computer_science
Text processor used with C and C++ and other programming tools
preprocessor can be made more standards compliant by supplying certain command-line flags. The C# programming language also allows for directives, though
C_preprocessor
Lisp dialect
languages, it can be used for scripting the Unix shell. It can parse command-line arguments and execute external tools. DrRacket (formerly DrScheme) is widely
Racket_(programming_language)
Object-oriented programming language
exception handler's "ex" argument provides access to the state of the suspended operation (stack frame, line-number, receiver and arguments etc.) and is also
Smalltalk
Dialect of Microsoft BASIC programming language
lores graphics commands. The USR() function is also defined differently, serving as a stand-in for the absent CALL command. Its argument is not for passing
Applesoft_BASIC
Type of email
uniformly breaking each line at 78 characters (defined in RFC 5322, which was necessary on older text terminals). It allows in-line inclusion of images,
HTML_email
travel, tourism, insurance
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travel, tourism, insurance