C.2 Index for many concepts

• argument currying: Composition
• arguments to macros: Arguments
• arguments to macros: Macro Arguments
• arguments to macros, special: Pseudo Arguments
• arguments, joining: Shift
• arguments, more than nine: Improved foreach
• arguments, more than nine: Shift
• arguments, more than nine: Arguments
• arguments, quoted macro: Quoting Arguments
• arguments, reversing: Shift
• arithmetic: Arithmetic
• arrays: Define
• avoiding quadratic behavior: Improved foreach
• basic regular expressions: Patsubst
• basic regular expressions: Regexp
• blind macro: Composition
• blind macro: Ifelse
• blind macro: Inhibiting Invocation
• bug reports: Bugs
• builtins, indirect call of: Builtin
• builtins, special tokens: Defn
• call of builtins, indirect: Builtin
• call of macros, indirect: Indir
• case statement: Ifelse
• changing comment delimiters: Changecom
• changing quote delimiters: Changequote
• changing syntax: Changeword
• characters, translating: Translit
• command line: Invoking m4
• command line, file names on the: Command line files
• command line, macro definitions on the: Preprocessor features
• command line, options: Invoking m4
• commands, exit status from shell: Sysval
• commands, running shell: Shell commands
• comment delimiters, changing: Changecom
• comments: Comments
• comments, copied to output: Changecom
• comparing strings: Ifelse
• compatibility: Compatibility
• composing macros: Composition
• concatenating arguments: Shift
• conditional, short-circuiting: Shift
• conditionals: Ifdef
• controlling debugging output: Debug Levels
• copying macros: Composition
• counting loops: Forloop
• currying arguments: Composition
• debugging macros: Debugging
• debugging output, controlling: Debug Levels
• debugging output, saving: Debug Output
• decrement operator: Incr
• deferring expansion: M4wrap
• deferring output: Diversions
• defining new macros: Definitions
• definition stack: Stacks
• definition stack: Pushdef
• definitions, displaying macro: Dumpdef
• definitions, displaying macro: Defn
• deleting macros: Undefine
• deleting whitespace in input: Dnl
• delimiters, changing: Changecom
• delimiters, changing: Changequote
• discarding diverted text: Cleardivert
• discarding input: Divert
• discarding input: Dnl
• discarding input: Ifelse
• displaying macro definitions: Dumpdef
• diversion numbers: Divnum
• diverted text, discarding: Cleardivert
• diverting output to files: Divert
• dumping into frozen file: Using frozen files
• error messages, printing: Errprint
• errors, fatal: Operation modes
• evaluation, of integer expressions: Eval
• examples, understanding: Manual
• executing shell commands: Shell commands
• exit status from shell commands: Sysval
• exiting from m4: M4exit
• expansion of macros: Macro expansion
• expansion, deferring: M4wrap
• expansion, tracing macro: Trace
• expressions, evaluation of integer: Eval
• expressions, regular: Patsubst
• expressions, regular: Regexp
• extracting substrings: Substr
• fast loading of frozen files: Using frozen files
• fatal errors: Operation modes
• FDL, GNU Free Documentation License: GNU Free Documentation License
• file format, frozen file: Frozen file format
• file inclusion: Undivert
• file inclusion: File Inclusion
• file names, on the command line: Command line files
• files, diverting output to: Divert
• files, names of temporary: Mkstemp
• for each loops: Foreach
• for loops: Forloop
• formatted output: Format
• Free Documentation License (FDL), GNU: GNU Free Documentation License
• frozen file format: Frozen file format
• frozen files for fast loading: Using frozen files
• General Public License (GPL), GNU: GNU General Public License
• GNU extensions: Extensions
• GNU extensions: Using frozen files
• GNU extensions: Mkstemp
• GNU extensions: Esyscmd
• GNU extensions: Eval
• GNU extensions: Format
• GNU extensions: Patsubst
• GNU extensions: Regexp
• GNU extensions: Undivert
• GNU extensions: Divert
• GNU extensions: Search Path
• GNU extensions: Debug Output
• GNU extensions: Debug Levels
• GNU extensions: Builtin
• GNU extensions: Indir
• GNU extensions: Arguments
• GNU extensions: Define
• GNU extensions: Inhibiting Invocation
• GNU Free Documentation License: GNU Free Documentation License
• GNU General Public License: GNU General Public License
• GNU M4, history of: History
• GPL, GNU General Public License: GNU General Public License
• history of m4: History
• included files, search path for: Search Path
• inclusion, of files: Undivert
• inclusion, of files: File Inclusion
• increment operator: Incr
• indirect call of builtins: Builtin
• indirect call of macros: Indir
• initialization, frozen state: Using frozen files
• input location: Location
• input location: Preprocessor features
• input tokens: Syntax
• input, discarding: Divert
• input, discarding: Dnl
• input, discarding: Ifelse
• input, saving: M4wrap
• integer arithmetic: Arithmetic
• integer expression evaluation: Eval
• invoking m4: Invoking m4
• invoking macros: Invocation
• iterating over lists: Foreach
• joining arguments: Shift
• length of strings: Len
• lexical structure of words: Changeword
• License, code: Copying This Package
• License, manual: Copying This Manual
• limit, nesting: Limits control
• literal output: Pseudo Arguments
• local variables: Pushdef
• location, input: Location
• location, input: Preprocessor features
• loops: Shift
• loops, counting: Forloop
• loops, list iteration: Foreach
• M4PATH: Search Path
• macro composition: Composition
• macro definitions, on the command line: Preprocessor features
• macro expansion, tracing: Trace
• macro invocation: Invocation
• macro, blind: Composition
• macro, blind: Ifelse
• macro, blind: Inhibiting Invocation
• macros, arguments to: Arguments
• macros, arguments to: Macro Arguments
• macros, copying: Composition
• macros, debugging: Debugging
• macros, displaying definitions: Dumpdef
• macros, displaying definitions: Defn
• macros, expansion of: Macro expansion
• macros, how to define new: Definitions
• macros, how to delete: Undefine
• macros, how to rename: Defn
• macros, indirect call of: Indir
• macros, quoted arguments to: Quoting Arguments
• macros, recursive: Shift
• macros, special arguments to: Pseudo Arguments
• macros, temporary redefinition of: Pushdef
• manipulating quotes: Shift
• messages, printing error: Errprint
• more than nine arguments: Improved foreach
• more than nine arguments: Shift
• more than nine arguments: Arguments
• multibranches: Ifelse
• names: Names
• nesting limit: Limits control
• nine arguments, more than: Improved foreach
• nine arguments, more than: Shift
• nine arguments, more than: Arguments
• numbers: Manual
• options, command line: Invoking m4
• output, diverting to files: Divert
• output, formatted: Format
• output, literal: Pseudo Arguments
• output, saving debugging: Debug Output
• overview of m4: Intro
• pattern substitution: Patsubst
• platform macros: Platform macros
• positional parameters, more than nine: Arguments
• POSIX: Extensions
• POSIXLY_CORRECT: Incompatibilities
• POSIXLY_CORRECT: Invoking m4
• preprocessor features: Preprocessor features
• printing error messages: Errprint
• pushdef stack: Stacks
• pushdef stack: Pushdef
• quadratic behavior, avoiding: Improved foreach
• quote delimiters, changing: Changequote
• quote manipulation: Shift
• quoted macro arguments: Quoting Arguments
• quoted string: Quoted strings
• quoting rule of thumb: Quoting Arguments
• recursive macros: Shift
• redefinition of macros, temporary: Pushdef
• regular expressions: Patsubst
• regular expressions: Regexp
• regular expressions: Changeword
• reloading a frozen file: Using frozen files
• renaming macros: Composition
• renaming macros: Defn
• reporting bugs: Bugs
• rescanning: Other Incompatibilities
• rescanning: Defn
• rescanning: Pseudo Arguments
• rescanning: Inhibiting Invocation
• rescanning: Limits control
• reversing arguments: Shift
• rule of thumb, quoting: Quoting Arguments
• running shell commands: Shell commands
• saving debugging output: Debug Output
• saving input: M4wrap
• search path for included files: Search Path
• shell commands, exit status from: Sysval
• shell commands, running: Shell commands
• short-circuiting conditional: Shift
• special arguments to macros: Pseudo Arguments
• stack, macro definition: Stacks
• stack, macro definition: Pushdef
• standard error, output to: Errprint
• standard error, output to: Trace
• standard error, output to: Dumpdef
• status of shell commands: Sysval
• status, setting m4 exit: M4exit
• string, quoted: Quoted strings
• strings, length of: Len
• substitution by regular expression: Patsubst
• substrings, extracting: Substr
• substrings, locating: Index macro
• suggestions, reporting: Bugs
• suppressing warnings: Macro Arguments
• switch statement: Ifelse
• synchronization lines: Preprocessor features
• syntax, changing: Changeword
• temporary file names: Mkstemp
• temporary redefinition of macros: Pushdef
• TMPDIR: Diversions
• tokens: Syntax
• tokens, builtin macro: Defn
• tokens, special: Other tokens
• tracing macro expansion: Trace
• translating characters: Translit
• undefining macros: Undefine
• UNIX commands, exit status from: Sysval
• UNIX commands, running: Shell commands
• variables, local: Pushdef
• warnings, suppressing: Macro Arguments
• words: Names
• words, lexical structure of: Changeword