Artistic Style 1.21

A Free, Fast and Small Automatic Formatter
for C, C++, C#, and Java Source Code

 

 

General Information

Line Endings
Line endings in the formatted file will be the same as the input file. If there are mixed line endings the most frequent occurrence will be used.

File Type
Artistic Style will determine the file type from the file extension. The extension ".java" indicates a Java file, and ".cs" indicates a C# file. Everything else is a C or C++ file. If you are using a non-standard file extension for Java or C#, use one of the --mode= options described in "Formatting Options".

Quick Start
If you have never used Artistic Style there are a couple of ways to start. One is to run it with no options at all. This will format the file with 4 spaces per indent and will leave the brackets unchanged. Another is to use one of the predefined styles described in the "Predefined Style Options". Select one with a bracket formatting style you like. Once you are familiar with the options you can customize the format to your personal preference.

 

Usage

Artistic style is a console program that receives information from the command line. The format of the command line is:

astyle [options]   SourceFile1.cpp  SourceFile2.cpp  SourceFile3.cpp [ . . . ]

Or to save the file with a different name:

astyle [options] < OriginalSourceFile > BeautifiedSourceFile

The < and > characters are used to redirect the files into standard input and out of standard output - don't forget them!

The block parens [ ] indicate that more than one option or more than one filename can be entered. They are NOT actually included in the command. For the options format see the following Options section.

With the first option, the newly indented file retains the original file name , while a copy of the original file is created with a .orig appended to the original file name. (This can be set to a different string by the option --suffix=, or suppressed altogether by the options -n or --suffix=none). Thus, after indenting SourceFile1.cpp as above, the indented result will be named SourceFile1.cpp, while the original pre-indented file will be renamed to SourceFile1.cpp.orig.

With the second option, the file is saved with a different name. Therefore a copy is not created.

Wildcards (such as "*.cpp"), can be used if the project is compiled to include them. See the Installation Information for instructions.

 

Options File

A default options file may be used to set your favorite source style.

 

Options

Not specifying any option will result in C/C++ style indentation, no change in bracket placement, 4 spaces per indent, and no formatting changes.

Options may be written in two different ways:

 


Predefined Style Options

Predefined Style options define the style by setting several other options. If other options are also used, the placement of the predefined style option in the command line is important. If the predefined style option is placed first, the other options may override the predefined style. If placed last, the predefined style will override the other options.

For example the style --style=ansi sets the option --brackets=break . If the command line specifies "--style=ansi --brackets=attach", the brackets will be attached and the style will not be ansi style. If the order on the command line is reversed to "--brackets=attach --style=ansi ", the brackets will be broken (ansi style) and the attach option will be ignored.

For the options set by each style check the parseOption function in astyle_main.cpp.

--style=ansi
ANSI style formatting/indenting. Brackets are broken, indentation is 4 spaces. Namespaces, classes, and switches are NOT indented.

namespace foospace
{
int Foo()
{
    if (isBar)
    {
        bar();
        return 1;
    }
    else
        return 0;
}
}


--style=gnu
GNU style formatting/indenting.  Brackets are broken, blocks are indented, indentation is 2 spaces. Namespaces, classes, and switches are NOT indented.

namespace foospace
  {
    int Foo()
      {
        if (isBar)
          {
            bar();
            return 1;
          }
        else
          return 0;
      }
  }


--style=kr
Kernighan&Ritchie style formatting/indenting. Brackets are attached, indentation is 4 spaces. Namespaces, classes, and switches are NOT indented.

namespace foospace {
int Foo() {
    if (isBar) {
        bar();
        return 1;
    } else
        return 0;
}
}


--style=linux
Linux style formatting/indenting. All brackets are linux style, indentation is 8 spaces. Namespaces, classes, and switches are NOT indented.

namespace foospace
{
int Foo()
{
        if (isBar) {
                bar();
                return 1;
        } else
                return 0;
}
}


--style=java
Java style formatting/indenting. Brackets are attached, indentation is 4 spaces. Switches are NOT indented.

class foospace {
    int Foo() {
        if (isBar) {
            bar();
            return 1;
        } else
            return 0;
    }
}

Tab and Bracket Options

default indent option
If no indentation option is set, the default option of 4 spaces will be used (e.g. -s4 --indent=spaces=4).

--indent=spaces=# / -s#
Indent using # spaces per indent (e.g. -s6 --indent=spaces=6). # must be between 2 and 20. Not specifying # will result in a default of 4 spaces per indent.

--indent=tab / --indent=tab=# / -t#
Indent using tab characters. Treat each tab as # spaces (e.g. -t6 / --indent=tab=6). # must be between 2 and 20. If no # is set, treats tabs as 4 spaces.

--force-indent=tab=# / -T#
Indent using tab characters. Treat each tab as # spaces (e.g. -T6 / --force-indent=tab=6). Uses tabs as indents where --indent=tab prefers to use spaces, such as inside multi-line statements. # must be between 2 and 20. If no # is set, treats tabs as 4 spaces.


default brackets option
If no brackets option is set, the brackets will not be changed.

--brackets=break / -b
Break brackets from their pre-block statements ( e.g. ANSI C / C++ style ).

void Foo(bool isFoo)
{
    if (isFoo)
    {
        bar();
    }
    else
    {
        anotherBar();
    }
}


--brackets=attach / -a
Attach brackets to their pre-block statements ( e.g. Java / K&R style ).

void Foo(bool isFoo) {
    if (isFoo) {
        bar();
    } else {
        anotherBar();
    }
}


--brackets=linux / -l
Break brackets from class and function declarations, but attach brackets to pre-block command statements.

void Foo(bool isFoo)
{
    if (isFoo) {
        bar();
    } else {
        anotherBar;
    }
}


--brackets=break-closing / -y
When used with either --brackets=attach or --brackets=linux, breaks closing headers (e.g. 'else', 'catch', ...) from their immediately preceding closing brackets.

void Foo(bool isFoo) {
    if (isFoo) {
        bar();
    } else {
        anotherBar();
    }
}

becomes (with a broken 'else'):

void Foo(bool isFoo) {
    if (isFoo) {
        bar();
    }
    else {
        anotherBar();
    }
}

Indentation Options

--indent-classes / -C
Indent 'class' and 'struct' blocks so that the blocks 'public:', 'protected:' and 'private:' are indented. The entire block is indented. This option has no effect on Java and C# files.

class Foo
{
public:
    Foo();
    virtual ~Foo();
};

becomes:

class Foo
{
    public:
        Foo();
        virtual ~Foo();
};


--indent-switches / -S
Indent 'switch' blocks so that the 'case X:' statements are indented in the switch block. The entire case block is indented.

switch (foo)
{
case 1:
    a += 1;
    break;

case 2:
{
    a += 2;
    break;
}    
}

becomes:

switch (foo)
{
    case 1:
        a += 1;
        break;

    case 2:
    {
        a += 2;
        break;
    }        
}


--indent-cases / -K
Indent 'case X:' blocks from the 'case X:' headers. Case statements not enclosed in blocks are NOT indented.

switch (foo)
{
    case 1:
        a += 1;
        break;

    case 2:
    {
        a += 2;
        break;
    }
}

becomes:

switch (foo)
{
    case 1:
        a += 1;
        break;

    case 2:
        {
            a += 2;
            break;
        }
}


--indent-blocks / -G
Add extra indentation to entire blocks.

if (isFoo)
{
    bar();
}
else
    anotherBar();

becomes:

if (isFoo)
    {
        bar();
    }
else
    anotherBar();


--indent-brackets / -B
Add extra indentation to brackets. This option has no effect if --indent-blocks is used.

if (isFoo)
{
    bar();
}
else
    anotherBar();

becomes:

if (isFoo)
    {
    bar();
    }
else
    anotherBar();


--indent-namespaces / -N
Add extra indentation to namespace blocks.

namespace foospace
{
class Foo
{
    public:
        Foo();
        virtual ~Foo();
};
}

becomes:

namespace foospace
{
    class Foo
    {
        public:
            Foo();
            virtual ~Foo();
    };
}


--indent-labels / -L
Add extra indentation to labels so they appear 1 indent less than the current indentation, rather than being flushed to the left (the default).

int foo() {
    while (isFoo) {
        ...
        if (isFoo)
            goto error;
    }

error:
        ...
}

becomes (with indented 'error'):

int foo() {
    while (isFoo) {
        ...
        if (isFoo)
            goto error;
    }
 
     error:
         ...
}


--indent-preprocessor / -w
Indent multi-line preprocessor definitions ending with a backslash. Should be used with --convert-tabs for proper results. Does a pretty good job, but can not perform miracles in obfuscated preprocessor definitions.

#define Is_Bar(arg,a,b) \
(Is_Foo((arg), (a)) \
|| Is_Foo((arg), (b)))

becomes:

#define Is_Bar(arg,a,b) \
    (Is_Foo((arg), (a)) \
     || Is_Foo((arg), (b)))


--max-instatement-indent=# / -M#
Indent a maximum of # spaces in a continuous statement, relative to the previous line (e.g. --max-instatement-indent=40). # must be less than 80. If no # is set, the default value of 40 will be used.

fooArray[] = { red,
         green,
         blue };

fooFunction(barArg1,
         barArg2,
         barArg3);

becomes (with larger value):

fooArray[] = { red,
               green,
               blue };

fooFunction(barArg1,
            barArg2,
            barArg3);


--min-conditional-indent=# / -m#
Set the minimal indent that is added when a header is built of multiple-lines. This indent makes helps to easily separate the header from the command statements that follow. The value for # must be less than 40. The default setting for this option is twice the current indent (e.g. --min-conditional-indent=8).

// default setting makes this non-bracketed code clear
if (a < b
        || c > d)
    foo++;

// but creates an exaggerated indent in this bracketed code
if (a < b
        || c > d)
{
    foo++;
}

becomes (when setting --min-conditional-indent=0):

// setting makes this non-bracketed code less clear
if (a < b
    || c > d)
    foo++;

// but makes this bracketed code clearer
if (a < b
    || c > d)
{
    foo++;
}

Formatting Options

--break-blocks / -f
Pad empty lines around header blocks (e.g. 'if', 'while'...). Be sure to read the Supplemental Documentation before using this option.

isFoo = true;
if (isFoo) {
    bar();
} else {
    anotherBar();
}
isBar = false;

becomes:

isFoo = true;

if (isFoo) {
    bar();
} else {
    anotherBar();
}

isBar = false;


--break-blocks=all / -F
Pad empty lines around header blocks (e.g. 'if', 'while'...). Treat closing header blocks (e.g. 'else', 'catch') as stand-alone blocks. Be sure to read the Supplemental Documentation before using this option.

isFoo = true;
if (isFoo) {
    bar();
} else {
    anotherBar();
}
isBar = false;

becomes:

isFoo = true;

if (isFoo) {
    bar();
    
} else {
    anotherBar();
}

isBar = false;


--break-elseifs / -e
Break 'else if' header combinations into separate lines. This option has no effect if one-line=keep-statements is used. This option cannot be undone.

if (isFoo) {
    bar();
}
else if (isFoo1()) {
    bar1();
}
else if (isFoo2()) }
    bar2;
}

becomes:

if (isFoo) {
    bar();
}
else
    if (isFoo1()) {
        bar1();
    }
    else
        if (isFoo2()) {
            bar2();
        }


--pad=oper / -p
Insert space padding around operators. Operators inside block parens [] are not padded. Note that there is no option to unpad. Once padded, they stay padded.

if (foo==2)
    a=bar((b-c)*a,*d--);

becomes:

if (foo == 2)
     a = bar((b - c) * a, *d--);


--pad=paren / -P
Insert space padding around parenthesis on both the outside and the inside.

if (isFoo(a, b))
    bar(a, b);

becomes:

if ( isFoo ( a, b ) )
    bar ( a, b );


--pad=paren-out / -d
Insert space padding around parenthesis on the outside only. This can be used with unpad=paren below to remove unwanted spaces.

if (isFoo(a, b))
    bar(a, b);

becomes:

if (isFoo (a, b) )
    bar (a, b);


--pad=paren-in / -D
Insert space padding around parenthesis on the inside only. This can be used with unpad=paren below to remove unwanted spaces.

if (isFoo(a, b))
    bar(a, b);

becomes:

if ( isFoo( a, b ) )
    bar( a, b );


--unpad=paren / -U
Remove space padding around parenthesis on the inside and outside. Can be used in combination with the paren padding options pad=paren-out and pad=paren-in above. Only padding that has not been requested by other options will be removed.

For example, if a source has parens padded on both the inside and outside, and you want inside only. You need to use unpad=paren to remove the outside padding, and pad=paren-in to retain the inside padding. Using only pad=paren-in would not remove the outside padding.

if ( isFoo( a, b ) )
    bar ( a, b );

becomes (with no padding option requested):

if (isFoo(a, b))
    bar(a, b);


--one-line=keep-statements / -o
Don't break complex statements and multiple statements residing on a single line.

if (isFoo)
{
    isFoo = false; cout << isFoo << endl;
}

remains as is.

if (isFoo) DoBar();

remains as is.


--one-line=keep-blocks / -O
Don't break one-line blocks.

if (isFoo)
{ isFoo = false; cout << isFoo << endl; }

remains as is.


--convert-tabs / -V
Converts tabs into single spaces.


--fill-empty-lines / -E
Fill empty lines with the white space of the previous line.


--mode=c
Indent a C or C++ file. The option is set from the file extension for each file. You can override the setting with this entry. It allows the formatter to identify language specific syntax such as C++ classes, templates, and keywords.

--mode=java
Indent a Java file. The option is set from the file extension for each file. You can override the setting with this entry. It allows the formatter to identify language specific syntax such as Java classes keywords.

--mode=cs
Indent a C sharp file. The option is set from the file extension for each file. You can override the setting with this entry. It allows the formatter to identify language specific syntax such as C sharp classes and keywords.


Other Options

--suffix=####
Append the suffix #### instead of '.orig' to original filename (e.g. --suffix=.bak). If this is to be a file extension, the dot '.' must be included. Otherwise the suffix will be appended to the current file extension.

--suffix=none / -n
Do not retain a backup of the original file. The original file is purged after it is formatted.

--options=####
Specify an options file #### to read and use.

--options=none
Disable the default options file. Only the command-line parameters will be used.

--errors-to-stdout / -X
Print errors to standard-output rather than to standard-error.
This option should be helpful for systems/shells that do not have this option, such as in Windows95.

--preserve-date / -Z
Preserve the original file's date and time modified. The date and time modified will not be changed in the formatted file. This option is not effective if redirection is used.

--version / -v
Print version number.

--help / -h / -?
Print a help message and quit.


 

ENJOY !!!