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indent.txt    For Vim version 7.4.  Last change: 2014 Apr 23


                  VIM REFERENCE MANUAL    by Bram Moolenaar


This file is about indenting C programs and other files.

1. Indenting C style programs   C-indenting
2. Indenting by expression      indent-expression

==============================================================================
1. Indenting C style programs                           C-indenting

The basics for C style indenting are explained in section 30.2 of the user
manual.

Vim has options for automatically indenting C style program files. Many
programming languages including Java and C++ follow very closely the
formatting conventions established with C.  These options affect only the
indent and do not perform other formatting.  There are additional options that
affect other kinds of formatting as well as indenting, see format-comments,
fo-table, gq and formatting for the main ones.

Note that this will not work when the +smartindent or +cindent features
have been disabled at compile time.

There are in fact four main methods available for indentation, each one
overrides the previous if it is enabled, or non-empty for 'indentexpr':
'autoindent'    uses the indent from the previous line.
'smartindent'   is like 'autoindent' but also recognizes some C syntax to
                increase/reduce the indent where appropriate.
'cindent'       Works more cleverly than the other two and is configurable to
                different indenting styles.
'indentexpr'    The most flexible of all: Evaluates an expression to compute
                the indent of a line.  When non-empty this method overrides
                the other ones.  See indent-expression.
The rest of this section describes the 'cindent' option.

Note that 'cindent' indenting does not work for every code scenario.  Vim
is not a C compiler: it does not recognize all syntax.  One requirement is
that toplevel functions have a '{' in the first column.  Otherwise they are
easily confused with declarations.

These four options control C program indenting:
'cindent'       Enables Vim to perform C program indenting automatically.
'cinkeys'       Specifies which keys trigger reindenting in insert mode.
'cinoptions'    Sets your preferred indent style.
'cinwords'      Defines keywords that start an extra indent in the next line.

If 'lisp' is not on and 'equalprg' is empty, the "=" operator indents using
Vim's built-in algorithm rather than calling an external program.

See autocommand for how to set the 'cindent' option automatically for C code
files and reset it for others.

                                        cinkeys-format indentkeys-format
The 'cinkeys' option is a string that controls Vim's indenting in response to
typing certain characters or commands in certain contexts.  Note that this not
only triggers C-indenting.  When 'indentexpr' is not empty 'indentkeys' is
used instead.  The format of 'cinkeys' and 'indentkeys' is equal.

The default is "0{,0},0),:,0#,!^F,o,O,e" which specifies that indenting occurs
as follows:

        "0{"    if you type '{' as the first character in a line
        "0}"    if you type '}' as the first character in a line
        "0)"    if you type ')' as the first character in a line
        ":"     if you type ':' after a label or case statement
        "0#"    if you type '#' as the first character in a line
        "!^F"   if you type CTRL-F (which is not inserted)
        "o"     if you type a <CR> anywhere or use the "o" command (not in
                insert mode!)
        "O"     if you use the "O" command (not in insert mode!)
        "e"     if you type the second 'e' for an "else" at the start of a
                line

Characters that can precede each key:                           i_CTRL-F
!       When a '!' precedes the key, Vim will not insert the key but will
        instead reindent the current line.  This allows you to define a
        command key for reindenting the current line.  CTRL-F is the default
        key for this.  Be careful if you define CTRL-I for this because CTRL-I
        is the ASCII code for <Tab>.
*       When a '*' precedes the key, Vim will reindent the line before
        inserting the key.  If 'cinkeys' contains "*<Return>", Vim reindents
        the current line before opening a new line.
0       When a zero precedes the key (but appears after '!' or '*') Vim will
        reindent the line only if the key is the first character you type in
        the line.  When used before "=" Vim will only reindent the line if
        there is only white space before the word.

When neither '!' nor '*' precedes the key, Vim reindents the line after you
type the key.  So ';' sets the indentation of a line which includes the ';'.

Special key names:
<>      Angle brackets mean spelled-out names of keys.  For example: "<Up>",
        "<Ins>" (see key-notation).
^       Letters preceded by a caret (^) are control characters.  For example:
        "^F" is CTRL-F.
o       Reindent a line when you use the "o" command or when Vim opens a new
        line below the current one (e.g., when you type <Enter> in insert
        mode).
O       Reindent a line when you use the "O" command.
e       Reindent a line that starts with "else" when you type the second 'e'.
:       Reindent a line when a ':' is typed which is after a label or case
        statement.  Don't reindent for a ":" in "class::method" for C++.  To
        Reindent for any ":", use "<:>".
=word   Reindent when typing the last character of "word".  "word" may
        actually be part of another word.  Thus "=end" would cause reindenting
        when typing the "d" in "endif" or "endwhile".  But not when typing
        "bend".  Also reindent when completion produces a word that starts
        with "word".  "0=word" reindents when there is only white space before
        the word.
=~word  Like =word, but ignore case.

If you really want to reindent when you type 'o', 'O', 'e', '0', '<', '>',
'*', ':' or '!', use "<o>", "<O>", "<e>", "<0>", "<<>", "<>>", "<*>", "<:>" or
"<!>", respectively, for those keys.

For an emacs-style indent mode where lines aren't indented every time you
press <Enter> but only if you press <Tab>, I suggest:
        :set cinkeys=0{,0},:,0#,!<Tab>,!^F
You might also want to switch off 'autoindent' then.

Note: If you change the current line's indentation manually, Vim ignores the
cindent settings for that line.  This prevents vim from reindenting after you
have changed the indent by typing <BS>, <Tab>, or <Space> in the indent or
used CTRL-T or CTRL-D.

                                                cinoptions-values
The 'cinoptions' option sets how Vim performs indentation.  The value after
the option character can be one of these (N is any number):
        N       indent N spaces
        -N      indent N spaces to the left
        Ns      N times 'shiftwidth' spaces
        -Ns     N times 'shiftwidth' spaces to the left

In the list below,
"N" represents a number of your choice (the number can be negative).  When
there is an 's' after the number, Vim multiplies the number by 'shiftwidth':
"1s" is 'shiftwidth', "2s" is two times 'shiftwidth', etc.  You can use a
decimal point, too: "-0.5s" is minus half a 'shiftwidth'.
The examples below assume a 'shiftwidth' of 4.
                                                        cino->
        >N    Amount added for "normal" indent.  Used after a line that should
              increase the indent (lines starting with "if", an opening brace,
              etc.).  (default 'shiftwidth').

                cino=               cino=>2             cino=>2s 
                  if (cond)           if (cond)           if (cond)
                  {                   {                   {
                      foo;              foo;                      foo;
                  }                   }                   }

                                                        cino-e
        eN    Add N to the prevailing indent inside a set of braces if the
              opening brace at the End of the line (more precise: is not the
              first character in a line).  This is useful if you want a
              different indent when the '{' is at the start of the line from
              when '{' is at the end of the line.  (default 0).

                cino=               cino=e2             cino=e-2 
                  if (cond) {         if (cond) {         if (cond) {
                      foo;                  foo;            foo;
                  }                   }                   }
                  else                else                else
                  {                   {                   {
                      bar;                bar;                bar;
                  }                   }                   }

                                                        cino-n
        nN    Add N to the prevailing indent for a statement after an "if",
              "while", etc., if it is NOT inside a set of braces.  This is
              useful if you want a different indent when there is no '{'
              before the statement from when there is a '{' before it.
              (default 0).

                cino=               cino=n2             cino=n-2 
                  if (cond)           if (cond)           if (cond)
                      foo;                  foo;            foo;
                  else                else                else
                  {                   {                   {
                      bar;                bar;                bar;
                  }                   }                   }

                                                        cino-f
        fN    Place the first opening brace of a function or other block in
              column N.  This applies only for an opening brace that is not
              inside other braces and is at the start of the line.  What comes
              after the brace is put relative to this brace.  (default 0).

                cino=               cino=f.5s           cino=f1s 
                  func()              func()              func()
                  {                     {                     {
                      int foo;              int foo;              int foo;

                                                        cino-{
        {N    Place opening braces N characters from the prevailing indent.
              This applies only for opening braces that are inside other
              braces.  (default 0).

                cino=               cino={.5s           cino={1s 
                  if (cond)           if (cond)           if (cond)
                  {                     {                     {
                      foo;                foo;                foo;

                                                        cino-}
        }N    Place closing braces N characters from the matching opening
              brace.  (default 0).

                cino=               cino={2,}-0.5s      cino=}2 
                  if (cond)           if (cond)           if (cond)
                  {                     {                 {
                      foo;                foo;                foo;
                  }                   }                     }

                                                        cino-^
        ^N    Add N to the prevailing indent inside a set of braces if the
              opening brace is in column 0.  This can specify a different
              indent for whole of a function (some may like to set it to a
              negative number).  (default 0).

                cino=               cino=^-2            cino=^-s 
                  func()              func()              func()
                  {                   {                   {
                      if (cond)         if (cond)         if (cond)
                      {                 {                 {
                          a = b;            a = b;            a = b;
                      }                 }                 }
                  }                   }                   }

                                                        cino-L
        LN    Controls placement of jump labels. If N is negative, the label
              will be placed at column 1. If N is non-negative, the indent of
              the label will be the prevailing indent minus N.  (default -1).

                cino=               cino=L2             cino=Ls 
                  func()              func()              func()
                  {                   {                   {
                      {                   {                   {
                          stmt;               stmt;               stmt;
                  LABEL:                    LABEL:            LABEL:
                      }                   }                   }
                  }                   }                   }

                                                        cino-:
        :N    Place case labels N characters from the indent of the switch().
              (default 'shiftwidth').

                cino=               cino=:0 
                  switch (x)          switch(x)
                  {                   {
                      case 1:         case 1:
                          a = b;          a = b;
                      default:        default:
                  }                   }

                                                        cino-=
        =N    Place statements occurring after a case label N characters from
              the indent of the label.  (default 'shiftwidth').

                cino=               cino==10 
                   case 11:             case 11:  a = a + 1;
                       a = a + 1;                 b = b + 1;

                                                        cino-l
        lN    If N != 0 Vim will align with a case label instead of the
              statement after it in the same line.

                cino=                       cino=l1 
                    switch (a) {              switch (a) {
                        case 1: {                 case 1: {
                                    break;            break;
                                }                 }

                                                        cino-b
        bN    If N != 0 Vim will align a final "break" with the case label,
              so that case..break looks like a sort of block.  (default: 0).
              When using 1, consider adding "0=break" to 'cinkeys'.

                cino=               cino=b1 
                  switch (x)          switch(x)
                  {                   {
                      case 1:             case 1:
                          a = b;              a = b;
                          break;          break;

                      default:            default:
                          a = 0;              a = 0;
                          break;          break;
                  }                   }

                                                        cino-g
        gN    Place C++ scope declarations N characters from the indent of the
              block they are in.  (default 'shiftwidth').  A scope declaration
              can be "public:", "protected:" or "private:".

                cino=               cino=g0 
                  {                   {
                      public:         public:
                          a = b;          a = b;
                      private:        private:
                  }                   }

                                                        cino-h
        hN    Place statements occurring after a C++ scope declaration N
              characters from the indent of the label.  (default
              'shiftwidth').

                cino=               cino=h10 
                   public:              public:   a = a + 1;
                       a = a + 1;                 b = b + 1;

                                                        cino-N
        NN    Indent inside C++ namespace N characters extra compared to a
              normal block.  (default 0).

                cino=                      cino=N-s 
                  namespace {                namespace {
                      void function();       void function();
                  }                          }

                  namespace my               namespace my
                  {                          {
                      void function();       void function();
                  }                          }

                                                        cino-p
        pN    Parameter declarations for K&R-style function declarations will
              be indented N characters from the margin.  (default
              'shiftwidth').

                cino=               cino=p0             cino=p2s 
                  func(a, b)          func(a, b)          func(a, b)
                      int a;          int a;                      int a;
                      char b;         char b;                     char b;

                                                        cino-t
        tN    Indent a function return type declaration N characters from the
              margin.  (default 'shiftwidth').

                cino=               cino=t0             cino=t7 
                      int             int                        int
                  func()              func()              func()

                                                        cino-i
        iN    Indent C++ base class declarations and constructor
              initializations, if they start in a new line (otherwise they
              are aligned at the right side of the ':').
              (default 'shiftwidth').

                cino=                     cino=i0 
                  class MyClass :           class MyClass :
                      public BaseClass      public BaseClass
                  {}                        {}
                  MyClass::MyClass() :      MyClass::MyClass() :
                      BaseClass(3)          BaseClass(3)
                  {}                        {}

                                                        cino-+
        +N    Indent a continuation line (a line that spills onto the next)
              inside a function N additional characters.  (default
              'shiftwidth').
              Outside of a function, when the previous line ended in a
              backslash, the 2 * N is used.

                cino=                     cino=+10 
                  a = b + 9 *               a = b + 9 *
                      c;                              c;

                                                        cino-c
        cN    Indent comment lines after the comment opener, when there is no
              other text with which to align, N characters from the comment
              opener.  (default 3).  See also format-comments.

                cino=                     cino=c5 
                  /*                        /*
                     text.                       text.
                   */                        */

                                                        cino-C
        CN    When N is non-zero, indent comment lines by the amount specified
              with the c flag above even if there is other text behind the
              comment opener.  (default 0).

                cino=c0                   cino=c0,C1 
                  /********                 /********
                    text.                   text.
                  ********/                 ********/
             (Example uses ":set comments& comments-=s1:/* comments^=s0:/*")

                                                        cino-/
        /N    Indent comment lines N characters extra.  (default 0).
                cino=                     cino=/4 
                  a = b;                    a = b;
                  /* comment */                 /* comment */
                  c = d;                    c = d;

                                                        cino-(
        (N    When in unclosed parentheses, indent N characters from the line
              with the unclosed parentheses.  Add a 'shiftwidth' for every
              unclosed parentheses.  When N is 0 or the unclosed parentheses
              is the first non-white character in its line, line up with the
              next non-white character after the unclosed parentheses.
              (default 'shiftwidth' * 2).

                cino=                     cino=(0 
                  if (c1 && (c2 ||          if (c1 && (c2 ||
                              c3))                     c3))
                      foo;                      foo;
                  if (c1 &&                 if (c1 &&
                          (c2 || c3))           (c2 || c3))
                     {                         {

                                                        cino-u
        uN    Same as (N, but for one level deeper.  (default 'shiftwidth').

                cino=                     cino=u2 
                  if (c123456789            if (c123456789
                          && (c22345                && (c22345
                              || c3))                 || c3))

                                                        cino-U
        UN    When N is non-zero, do not ignore the indenting specified by
              ( or u in case that the unclosed parentheses is the first
              non-white character in its line.  (default 0).

                cino= or cino=(s          cino=(s,U1 
                  c = c1 &&                 c = c1 &&
                      (                         (
                       c2 ||                        c2 ||
                       c3                           c3
                      ) && c4;                  ) && c4;

                                                        cino-w
        wN    When in unclosed parentheses and N is non-zero and either
              using "(0" or "u0", respectively, or using "U0" and the unclosed
              parentheses is the first non-white character in its line, line
              up with the character immediately after the unclosed parentheses
              rather than the first non-white character.  (default 0).

                cino=(0                   cino=(0,w1 
                  if (   c1                 if (   c1
                         && (   c2              && (   c2
                                || c3))             || c3))
                      foo;                      foo;

                                                        cino-W
        WN    When in unclosed parentheses and N is non-zero and either
              using "(0" or "u0", respectively and the unclosed parentheses is
              the last non-white character in its line and it is not the
              closing parentheses, indent the following line N characters
              relative to the outer context (i.e. start of the line or the
              next unclosed parentheses).  (default: 0).

                cino=(0                    cino=(0,W4 
                  a_long_line(              a_long_line(
                              argument,         argument,
                              argument);        argument);
                  a_short_line(argument,    a_short_line(argument,
                               argument);                argument);

                                                        cino-k
        kN    When in unclosed parentheses which follow "if", "for" or
              "while" and N is non-zero, overrides the behaviour defined by
              "(N": causes the indent to be N characters relative to the outer
              context (i.e. the line where "if", "for" or "while" is).  Has
              no effect on deeper levels of nesting.  Affects flags like "wN"
              only for the "if", "for" and "while" conditions.  If 0, defaults
              to behaviour defined by the "(N" flag.  (default: 0).

                cino=(0                    cino=(0,ks 
                  if (condition1            if (condition1
                      && condition2)                && condition2)
                      action();                 action();
                  function(argument1        function(argument1
                           && argument2);            && argument2);

                                                        cino-m
        mN    When N is non-zero, line up a line starting with a closing
              parentheses with the first character of the line with the
              matching opening parentheses.  (default 0).

                cino=(s                   cino=(s,m1 
                  c = c1 && (               c = c1 && (
                      c2 ||                     c2 ||
                      c3                        c3
                      ) && c4;              ) && c4;
                  if (                      if (
                      c1 && c2                  c1 && c2
                     )                      )
                      foo;                      foo;

                                                        cino-M
        MN    When N is non-zero, line up a line starting with a closing
              parentheses with the first character of the previous line.
              (default 0).

                cino=                     cino=M1 
                  if (cond1 &&              if (cond1 &&
                         cond2                     cond2
                     )                             )

                                java-cinoptions java-indenting cino-j
        jN    Indent Java anonymous classes correctly.  Also works well for
              Javascript.  The value 'N' is currently unused but must be
              non-zero (e.g. 'j1').  'j1' will indent for example the
              following code snippet correctly: 

                object.add(new ChangeListener() {
                    public void stateChanged(ChangeEvent e) {
                        do_something();
                    }
                });

                        javascript-cinoptions javascript-indenting cino-J
        JN    Indent JavaScript object declarations correctly by not confusing
              them with labels.  The value 'N' is currently unused but must be 
              non-zero (e.g. 'J1').  If you enable this you probably also want
              to set cino-j. 

                var bar = {
                    foo: {
                        that: this,
                        some: ok,
                    },
                    "bar":{ 
                        a : 2,
                        b: "123abc",
                        x: 4,
                        "y": 5
                    }
                }

                                                                cino-)
        )N    Vim searches for unclosed parentheses at most N lines away.
              This limits the time needed to search for parentheses.  (default
              20 lines).

                                                                cino-star
        *N    Vim searches for unclosed comments at most N lines away.  This
              limits the time needed to search for the start of a comment.
              If your /* */ comments stop indenting after N lines this is the
              value you will want to change.
              (default 70 lines).

                                                                cino-#
        #N    When N is non-zero recognize shell/Perl comments starting with
              '#', do not recognize preprocessor lines; allow right-shifting
              lines that start with "#".
              When N is zero (default): don't recognize '#' comments, do
              recognize preprocessor lines; right-shifting lines that start
              with "#" does not work.


The defaults, spelled out in full, are:
        cinoptions=>s,e0,n0,f0,{0,}0,^0,L-1,:s,=s,l0,b0,gs,hs,N0,ps,ts,is,+s,
                        c3,C0,/0,(2s,us,U0,w0,W0,k0,m0,j0,J0,)20,*70,#0

Vim puts a line in column 1 if:
- It starts with '#' (preprocessor directives), if 'cinkeys' contains '#0'.
- It starts with a label (a keyword followed by ':', other than "case" and
  "default") and 'cinoptions' does not contain an 'L' entry with a positive
  value.
- Any combination of indentations causes the line to have less than 0
  indentation.

==============================================================================
2. Indenting by expression                              indent-expression

The basics for using flexible indenting are explained in section 30.3 of the
user manual.

If you want to write your own indent file, it must set the 'indentexpr'
option.  Setting the 'indentkeys' option is often useful.  See the
$VIMRUNTIME/indent directory for examples.


REMARKS ABOUT SPECIFIC INDENT FILES 


CLOJURE                                 ft-clojure-indent clojure-indent

Clojure indentation differs somewhat from traditional Lisps, due in part to
the use of square and curly brackets, and otherwise by community convention.
These conventions are not universally followed, so the Clojure indent script
offers a few configurable options, listed below.

If the current vim does not include searchpairpos(), the indent script falls
back to normal 'lisp' indenting, and the following options are ignored.

                                                        g:clojure_maxlines

Set maximum scan distance of searchpairpos(). Larger values trade performance
for correctness when dealing with very long forms. A value of 0 will scan
without limits.

        " Default
        let g:clojure_maxlines = 100

                                                g:clojure_fuzzy_indent
                                        g:clojure_fuzzy_indent_patterns
                                        g:clojure_fuzzy_indent_blacklist

The 'lispwords' option is a list of comma-separated words that mark special
forms whose subforms must be indented with two spaces.

For example:

        (defn bad []
              "Incorrect indentation")

        (defn good []
          "Correct indentation")

If you would like to specify 'lispwords' with a pattern instead, you can use
the fuzzy indent feature:

        " Default
        let g:clojure_fuzzy_indent = 1
        let g:clojure_fuzzy_indent_patterns = ['^with', '^def', '^let']
        let g:clojure_fuzzy_indent_blacklist =
                \ ['-fn$', '\v^with-%(meta|out-str|loading-context)$']

        " Legacy comma-delimited string version; the list format above is
        " recommended. Note that patterns are implicitly anchored with ^ and $
        let g:clojure_fuzzy_indent_patterns = 'with.*,def.*,let.*'

g:clojure_fuzzy_indent_patterns and g:clojure_fuzzy_indent_blacklist are
Lists of patterns that will be matched against the unquoted, unqualified
symbol at the head of a list. This means that a pattern like "^foo" will match
all these candidates: "foobar", "my.ns/foobar", and "#'foobar".

Each candidate word is tested for special treatment in this order:

        1. Return true if word is literally in 'lispwords'
        2. Return false if word matches a pattern in
           g:clojure_fuzzy_indent_blacklist
        3. Return true if word matches a pattern in
           g:clojure_fuzzy_indent_patterns
        4. Return false and indent normally otherwise

                                        g:clojure_special_indent_words

Some forms in Clojure are indented so that every subform is indented only two
spaces, regardless of 'lispwords'. If you have a custom construct that should
be indented in this idiosyncratic fashion, you can add your symbols to the
default list below.

        " Default
        let g:clojure_special_indent_words =
           \ 'deftype,defrecord,reify,proxy,extend-type,extend-protocol,letfn'

                                        g:clojure_align_multiline_strings

Align subsequent lines in multiline strings to the column after the opening
quote, instead of the same column.

For example:

        (def default
          "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
          eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
          enim ad minim veniam, quis nostrud exercitation ullamco laboris
          nisi ut aliquip ex ea commodo consequat.")

        (def aligned
          "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
           eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
           enim ad minim veniam, quis nostrud exercitation ullamco laboris
           nisi ut aliquip ex ea commodo consequat.")

This option is off by default.

        " Default
        let g:clojure_align_multiline_strings = 0

                                                g:clojure_align_subforms

By default, parenthesized compound forms that look like function calls and
whose head subform is on its own line have subsequent subforms indented by
two spaces relative to the opening paren:

        (foo
          bar
          baz)

Setting this option changes this behavior so that all subforms are aligned to
the same column, emulating the default behavior of clojure-mode.el:

        (foo
         bar
         baz)

This option is off by default.

        " Default
        let g:clojure_align_subforms = 0


FORTRAN                                                 ft-fortran-indent

Block if, select case, where, and forall constructs are indented.  So are
type, interface, associate, block, and enum constructs.  The indenting of
subroutines, functions, modules, and program blocks is optional.  Comments,
labelled statements and continuation lines are indented if the Fortran is in
free source form, whereas they are not indented if the Fortran is in fixed
source form because of the left margin requirements.  Hence manual indent
corrections will be necessary for labelled statements and continuation lines
when fixed source form is being used.  For further discussion of the method
used for the detection of source format see ft-fortran-syntax.

Do loops 
All do loops are left unindented by default.  Do loops can be unstructured in
Fortran with (possibly multiple) loops ending on a labelled executable
statement of almost arbitrary type.  Correct indentation requires
compiler-quality parsing.  Old code with do loops ending on labelled statements
of arbitrary type can be indented with elaborate programs such as Tidy
(http://www.unb.ca/chem/ajit/f_tidy.htm).  Structured do/continue loops are
also left unindented because continue statements are also used for purposes
other than ending a do loop.  Programs such as Tidy can convert structured
do/continue loops to the do/enddo form.  Do loops of the do/enddo variety can
be indented.  If you use only structured loops of the do/enddo form, you should
declare this by setting the fortran_do_enddo variable in your .vimrc as
follows 

   let fortran_do_enddo=1

in which case do loops will be indented.  If all your loops are of do/enddo
type only in, say, .f90 files, then you should set a buffer flag with an
autocommand such as 

  au! BufRead,BufNewFile *.f90 let b:fortran_do_enddo=1

to get do loops indented in .f90 files and left alone in Fortran files with
other extensions such as .for.

Program units 
The indenting of program units (subroutines, functions, modules, and program
blocks) is enabled by default but can be suppressed if a lighter, screen-width
preserving indent style is desired.  To suppress the indenting of program
units for all fortran files set the global fortran_indent_less variable in
your .vimrc as follows 

  let fortran_indent_less=1

A finer level of suppression can be achieved by setting the corresponding
buffer-local variable as follows 

  let b:fortran_indent_less=1


HTML                            ft-html-indent html-indent html-indenting

This is about variables you can set in your vimrc to customize HTML indenting.

You can set the indent for the first line after <script> and <style>
"blocktags" (default "zero"): 

      :let g:html_indent_script1 = "inc"
      :let g:html_indent_style1 = "inc"

      VALUE     MEANING 
      "zero"    zero indent
      "auto"    auto indent (same indent as the blocktag)
      "inc"     auto indent + one indent step

Many tags increase the indent for what follows per default (see "Add Indent
Tags" in the script).  You can add further tags with: 

      :let g:html_indent_inctags = "html,body,head,tbody"

You can also remove such tags with: 

      :let g:html_indent_autotags = "th,td,tr,tfoot,thead"

Default value is empty for both variables.  Note: the initial "inctags" are
only defined once per Vim session.

User variables are only read when the script is sourced.  To enable your
changes during a session, without reloading the HTML file, you can manually
do: 

      :call HtmlIndent_CheckUserSettings()

Detail:
  Calculation of indent inside "blocktags" with "alien" content:
      BLOCKTAG   INDENT EXPR        WHEN APPLICABLE 
      <script> : {customizable}     if first line of block
               : cindent(v:lnum)    if attributes empty or contain "java"
               : -1                 else (vbscript, tcl, ...)
      <style>  : {customizable}     if first line of block
               : GetCSSIndent()     else
      <!-- --> : -1


PHP                             ft-php-indent php-indent php-indenting

NOTE:   PHP files will be indented correctly only if PHP syntax is active.

If you are editing a file in Unix 'fileformat' and '\r' characters are present
before new lines, indentation won't proceed correctly ; you have to remove
those useless characters first with a command like: 

    :%s /\r$//g

Or, you can simply :let the variable PHP_removeCRwhenUnix to 1 and the
script will silently remove them when Vim loads a PHP file (at each BufRead).

OPTIONS: 

PHP indenting can be altered in several ways by modifying the values of some
global variables:

                                        php-comment PHP_autoformatcomment
To not enable auto-formating of comments by default (if you want to use your
own 'formatoptions'): 
    :let g:PHP_autoformatcomment = 0

Else, 't' will be removed from the 'formatoptions' string and "qrowcb" will be
added, see fo-table for more information.
-------------

                                                        PHP_outdentSLComments
To add extra indentation to single-line comments: 
    :let g:PHP_outdentSLComments = N

With N being the number of 'shiftwidth' to add.

Only single-line comments will be affected such as: 
    # Comment
    // Comment
    /* Comment */
-------------

                                                        *PHP_default_indenting*
To add extra indentation to every PHP lines with N being the number of
'shiftwidth' to add: 
    :let g:PHP_default_indenting = N

For example, with N = 1, this will give:

    <?php
        if (!isset($History_lst_sel))
            if (!isset($History_lst_sel))
                if (!isset($History_lst_sel)) {
                    $History_lst_sel=0;
                } else
                    $foo="bar";

        $command_hist = TRUE;
    ?>
(Notice the extra indentation between the PHP container markers and the code)
-------------

                                                        PHP_outdentphpescape
To indent PHP escape tags as the surrounding non-PHP code (only affects the
PHP escape tags): 
:let g:PHP_outdentphpescape = 0
-------------

                                                        PHP_removeCRwhenUnix
To automatically remove '\r' characters when the 'fileformat' is set to Unix: 
    :let g:PHP_removeCRwhenUnix = 1
-------------

                                                        *PHP_BracesAtCodeLevel*
To indent braces at the same level than the code they contain: 
    :let g:PHP_BracesAtCodeLevel = 1
    
This will give the following result: 
    if ($foo)
        {
        foo();
        }
Instead of: 
    if ($foo)
    {
        foo();
    }

NOTE:   Indenting will be a bit slower if this option is used because some
        optimizations won't be available.
-------------

                                                        PHP_vintage_case_default_indent
To indent 'case:' and 'default:' statements in switch() blocks: 
    :let g:PHP_vintage_case_default_indent = 1

In PHP braces are not required inside 'case/default' blocks therefore 'case:'
and 'default:' are indented at the same level than the 'switch()' to avoid
meaningless indentation. You can use the above option to return to the
traditional way.


PYTHON                                                  ft-python-indent

The amount of indent can be set for the following situations.  The examples
given are the defaults.  Note that the variables are set to an expression, so
that you can change the value of 'shiftwidth' later.

Indent after an open paren: 
        let g:pyindent_open_paren = '&sw * 2'
Indent after a nested paren: 
        let g:pyindent_nested_paren = '&sw'
Indent for a continuation line: 
        let g:pyindent_continue = '&sw * 2'


R                                                               ft-r-indent

Function arguments are aligned if they span for multiple lines. If you prefer
do not have the arguments of functions aligned, put in your vimrc:

   let r_indent_align_args = 0

All lines beginning with a comment character, #, get the same indentation
level of the normal R code. Users of Emacs/ESS may be used to have lines
beginning with a single # indented in the 40th column, ## indented as R code,
and ### not indented. If you prefer that lines beginning with comment
characters are aligned as they are by Emacs/ESS, put in your vimrc:

   let r_indent_ess_comments = 1

If you prefer that lines beginning with a single # are aligned at a column
different from the 40th one, you should set a new value to the variable
r_indent_comment_column, as in the example below:

   let r_indent_comment_column = 30

Any code after a line that ends with "<-" is indented. Emacs/ESS does not
indent the code if it is a top level function. If you prefer that the
Vim-R-plugin behaves like Emacs/ESS in this regard, put in your vimrc:

   let r_indent_ess_compatible = 1

Below is an example of indentation with and without this option enabled:

   ### r_indent_ess_compatible = 1           ### r_indent_ess_compatible = 0
   foo <-                                    foo <-
       function(x)                               function(x)
   {                                             {
       paste(x)                                      paste(x)
   }                                             }


SHELL                                                   ft-sh-indent

The amount of indent applied under various circumstances in a shell file can
be configured by setting the following keys in the Dictionary
b:sh_indent_defaults to a specific amount or to a Funcref that references a
function that will return the amount desired:

b:sh_indent_options['default']  Default amount of indent.

b:sh_indent_options['continuation-line']
                                Amount of indent to add to a continued line.

b:sh_indent_options['case-labels']
                                Amount of indent to add for case labels.
                                (not actually implemented)

b:sh_indent_options['case-statements']
                                Amount of indent to add for case statements.

b:sh_indent_options['case-breaks']
                                Amount of indent to add (or more likely
                                remove) for case breaks.

VERILOG                                                 ft-verilog-indent

General block statements such as if, for, case, always, initial, function,
specify and begin, etc., are indented.  The module block statements (first
level blocks) are not indented by default.  you can turn on the indent with
setting a variable in the .vimrc as follows: 

  let b:verilog_indent_modules = 1

then the module blocks will be indented.  To stop this, remove the variable: 

  :unlet b:verilog_indent_modules

To set the variable only for Verilog file.  The following statements can be
used: 

  au BufReadPost * if exists("b:current_syntax")
  au BufReadPost *   if b:current_syntax == "verilog"
  au BufReadPost *     let b:verilog_indent_modules = 1
  au BufReadPost *   endif
  au BufReadPost * endif

Furthermore, setting the variable b:verilog_indent_width to change the
indenting width (default is 'shiftwidth'): 

  let b:verilog_indent_width = 4
  let b:verilog_indent_width = &sw * 2

In addition, you can turn the verbose mode for debug issue: 

  let b:verilog_indent_verbose = 1

Make sure to do ":set cmdheight=2" first to allow the display of the message.


VHDL                                                    ft-vhdl-indent

Alignment of generic/port mapping statements are performed by default. This
causes the following alignment example: 

  ENTITY sync IS
  PORT (
         clk        : IN  STD_LOGIC;
         reset_n    : IN  STD_LOGIC;
         data_input : IN  STD_LOGIC;
         data_out   : OUT STD_LOGIC
       );
  END ENTITY sync;

To turn this off, add 

  let g:vhdl_indent_genportmap = 0

to the .vimrc file, which causes the previous alignment example to change: 

  ENTITY sync IS
  PORT (
    clk        : IN  STD_LOGIC;
    reset_n    : IN  STD_LOGIC;
    data_input : IN  STD_LOGIC;
    data_out   : OUT STD_LOGIC
  );
  END ENTITY sync;

----------------------------------------

Alignment of right-hand side assignment "<=" statements are performed by
default. This causes the following alignment example: 

  sig_out <= (bus_a(1) AND
             (sig_b OR sig_c)) OR
             (bus_a(0) AND sig_d);

To turn this off, add 

  let g:vhdl_indent_rhsassign = 0

to the .vimrc file, which causes the previous alignment example to change: 

  sig_out <= (bus_a(1) AND
    (sig_b OR sig_c)) OR
    (bus_a(0) AND sig_d);

----------------------------------------

Full-line comments (lines that begin with "--") are indented to be aligned with
the very previous line's comment, PROVIDED that a whitespace follows after
"--".

For example: 

  sig_a <= sig_b; -- start of a comment
                  -- continuation of the comment
                  -- more of the same comment

While in Insert mode, after typing "-- " (note the space " "), hitting CTRL-F
will align the current "-- " with the previous line's "--".

If the very previous line does not contain "--", THEN the full-line comment
will be aligned with the start of the next non-blank line that is NOT a
full-line comment.

Indenting the following code: 

  sig_c <= sig_d; -- comment 0
         -- comment 1
               -- comment 2
    --debug_code:
    --PROCESS(debug_in)
         --BEGIN
            --  FOR i IN 15 DOWNTO 0 LOOP
             --    debug_out(8*i+7 DOWNTO 8*i) <= debug_in(15-i);
            --  END LOOP;
     --END PROCESS debug_code;

      -- comment 3
  sig_e <= sig_f; -- comment 4
           -- comment 5

results in: 

  sig_c <= sig_d; -- comment 0
                  -- comment 1
                  -- comment 2
  --debug_code:
  --PROCESS(debug_in)
  --BEGIN
  --  FOR i IN 15 DOWNTO 0 LOOP
  --    debug_out(8*i+7 DOWNTO 8*i) <= debug_in(15-i);
  --  END LOOP;
  --END PROCESS debug_code;

  -- comment 3
  sig_e <= sig_f; -- comment 4
                  -- comment 5

Notice that "--debug_code:" does not align with "-- comment 2"
because there is no whitespace that follows after "--" in "--debug_code:".

Given the dynamic nature of indenting comments, indenting should be done TWICE.
On the first pass, code will be indented. On the second pass, full-line
comments will be indented according to the correctly indented code.


VIM                                                     ft-vim-indent

For indenting Vim scripts there is one variable that specifies the amount of
indent for a continuation line, a line that starts with a backslash: 

        :let g:vim_indent_cont = &sw * 3

Three times shiftwidth is the default value.


 vim:tw=78:ts=8:ft=help:norl:

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