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Editing: tf.vim

" Vim indent file
" Language:     tf (TinyFugue)
" Maintainer:   Christian J. Robinson <heptite@gmail.com>
" URL:          http://www.vim.org/scripts/script.php?script_id=174
" Last Change:  2017 Feb 25

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

setlocal indentexpr=GetTFIndent()
setlocal indentkeys-=0{,0} indentkeys-=0# indentkeys-=:
setlocal indentkeys+==/endif,=/then,=/else,=/done,0;

" Only define the function once:
if exists("*GetTFIndent")
  finish
endif

function GetTFIndent()
	" Find a non-blank line above the current line:
	let lnum = prevnonblank(v:lnum - 1)

" No indent for the start of the file:
	if lnum == 0
		return 0
	endif

let ind = indent(lnum)
	let line = getline(lnum)

" No indentation if the previous line didn't end with "\":
	" (Could be annoying, but it lets you know if you made a mistake.)
	if line !~ '\\$'
		return 0
	endif

if line =~ '$/def.*\\\|/for.*\(%;\s*$\@\<!\\\)$'
		let ind = ind + shiftwidth()
	elseif line =~ '$/if\|/else\|/then$'
		if line !~ '/endif'
			let ind = ind + shiftwidth()
		endif
	elseif line =~ '/while'
		if line !~ '/done'
			let ind = ind + shiftwidth()
		endif
	endif

let line = getline(v:lnum)

if line =~ '$/else\|/endif\|/then$'
		if line !~ '/if'
			let ind = ind - shiftwidth()
		endif
	elseif line =~ '/done'
		if line !~ '/while'
			let ind = ind - shiftwidth()
		endif
	endif

" Comments at the beginning of a line:
	if line =~ '^\s*;'
		let ind = 0
	endif

return ind

endfunction

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