95 lines
2.8 KiB
VimL
95 lines
2.8 KiB
VimL
" funcref.vim
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" @License: GPL (see http://www.gnu.org/licenses/gpl.txt)
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" @Last Change: 2010-01-03.
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" @Revision: 0.1.0
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" documentation see doc/funcref.txt
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" usage:
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" funcref#Function("filename#Function")
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" optionally pass arguments:
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" funcref#Function("filename#Function",{'args': [2]})
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" optionally define self:
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" funcref#Function("filename#Function",{'self': object})
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function! funcref#Function(name,...)
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let d = a:0 > 0 ? a:1 : {}
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let d['faked_function_reference'] = a:name
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return d
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endfunction
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" args : same as used for call(f,[args], self)
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" f must be either
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" - a string which can be evaled (use "return 'value'" to return a value)
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" - a Vim function reference created by function('..')
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" - a faked function reference created by funcref#Function(..)
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"
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" the last "self" argument can be overriden by the function reference
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" You can pass arguments in a closure like style
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function! funcref#Call(...)
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let args = copy(a:000)
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" add parameters:
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if (len(args) < 2)
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call add(args, [])
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endif
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let isDict = type(args[0]) == type({})
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" prepend parameters which were passed by faked function reference:
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if isDict && has_key(args[0], 'args')
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let args[1] = args[0]['args']+args[1]
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endif
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" always pass self. this way you can call functions from dictionaries not
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" refering to self
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if (len(args) < 3)
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call add(args, {})
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endif
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" the funcref overrides self:
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if isDict && has_key(args[0], 'self')
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let args[2] = args[0]['self']
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endif
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if type(a:1) == 2
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" funcref: function must have been laoded
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return call(function('call'), args)
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elseif isDict && has_key(args[0], 'faked_function_reference')
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let Fun = args[0]['faked_function_reference']
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if type(Fun) == type('')
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\ && (Fun[:len('return ')-1] == 'return '
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\ || Fun[:len('call ')-1] == 'call '
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\ || Fun[:len('if ')-1] == 'if '
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\ || Fun[:len('let ')-1] == 'let '
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\ || Fun[:len('echo ')-1] == 'echo '
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\ || Fun[:len('exec ')-1] == 'exec '
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\ || Fun[:len('debug ')-1] == 'debug ')
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" it doesn't make sense to list all vim commands here
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" So if you want to execute another action consider using
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" funcref#Function('exec '.string('aw')) or such
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" function is a String, call exec
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let ARGS = args[1]
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let SELF = args[2]
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exec Fun
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else
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" pseudo function, let's load it..
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if type(Fun) == 1
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if !exists('*'.Fun)
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" lazily load function
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let file = substitute(substitute(Fun,'#[^#]*$','',''),'#','/','g')
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exec 'runtime /autoload/'.file.'.vim'
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endif
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let Fun2 = function(Fun)
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else
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let Fun2 = Fun
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endif
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let args[0] = Fun
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return call(function('call'), args)
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endif
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else
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" no function, return the value
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return args[0]
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endif
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endfunction
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