R: pass a vector of symbols into a function instead of a long argument list -

i'm writing r package calls c code .c() function. need pass on 50 arguments .c(), bloats code , prone error. rather type

output <- .c("my_dynlib", arg2, arg3, arg4, arg5, arg6, ..., arg53) 

i rather have character vector mynames of additional arguments send .c() , like

f <- vectorize(as.symbol, "x") mysymbols <- f(mynames) output <- .c("my_dynlib", mysymbols) 

but isn't quite want because mysymbols list. there way compactly pass collection of arguments function don't want rewrite?

footnote: i'm guessing of suggest passing more complicated arguments .call, .external, or rcpp, that's more overhaul want deal right now.

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edit: if want mynames point slots in s3 or s4 object?

suppose want use symbols refer class slots in data frame.

> y = data.frame(a = 1:4, b = 5:8) > mynames = paste("y@", slotnames(y), sep = "") > mysymbols = lapply(mynames, as.symbol) > str(mysymbols) list of 4  $ : symbol y@.data  $ : symbol y@names  $ : symbol y@row.names  $ : symbol y@.s3class 

i use do.call @josilber said, do.call doesn't recognize symbols

> do.call(print, mysymbols) error in (function (x, ...)  : object 'y@.data' not found 

even though can use symbols manually.

> y@.data [[1]] [1] 1 2 3 4  [[2]] [1] 5 6 7 8  

if have list of objects want pass function, can do.call function. in case, sounds following should work:

do.call(".c", c("my_dynlib", mysymbols))