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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -32,6 +32,7 @@ | |
| ^.*\.Rproj$ | ||
| ^\.Rproj\.user$ | ||
| ^\.idea$ | ||
| ^\.libs$ | ||
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| ^.*\.dll$ | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| is.AsIs = function(x) { | ||
| inherits(x, "AsIs") | ||
| } | ||
| rm.AsIs = function(x) { | ||
| cl = oldClass(x) | ||
| oldClass(x) = cl[cl!="AsIs"] | ||
| x | ||
| } | ||
| list2lang = function(x) { | ||
| if (!is.list(x)) | ||
| stop("'x' must be a list") | ||
| if (is.AsIs(x)) | ||
| return(rm.AsIs(x)) | ||
| asis = vapply(x, is.AsIs, FALSE) | ||
| char = vapply(x, is.character, FALSE) | ||
| to.name = !asis & char | ||
| if (any(to.name)) { ## turns "my_name" character scalar into `my_name` symbol, for convenience | ||
| if (any(non.scalar.char <- vapply(x[to.name], length, 0L)!=1L)) { | ||
| stop("Character objects provided in the input are not scalar objects, if you need them as character vector rather than a name, then wrap each into 'I' call: ", | ||
| paste(names(non.scalar.char)[non.scalar.char], collapse=", ")) | ||
| } | ||
| x[to.name] = lapply(x[to.name], as.name) | ||
| } | ||
| if (isTRUE(getOption("datatable.enlist", TRUE))) { ## recursively enlist for nested lists, see note section in substitute2 manual | ||
| islt = vapply(x, is.list, FALSE) | ||
| to.enlist = !asis & islt | ||
| if (any(to.enlist)) { | ||
| x[to.enlist] = lapply(x[to.enlist], enlist) | ||
| } | ||
| } | ||
| if (any(asis)) { | ||
| x[asis] = lapply(x[asis], rm.AsIs) | ||
| } | ||
| x | ||
| } | ||
| enlist = function(x) { | ||
| if (!is.list(x)) | ||
| stop("'x' must be a list") | ||
| if (is.AsIs(x)) | ||
| return(rm.AsIs(x)) | ||
| as.call(c(quote(list), list2lang(x))) | ||
| } | ||
|
|
||
| substitute2 = function(expr, env) { | ||
| if (missing(expr)) | ||
| return(substitute()) | ||
| if (missing(env)) { | ||
| stop("'env' must not be missing") | ||
| } else if (is.null(env)) { | ||
| # null is fine, will be escaped few lines below | ||
| } else if (is.environment(env)) { | ||
| env = as.list(env, all.names=TRUE, sorted=TRUE) | ||
| } else if (!is.list(env)) { | ||
| stop("'env' must be a list or an environment") | ||
| } | ||
| if (!length(env)) { | ||
| return(substitute(expr)) | ||
| } | ||
| env.names = names(env) | ||
| if (is.null(env.names)) { | ||
| stop("'env' argument does not have names") | ||
| } else if (!all(nzchar(env.names))) { | ||
| stop("'env' argument has zero char names") | ||
| } else if (anyNA(env.names)) { | ||
| stop("'env' argument has NA names") | ||
| } else if (anyDuplicated(env.names)) { | ||
| stop("'env' argument has duplicated names") | ||
| } | ||
| # character to name/symbol, and list to list call | ||
| env = list2lang(env) | ||
| # R substitute | ||
| expr.sub = eval(substitute( | ||
| substitute(.expr, env), | ||
| env = list(.expr = substitute(expr)) | ||
| )) | ||
| if (missing(expr.sub)) | ||
| return(substitute()) ## nested emptiness | ||
| # substitute call argument names | ||
| .Call(Csubstitute_call_arg_namesR, expr.sub, env) | ||
| } |
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