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###########################################################################/**
# @RdocDefault rargs
#
# @title "Gets RSP arguments of an RSP document"
#
# \description{
# @get "title", if any.
# }
#
# @synopsis
#
# \arguments{
# \item{...}{Arguments passed to @see "rcompile".}
# }
#
# \value{
# Returns a @data.frame of class 'RspArguments'.
# }
#
# \details{
# Any RSP preprocessing variable with an 'description' attribute
# is considered to be an RSP argument.
# }
#
# @examples "../incl/rargs.Rex"
#
# @author
#
# \seealso{
# @see "rfile".
# }
#
# @keyword file
# @keyword IO
# @keyword internal
#*/###########################################################################
setMethodS3("rargs", "default", function(...) {
# Parse RSP document
doc <- rcompile(..., until="directives", output=RspDocument())
# Extract RSP preprocessing directives
keep <- unlist(sapply(doc, FUN=inherits, "RspUnparsedDirective"), use.names=FALSE)
doc <- doc[keep]
# Parse RSP directives
for (idx in seq_along(doc)) {
doc[[idx]] <- parseDirective(doc[[idx]])
}
# Extract RSP preprocessing variables
keep <- unlist(sapply(doc, FUN=inherits, "RspVariableDirective"), use.names=FALSE)
doc <- doc[keep]
# Subset by those with 'description' attributes.
keep <- unlist(sapply(doc, FUN=hasAttribute, "description"), use.names=FALSE)
doc <- doc[keep]
args <- lapply(doc, FUN=function(d) {
attrs <- getNameContentDefaultAttributes(d)
type <- as.character(d)
default <- attrs$default
if (is.null(default)) default <- vector(mode=type, length=1L)
default <- as(default, type)
data.frame(
name = attrs$name,
type = type,
default = default,
description = attr(d, "description"),
stringsAsFactors=FALSE
)
})
if (length(args) > 0L) {
args <- Reduce(rbind, args)
} else {
# Default
args <- data.frame(
name = "",
type = "",
default = "",
description = "",
stringsAsFactors=FALSE
)
args <- args[c(),]
}
rownames(args) <- NULL
class(args) <- c("RspArguments", class(args))
args
}) # rargs()
#########################################################################/**
# @set "class=RspArguments"
# @RdocMethod print
#
# @title "Prints RSP arguments"
#
# \description{
# @get "title" returned by @see "rargs".
# }
#
# @synopsis
#
# \arguments{
# \item{...}{Not used.}
# }
#
# \value{
# Returns nothing.
# }
#
# @author
#
# \seealso{
# @see "rargs".
# }
#*/#########################################################################
setMethodS3("print", "RspArguments", function(x, ...) {
s <- NULL
for (kk in seq_len(nrow(x))) {
arg <- x[kk,]
title <- sprintf("'%s' [%s]", arg$name, arg$type)
title <- sprintf("%s:", title)
if (!is.null(arg$default)) {
default <- sprintf(" Default: '%s'", arg$default)
} else {
default <- " Default:"
}
desc <- arg$description
desc <- sprintf(" %s", desc)
s <- c(s, title, default, desc, "")
} # for (kk ...)
s <- paste(s, collapse="\n")
cat(s, "\n", sep="")
})
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