R/with.workbook.R

Defines functions with.workbook

Documented in with.workbook

#############################################################################
#
# XLConnect
# Copyright (C) 2010-2021 Mirai Solutions GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#
#############################################################################

#############################################################################
#
# Evaluate an expression in the context of Excel named regions
# 
# Author: Martin Studer, Mirai Solutions GmbH
#
#############################################################################

with.workbook <- function(data, expr, ...) {
	env <- new.env(parent = parent.frame())
	for(name in getDefinedNames(data, validOnly = TRUE)) {
		tryCatch(assign(make.names(name), readNamedRegion(data, name = name, ...), envir = env),
			error = function(e) {
				warning(e)
			}
		)
	}
	eval(substitute(expr), envir = env)
}

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XLConnect documentation built on Feb. 16, 2023, 5:53 p.m.