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\arguments{
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\arguments{
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  \item{x}{a character vector.}
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  \item{x}{a character vector.}
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  \item{delim}{a character vector of length 2 giving the start and end
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  \item{delim}{a character vector of length 2 giving the start and end
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    delimiters.  Currently, both must be single characters.  Future
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    delimiters.  Currently, both must be single characters.  Future
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    versions might allow for arbitrary regular expressions.}
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    versions might allow for arbitrary regular expressions.}
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  \item{syntax}{currently, always the string \code{"Rd"} indicating Rd
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  \item{syntax}{currently, always the string \samp{"Rd"} indicating Rd
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    syntax (i.e., \code{\%} starts a comment extending till the end of
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    syntax (i.e., \samp{\%} starts a comment extending till the end of
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    the line, and \code{\\} escapes).  Future versions might know about
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    the line, and \samp{\\} escapes).  Future versions might know about
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    other syntaxes, perhaps via ``syntax tables'' allowing to flexibly
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    other syntaxes, perhaps via \dQuote{syntax tables} allowing to
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    specify comment, escape, and quote characters.}
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    flexibly specify comment, escape, and quote characters.}
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}
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}
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\value{
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\value{
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  An integer vector of the same length as \code{x} giving the starting
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  An integer vector of the same length as \code{x} giving the starting
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  position of the first match, or \eqn{-1} if there is none, with
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  position of the first match, or \eqn{-1} if there is none, with
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  attribute \code{"match.length"} giving the length of the matched text
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  attribute \code{"match.length"} giving the length of the matched text
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  (or \eqn{-1} for no match).
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  (or \eqn{-1} for no match).
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}
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}
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\seealso{
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\seealso{
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  \code{\link{regexpr}} for ``simple'' pattern matching.
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  \code{\link{regexpr}} for \dQuote{simple} pattern matching.
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}
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}
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\examples{
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\examples{
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x <- c("\value\{foo\}", "function(bar)")
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x <- c("\value\{foo\}", "function(bar)")
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delimMatch(x)
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delimMatch(x)
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delimMatch(x, c("(", ")"))
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delimMatch(x, c("(", ")"))