Partial fix for PR#16009.  It still fails for UTF-8 strings; see commented example in tests/utf8-regex.R.

git-svn-id: https://svn.r-project.org/R/trunk@66712 00db46b3-68df-0310-9c12-caf00c1e9a41
nextmethod simplifications/optimizations, from Tomas Kalibera.


git-svn-id: https://svn.r-project.org/R/trunk@66713 00db46b3-68df-0310-9c12-caf00c1e9a41
NEWS item for r66712

git-svn-id: https://svn.r-project.org/R/trunk@66714 00db46b3-68df-0310-9c12-caf00c1e9a41
Preparations or adding typed stack support.


git-svn-id: https://svn.r-project.org/R/trunk@66716 00db46b3-68df-0310-9c12-caf00c1e9a41
Added typed stack support.


git-svn-id: https://svn.r-project.org/R/trunk@66717 00db46b3-68df-0310-9c12-caf00c1e9a41
Added compiler support for using new math, subset, and subassign instructions.


git-svn-id: https://svn.r-project.org/R/trunk@66718 00db46b3-68df-0310-9c12-caf00c1e9a41
Enabled use of typed stack.


git-svn-id: https://svn.r-project.org/R/trunk@66719 00db46b3-68df-0310-9c12-caf00c1e9a41
News item for r66718 and r66719.


git-svn-id: https://svn.r-project.org/R/trunk@66720 00db46b3-68df-0310-9c12-caf00c1e9a41