back out c76285: 10% failure rate on CRAN

git-svn-id: https://svn.r-project.org/R/trunk@76298 00db46b3-68df-0310-9c12-caf00c1e9a41

src/library/grid/NAMESPACE

@@ -33,8 +33,7 @@ export(
 
        "unit",
        "is.unit",
-       "unit.c", "unit.length", "unit.pmax", "unit.pmin", "unit.psum", "unit.rep",
-
+       "unit.c", "unit.length", "unit.pmax", "unit.pmin", "unit.rep",
        "stringWidth", "stringHeight", "stringAscent", "stringDescent",
        "grobX", "grobY", "grobWidth", "grobHeight",
        "grobAscent", "grobDescent",
@@ -133,6 +132,8 @@ S3method("[", "arrow")
 S3method("[", "gList")
 S3method("[", "gpar")
 S3method("[", "unit")
+S3method("[", "unit.arithmetic")
+S3method("[", "unit.list")
 S3method("[", "vpPath")
 S3method("[<-", "unit")
 S3method("Ops", "unit")
@@ -141,15 +142,15 @@ S3method("as.character", "grob")
 S3method("as.character", "gList")
 S3method("as.character", "path")
 S3method("as.character", "unit")
+S3method("as.character", "unit.arithmetic")
+S3method("as.character", "unit.list")
 S3method("as.character", "viewport")
 S3method("as.character", "vpList")
 S3method("as.character", "vpStack")
 S3method("as.character", "vpTree")
-S3method("as.double", "unit")
-S3method("as.vector", "unit")
-S3method("as.double", "simpleUnit")
-S3method("as.vector", "simpleUnit")
 S3method("format", "unit")
+S3method("format", "unit.arithmetic")
+S3method("format", "unit.list")
 S3method("print", "grob")
 S3method("print", "gList")
 S3method("print", "unit")
@@ -359,6 +360,10 @@ S3method("forceGrob", "default")
 S3method("forceGrob", "grob")
 S3method("forceGrob", "gTree")
 
+S3method("absolute.units", "unit")
+S3method("absolute.units", "unit.list")
+S3method("absolute.units", "unit.arithmetic")
+
 # S3 methods for internal generics that are used in calls to external fns
 S3method("depth", "viewport")
 S3method("depth", "vpList")
@@ -402,9 +407,13 @@ S3method("rep", "unit")
 S3method("rep", "arrow")
 
 # S3 method for generic length (in base)
+S3method("length", "unit")
+S3method("length", "unit.arithmetic")
+S3method("length", "unit.list")
 S3method("length", "arrow")
 
 # S3 method for generic str (in utils)
+S3method("str", "unit.arithmetic")
 S3method("str", "arrow")
 
 S3method("makeContent", "default")