This pairlist constructor uses dynamic dots. Use it to manually create argument lists for calls or parameter lists for functions.
pairlist2(...)<dynamic> Arguments stored in the pairlist. Empty arguments are preserved.
# Unlike `exprs()`, `pairlist2()` evaluates its arguments.
new_function(pairlist2(x = 1, y = 3 * 6), quote(x * y))
new_function(exprs(x = 1, y = 3 * 6), quote(x * y))
# It preserves missing arguments, which is useful for creating
# parameters without defaults:
new_function(pairlist2(x = , y = 3 * 6), quote(x * y))
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