Display a call (or expression) as a tree.

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Description

ast_ takes a quoted expression; ast does the quoting for you.

Usage

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ast_(x, width = getOption("width"))

ast(x)

Arguments

x

Quoted call, list of calls, or expression to display.

width

Display width, defaults to current width as reported by getOption("width").

Examples

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ast(f(x, 1, g(), h(i())))
ast(if (TRUE) 3 else 4)
ast(function(a = 1, b = 2) {a + b + 10})
ast(f(x)(y)(z))

ast_(quote(f(x, 1, g(), h(i()))))
ast_(quote(if (TRUE) 3 else 4))
ast_(expression(1, 2, 3))