Abstract syntax tree of the expression — CLOSED_FORM$ast • visage

This function returns the abstract syntax tree of the exrpession

Arguments

expr: Language. Any quoted expression.

Value

A list.

Examples


CLOSED_FORM$ast(quote(a + b))
#> [[1]]
#> `+`
#> 
#> [[2]]
#> a
#> 
#> [[3]]
#> b
#> 
CLOSED_FORM$ast(quote(exp(a) + b^2))
#> [[1]]
#> `+`
#> 
#> [[2]]
#> [[2]][[1]]
#> exp
#> 
#> [[2]][[2]]
#> a
#> 
#> 
#> [[3]]
#> [[3]][[1]]
#> `^`
#> 
#> [[3]][[2]]
#> b
#> 
#> [[3]][[3]]
#> [1] 2
#> 
#>