Create a syntax tree — tree_new • astgrepr

This function takes R code as string and creates the corresponding abstract syntax tree (AST) from which we can query nodes.

Usage

tree_new(txt, file, ignore_tags = "ast-grep-ignore")

Arguments

txt: A character string of length 1 containing the code to parse. If provided, file must not be provided.
file: Path to file containing the code to parse. If provided, txt must not be provided.
ignore_tags: Character vector indicating the tags to ignore. Default is "ast-grep-ignore", meaning that any line that follows # ast-grep-ignore will be ignored in the output of node_*() functions.

Value

An abstract syntax tree containing nodes

Examples

src <- "x <- rnorm(100, mean = 2)
    any(duplicated(y))
    plot(x)
    any(duplicated(x))"

tree_new(src)
#> <pointer: 0x56376ca33ee0>
#> attr(,"class")
#> [1] "SgRoot"
#> attr(,"lines_to_ignore")
#> attr(,"lines_to_ignore")$all_rules
#> numeric(0)
#> 
#> attr(,"has_trailing_new_line")
#> [1] FALSE