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Get parsed IDs by token

Source: R/ids_with_token.R, R/with_id.R
ids_with_token.Rd

Gets the source IDs (row indices) corresponding to given token.

Usage

ids_with_token(source_expression, value, fun = `==`)

with_id(source_expression, id)

Arguments

source_expression

A list of source expressions, the result of a call to get_source_expressions(), for the desired filename.

value

Character. String corresponding to the token to search for. For example:

  • "SYMBOL"

  • "FUNCTION"

  • "EQ_FORMALS"

  • "$"

  • "("

fun

For additional flexibility, a function to search for in the token column of parsed_content. Typically == or %in%.

id

Integer. The index corresponding to the desired row of parsed_content.

Value

ids_with_token: The indices of the parsed_content data frame entry of the list of source expressions. Indices correspond to the rows where fun evaluates to TRUE for the value in the token column.

with_id: A data frame corresponding to the row(s) specified in id.

Functions

  • with_id(): Return the row of the parsed_content entry of the [get_source_expressions]() object. Typically used in conjunction with ids_with_token to iterate over rows containing desired tokens.

Examples

tmp <- tempfile()
writeLines(c("x <- 1", "y <- x + 1"), tmp)
source_exprs <- get_source_expressions(tmp)
ids_with_token(source_exprs$expressions[[1L]], value = "SYMBOL")
#> [1] 2
with_id(source_exprs$expressions[[1L]], 2L)
#>   line1 col1 line2 col2 id parent  token terminal text
#> 1     1    1     1    1  1      3 SYMBOL     TRUE    x
unlink(tmp)