Build a response rule from a quoted expression

Convert a source label or quoted R expression into a response rule for add_outcome(). Within a quoted expression, & combines requirements, | allows alternative routes, and ! specifies an absence condition. These correspond to all_of(), first_of(), and none_of().

Usage

build_outcome_expr(expr)

Arguments

expr

Accumulator or pool label, symbol, quoted logical expression, or an expression object returned by an outcome helper.

Value

An expression object used inside model specifications.

Examples

build_outcome_expr(quote(A & !B))
#> $kind
#> [1] "and"
#> 
#> $args
#> $args[[1]]
#> $args[[1]]$kind
#> [1] "event"
#> 
#> $args[[1]]$source
#> [1] "A"
#> 
#> 
#> $args[[2]]
#> $args[[2]]$kind
#> [1] "not"
#> 
#> $args[[2]]$arg
#> $args[[2]]$arg$kind
#> [1] "event"
#> 
#> $args[[2]]$arg$source
#> [1] "B"
#> 
#> 
#> 
#>