Helper functions for tree-sitter tree selections (internal)

These functions are for packages implementing new parsers based on the ts package. It is very unlikely that you will need to call these functions directly.

Usage

ts_tree_selection(tree, default = TRUE)

ts_tree_selected_nodes(tree, default = TRUE)

Arguments

tree: A ts_tree object as returned by ts_tree_new().
default: Logical, whether to return the default selection if there is no explicit selection, or NULL.

Value

ts_tree_selection() returns a list of selection records.

ts_tree_selected_nodes() returns the ids of the currently selected nodes.

Details

ts_tree_selection() returns the current selection, as a list of selectors.

ts_tree_selected_nodes() returns the ids of the currently selected nodes.

Examples

# Create a parse tree with tsjsonc -------------------------------------
tree <- tsjsonc::ts_parse_jsonc('{"a": 13, "b": [1, 2, 3], "c": "x"}')
tree <- ts_tree_select(tree, "b", -1)
ts_tree_selection(tree)
#> [[1]]
#> [[1]]$selector
#> list()
#> attr(,"class")
#> [1] "ts_tree_selector_default" "ts_tree_selector"        
#> [3] "list"                    
#> 
#> [[1]]$nodes
#> [1] 2
#> 
#> 
#> [[2]]
#> [[2]]$selector
#> [1] "b"
#> 
#> [[2]]$nodes
#> [1] 18
#> 
#> 
#> [[3]]
#> [[3]]$selector
#> [1] -1
#> 
#> [[3]]$nodes
#> [1] 24
#> 
#>