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Use clap derive macro in all examples. #337

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Oct 28, 2022
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Use clap derive macro in all examples. #337

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refactor: examples/tree_traversals.rs now uses clap derive
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@molpopgen
molpopgen committed Oct 28, 2022
commit 2ea6cf857425c813613cf2cedb18d5a532e9baaa
24 changes: 10 additions & 14 deletions examples/tree_traversals.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
use clap::{Arg, Command};
use clap::Parser;
use tskit::prelude::*;

// "Manual" traversal from samples to root
Expand All @@ -24,20 +24,16 @@ fn preorder_traversal(tree: &tskit::Tree) {
for _ in tree.traverse_nodes(tskit::NodeTraversalOrder::Preorder) {}
}

#[derive(clap::Parser)]
struct Params {
#[clap(short = 't', long = "treefile", value_parser, help = "Tree file name")]
treefile: String,
}

fn main() {
let matches = Command::new("tree_traversals")
.arg(
Arg::new("treefile")
.short('t')
.long("treefile")
.help("Tree file name")
.takes_value(true),
)
.get_matches();

let treefile: String = matches.value_of_t_or_exit("treefile");

let treeseq = tskit::TreeSequence::load(&treefile).unwrap();
let params = Params::parse();

let treeseq = tskit::TreeSequence::load(&params.treefile).unwrap();

let mut tree_iterator = treeseq.tree_iterator(tskit::TreeFlags::default()).unwrap();

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