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//! Syntax types.
mod expr;
mod ident;
mod node;
mod span;
mod token;
pub mod visit;
pub use expr::*;
pub use ident::*;
pub use node::*;
pub use span::*;
pub use token::*;
use crate::pretty::{Pretty, Printer};
/// The abstract syntax tree.
pub type Tree = SpanVec<Node>;
impl Pretty for Tree {
fn pretty(&self, p: &mut Printer) {
for node in self {
node.v.pretty(p);
}
}
}
#[cfg(test)]
mod tests {
use crate::parse::parse;
use crate::pretty::pretty;
#[track_caller]
fn test(src: &str, exp: &str) {
let tree = parse(src).output;
let found = pretty(&tree);
if exp != found {
println!("tree: {:#?}", tree);
println!("expected: {}", exp);
println!("found: {}", found);
panic!("test failed");
}
}
#[track_caller]
fn roundtrip(src: &str) {
test(src, src);
}
#[test]
fn test_pretty_print_node() {
// Basic text and markup.
roundtrip("*");
roundtrip("_");
roundtrip(" ");
roundtrip("\\ ");
roundtrip("\n\n");
roundtrip("hi");
// Heading.
roundtrip("# *Ok*");
// Raw.
roundtrip("`lang 1`");
test("`` hi``", "`hi`");
test("`` ` ``", "```");
}
#[test]
fn test_pretty_print_expr() {
// Basic expressions.
roundtrip("{none}");
roundtrip("{hi}");
roundtrip("{true}");
roundtrip("{10}");
roundtrip("{3.14}");
roundtrip("{10pt}");
roundtrip("{14.1deg}");
roundtrip("{20%}");
roundtrip("{#abcdef}");
roundtrip(r#"{"hi"}"#);
test(r#"{"let's go"}"#, r#"{"let\'s go"}"#);
// Arrays.
roundtrip("{()}");
roundtrip("{(1)}");
roundtrip("{(1, 2, 3)}");
// Dictionaries.
roundtrip("{(:)}");
roundtrip("{(key: value)}");
roundtrip("{(a: 1, b: 2)}");
// Templates.
roundtrip("{[]}");
roundtrip("{[*Ok*]}");
roundtrip("{[[f]]}");
// Groups.
roundtrip("{(1)}");
// Blocks.
roundtrip("{}");
roundtrip("{1}");
roundtrip("{ #let x = 1; x += 2; x + 1 }");
// Operators.
roundtrip("{-x}");
roundtrip("{not true}");
roundtrip("{1 + 3}");
// Parenthesized calls.
roundtrip("{v()}");
roundtrip("{v(1)}");
roundtrip("{v(a: 1, b)}");
// Bracket calls.
roundtrip("[v]");
roundtrip("[v 1]");
roundtrip("[v 1, 2][*Ok*]");
roundtrip("[v 1 | f 2]");
roundtrip("{[[v]]}");
test("[v 1, [[f 2]]]", "[v 1 | f 2]");
test("[v 1, 2][[f 3]]", "[v 1, 2 | f 3]");
// Keywords.
roundtrip("#let x = 1 + 2");
roundtrip("#if x [y] #else [z]");
roundtrip("#for x #in y {z}");
roundtrip("#for k, x #in y {z}");
}
}
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