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//! The arena side of TS-16 (P2-5a; expression payloads P2-5b): the
//! reference tree built with the op family in a live arena - retained
//! `js` payloads parsed through the real load-path parse site
//! ([`JsExpr::parse_in`]), `opaque` and `foreign` payloads allocated by
//! hand - mirrored through [`L2Page::of`] into the committed
//! canonical page. The owned twin of this tree lives in
//! `tests/dump_laws.rs`.
#![expect(clippy::expect_used, reason = "tests assert by panicking")]
use vize_l0::dump::{Dump, Mode as DumpMode};
use vize_l0::{Allocator, Box, Span, Vec as ArenaVec};
use vize_l2::dump::Page as L2Page;
use vize_l2::expr::{ExprRef, ForeignExpr, JsExpr, OpaqueExpr, OpaqueReason};
use vize_l2::op::{
Attribute, BindOp, BindingContract, BindingOp, CommentOp, ComponentOp, DynamicName, ElementOp,
ForBinding, ForOp, IfBranch, IfOp, InterpolationOp, ModelOp, Namespace, OnOp, Op, Region,
SlotOp, TextOp, VueDirectiveOp,
};
/// Canonical text of the reference tree.
const CANONICAL: &str = include_str!("fixtures/reference.folio");
/// Parse a retained `js` payload through the load-path parse site.
fn js<'a>(allocator: &'a Allocator, source: &'a str, start: u32, end: u32) -> ExprRef<'a> {
let expr = JsExpr::parse_in(allocator, source, Span::new(start, end))
.expect("reference-tree js payloads are admitted");
ExprRef::Js(expr)
}
/// Allocate an `opaque` payload.
fn opaque<'a>(
allocator: &'a Allocator,
reason: OpaqueReason,
source: &'a str,
start: u32,
end: u32,
) -> ExprRef<'a> {
ExprRef::Opaque(allocator.alloc(OpaqueExpr {
reason,
source,
span: Span::new(start, end),
}))
}
/// The same reference tree, built in a live arena with the op family.
fn arena_built<'a>(allocator: &'a Allocator) -> ArenaVec<'a, Op<'a>> {
// `read` and `write` share one payload on purpose: `ExprRef` is a
// shared reference, and the mirror must not care.
let model_expr = js(allocator, "draft.note", 29, 39);
let if_op = Op::If(Box::new_in(
IfOp {
branches: ArenaVec::from_iter_in(
[
IfBranch {
condition: Some(js(allocator, "open", 65, 69)),
region: Region {
ops: ArenaVec::from_iter_in(
[
Op::Text(Box::new_in(
TextOp {
content: "a\"b\\c",
span: Span::new(66, 70),
},
&allocator,
)),
Op::Comment(Box::new_in(
CommentOp {
content: "kept",
span: Span::new(70, 74),
},
&allocator,
)),
],
&allocator,
),
},
span: Span::new(61, 75),
},
IfBranch {
condition: None,
region: Region {
ops: ArenaVec::from_iter_in(
[Op::Interpolation(Box::new_in(
InterpolationOp {
expression: opaque(
allocator,
OpaqueReason::NestingRefused,
"((((x))))",
82,
88,
),
span: Span::new(80, 88),
},
&allocator,
))],
&allocator,
),
},
span: Span::new(75, 90),
},
],
&allocator,
),
span: Span::new(61, 90),
},
&allocator,
));
let element = Op::Element(Box::new_in(
ElementOp {
tag: "form",
namespace: Namespace::Html,
attributes: ArenaVec::from_iter_in(
[Attribute {
name: "method",
value: Some("post"),
span: Span::new(5, 20),
}],
&allocator,
),
bindings: ArenaVec::from_iter_in(
[
BindingOp::Model(Box::new_in(
ModelOp {
contract: BindingContract {
read: model_expr,
write: model_expr,
},
argument: None,
attributes: ArenaVec::from_iter_in(
[Attribute {
name: "element-kind",
value: Some("textarea"),
span: Span::new(21, 40),
}],
&allocator,
),
span: Span::new(21, 40),
},
&allocator,
)),
BindingOp::VueDirective(Box::new_in(
VueDirectiveOp {
name: "pin",
argument: Some(DynamicName::Static("top")),
modifiers: ArenaVec::from_iter_in(["lazy", "trim"], &allocator),
value: Some(opaque(
allocator,
OpaqueReason::MultiStatement,
"top++; sync()",
46,
59,
)),
span: Span::new(41, 60),
},
&allocator,
)),
],
&allocator,
),
children: Region {
ops: ArenaVec::from_iter_in([if_op], &allocator),
},
span: Span::new(0, 99),
},
&allocator,
));
let foreign = Op::Interpolation(Box::new_in(
InterpolationOp {
expression: ExprRef::Foreign(allocator.alloc(ForeignExpr {
dialect: "moonbit",
source: "count + 1",
span: Span::new(150, 159),
facts: ArenaVec::new_in(&allocator),
})),
span: Span::new(148, 161),
},
&allocator,
));
let for_op = Op::For(Box::new_in(
ForOp {
binding: ForBinding {
source: opaque(allocator, OpaqueReason::ForValue, "a in b in c", 110, 121),
value: js(allocator, "a", 105, 106),
key: Some(js(allocator, "i", 108, 109)),
index: None,
},
region: Region {
ops: ArenaVec::from_iter_in(
[Op::Slot(Box::new_in(
SlotOp {
name: DynamicName::Dynamic(js(allocator, "kind", 136, 140)),
// The outlet's props surface (P2-9 series 5):
// one static slot prop, one `ui.bind` with a
// modifier, one bare `ui.on` listener.
attributes: ArenaVec::from_iter_in(
[Attribute {
name: "tone",
value: Some("brisk"),
span: Span::new(141, 147),
}],
&allocator,
),
bindings: ArenaVec::from_iter_in(
[
BindingOp::Bind(Box::new_in(
BindOp {
name: Some(DynamicName::Static("chip")),
modifiers: ArenaVec::from_iter_in(
["camel"],
&allocator,
),
value: Some(js(allocator, "chipVal", 149, 156)),
span: Span::new(148, 157),
},
&allocator,
)),
BindingOp::On(Box::new_in(
OnOp {
name: Some(DynamicName::Static("press")),
modifiers: ArenaVec::from_iter_in(["stop"], &allocator),
handler: None,
span: Span::new(158, 160),
},
&allocator,
)),
],
&allocator,
),
fallback: Region {
ops: ArenaVec::from_iter_in([foreign], &allocator),
},
span: Span::new(131, 161),
},
&allocator,
))],
&allocator,
),
},
span: Span::new(100, 161),
},
&allocator,
));
let component = Op::Component(Box::new_in(
ComponentOp {
name: "Chrome",
attributes: ArenaVec::new_in(&allocator),
bindings: ArenaVec::new_in(&allocator),
children: Region {
ops: ArenaVec::new_in(&allocator),
},
span: Span::new(162, 171),
},
&allocator,
));
ArenaVec::from_iter_in([element, for_op, component], &allocator)
}
#[test]
fn an_arena_tree_mirrors_into_the_same_folio() {
let allocator = Allocator::default();
let ops = arena_built(&allocator);
let mirrored = L2Page::of(&ops);
assert_eq!(mirrored.op_count(), 13);
assert_eq!(mirrored.print_to_string(DumpMode::Full).as_str(), CANONICAL);
assert_eq!(
mirrored,
L2Page::parse(CANONICAL).expect("canonical text parses")
);
}