fix(javascript)!: preserve property paths and uncertain slot presence

Use one explicit object/array slot model and JSON-pointer property identity across mutation analysis, return projection, and semantic graphs. Require observed presence for discriminants and resolve writes only through retained object or array receivers.

BREAKING CHANGE: projected return fields require explicit presence and semantic object operations carry full property paths.
This commit is contained in:
morluto 2026-10-09 20:03:19 +08:00
parent 63bf91405c
commit 475a0f84da
23 changed files with 831 additions and 560 deletions

View File

@ -106,6 +106,8 @@ it("keeps exact values for empty literals without synthetic application labels",
it.each([
{ version: 3, sources: [""], names: [], mappings: "AAAA" },
{ version: 3, sourceRoot: null, sources: [""], names: [], mappings: "AAAA" },
{ version: 3, sourceRoot: "", sources: [""], names: [], mappings: "AAAA" },
{
version: 3,
sections: [
@ -126,7 +128,9 @@ it.each([
identity.strategy === "source-map-original"
? identity.original_source
: null,
sources: observations.map(({ properties }) => properties.source),
sources: observations.map(
({ source_map_reference }) => source_map_reference?.source_name,
),
}));
expect(originals).toEqual([{ originalSource: "", sources: [""] }]);
});
@ -267,3 +271,75 @@ it("selects an empty context-bridge API with an exact empty seed", async () => {
});
expect(matches.map(({ node_id: nodeId }) => apis.get(nodeId))).toEqual([""]);
});
it("pairs indexed source-map leaves by raw source name and root", async () => {
const map = (value: number) =>
JSON.stringify({
version: 3,
sections: ["one", "two"].map((name, line) => ({
offset: { line, column: 0 },
map: {
version: 3,
sourceRoot: `../${name}`,
sources: ["same.js"],
sourcesContent: [`export const value = ${String(value)};`],
names: [],
mappings: "AAAA",
},
})),
});
const left = await analyzeSource("//# sourceMappingURL=app.js.map", {
"app.js.map": map(1),
});
const right = await analyzeSource("//# sourceMappingURL=app.js.map", {
"app.js.map": map(2),
});
const matching = matchJavaScriptApplicationVersions(
left.graph.nodes,
right.graph.nodes,
);
const originals = matching.pairs.filter(
({ left: node }) => node.kind === "source-module",
);
expect(originals).toHaveLength(2);
for (const pair of originals) {
expect(pair).toMatchObject({
basis: "source-map-identity",
confidence: "high",
});
expect(pair.left.identity).toMatchObject({
original_source: "same.js",
source_root: expect.any(String),
});
if (pair.left.identity.strategy !== "source-map-original")
throw new Error("Expected source identity");
expect(pair.right.identity).toMatchObject({
source_root: pair.left.identity.source_root,
});
}
});
it("reports malformed source roots without manufacturing an original path", async () => {
const output = await analyzeSource("//# sourceMappingURL=app.js.map", {
"app.js.map": JSON.stringify({
version: 3,
sourceRoot: 42,
sources: ["a.js"],
names: [],
mappings: "AAAA",
}),
});
expect(
output.graph.nodes.filter(({ kind }) => kind === "source-module"),
).toEqual([]);
expect(
output.graph.nodes.flatMap(({ observations }) => observations),
).toContainEqual(
expect.objectContaining({
properties: expect.objectContaining({
limitation: "Source map sourceRoot must be a string or null.",
}),
evidence: expect.objectContaining({ state: "unavailable" }),
}),
);
});

View File

@ -147,7 +147,9 @@ it("retains resource-limit reasons at nested object property slots", () => {
expect.objectContaining({
family: "object-flow",
reason: "resource-limit",
detail: expect.stringMatching(/Unknown value at property:value/u),
detail: expect.stringMatching(
/Unknown value at property:\/nested\/value/u,
),
}),
);
});
@ -625,3 +627,242 @@ it("only records node loss when the budget rejects a new identity", () => {
expect(blocked).toBeNull();
expect(state.fileNodesDropped).toBe(true);
});
it("keeps full static property identities distinct through backward provenance", () => {
const graph = graphFor(`
const root = { a: { id: 'left' }, b: { id: 'right' }, 'a.id': 'dotted', '': { 'a/b~c': 'escaped' } };
const left = root.a.id;
const right = root['b']['id'];
const missing = root.id;
const dotted = root['a.id'];
const escaped = root['']['a/b~c'];
`);
const slots = graph.nodes.filter(({ kind }) => kind === "property-slot");
for (const [pointer, literal] of [
["/a/id", "left"],
["/b/id", "right"],
["/a.id", "dotted"],
["//a~1b~0c", "escaped"],
["/id", null],
]) {
const slot = slots.find(
({ properties }) => properties.property_pointer === pointer,
);
if (slot === undefined) throw new Error(`Missing slot ${pointer}`);
expect(slot.properties.presence).toBe(
literal === null ? "absent" : "present",
);
const trace = queryJavaScriptSemanticGraph(graph, {
seed: { kind: "semantic-node", node_id: slot.node_id },
direction: "backward-provenance",
allowed_relations: ["defines"],
});
expect(
trace.nodes
.filter(({ kind }) => kind === "literal")
.map(({ properties }) => properties.value),
).toEqual(literal === null ? [] : [literal]);
const reads = graph.relations.filter(
({ source_node_id, relation }) =>
source_node_id === slot.node_id && relation === "reads-property",
);
expect(reads).toHaveLength(1);
expect(reads[0]?.resolution).toBe(
literal === null ? "candidate" : "resolved",
);
}
});
it("targets nested writes and destructuring without inventing leaf-level root slots", () => {
const graph = graphFor(`
const root = { left: { id: 'before' }, right: { id: 'untouched' } };
root.left.id = produce();
const { right: { id: selected } } = root;
const [first, missing] = [1, , 3];
`);
const rootSlots = graph.nodes.filter(
({ kind, properties }) =>
kind === "property-slot" && properties.name === "id",
);
expect(
rootSlots.map(({ properties }) => properties.property_pointer).sort(),
).toEqual(["/left/id", "/right/id"]);
const left = rootSlots.find(
({ properties }) => properties.property_pointer === "/left/id",
);
const right = rootSlots.find(
({ properties }) => properties.property_pointer === "/right/id",
);
expect(left?.properties.presence).toBe("unknown-coverage");
const write = graph.nodes.find(
({ kind, properties }) =>
kind === "expression" && properties.operation_kind === "write",
);
expect(graph.relations).toContainEqual(
expect.objectContaining({
source_node_id: write?.node_id,
target_node_id: left?.node_id,
relation: "writes-property",
resolution: "resolved",
}),
);
const selected = graph.nodes.find(
({ kind, label }) => kind === "binding" && label === "selected",
);
expect(graph.relations).toContainEqual(
expect.objectContaining({
source_node_id: right?.node_id,
target_node_id: selected?.node_id,
relation: "destructures",
resolution: "resolved",
}),
);
});
it("keeps dynamic intermediate receivers unresolved instead of selecting a static leaf", () => {
const graph = graphFor(`
const root = { id: 'root', a: { id: 'nested' } };
const selected = root[key].id;
`);
expect(
graph.relations.filter(({ relation }) => relation === "reads-property"),
).toEqual([]);
expect(graph.unknowns).toContainEqual(
expect.objectContaining({
family: "object-flow",
relation_kinds: ["reads-property"],
}),
);
const selected = graph.nodes.find(
({ kind, label }) => kind === "binding" && label === "selected",
);
if (selected === undefined) throw new Error("Missing selected binding");
const trace = queryJavaScriptSemanticGraph(graph, {
seed: { kind: "semantic-node", node_id: selected.node_id },
direction: "backward-provenance",
allowed_relations: ["defines"],
});
expect(trace.nodes.filter(({ kind }) => kind === "literal")).toEqual([]);
});
it.each([
{
initializer: "{}",
path: "missing.id",
pointer: "/missing/id",
resolved: false,
},
{
initializer: "{ a: null }",
path: "a.id",
pointer: "/a/id",
resolved: false,
},
{ initializer: "{ a: 1 }", path: "a.id", pointer: "/a/id", resolved: false },
{ initializer: "{ a: {} }", path: "a.id", pointer: "/a/id", resolved: true },
{ initializer: "{ a: [] }", path: "a[0]", pointer: "/a/0", resolved: true },
])(
"admits a write only through a retained container receiver: $initializer.$path",
({ initializer, path, pointer, resolved }) => {
const graph = graphFor(
`const root = ${initializer}; root.${path} = produce();`,
);
const write = graph.nodes.find(
({ kind, properties }) =>
kind === "expression" && properties.operation_kind === "write",
);
const slot = graph.nodes.find(
({ kind, properties }) =>
kind === "property-slot" && properties.property_pointer === pointer,
);
if (write === undefined || slot === undefined)
throw new Error("Expected write and target slot");
expect(graph.relations).toContainEqual(
expect.objectContaining({
source_node_id: write.node_id,
target_node_id: slot.node_id,
relation: "writes-property",
resolution: resolved ? "resolved" : "candidate",
}),
);
const trace = queryJavaScriptSemanticGraph(graph, {
seed: { kind: "semantic-node", node_id: write.node_id },
direction: "forward-influence",
allowed_relations: ["writes-property"],
});
expect(trace.nodes.some(({ node_id }) => node_id === slot.node_id)).toBe(
resolved,
);
if (!resolved)
expect(graph.unknowns).toContainEqual(
expect.objectContaining({
node_id: slot.node_id,
relation_kinds: ["writes-property"],
detail: expect.stringContaining(
"receiver is unresolved or not a retained container",
),
}),
);
},
);
it("retains array length presence without inventing an exact length", () => {
const graph = graphFor("const root = [, 1]; const length = root.length;");
const slot = graph.nodes.find(
({ kind, properties }) =>
kind === "property-slot" && properties.property_pointer === "/length",
);
expect(slot?.properties).toMatchObject({
name: "length",
presence: "present",
value_status: "unknown",
});
const trace = queryJavaScriptSemanticGraph(graph, {
seed: { kind: "property", name: "length" },
direction: "forward-influence",
allowed_relations: ["reads-property"],
});
expect(trace.seed_node_ids).toEqual([slot?.node_id]);
expect(trace.relations).toContainEqual(
expect.objectContaining({
source_node_id: slot?.node_id,
relation: "reads-property",
resolution: "resolved",
}),
);
expect(
graph.relations.some(
({ target_node_id, relation }) =>
target_node_id === slot?.node_id && relation === "defines",
),
).toBe(false);
});
it.each(["{}", "unknownRoot", "{ a: null }"])(
"preserves the requested deep leaf name after a blocked prefix: %s",
(initializer) => {
const graph = graphFor(
`const root = ${initializer}; const selected = root.a.b.c;`,
);
const slot = graph.nodes.find(
({ kind, properties }) =>
kind === "property-slot" && properties.property_pointer === "/a/b/c",
);
expect(slot).toMatchObject({
label: "c",
properties: {
name: "c",
property_path: ["a", "b", "c"],
presence: "unknown-coverage",
value_status: "unknown",
},
});
const trace = queryJavaScriptSemanticGraph(graph, {
seed: { kind: "property", name: "c" },
direction: "backward-provenance",
allowed_relations: ["defines"],
});
expect(trace.seed_node_ids).toEqual([slot?.node_id]);
expect(trace.nodes.filter(({ kind }) => kind === "literal")).toEqual([]);
},
);

View File

@ -1,3 +1,12 @@
import {
semanticSlotAtPath,
semanticContainer,
semanticPropertyPointer,
} from "../../domain/javascript/javascriptSemanticSlots.js";
import type {
JavaScriptSemanticSlotPresence,
JavaScriptSemanticValue,
} from "../../domain/javascript/javascriptSemanticValueTypes.js";
import { createJavaScriptSemanticGraphUnknown } from "../../domain/javascript/javascriptSemanticGraph.js";
import type { JavaScriptSemanticGraphNode } from "../../domain/javascript/javascriptSemanticGraph.js";
import type { JavaScriptSemanticObjectOperation } from "../../domain/javascript/javascriptSemanticIr.js";
@ -14,56 +23,115 @@ import { semanticPropertySlot } from "./JavaScriptSemanticGraphValueProjection.j
export const projectSemanticObjects = (
context: SemanticFlowProjectionContext,
): void => {
const values = new Map(
context.ir.bindings.map((binding) => [binding.bindingId, binding.value]),
);
for (const operation of context.ir.objectOperations) {
const occurrence = addObjectOccurrence(context, operation);
const slot =
operation.objectBindingId === null || operation.propertyName === null
? null
: semanticPropertySlot(
context,
operation.objectBindingId,
operation.propertyName,
);
if (operation.kind === "read")
addSemanticGraphRelation(context.state, {
source: slot,
target: occurrence,
relation: "reads-property",
resolution:
operation.resolution === "complete" ? "resolved" : "candidate",
});
else if (operation.kind === "write")
addSemanticGraphRelation(context.state, {
source: occurrence,
target: slot,
relation: "writes-property",
resolution:
operation.resolution === "complete" ? "resolved" : "candidate",
});
else if (operation.kind === "destructure")
addSemanticGraphRelation(context.state, {
source: slot,
const target = objectTarget(context, values, operation);
const ends = objectRelationEnds(context, operation, occurrence, target);
const resolved =
operation.resolution === "complete" &&
(operation.kind === "write"
? target.receiverResolved
: target.presence === "present");
addSemanticGraphRelation(context.state, {
...ends,
relation: OBJECT_RELATIONS[operation.kind],
resolution: resolved ? "resolved" : "candidate",
});
if (!resolved)
addObjectUnknown(context, operation, target.slot ?? occurrence, target);
}
};
const OBJECT_RELATIONS = {
read: "reads-property",
write: "writes-property",
destructure: "destructures",
spread: "spreads",
} as const;
interface ObjectTarget {
readonly objectNode: JavaScriptSemanticGraphNode | null | undefined;
readonly slot: JavaScriptSemanticGraphNode | null;
readonly presence: JavaScriptSemanticSlotPresence;
readonly receiverResolved: boolean;
}
const objectTarget = (
context: SemanticFlowProjectionContext,
values: ReadonlyMap<string, JavaScriptSemanticValue>,
operation: JavaScriptSemanticObjectOperation,
): ObjectTarget => {
const binding =
operation.objectBindingId === null
? undefined
: context.bindingNodes.get(operation.objectBindingId);
const value =
operation.objectBindingId === null
? undefined
: values.get(operation.objectBindingId);
if (
operation.objectBindingId === null ||
operation.propertyPath === null ||
value === undefined
)
return {
objectNode: binding,
slot: null,
presence: "unknown-coverage",
receiverResolved: false,
};
const fact = semanticSlotAtPath(value, operation.propertyPath);
if (operation.propertyPath.length === 0)
return {
objectNode: binding,
slot: null,
presence: fact.presence,
receiverResolved: semanticContainer(value) !== null,
};
const slot = semanticPropertySlot(
context,
operation.objectBindingId,
operation.propertyPath,
fact,
);
const receiver = semanticSlotAtPath(
value,
operation.propertyPath.slice(0, -1),
);
return {
objectNode: slot,
slot,
presence: fact.presence,
receiverResolved:
receiver.presence === "present" &&
semanticContainer(receiver.value) !== null,
};
};
const objectRelationEnds = (
context: SemanticFlowProjectionContext,
operation: JavaScriptSemanticObjectOperation,
occurrence: JavaScriptSemanticGraphNode | null,
target: ObjectTarget,
) => {
switch (operation.kind) {
case "read":
return { source: target.slot, target: occurrence };
case "write":
return { source: occurrence, target: target.slot };
case "destructure":
return {
source: target.slot,
target:
operation.targetBindingId === null
? undefined
: context.bindingNodes.get(operation.targetBindingId),
relation: "destructures",
resolution:
operation.resolution === "complete" ? "resolved" : "candidate",
});
else
addSemanticGraphRelation(context.state, {
source:
operation.objectBindingId === null
? undefined
: context.bindingNodes.get(operation.objectBindingId),
target: occurrence,
relation: "spreads",
resolution:
operation.resolution === "complete" ? "resolved" : "candidate",
});
if (operation.resolution !== "complete")
addObjectUnknown(context, operation, slot ?? occurrence);
};
case "spread":
return { source: target.objectNode, target: occurrence };
}
};
@ -76,9 +144,9 @@ const addObjectOccurrence = (
roleKey: operation.objectOperationId,
location: operation.location,
label:
operation.propertyName === null
operation.propertyPath === null
? operation.kind
: `${operation.kind}:${operation.propertyName}`,
: `${operation.kind}:${semanticPropertyPointer(operation.propertyPath)}`,
functionNodeId:
operation.ownerCallableId === null
? null
@ -86,7 +154,8 @@ const addObjectOccurrence = (
null),
properties: {
operation_kind: operation.kind,
property_name: operation.propertyName,
property_path:
operation.propertyPath === null ? null : [...operation.propertyPath],
},
});
@ -94,15 +163,9 @@ const addObjectUnknown = (
context: SemanticFlowProjectionContext,
operation: JavaScriptSemanticObjectOperation,
node: JavaScriptSemanticGraphNode | null,
target: Pick<ObjectTarget, "presence" | "receiverResolved">,
): void => {
const relation =
operation.kind === "read"
? "reads-property"
: operation.kind === "write"
? "writes-property"
: operation.kind === "spread"
? "spreads"
: "destructures";
const relation = OBJECT_RELATIONS[operation.kind];
addSemanticGraphUnknown(
context.state,
createJavaScriptSemanticGraphUnknown({
@ -110,7 +173,7 @@ const addObjectUnknown = (
family: "object-flow",
relation_kinds: [relation],
reason: "ambiguous-target",
detail: `Static ${operation.kind} object identity is partial.`,
detail: `Static ${operation.kind} property ${operation.propertyPath === null ? "path is unresolved" : semanticPropertyPointer(operation.propertyPath)} has ${target.presence} presence; its receiver is ${target.receiverResolved ? "a retained container" : "unresolved or not a retained container"}; object identity is ${operation.resolution}.`,
candidate_node_ids: [],
evidence: unknownSemanticEvidence(context.file, operation.location),
}),

View File

@ -1,259 +0,0 @@
import { expect, it } from "vitest";
import { compareCodePoints } from "../../domain/canonicalOrdering.js";
import type { JavaScriptArtifactFile } from "../../domain/javascript/javascriptArtifactFiles.js";
import { analyzeJavaScriptSemantics } from "../../domain/javascript/javascriptSemanticAnalysis.js";
import type { JavaScriptSemanticGraphNode } from "../../domain/javascript/javascriptSemanticGraph.js";
import type { JavaScriptSemanticIr } from "../../domain/javascript/javascriptSemanticIr.js";
import type { JavaScriptSourceRange } from "../../domain/javascript/javascriptStaticAnalysisTypes.js";
import {
constructSemanticGraphNode,
createSemanticGraphProjectionState,
} from "./JavaScriptSemanticGraphConstruction.js";
import {
createSemanticCallableOwnerLookup,
createSemanticNodeRangeLookup,
createSemanticCallSiteLookup,
} from "./JavaScriptSemanticGraphProjection.js";
import { sourceRangesEqual } from "../../domain/javascript/javascriptStaticAnalysisHelpers.js";
const fixtureFile: JavaScriptArtifactFile = {
path: "app.js",
container_sha256: "a".repeat(64),
sha256: "b".repeat(64),
bytes: 0,
inventory_artifact_id: "fixture-app",
kind: "javascript",
unpacked: false,
text: { included: true, value: "" },
};
const nodesFor = (ir: JavaScriptSemanticIr) => {
const state = createSemanticGraphProjectionState({ nodes: [] });
return new Map(
ir.callables.map((callable) => [
callable.callableId,
constructSemanticGraphNode(
fixtureFile,
{
kind: "function",
roleKey: callable.callableId,
label: callable.name,
location: callable.location,
functionNodeId: null,
},
state,
),
]),
);
};
// Reference behavior before the optimization, including stable ties and
// fallback when the most deeply nested callable has no retained graph node.
const previousOwner = (
location: JavaScriptSourceRange | null,
ir: JavaScriptSemanticIr,
nodes: ReadonlyMap<string, JavaScriptSemanticGraphNode>,
) => {
if (location === null) return undefined;
const compare = (
left: JavaScriptSourceRange["start"],
right: JavaScriptSourceRange["start"],
) => left.line - right.line || left.column - right.column;
const key = (range: JavaScriptSourceRange) =>
`${String(range.start.line).padStart(12, "0")}:${String(range.start.column).padStart(12, "0")}`;
return ir.callables
.filter(
(callable) =>
compare(callable.location.start, location.start) <= 0 &&
compare(callable.location.end, location.end) >= 0,
)
.sort((left, right) =>
compareCodePoints(key(right.location), key(left.location)),
)
.map((callable) => nodes.get(callable.callableId))
.find((node) => node !== undefined);
};
const rangesFor = (ir: JavaScriptSemanticIr) => [
null,
...ir.callables.map((callable) => callable.location),
...ir.bindings.flatMap((binding) =>
binding.definitions.map((definition) => definition.location),
),
...ir.references.map((reference) => reference.location),
{ start: { line: 999, column: 0 }, end: { line: 999, column: 1 } },
];
it("matches the prior owner selection across nested functions, arrows and methods", () => {
const ir = analyzeJavaScriptSemantics(`
const outside = 1;
function outer(parameter) {
function inner(value) { return value + parameter; }
const callback = argument => inner(argument);
return callback(outside);
}
class Example { method(value) { return () => outer(value); } }
`);
const nodes = nodesFor(ir);
const lookup = createSemanticCallableOwnerLookup(ir, nodes);
for (const range of rangesFor(ir))
expect(lookup(range)).toBe(previousOwner(range, ir, nodes));
});
it("reads retained node membership at query time and keeps file indexes independent", () => {
const ir = analyzeJavaScriptSemantics(
"function outer() { function inner() { return 1; } return inner(); }",
);
const inner = ir.callables.find((callable) => callable.name === "inner");
if (inner === undefined) throw new Error("Missing inner fixture callable");
const nodes = nodesFor(ir);
const otherNodes = nodesFor(ir);
const lookup = createSemanticCallableOwnerLookup(ir, nodes);
const otherLookup = createSemanticCallableOwnerLookup(ir, otherNodes);
const before = lookup(inner.location);
expect(before?.label).toBe("inner");
nodes.delete(inner.callableId);
expect(lookup(inner.location)?.label).toBe("outer");
expect(otherLookup(inner.location)?.label).toBe("inner");
if (before === undefined) throw new Error("Missing retained fixture node");
nodes.set(inner.callableId, before);
expect(lookup(inner.location)).toBe(before);
});
it("preserves stable ties and non-nested overlapping ranges", () => {
const original = analyzeJavaScriptSemantics(
"function first() { return 1; } function second() { return 2; } function third() { return 3; }",
);
const range = (start: number, end: number): JavaScriptSourceRange => ({
start: { line: 1, column: start },
end: { line: 1, column: end },
});
const ir = {
...original,
callables: original.callables.map((callable, index) => ({
...callable,
location: index === 0 ? range(0, 90) : range(20, index === 1 ? 60 : 80),
})),
};
const nodes = nodesFor(ir);
const lookup = createSemanticCallableOwnerLookup(ir, nodes);
for (const query of [
range(25, 30),
range(25, 70),
range(0, 80),
range(80, 90),
range(91, 92),
])
expect(lookup(query)).toBe(previousOwner(query, ir, nodes));
});
it("matches the prior result across a compiled-style collection of sibling callables", () => {
const ir = analyzeJavaScriptSemantics(
Array.from(
{ length: 300 },
(_, index) =>
`function f${String(index)}(value) { return value + ${String(index)}; }`,
).join(""),
);
const nodes = nodesFor(ir);
const lookup = createSemanticCallableOwnerLookup(ir, nodes);
for (const range of rangesFor(ir))
expect(lookup(range)).toBe(previousOwner(range, ir, nodes));
});
it("returns contained nodes in original order, including repeated and overlapping entries", () => {
const ir = analyzeJavaScriptSemantics(`
function outer(value) { function inner() { return value; } return inner(); }
const sibling = () => outer(1);
`);
const nodes = [...nodesFor(ir).values()].reverse();
const repeated = nodes[0];
if (repeated === undefined) throw new Error("Missing range fixture node");
nodes.push(
repeated,
constructSemanticGraphNode(
fixtureFile,
{
kind: "module",
roleKey: "module",
location: null,
label: "module",
functionNodeId: null,
},
createSemanticGraphProjectionState({ nodes: [] }),
),
);
const lookup = createSemanticNodeRangeLookup(nodes);
const compare = (
left: JavaScriptSourceRange["start"],
right: JavaScriptSourceRange["start"],
) => left.line - right.line || left.column - right.column;
for (const range of rangesFor(ir)) {
if (range === null) continue;
const expected = nodes.filter(
({ identity }) =>
identity.source_range !== null &&
compare(range.start, identity.source_range.start) <= 0 &&
compare(range.end, identity.source_range.end) >= 0,
);
expect(lookup(range)).toEqual(expected);
}
expect(
createSemanticNodeRangeLookup([])(
repeated.identity.source_range ?? {
start: { line: 1, column: 0 },
end: { line: 1, column: 1 },
},
),
).toEqual([]);
});
it("keeps first-call matching and current retained membership for exact locations", () => {
const original = analyzeJavaScriptSemantics(
"function target(value) { return value; } target(1); target(2);",
);
const first = original.callSites[0];
const node = [...nodesFor(original).values()][0];
if (first === undefined || node === undefined)
throw new Error("Missing call fixture");
const duplicate = { ...first, callSiteId: `${first.callSiteId}:duplicate` };
const ir = {
...original,
callSites: [first, duplicate, ...original.callSites.slice(1)],
};
const nodes = new Map(
ir.callSites.map((call) => [
call.callSiteId,
constructSemanticGraphNode(
fixtureFile,
{
kind: "call-site",
roleKey: call.callSiteId,
location: call.location,
label: call.callSiteId,
functionNodeId: null,
},
createSemanticGraphProjectionState({ nodes: [] }),
),
]),
);
const lookup = createSemanticCallSiteLookup(ir, nodes);
const previous = (range: JavaScriptSourceRange) => {
const call = ir.callSites.find((candidate) =>
sourceRangesEqual(candidate.location, range),
);
return call === undefined ? undefined : nodes.get(call.callSiteId);
};
for (const call of ir.callSites)
expect(lookup(call.location)).toBe(previous(call.location));
nodes.delete(first.callSiteId);
expect(lookup(first.location)).toBeUndefined();
expect(nodes.has(duplicate.callSiteId)).toBe(true);
nodes.set(first.callSiteId, node);
expect(lookup(first.location)).toBe(node);
expect(
lookup({ start: { line: 99, column: 0 }, end: { line: 99, column: 1 } }),
).toBeUndefined();
});

View File

@ -1,4 +1,8 @@
import type { JsonValue } from "../../domain/jsonValue.js";
import {
semanticContainer,
semanticPropertyPointer,
type JavaScriptSemanticSlot,
} from "../../domain/javascript/javascriptSemanticSlots.js";
import type {
JavaScriptSemanticBinding,
JavaScriptSemanticValue,
@ -24,7 +28,7 @@ export const projectSemanticValues = (
binding,
value: binding.value,
target: bindingNode,
role: "binding",
path: [],
});
}
};
@ -34,11 +38,13 @@ interface ValueProjectionInput {
readonly binding: JavaScriptSemanticBinding;
readonly value: JavaScriptSemanticValue;
readonly target: ReturnType<typeof semanticPropertySlot>;
readonly role: string;
readonly path: readonly string[];
}
const projectValue = (input: ValueProjectionInput): void => {
const { context, binding, value, target, role } = input;
const { context, binding, value, target, path } = input;
const role =
path.length === 0 ? "binding" : `property:${semanticPropertyPointer(path)}`;
if (target === null) return;
if (value.status === "literal") {
const literal = addLiteralNode(context, binding, value.value, role);
@ -58,31 +64,33 @@ const projectValue = (input: ValueProjectionInput): void => {
resolution: "candidate",
});
}
else if (value.status === "object")
for (const property of value.properties) {
else if (value.status === "object" || value.status === "array") {
const container = semanticContainer(value);
for (const property of container.slots) {
const propertyPath = [...path, property.name];
const slot = semanticPropertySlot(
context,
binding.bindingId,
property.name,
propertyPath,
property,
);
if (property.presence === "absent") continue;
addSemanticGraphRelation(context.state, {
source: target,
target: slot,
relation: "writes-property",
resolution:
value.unknownProperties || property.presence === "unknown-coverage"
? "candidate"
: "resolved",
});
projectValue({
context,
binding,
value: property.value,
target: slot,
role: `property:${property.name}`,
resolution: property.presence === "present" ? "resolved" : "candidate",
});
if (property.presence === "present")
projectValue({
context,
binding,
value: property.value,
target: slot,
path: propertyPath,
});
}
else if (value.status === "unknown" && value.resourceLimit !== undefined) {
} else if (value.status === "unknown" && value.resourceLimit !== undefined) {
const location = binding.definitions[0]?.location ?? null;
const evidence = observedSemanticEvidence(context.file, location);
const isPropertyValue = role.startsWith("property:");
@ -123,21 +131,27 @@ const addLiteralNode = (
properties: { value },
});
/** Create one canonical property slot for a binding/property identity. */
/** Create one canonical slot for a root binding and exact static property path. */
export const semanticPropertySlot = (
context: SemanticFlowProjectionContext,
objectBindingId: string,
name: string,
path: readonly string[],
fact: JavaScriptSemanticSlot,
) =>
retainSemanticGraphNode(context.state, context.file, {
kind: "property-slot",
roleKey: `property:${objectBindingId}:${name}`,
roleKey: `property:${JSON.stringify([objectBindingId, path])}`,
location: null,
label: name,
label: fact.name,
functionNodeId:
context.bindingNodes.get(objectBindingId)?.function_node_id ?? null,
properties: {
name,
name: fact.name,
property_path: [...path],
property_pointer: semanticPropertyPointer(path),
object_binding_id: objectBindingId,
} satisfies Readonly<Record<string, JsonValue>>,
presence: fact.presence,
value_status: fact.value.status,
value_coverage: semanticContainer(fact.value)?.coverage ?? null,
},
});

View File

@ -71,6 +71,7 @@ it("parses projected fields into literal, union, or unknown values", () => {
projectedExportReturnShapesSchema.safeParse(
projectionWithField({
path: "/kind",
presence: "present",
state: "unknown",
value: "invented",
reason: "Dynamic property",
@ -81,6 +82,7 @@ it("parses projected fields into literal, union, or unknown values", () => {
projectedExportReturnShapesSchema.safeParse(
projectionWithField({
path: "/kind",
presence: "present",
state: "union",
value: ["success", "failure"],
reason: null,
@ -88,3 +90,16 @@ it("parses projected fields into literal, union, or unknown values", () => {
).success,
).toBe(true);
});
it("rejects return fields that omit slot presence", () => {
expect(
projectedExportReturnShapesSchema.safeParse(
projectionWithField({
path: "/kind",
state: "literal",
value: "result",
reason: null,
}),
).success,
).toBe(false);
});

View File

@ -75,7 +75,7 @@ export const compareJavaScriptExportShapesInputSchema = z
const projectedReturnFieldShape = {
path: jsonPointerSchema,
presence: z.enum(["present", "absent", "unknown-coverage"]).optional(),
presence: z.enum(["present", "absent", "unknown-coverage"]),
};
const projectedReturnFieldSchema = z.discriminatedUnion("state", [
z.strictObject({

View File

@ -10,9 +10,6 @@ import {
import { compareCodePoints } from "../canonicalOrdering.js";
type Shape = ProjectedExportReturnShapes["static_return_shapes"][number];
type Field = Shape["fields"][number];
type NormalizedField = Field & { presence: NonNullable<Field["presence"]> };
type NormalizedShape = Omit<Shape, "fields"> & { fields: NormalizedField[] };
type SelectorResult = JavaScriptExportShapeComparisonResult["left"];
type SelectorBase = Omit<SelectorResult, "status" | "selected_node_id">;
type ReturnShapeSelection =
@ -58,7 +55,7 @@ export type SelectedJavaScriptExport =
/** Complete return-shape inventory retained from an authenticated projection. */
export interface RetainedJavaScriptExportShapes {
readonly shapes: readonly NormalizedShape[];
readonly shapes: readonly Shape[];
readonly omitted: number;
}
@ -129,24 +126,13 @@ export const selectJavaScriptExport = (
};
};
/** Retain every variant and normalize legacy presence on comparison-owned copies. */
/** Retain every authenticated variant with its explicit slot presence. */
export const retainJavaScriptExportShapes = (
selection: SelectedJavaScriptExport,
): RetainedJavaScriptExportShapes => {
const shapes = (
selection.projection?.static_return_shapes ?? []
).map<NormalizedShape>((shape) => ({
...shape,
fields: shape.fields.map<NormalizedField>((field) => ({
...field,
// Legacy unknown fields did not distinguish values from uncertain slots.
presence:
field.presence ??
(field.state === "unknown" ? "unknown-coverage" : "present"),
})),
}));
return { shapes, omitted: 0 };
};
): RetainedJavaScriptExportShapes => ({
shapes: selection.projection?.static_return_shapes ?? [],
omitted: 0,
});
const selectorBase = (
side: JavaScriptExportShapeSideInput,

View File

@ -17,21 +17,21 @@ describe("JavaScript semantic analysis: dataflow 1", () => {
`);
expect(
ir.objectOperations.map(({ kind, propertyName, resolution }) => ({
ir.objectOperations.map(({ kind, propertyPath, resolution }) => ({
kind,
propertyName,
propertyPath,
resolution,
})),
).toEqual(
expect.arrayContaining([
{
kind: "destructure",
propertyName: "token",
propertyPath: ["token"],
resolution: "complete",
},
{ kind: "spread", propertyName: null, resolution: "complete" },
{ kind: "write", propertyName: "count", resolution: "complete" },
{ kind: "read", propertyName: "token", resolution: "complete" },
{ kind: "spread", propertyPath: [], resolution: "complete" },
{ kind: "write", propertyPath: ["count"], resolution: "complete" },
{ kind: "read", propertyPath: ["token"], resolution: "complete" },
]),
);
});
@ -50,11 +50,11 @@ describe("JavaScript semantic analysis: dataflow 1", () => {
({ kind }) => kind === "destructure",
);
expect(destructures.map(({ propertyName }) => propertyName)).toEqual([
"token",
"token",
"token",
"1",
expect(destructures.map(({ propertyPath }) => propertyPath)).toEqual([
["token"],
["token"],
["token"],
["1"],
]);
expect(
destructures.every(({ resolution }) => resolution === "complete"),
@ -127,10 +127,19 @@ describe("JavaScript semantic analysis: dataflow 1", () => {
unknownProperties: false,
omittedProperties: 0,
properties: expect.arrayContaining([
{ name: "depth", value: { status: "literal", value: 1 } },
{ name: "type", value: { status: "literal", value: "heading" } },
{
name: "depth",
presence: "present",
value: { status: "literal", value: 1 },
},
{
name: "type",
presence: "present",
value: { status: "literal", value: "heading" },
},
{
name: "text",
presence: "present",
value: {
status: "unknown",
reason: "Unsupported CallExpression value.",

View File

@ -62,7 +62,11 @@ it("invalidates a deep mutation while retaining unrelated literal properties", (
expect(onlyBinding(ir, "root").value).toEqual({
status: "object",
properties: [
{ name: "untouched", value: { status: "literal", value: "retained" } },
{
name: "untouched",
presence: "present",
value: { status: "literal", value: "retained" },
},
{
name: "next",
presence: "unknown-coverage",

View File

@ -93,6 +93,9 @@ const unchangedProperties = [
'const source = { nested: { token: "TOKEN", count: 1 } }; const { nested } = source; nested.count = 2; return source.nested.token;',
'const child = { token: "TOKEN", count: 1 }; const source = { child }; source.child.count = 2; return child.token;',
'const source = ["TOKEN", 1]; source[1] = 2; return source[0];',
'const source = ["TOKEN"]; source.extra = 2; return source[0];',
'const source = ["TOKEN"]; source["01"] = 2; return source[0];',
'const source = ["TOKEN"]; source[1000000000] = 2; return source[0];',
'const child = { token: "TOKEN", count: 1 }; const source = [child]; source[0].count = 2; return child.token;',
'const source = { token: "TOKEN" }; source.added = 2; return source.token;',
'const source = { token: "TOKEN", count: 1, other: 1 }; source.count = 2; source.other = 2; return source.token;',

View File

@ -144,7 +144,11 @@ describe("JavaScript semantic analysis: rejection 1", () => {
expect(recovered.returnSites[0]?.value).toMatchObject({
status: "object",
properties: expect.arrayContaining([
{ name: "type", value: { status: "literal", value: "item" } },
{
name: "type",
presence: "present",
value: { status: "literal", value: "item" },
},
expect.objectContaining({
name: "text",
value: expect.objectContaining({ status: "unknown" }),

View File

@ -380,7 +380,7 @@ export interface JavaScriptSemanticObjectOperation {
readonly ownerCallableId: string | null;
readonly objectBindingId: string | null;
readonly targetBindingId: string | null;
readonly propertyName: string | null;
readonly propertyPath: readonly string[] | null;
readonly resolution: "complete" | "partial";
}

View File

@ -6,10 +6,7 @@ import {
} from "./javascriptSemanticState.js";
import { evaluateSemanticBinding } from "./javascriptSemanticValues.js";
import { traverseJavaScriptAst } from "./javascriptSemanticTraversal.js";
import {
semanticStaticPropertyKey,
semanticStaticPropertyName,
} from "./javascriptAstValues.js";
import { semanticStaticPropertyKey } from "./javascriptAstValues.js";
type PropertyPath = readonly (string | number | null)[];
@ -105,13 +102,11 @@ const referencedValues = (
if (t.isSpreadElement(property))
return [{ node: property.argument, path }];
if (!t.isObjectProperty(property)) return [];
const name = semanticStaticPropertyName(
const name = semanticStaticPropertyKey(
property.key,
property.computed,
);
return key === null ||
(name === "" && !t.isStringLiteral(property.key, { value: "" })) ||
String(key) === name
return key === null || name === null || String(key) === name
? [{ node: property.value, path: remaining }]
: [];
});

View File

@ -32,25 +32,26 @@ export const invalidateSemanticMutationPath = (
return { ...value, properties };
}
if (value.status === "array") {
const index = typeof key === "number" ? key : Number(key);
if (
!Number.isSafeInteger(index) ||
index < 0 ||
String(index) !== String(key)
)
return unknown;
const items = value.items.map((item, position) =>
position === index
? invalidateSemanticMutationPath(item, remaining)
const name = String(key);
// Array length writes can remove every index; ordinary named properties
// and sparse indices affect only their own slot.
if (name === "length") return unknown;
const observed = value.items.some((item) => item.name === name);
const items = value.items.map((item) =>
item.name === name
? {
...item,
presence:
remaining.length === 0
? ("unknown-coverage" as const)
: item.presence,
value: invalidateSemanticMutationPath(item.value, remaining),
}
: item,
);
const itemPresence = {
...value.itemPresence,
...(remaining.length === 0 || value.items[index] === undefined
? { [index]: "unknown-coverage" as const }
: {}),
};
return { ...value, items, itemPresence };
if (!observed)
items.push({ name, presence: "unknown-coverage", value: unknown });
return { ...value, items };
}
return unknown;
};

View File

@ -38,20 +38,24 @@ export const collectJavaScriptSemanticObjects = (
t.isSpreadElement(node) &&
parent !== null &&
t.isObjectExpression(parent)
)
) {
const identity = expressionObjectIdentity(node.argument, state);
addObjectOperation(
{
node,
kind: "spread",
ownerCallableId,
objectBindingId: expressionBindingId(node.argument, state),
objectBindingId: identity.bindingId,
targetBindingId: null,
propertyName: null,
propertyPath: identity.path,
},
state,
output,
);
else if (t.isVariableDeclarator(node) && t.isObjectPattern(node.id))
} else if (
t.isVariableDeclarator(node) &&
(t.isObjectPattern(node.id) || t.isArrayPattern(node.id))
)
collectDestructuring(node, ownerCallableId, state, output);
},
exit: (node) => {
@ -75,8 +79,14 @@ const collectMember = (
context: ObjectCollectionContext,
): void => {
const { state, output } = context;
const name = semanticStaticPropertyKey(node.property, node.computed);
if (name === null) return;
// A chain is one property access; retaining every prefix duplicates work and
// would make full paths quadratic in deeply nested producer expressions.
if (
(t.isMemberExpression(parent) || t.isOptionalMemberExpression(parent)) &&
parent.object === node
)
return;
const identity = expressionObjectIdentity(node, state);
const write =
(t.isAssignmentExpression(parent) && parent.left === node) ||
(t.isUpdateExpression(parent) && parent.argument === node);
@ -87,9 +97,9 @@ const collectMember = (
node,
kind: "read",
ownerCallableId,
objectBindingId: expressionBindingId(node.object, state),
objectBindingId: identity.bindingId,
targetBindingId: null,
propertyName: name,
propertyPath: identity.path,
},
state,
output,
@ -99,9 +109,9 @@ const collectMember = (
node,
kind: write ? "write" : "read",
ownerCallableId,
objectBindingId: expressionBindingId(node.object, state),
objectBindingId: identity.bindingId,
targetBindingId: null,
propertyName: name,
propertyPath: identity.path,
},
state,
output,
@ -114,30 +124,41 @@ const collectDestructuring = (
state: JavaScriptSemanticAnalysisState,
output: JavaScriptSemanticObjectOperation[],
): void => {
if (!t.isObjectPattern(node.id)) return;
const objectBindingId = expressionBindingId(node.init, state);
for (const property of node.id.properties) {
if (!t.isObjectProperty(property)) continue;
const name = semanticStaticPropertyKey(property.key, property.computed);
if (name === null) continue;
const target = bindingIdentifier(property.value);
const source = expressionObjectIdentity(node.init, state);
const visit = (pattern: t.Node, path: readonly string[]): void => {
if (t.isObjectPattern(pattern)) {
for (const property of pattern.properties) {
if (!t.isObjectProperty(property)) continue;
const name = semanticStaticPropertyKey(property.key, property.computed);
if (name !== null) visit(property.value, [...path, name]);
}
return;
}
if (t.isArrayPattern(pattern)) {
pattern.elements.forEach((element, index) => {
if (element !== null && !t.isRestElement(element))
visit(element, [...path, String(index)]);
});
return;
}
const target = bindingIdentifier(pattern);
if (target === null) return;
addObjectOperation(
{
node: property,
node: pattern,
kind: "destructure",
ownerCallableId,
objectBindingId,
objectBindingId: source.bindingId,
targetBindingId:
target === null
? null
: (resolveSemanticBindingState(state, target, target.name)
?.bindingId ?? null),
propertyName: name,
resolveSemanticBindingState(state, target, target.name)?.bindingId ??
null,
propertyPath: source.path === null ? null : [...source.path, ...path],
},
state,
output,
);
}
};
visit(node.id, []);
};
interface AddObjectOperationInput {
@ -146,7 +167,7 @@ interface AddObjectOperationInput {
readonly ownerCallableId: string | null;
readonly objectBindingId: string | null;
readonly targetBindingId: string | null;
readonly propertyName: string | null;
readonly propertyPath: readonly string[] | null;
}
const addObjectOperation = (
@ -161,27 +182,57 @@ const addObjectOperation = (
ownerCallableId: input.ownerCallableId,
objectBindingId: input.objectBindingId,
targetBindingId: input.targetBindingId,
propertyName: input.propertyName,
propertyPath: input.propertyPath,
resolution:
input.kind === "spread"
? input.objectBindingId === null
? "partial"
: "complete"
: input.objectBindingId === null ||
input.propertyName === null ||
(input.kind === "destructure" && input.targetBindingId === null)
? "partial"
: "complete",
input.objectBindingId === null ||
input.propertyPath === null ||
(input.kind === "destructure" && input.targetBindingId === null)
? "partial"
: "complete",
});
};
const expressionBindingId = (
interface ObjectIdentity {
readonly bindingId: string | null;
readonly path: readonly string[] | null;
}
const expressionObjectIdentity = (
node: t.Node | null | undefined,
state: JavaScriptSemanticAnalysisState,
): string | null =>
t.isIdentifier(node)
? (resolveSemanticBindingState(state, node, node.name)?.bindingId ?? null)
: null;
): ObjectIdentity => {
const path: string[] = [];
let current = node;
let staticPath = true;
while (current !== null && current !== undefined) {
if (
t.isMemberExpression(current) ||
t.isOptionalMemberExpression(current)
) {
const name = semanticStaticPropertyKey(
current.property,
current.computed,
);
if (name === null) staticPath = false;
else path.push(name);
current = current.object;
} else if (
t.isTSAsExpression(current) ||
t.isTSTypeAssertion(current) ||
t.isTSNonNullExpression(current) ||
t.isTSSatisfiesExpression(current)
)
current = current.expression;
else break;
}
return {
bindingId: t.isIdentifier(current)
? (resolveSemanticBindingState(state, current, current.name)?.bindingId ??
null)
: null,
path: staticPath ? path.reverse() : null,
};
};
const bindingIdentifier = (node: t.Node): t.Identifier | null => {
if (t.isIdentifier(node)) return node;

View File

@ -91,7 +91,7 @@ export const semanticResourceLimitsIn = (
else if (value.status === "object")
for (const property of value.properties) pending.push(property.value);
else if (value.status === "array")
for (const item of value.items) pending.push(item);
for (const item of value.items) pending.push(item.value);
}
return [...found].sort();
};

View File

@ -1,5 +1,10 @@
import * as t from "@babel/types";
import {
semanticContainer,
semanticPropertyPointer,
} from "./javascriptSemanticSlots.js";
import type {
JavaScriptSemanticCallable,
JavaScriptSemanticModuleLink,
@ -244,54 +249,24 @@ const flattenValue = (
});
return;
}
if (value.status === "object") {
coverage.push(
value.unknownProperties
? { path, status: "partial", omitted: value.omittedProperties }
: { path, status: "complete", omitted: 0 },
);
for (const property of value.properties)
flattenValue(
property.value,
`${path}/${escapePointer(property.name)}`,
fields,
coverage,
property.presence ?? "present",
);
if ("reason" in value) {
fields.push({
path,
presence,
state: "unknown",
value: null,
reason: value.reason,
});
return;
}
if (value.status === "array") {
coverage.push(
value.unknownItems
? { path, status: "partial", omitted: value.omittedItems }
: { path, status: "complete", omitted: 0 },
const container = semanticContainer(value);
coverage.push({ path, ...container.coverage });
for (const slot of container.slots)
flattenValue(
slot.value,
`${path}${semanticPropertyPointer([slot.name])}`,
fields,
coverage,
slot.presence,
);
value.items.forEach((item, index) =>
flattenValue(
item,
`${path}/${String(index)}`,
fields,
coverage,
value.itemPresence?.[index] ?? "present",
),
);
// Sparse mutation metadata retains uncertain slots without expanding arrays.
for (const [index, itemPresence] of Object.entries(
value.itemPresence ?? {},
)) {
if (Number(index) < value.items.length) continue;
flattenValue(value, `${path}/${index}`, fields, coverage, itemPresence);
}
return;
}
fields.push({
path,
presence,
state: "unknown",
value: null,
reason: value.reason,
});
};
const escapePointer = (value: string): string =>
value.replaceAll("~", "~0").replaceAll("/", "~1");

View File

@ -0,0 +1,108 @@
import type {
JavaScriptSemanticProperty,
JavaScriptSemanticValue,
} from "./javascriptSemanticValueTypes.js";
/** A container's own slot, using the value lattice's canonical presence model. */
export type JavaScriptSemanticSlot = JavaScriptSemanticProperty;
/** Static container inventory; partial siblings do not weaken retained slots. */
export interface JavaScriptSemanticContainer {
readonly slots: readonly JavaScriptSemanticSlot[];
readonly coverage:
| { readonly status: "complete"; readonly omitted: 0 }
| { readonly status: "partial"; readonly omitted: number | null };
}
/** Read the same slot inventory for object, array, and return projections. */
export function semanticContainer(
value: Extract<
JavaScriptSemanticValue,
{ readonly status: "object" | "array" }
>,
): JavaScriptSemanticContainer;
export function semanticContainer(
value: JavaScriptSemanticValue,
): JavaScriptSemanticContainer | null;
export function semanticContainer(
value: JavaScriptSemanticValue,
): JavaScriptSemanticContainer | null {
if (value.status === "object")
return {
slots: value.properties,
coverage: value.unknownProperties
? { status: "partial", omitted: value.omittedProperties }
: { status: "complete", omitted: 0 },
};
if (value.status === "array")
return {
slots: value.items,
coverage: value.unknownItems
? { status: "partial", omitted: value.omittedItems }
: { status: "complete", omitted: 0 },
};
return null;
}
/** Resolve a full static own-property path without conflating missing siblings. */
export const semanticSlotAtPath = (
value: JavaScriptSemanticValue,
path: readonly string[],
): JavaScriptSemanticSlot => {
const leafName = path.at(-1) ?? "";
let current: JavaScriptSemanticSlot = {
name: "",
presence: "present",
value,
};
for (const [index, name] of path.entries()) {
const container = semanticContainer(current.value);
if (current.presence !== "present" || container === null)
return {
name: leafName,
presence: "unknown-coverage",
value:
"reason" in current.value
? {
...current.value,
reason: `${current.value.reason} Cannot continue ${semanticPropertyPointer(path)} through receiver ${semanticPropertyPointer(path.slice(0, index))}.`,
}
: {
status: "unknown",
reason: `Cannot resolve ${semanticPropertyPointer(path)} through ${current.value.status} receiver ${semanticPropertyPointer(path.slice(0, index))}.`,
},
};
// Array position inventories omit the intrinsic non-enumerable length slot.
// Its own presence is guaranteed even when no exact length is retained.
if (current.value.status === "array" && name === "length") {
current = {
name,
presence: "present",
value: {
status: "unknown",
reason: "Array length is present but its value is not retained.",
},
};
continue;
}
const observed = container.slots.find((slot) => slot.name === name);
current = observed ?? {
name,
presence:
container.coverage.status === "complete"
? "absent"
: "unknown-coverage",
value: {
status: "unknown",
reason: `Own property ${name} was not observed.`,
},
};
}
return current;
};
/** Encode path segments as an unambiguous JSON Pointer, preserving empty keys. */
export const semanticPropertyPointer = (path: readonly string[]): string =>
path
.map((key) => `/${key.replaceAll("~", "~0").replaceAll("/", "~1")}`)
.join("");

View File

@ -23,10 +23,7 @@ type JavaScriptSemanticObjectValue = {
type JavaScriptSemanticArrayValue = {
readonly status: "array";
readonly items: readonly JavaScriptSemanticValue[];
readonly itemPresence?: Readonly<
Record<number, "absent" | "unknown-coverage">
>;
readonly items: readonly JavaScriptSemanticProperty[];
} & (
| {
readonly unknownItems: false;
@ -56,9 +53,15 @@ export type JavaScriptSemanticValue =
readonly resourceLimit?: JavaScriptSemanticResourceLimit;
};
/** One statically named object-literal property. */
/** One statically named own slot in an object or array. */
export interface JavaScriptSemanticProperty {
readonly name: string;
readonly value: JavaScriptSemanticValue;
readonly presence?: "unknown-coverage";
readonly presence: JavaScriptSemanticSlotPresence;
}
/** Own-slot presence, independent of its value and sibling coverage. */
export type JavaScriptSemanticSlotPresence =
| "present"
| "absent"
| "unknown-coverage";

View File

@ -1,5 +1,7 @@
import * as t from "@babel/types";
import { semanticSlotAtPath } from "./javascriptSemanticSlots.js";
import { invalidateSemanticMutationPath } from "./javascriptSemanticMutationValues.js";
import type {
@ -195,9 +197,12 @@ const evaluateTemplate = (
let candidates = [""];
for (let index = 0; index < node.quasis.length; index += 1) {
const quasi = node.quasis[index];
// Semantic template evaluation retains its established raw fallback for
// synthetic AST inputs; exact atom readers remain cooked-only.
const text = quasi?.value.cooked ?? quasi?.value.raw ?? "";
const text = quasi?.value.cooked;
if (text === undefined || text === null)
return {
status: "unknown",
reason: "Template text has no cooked representation.",
};
if (exceedsSemanticTemplateByteBudget(candidates, [text]))
return semanticResourceLimitUnknown("primitive-bytes");
candidates = candidates.map((prefix) => `${prefix}${text}`);
@ -235,6 +240,7 @@ const evaluateObject = (
for (const [name] of propertiesByName)
propertiesByName.set(name, {
name,
presence: "present",
value: {
status: "unknown",
reason: "A later property may overwrite this value.",
@ -268,6 +274,7 @@ const evaluateObject = (
}
propertiesByName.set(name, {
name,
presence: "present",
value: t.isObjectProperty(property)
? evaluateExpression(property.value, nestedContext(context))
: {
@ -298,8 +305,7 @@ const evaluateArray = (
node: t.ArrayExpression,
context: EvaluationContext,
): JavaScriptSemanticValue => {
const items: JavaScriptSemanticValue[] = [];
const itemPresence: Record<number, "absent"> = {};
const items: JavaScriptSemanticProperty[] = [];
let unknownItems = false;
let omittedItems: number | null = 0;
for (const element of node.elements) {
@ -310,21 +316,24 @@ const evaluateArray = (
break;
}
if (element === null) {
itemPresence[items.length] = "absent";
items.push({
status: "unknown",
reason: "Array hole has no primitive value.",
name: String(items.length),
presence: "absent",
value: { status: "unknown", reason: "Array hole has no own value." },
});
continue;
}
items.push(evaluateExpression(element, nestedContext(context)));
items.push({
name: String(items.length),
presence: "present",
value: evaluateExpression(element, nestedContext(context)),
});
}
return unknownItems
? { status: "array", items, itemPresence, unknownItems: true, omittedItems }
? { status: "array", items, unknownItems: true, omittedItems }
: {
status: "array",
items,
itemPresence,
unknownItems: false,
omittedItems: 0,
};
@ -436,46 +445,16 @@ const projectValue = (
value: JavaScriptSemanticValue,
projection: readonly (string | number | null)[],
): JavaScriptSemanticValue => {
let current = value;
for (const key of projection) {
if (key === null)
return {
if (projection.includes(null))
return { status: "unknown", reason: "Cannot project a dynamic property." };
const path = projection.map((key) => String(key));
const slot = semanticSlotAtPath(value, path);
return slot.presence === "present"
? slot.value
: {
status: "unknown",
reason: "Cannot project a dynamic property.",
reason: `Own property ${path.join("/")} is ${slot.presence}.`,
};
if (current.status === "object" && typeof key === "string") {
const property = current.properties.find(({ name }) => name === key);
if (property === undefined)
return {
status: current.unknownProperties ? "unknown" : "unknown",
reason: `Object property ${key} was not observed.`,
};
current = property.value;
} else if (current.status === "array") {
const index = typeof key === "number" ? key : Number(key);
if (
!Number.isSafeInteger(index) ||
index < 0 ||
String(index) !== String(key)
)
return {
status: "unknown",
reason: `Array property ${String(key)} is not a canonical index.`,
};
const item = current.items[index];
if (item === undefined)
return {
status: "unknown",
reason: `Array item ${String(key)} missing.`,
};
current = item;
} else
return {
status: "unknown",
reason: `Cannot project ${String(key)} from ${current.status}.`,
};
}
return current;
};
const provenanceForBinding = (

View File

@ -463,7 +463,7 @@ describe("JavaScript export localized mutation uncertainty", () => {
});
describe("JavaScript export property presence boundaries", () => {
it("normalizes omitted legacy presence before comparing identical literals and unions", async () => {
it("rejects return-shape observations that omit required slot presence", async () => {
const source =
'export default () => ({ kind: "result", count: flag ? 1 : 2, nested: { enabled: true } });';
const [left, right] = await analyzeSources({ left: source, right: source });
@ -513,9 +513,14 @@ describe("JavaScript export property presence boundaries", () => {
[right, { ...left, graph }],
] as const) {
const result = compare(sides[0], sides[1]);
expect(result.coverage.paired_variants).toBe(1);
expect(result.changes).toEqual([]);
expect(result.coverage.status).toBe("complete-within-inputs");
expect(result.coverage.paired_variants).toBe(0);
expect([result.left.status, result.right.status]).toContain(
"unavailable",
);
expect(result.changes).toEqual([
expect.objectContaining({ status: "unknown", path: "" }),
]);
expect(result.coverage.status).toBe("partial");
}
});

View File

@ -41,7 +41,7 @@ it("executes the advertised export presence example with matching analyzed Evide
});
expect(response.isError).not.toBe(true);
expect(response.structuredContent).toMatchObject({
result: {
normalized_result: {
left: { status: "selected" },
right: { status: "selected" },
summary: { added: 1, removed: 1, changed: 0, unknown: 0 },
@ -102,7 +102,7 @@ it("traces example semantic modules with their parsed artifact digests", async (
});
expect(response.isError).not.toBe(true);
expect(response.structuredContent).toMatchObject({
result: {
normalized_result: {
nodes: expect.arrayContaining([
expect.objectContaining({
node_id: module.node_id,
@ -161,10 +161,8 @@ describe("application workflow MCP parity", () => {
expect(relativeApplication.isError).not.toBe(true);
expect(relativeApplication.structuredContent).toMatchObject({
evidence_id: left.value.evidence_id,
result: { input_path: leftAnalysis.input_path },
evidence: {
subject: { local_path: left.value.subject?.local_path },
},
normalized_result: { input_path: leftAnalysis.input_path },
subject: { local_path: left.value.subject?.local_path },
});
const full = await client.callTool({
name: "compare_javascript_export_shapes",
@ -172,7 +170,7 @@ describe("application workflow MCP parity", () => {
});
expect(full.isError).not.toBe(true);
expect(full.structuredContent).toMatchObject({
result: {
normalized_result: {
summary: { added: 1, removed: 0, changed: 0, unknown: 0 },
property_inventories: expect.arrayContaining([
expect.objectContaining({
@ -231,7 +229,7 @@ describe("application workflow MCP parity", () => {
});
expect(semantic.isError).not.toBe(true);
expect(semantic.structuredContent).toMatchObject({
result: {
normalized_result: {
source_evidence_id: left.value.evidence_id,
source_graph_id: analyzed.semantic_graph.graph_id,
summary: { total_seed_matches: 1 },