Pretty print inexact (#5304)

src/language-js/printer-estree.js

@@ -1288,13 +1288,18 @@ function printPathNoParens(path, options, print, args) {
         return result;
       });
 
+      if (n.inexact) {
+        props.push(concat(separatorParts.concat(group("..."))));
+      }
+
       const lastElem = getLast(n[propertiesField]);
 
       const canHaveTrailingSeparator = !(
         lastElem &&
         (lastElem.type === "RestProperty" ||
           lastElem.type === "RestElement" ||
-          hasNodeIgnoreComment(lastElem))
+          hasNodeIgnoreComment(lastElem) ||
+          n.inexact)
       );
 
       let content;

tests/flow_object_inexact/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,96 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`test.js - flow-verify 1`] = `
+//@flow
+type T = {
+  a: number,
+  ...,
+}
+
+type U = { a: number, b: number, c: number, d: number, e: number, f: number, g: number, ...};
+
+type V = {x: {...}, y: {x: {...}, a: number, b: number, c: number, d: number, e: number, f: number, ...}, z: {...}, foo: number, bar: {foo: number, ...}, ...};
+
+function test(x: {foo: number, bar: number, baz: number, qux: nunber, a: number, b: number, c: {a: number, ...}, ...}) { return x; }
+function test(x: {foo: number, bar: number, baz: number, qux: nunber, a: number, b: number, c: {a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, ...}, ...}) { return x; }
+
+type W = {...};
+type X = {
+  ...,
+};
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//@flow
+type T = {
+  a: number,
+  ...
+};
+
+type U = {
+  a: number,
+  b: number,
+  c: number,
+  d: number,
+  e: number,
+  f: number,
+  g: number,
+  ...
+};
+
+type V = {
+  x: { ... },
+  y: {
+    x: { ... },
+    a: number,
+    b: number,
+    c: number,
+    d: number,
+    e: number,
+    f: number,
+    ...
+  },
+  z: { ... },
+  foo: number,
+  bar: { foo: number, ... },
+  ...
+};
+
+function test(x: {
+  foo: number,
+  bar: number,
+  baz: number,
+  qux: nunber,
+  a: number,
+  b: number,
+  c: { a: number, ... },
+  ...
+}) {
+  return x;
+}
+function test(x: {
+  foo: number,
+  bar: number,
+  baz: number,
+  qux: nunber,
+  a: number,
+  b: number,
+  c: {
+    a: number,
+    b: number,
+    c: number,
+    d: number,
+    e: number,
+    f: number,
+    g: number,
+    h: number,
+    i: number,
+    ...
+  },
+  ...
+}) {
+  return x;
+}
+
+type W = { ... };
+type X = { ... };
+
+`;

tests/flow_object_inexact/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, ["flow"], { trailingComma: "es5" });

tests/flow_object_inexact/test.js

@@ -0,0 +1,17 @@
+//@flow
+type T = {
+  a: number,
+  ...,
+}
+
+type U = { a: number, b: number, c: number, d: number, e: number, f: number, g: number, ...};
+
+type V = {x: {...}, y: {x: {...}, a: number, b: number, c: number, d: number, e: number, f: number, ...}, z: {...}, foo: number, bar: {foo: number, ...}, ...};
+
+function test(x: {foo: number, bar: number, baz: number, qux: nunber, a: number, b: number, c: {a: number, ...}, ...}) { return x; }
+function test(x: {foo: number, bar: number, baz: number, qux: nunber, a: number, b: number, c: {a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, ...}, ...}) { return x; }
+
+type W = {...};
+type X = {
+  ...,
+};