From 73f5f02e97f2dfa5b1d7ae009520474e52ec8dd5 Mon Sep 17 00:00:00 2001
From: Alex T <alexander.tarasyuk@outlook.com>
Date: Fri, 25 Sep 2020 23:01:08 +0300
Subject: [PATCH] fix(40756): disable truncation for inferred type (#40764)

---
 src/services/utilities.ts                     |   2 +-
 .../codeFixInferFromUsageNoTruncation.ts      | 102 ++++++++++++++++++
 2 files changed, 103 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/codeFixInferFromUsageNoTruncation.ts

diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 0a2572f4d79..8a85a3af759 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -2528,7 +2528,7 @@ namespace ts {
         const checker = program.getTypeChecker();
         let typeIsAccessible = true;
         const notAccessible = () => { typeIsAccessible = false; };
-        const res = checker.typeToTypeNode(type, enclosingScope, /*flags*/ undefined, {
+        const res = checker.typeToTypeNode(type, enclosingScope, NodeBuilderFlags.NoTruncation, {
             trackSymbol: (symbol, declaration, meaning) => {
                 typeIsAccessible = typeIsAccessible && checker.isSymbolAccessible(symbol, declaration, meaning, /*shouldComputeAliasToMarkVisible*/ false).accessibility === SymbolAccessibility.Accessible;
             },
diff --git a/tests/cases/fourslash/codeFixInferFromUsageNoTruncation.ts b/tests/cases/fourslash/codeFixInferFromUsageNoTruncation.ts
new file mode 100644
index 00000000000..b9448cb8f6e
--- /dev/null
+++ b/tests/cases/fourslash/codeFixInferFromUsageNoTruncation.ts
@@ -0,0 +1,102 @@
+/// <reference path='fourslash.ts' />
+
+////function foo(param) {
+////    const a: {
+////        a: {
+////            a_1: string;
+////            a_2: {
+////                a_2_1: string;
+////            }
+////        };
+////        b: {
+////            b_1: string;
+////            b_2: string;
+////            b_3: string;
+////        };
+////        c: {
+////            c_1: string;
+////            c_2: string;
+////            c_3: string;
+////            c_4: {
+////                c_4_1: {
+////                    c_4_1_1: {
+////                        c_4_1_1_1: {
+////                            c_4_1_1_1_1: string;
+////                            c_4_1_1_1_2: string;
+////                            c_4_1_1_1_3: string;
+////                        }
+////                    }
+////                }
+////            }
+////        };
+////        d: {
+////            d_1: {
+////                d_1_1: {
+////                    d_1_1_1: string;
+////                }
+////                d_1_2: {
+////                    d_1_2_1: string;
+////                }
+////                d_1_3: {
+////                    d_1_3_1: string;
+////                    d_1_3_2: string;
+////                }
+////            }
+////            d_2: string;
+////            d_3: string;
+////        }
+////    } = param;
+////}
+
+verify.codeFix({
+    description: "Infer parameter types from usage",
+    index: 0,
+    newFileContent:
+`function foo(param: { a: { a_1: string; a_2: { a_2_1: string; }; }; b: { b_1: string; b_2: string; b_3: string; }; c: { c_1: string; c_2: string; c_3: string; c_4: { c_4_1: { c_4_1_1: { c_4_1_1_1: { c_4_1_1_1_1: string; c_4_1_1_1_2: string; c_4_1_1_1_3: string; }; }; }; }; }; d: { d_1: { d_1_1: { d_1_1_1: string; }; d_1_2: { d_1_2_1: string; }; d_1_3: { d_1_3_1: string; d_1_3_2: string; }; }; d_2: string; d_3: string; }; }) {
+    const a: {
+        a: {
+            a_1: string;
+            a_2: {
+                a_2_1: string;
+            }
+        };
+        b: {
+            b_1: string;
+            b_2: string;
+            b_3: string;
+        };
+        c: {
+            c_1: string;
+            c_2: string;
+            c_3: string;
+            c_4: {
+                c_4_1: {
+                    c_4_1_1: {
+                        c_4_1_1_1: {
+                            c_4_1_1_1_1: string;
+                            c_4_1_1_1_2: string;
+                            c_4_1_1_1_3: string;
+                        }
+                    }
+                }
+            }
+        };
+        d: {
+            d_1: {
+                d_1_1: {
+                    d_1_1_1: string;
+                }
+                d_1_2: {
+                    d_1_2_1: string;
+                }
+                d_1_3: {
+                    d_1_3_1: string;
+                    d_1_3_2: string;
+                }
+            }
+            d_2: string;
+            d_3: string;
+        }
+    } = param;
+}`,
+});