From b446095c4dee992bbce3a82c12ed8560530ba81a Mon Sep 17 00:00:00 2001
From: Alan <alan.agius4@gmail.com>
Date: Fri, 22 Feb 2019 11:55:10 +0100
Subject: [PATCH] refactor: remove unused functions and classes in diagnostics
 (#28923)

PR Close #28923
---
 .../src/diagnostics/typescript_symbols.ts     | 60 +------------------
 1 file changed, 2 insertions(+), 58 deletions(-)

diff --git a/packages/compiler-cli/src/diagnostics/typescript_symbols.ts b/packages/compiler-cli/src/diagnostics/typescript_symbols.ts
index 30fa65cb52..ccd3897661 100644
--- a/packages/compiler-cli/src/diagnostics/typescript_symbols.ts
+++ b/packages/compiler-cli/src/diagnostics/typescript_symbols.ts
@@ -6,12 +6,11 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {AotSummaryResolver, CompileMetadataResolver, CompilePipeSummary, CompilerConfig, DEFAULT_INTERPOLATION_CONFIG, DirectiveNormalizer, DirectiveResolver, DomElementSchemaRegistry, HtmlParser, InterpolationConfig, NgAnalyzedModules, NgModuleResolver, ParseTreeResult, PipeResolver, ResourceLoader, StaticReflector, StaticSymbol, StaticSymbolCache, StaticSymbolResolver, SummaryResolver} from '@angular/compiler';
-import * as fs from 'fs';
+import {CompilePipeSummary, StaticSymbol} from '@angular/compiler';
 import * as path from 'path';
 import * as ts from 'typescript';
 
-import {BuiltinType, DeclarationKind, Definition, PipeInfo, Pipes, Signature, Span, Symbol, SymbolDeclaration, SymbolQuery, SymbolTable} from './symbols';
+import {BuiltinType, DeclarationKind, Definition, Signature, Span, Symbol, SymbolDeclaration, SymbolQuery, SymbolTable} from './symbols';
 import {isVersionBetween} from './typescript_version';
 
 // In TypeScript 2.1 these flags moved
@@ -647,50 +646,6 @@ class EmptyTable implements SymbolTable {
   static instance = new EmptyTable();
 }
 
-function findTsConfig(fileName: string): string|undefined {
-  let dir = path.dirname(fileName);
-  while (fs.existsSync(dir)) {
-    const candidate = path.join(dir, 'tsconfig.json');
-    if (fs.existsSync(candidate)) return candidate;
-    const parentDir = path.dirname(dir);
-    if (parentDir === dir) break;
-    dir = parentDir;
-  }
-}
-
-function isBindingPattern(node: ts.Node): node is ts.BindingPattern {
-  return !!node && (node.kind === ts.SyntaxKind.ArrayBindingPattern ||
-                    node.kind === ts.SyntaxKind.ObjectBindingPattern);
-}
-
-function walkUpBindingElementsAndPatterns(node: ts.Node): ts.Node {
-  while (node && (node.kind === ts.SyntaxKind.BindingElement || isBindingPattern(node))) {
-    node = node.parent !;
-  }
-
-  return node;
-}
-
-function getCombinedNodeFlags(node: ts.Node): ts.NodeFlags {
-  node = walkUpBindingElementsAndPatterns(node);
-
-  let flags = node.flags;
-  if (node.kind === ts.SyntaxKind.VariableDeclaration) {
-    node = node.parent !;
-  }
-
-  if (node && node.kind === ts.SyntaxKind.VariableDeclarationList) {
-    flags |= node.flags;
-    node = node.parent !;
-  }
-
-  if (node && node.kind === ts.SyntaxKind.VariableStatement) {
-    flags |= node.flags;
-  }
-
-  return flags;
-}
-
 function isSymbolPrivate(s: ts.Symbol): boolean {
   return !!s.valueDeclaration && isPrivate(s.valueDeclaration);
 }
@@ -753,15 +708,6 @@ function setParents<T extends ts.Node>(node: T, parent: ts.Node): T {
   return node;
 }
 
-function spanOf(node: ts.Node): Span {
-  return {start: node.getStart(), end: node.getEnd()};
-}
-
-function shrink(span: Span, offset?: number) {
-  if (offset == null) offset = 1;
-  return {start: span.start + offset, end: span.end - offset};
-}
-
 function spanAt(sourceFile: ts.SourceFile, line: number, column: number): Span|undefined {
   if (line != null && column != null) {
     const position = ts.getPositionOfLineAndCharacter(sourceFile, line, column);
@@ -863,8 +809,6 @@ function typeKindOf(type: ts.Type | undefined): BuiltinType {
   return BuiltinType.Other;
 }
 
-
-
 function getFromSymbolTable(symbolTable: ts.SymbolTable, key: string): ts.Symbol|undefined {
   const table = symbolTable as any;
   let symbol: ts.Symbol|undefined;