[ASTGen] Add some test cases for expression generation

Author: rintaro

test/ASTGen/exprs.swift

@@ -104,6 +104,12 @@ func testTrailingClsure() {
   acceptClosures(x: {}, y: { 12 }) {}
 }
 
+func testInOut() {
+  func acceptInOut(arg: inout Int) { arg += 1 }
+  var value = 42
+  acceptInOut(arg: &value)
+}
+
 func testStringLiteral(arg: Int) {
   _ = "test"
   _ = "foo\(arg)bar"
@@ -129,3 +135,46 @@ func testStringLiteral(arg: Int) {
     baz
     """
 }
+
+func testNumberLiteral() {
+  _ = 12
+  _ = 1_2
+  _ = 0xab
+  _ = 0xab_p2
+  _ = 12.42
+  _ = 0b0000_1100_1000
+  _ = 1_
+  _ = 1_000
+  _ = 0b1111_0000_
+  _ = 0b1111_0000
+  _  = 0o127_777_
+  _ = 0o127_777
+  _ = 0x12FF_FFFF
+  _ = 0x12FF_FFFF_
+  _ = 1.0e42
+  _ = 0x1.0p0
+  _ = 0x1.fffffep+2
+  _ = 1_000.200_001e1_000
+  _ =  0x1_0000.0FFF_ABCDp10_001
+}
+
+class BaseCls {
+  init(base: Int) {}
+}
+class DerivedCls: BaseCls {
+  init(testSuperRef arg: Int) { super.init(base: arg) }
+}
+
+struct HasSubscript {
+  subscript(label label: Int, args: Int) -> Int { return 1 }
+}
+func testSubscript(intArry: [Int], val: HasSubscript) {
+  _ = intArry[12]
+  _ = val[label: 42, 14]
+}
+
+struct Generic<T: Comparable> {}
+func testSpecializeExpr() {
+  _ = Generic<Int>.self
+  _ = Generic<Int>()
+}

test/ASTGen/regex.swift

@@ -0,0 +1,39 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend %s -dump-parse -enable-bare-slash-regex -enable-experimental-feature ParserASTGen > %t/astgen.ast.raw
+// RUN: %target-swift-frontend %s -dump-parse -enable-bare-slash-regex > %t/cpp-parser.ast.raw
+
+// Filter out any addresses in the dump, since they can differ.
+// RUN: sed -E 's#0x[0-9a-fA-F]+##g' %t/cpp-parser.ast.raw > %t/cpp-parser.ast
+// RUN: sed -E 's#0x[0-9a-fA-F]+##g' %t/astgen.ast.raw > %t/astgen.ast
+
+// RUN: %diff -u %t/astgen.ast %t/cpp-parser.ast
+
+// RUN: %target-typecheck-verify-swift -enable-experimental-feature ParserASTGen -enable-bare-slash-regex
+
+// REQUIRES: swift_swift_parser
+
+// -enable-experimental-feature requires an asserts build
+// REQUIRES: asserts
+// rdar://116686158
+// UNSUPPORTED: asan
+
+func testRegexLiteral() {
+  _ = /abc/
+  _ = #/abc/#
+  _ = ##/abc/##
+
+  func foo<T>(_ x: T...) {}
+  foo(/abc/, #/abc/#, ##/abc/##)
+
+  let _ = [/abc/, #/abc/#, ##/abc/##]
+
+  _ = /\w+/.self
+  _ = #/\w+/#.self
+  _ = ##/\w+/##.self
+
+  _ = /#\/\#\\/
+  _ = #/#/\/\#\\/#
+  _ = ##/#|\|\#\\/##
+}
+
+