[clang] [clang-format] Add an option to format integer and float literal case (PR #151590)

[via cfe-commits]

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@@ -0,0 +1,354 @@
+//===- unittest/Format/NumericLiteralCaseTest.cpp -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "FormatTestBase.h"
+
+#define DEBUG_TYPE "numeric-literal-case-test"
+
+namespace clang {
+namespace format {
+namespace test {
+namespace {
+
+class NumericLiteralCaseTest : public FormatTestBase {};
+
+TEST_F(NumericLiteralCaseTest, Prefix) {
+  FormatStyle Style = getLLVMStyle();
+  EXPECT_EQ(Style.Language, FormatStyle::LK_Cpp);
+  EXPECT_EQ(Style.NumericLiteralCase.Prefix, FormatStyle::NLCS_Leave);
+  EXPECT_EQ(Style.NumericLiteralCase.HexDigit, FormatStyle::NLCS_Leave);
+  EXPECT_EQ(Style.NumericLiteralCase.ExponentLetter, FormatStyle::NLCS_Leave);
+  EXPECT_EQ(Style.NumericLiteralCase.Suffix, FormatStyle::NLCS_Leave);
+
+  constexpr StringRef Bin0{"b = 0b0'10'010uL;"};
+  constexpr StringRef Bin1{"b = 0B010'010Ul;"};
+  constexpr StringRef Hex0{"b = 0xdead'BEEFuL;"};
+  constexpr StringRef Hex1{"b = 0Xdead'BEEFUl;"};
+  verifyFormat(Bin0, Style);
+  verifyFormat(Bin1, Style);
+  verifyFormat(Hex0, Style);
+  verifyFormat(Hex1, Style);
+
+  Style.NumericLiteralCase.Prefix = FormatStyle::NLCS_Upper;
+  verifyFormat("b = 0B0'10'010uL;", Bin0, Style);
+  verifyFormat(Bin1, Style);
+  verifyFormat("b = 0Xdead'BEEFuL;", Hex0, Style);
+  verifyFormat(Hex1, Style);
+  verifyFormat("i = 0XaBcD.a0Ebp123F;", Style);
+  verifyFormat("j = 0XaBcD.a0EbP123f;", Style);
+
+  Style.NumericLiteralCase.Prefix = FormatStyle::NLCS_Lower;
+  verifyFormat(Bin0, Style);
+  verifyFormat("b = 0b010'010Ul;", Bin1, Style);
+  verifyFormat(Hex0, Style);
+  verifyFormat("b = 0xdead'BEEFUl;", Hex1, Style);
+}
+
+TEST_F(NumericLiteralCaseTest, HexDigit) {
+  FormatStyle Style = getLLVMStyle();
+
+  constexpr StringRef A{"a = 0xaBc0'123fuL;"};
+  constexpr StringRef B{"b = 0XaBc0'123FUl;"};
+  constexpr StringRef C{"c = 0xa'Bc.0p12'3f32;"};
+  constexpr StringRef D{"d = 0xa'Bc.0P12'3F128;"};
+  constexpr StringRef E{"e = 0b0011'00Ull;"};
+  constexpr StringRef F{"f = 0B0100'000zu;"};
+  constexpr StringRef G{"g = 0.123e-19f;"};
+  constexpr StringRef H{"h = 0.12'3E-19F16;"};
+  constexpr StringRef I{"i = 0x.0000aBcp12'3F128;"};
+  constexpr StringRef J{"j = 0xaa1'fP12'3F128;"};
+  constexpr StringRef K{"k = 0x0;"};
+  constexpr StringRef L{"l = 0xA;"};
+
+  verifyFormat(A, Style);
+  verifyFormat(B, Style);
+  verifyFormat(C, Style);
+  verifyFormat(D, Style);
+  verifyFormat(E, Style);
+  verifyFormat(F, Style);
+  verifyFormat(G, Style);
+  verifyFormat(H, Style);
+  verifyFormat(I, Style);
+  verifyFormat(J, Style);
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owenca wrote:

Ditto.

https://github.com/llvm/llvm-project/pull/151590