Update lexer to not include `-` in numbers.

This CL removes the parsing of a `-` in front of numerics when lexed.
This will cause the number to become a UnaryOperator negation then the
number instead of a negative number.

Bug: tint:1679, tint:1141, tint:1570
Change-Id: I217c0ffcbe5be934c8d56bd83141b47ade83bc60
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106463
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
diff --git a/src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator_test.cc b/src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator_test.cc
index 08d94e8..8e00197 100644
--- a/src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator_test.cc
+++ b/src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator_test.cc
@@ -203,7 +203,7 @@
     ASSERT_TRUE(result.success) << result.error;
 
     std::string expected_shader = R"(fn main() {
-  let b : vec3<i32> = vec3<i32>(1, 3, -1);
+  let b : vec3<i32> = vec3<i32>(1, 3, -(1));
   var comp_b : vec3<i32> = -(b);
 }
 )";
@@ -246,7 +246,7 @@
     ASSERT_TRUE(result.success) << result.error;
 
     std::string expected_shader = R"(fn main() {
-  var a = -5;
+  var a = -(5);
   var neg_a = ~(a);
 }
 )";
@@ -288,7 +288,7 @@
     ASSERT_TRUE(result.success) << result.error;
 
     std::string expected_shader = R"(fn main() {
-  var b : vec3<i32> = vec3<i32>(1, 3, -1);
+  var b : vec3<i32> = vec3<i32>(1, 3, -(1));
   let neg_b : vec3<i32> = ~(b);
 }
 )";
diff --git a/src/tint/fuzzers/tint_ast_fuzzer/mutations/wrap_unary_operator_test.cc b/src/tint/fuzzers/tint_ast_fuzzer/mutations/wrap_unary_operator_test.cc
index 4da9bf7..c73c1b3 100644
--- a/src/tint/fuzzers/tint_ast_fuzzer/mutations/wrap_unary_operator_test.cc
+++ b/src/tint/fuzzers/tint_ast_fuzzer/mutations/wrap_unary_operator_test.cc
@@ -260,7 +260,7 @@
     ASSERT_TRUE(result.success) << result.error;
 
     std::string expected_shader = R"(fn main() {
-  var a : vec4<f32> = -(vec4<f32>(-1.0, -1.0, -1.0, -1.0));
+  var a : vec4<f32> = -(vec4<f32>(-(1.0), -(1.0), -(1.0), -(1.0)));
 }
 )";
     ASSERT_EQ(expected_shader, result.wgsl);
@@ -345,7 +345,7 @@
     ASSERT_TRUE(result.success) << result.error;
 
     std::string expected_shader = R"(fn main() {
-  var a : vec4<i32> = ~(vec4<i32>(1, 0, -1, 0));
+  var a : vec4<i32> = ~(vec4<i32>(1, 0, -(1), 0));
 }
 )";
     ASSERT_EQ(expected_shader, result.wgsl);
diff --git a/src/tint/reader/wgsl/lexer.cc b/src/tint/reader/wgsl/lexer.cc
index 0bc19ad..16712ca 100644
--- a/src/tint/reader/wgsl/lexer.cc
+++ b/src/tint/reader/wgsl/lexer.cc
@@ -328,9 +328,6 @@
     auto source = begin_source();
     bool has_mantissa_digits = false;
 
-    if (matches(end, '-')) {
-        end++;
-    }
     while (end < length() && is_digit(at(end))) {
         has_mantissa_digits = true;
         end++;
@@ -426,7 +423,6 @@
     constexpr uint64_t kExponentMask = (1 << kExponentBits) - 1;
     constexpr int64_t kExponentMax = kExponentMask;  // Including NaN / inf
     constexpr uint64_t kExponentLeftShift = kMantissaBits;
-    constexpr uint64_t kSignBit = kTotalBits - 1;
     constexpr uint64_t kOne = 1;
 
     auto start = pos();
@@ -434,16 +430,8 @@
 
     auto source = begin_source();
 
-    // clang-format off
-  // -?0[xX]([0-9a-fA-F]*.?[0-9a-fA-F]+ | [0-9a-fA-F]+.[0-9a-fA-F]*)(p|P)(+|-)?[0-9]+  // NOLINT
-    // clang-format on
+    // 0[xX]([0-9a-fA-F]*.?[0-9a-fA-F]+ | [0-9a-fA-F]+.[0-9a-fA-F]*)(p|P)(+|-)?[0-9]+  // NOLINT
 
-    // -?
-    uint64_t sign_bit = 0;
-    if (matches(end, '-')) {
-        sign_bit = 1;
-        end++;
-    }
     // 0[xX]
     if (matches(end, '0') && (matches(end + 1, 'x') || matches(end + 1, 'X'))) {
         end += 2;
@@ -696,7 +684,7 @@
     }
 
     // Combine sign, mantissa, and exponent
-    uint64_t result_u64 = sign_bit << kSignBit;
+    uint64_t result_u64 = 0;
     result_u64 |= mantissa;
     result_u64 |= (static_cast<uint64_t>(signed_exponent) & kExponentMask) << kExponentLeftShift;
 
@@ -856,10 +844,6 @@
 
     auto source = begin_source();
 
-    if (matches(curr, '-')) {
-        curr++;
-    }
-
     if (matches(curr, '0') && (matches(curr + 1, 'x') || matches(curr + 1, 'X'))) {
         curr += 2;
     } else {
@@ -880,10 +864,6 @@
 
     auto source = begin_source();
 
-    if (matches(curr, '-')) {
-        curr++;
-    }
-
     if (curr >= length() || !is_digit(at(curr))) {
         return {};
     }
diff --git a/src/tint/reader/wgsl/lexer_test.cc b/src/tint/reader/wgsl/lexer_test.cc
index 3268eaf..a7c13e6 100644
--- a/src/tint/reader/wgsl/lexer_test.cc
+++ b/src/tint/reader/wgsl/lexer_test.cc
@@ -426,57 +426,35 @@
                              // No decimal, with 'f' suffix
                              FloatData{"0f", 0.0},
                              FloatData{"1f", 1.0},
-                             FloatData{"-0f", 0.0},
-                             FloatData{"-1f", -1.0},
                              // No decimal, with 'h' suffix
                              FloatData{"0h", 0.0},
                              FloatData{"1h", 1.0},
-                             FloatData{"-0h", 0.0},
-                             FloatData{"-1h", -1.0},
 
                              // Zero, with decimal.
                              FloatData{"0.0", 0.0},
                              FloatData{"0.", 0.0},
                              FloatData{".0", 0.0},
-                             FloatData{"-0.0", 0.0},
-                             FloatData{"-0.", 0.0},
-                             FloatData{"-.0", 0.0},
                              // Zero, with decimal and 'f' suffix
                              FloatData{"0.0f", 0.0},
                              FloatData{"0.f", 0.0},
                              FloatData{".0f", 0.0},
-                             FloatData{"-0.0f", 0.0},
-                             FloatData{"-0.f", 0.0},
-                             FloatData{"-.0f", 0.0},
                              // Zero, with decimal and 'h' suffix
                              FloatData{"0.0h", 0.0},
                              FloatData{"0.h", 0.0},
                              FloatData{".0h", 0.0},
-                             FloatData{"-0.0h", 0.0},
-                             FloatData{"-0.h", 0.0},
-                             FloatData{"-.0h", 0.0},
 
                              // Non-zero with decimal
                              FloatData{"5.7", 5.7},
                              FloatData{"5.", 5.},
                              FloatData{".7", .7},
-                             FloatData{"-5.7", -5.7},
-                             FloatData{"-5.", -5.},
-                             FloatData{"-.7", -.7},
                              // Non-zero with decimal and 'f' suffix
                              FloatData{"5.7f", static_cast<double>(5.7f)},
                              FloatData{"5.f", static_cast<double>(5.f)},
                              FloatData{".7f", static_cast<double>(.7f)},
-                             FloatData{"-5.7f", static_cast<double>(-5.7f)},
-                             FloatData{"-5.f", static_cast<double>(-5.f)},
-                             FloatData{"-.7f", static_cast<double>(-.7f)},
                              // Non-zero with decimal and 'h' suffix
                              FloatData{"5.7h", static_cast<double>(f16::Quantize(5.7f))},
                              FloatData{"5.h", static_cast<double>(f16::Quantize(5.f))},
                              FloatData{".7h", static_cast<double>(f16::Quantize(.7f))},
-                             FloatData{"-5.7h", static_cast<double>(f16::Quantize(-5.7f))},
-                             FloatData{"-5.h", static_cast<double>(f16::Quantize(-5.f))},
-                             FloatData{"-.7h", static_cast<double>(f16::Quantize(-.7f))},
 
                              // No decimal, with exponent
                              FloatData{"1e5", 1e5},
@@ -532,7 +510,6 @@
 INSTANTIATE_TEST_SUITE_P(LexerTest,
                          FloatTest_Invalid,
                          testing::Values(".",
-                                         "-.",
                                          // Need a mantissa digit
                                          ".e5",
                                          ".E5",
@@ -545,9 +522,7 @@
                                          ".e-",
                                          // Overflow
                                          "2.5e+256f",
-                                         "-2.5e+127f",
                                          "6.5520e+4h",
-                                         "-6.5e+12h",
                                          // Decimal exponent must immediately
                                          // follow the 'e'.
                                          "2.5e 12",
@@ -791,12 +766,9 @@
                          testing::Combine(testing::Values('\0'),  // No suffix
                                           testing::ValuesIn(std::vector<ParseIntegerCase>{
                                               {"0", 0},
-                                              {"-2", -2},
                                               {"2", 2},
                                               {"123", 123},
                                               {"2147483647", 2147483647},
-                                              {"-2147483648", -2147483648LL},
-                                              {"-9223372036854775808", -9223372036854775807LL - 1},
                                           })));
 
 INSTANTIATE_TEST_SUITE_P(Dec_u32,
@@ -813,11 +785,8 @@
                          testing::Combine(testing::Values('i'),  // Suffix
                                           testing::ValuesIn(std::vector<ParseIntegerCase>{
                                               {"0i", 0u},
-                                              {"-0i", 0u},
                                               {"123i", 123},
-                                              {"-123i", -123},
                                               {"2147483647i", 2147483647},
-                                              {"-2147483647i", -2147483647ll},
                                           })));
 
 INSTANTIATE_TEST_SUITE_P(Hex_AInt,
@@ -828,16 +797,10 @@
                                               {"0X0", 0},
                                               {"0x42", 66},
                                               {"0X42", 66},
-                                              {"-0x42", -66},
-                                              {"-0X42", -66},
                                               {"0xeF1Abc9", 0xeF1Abc9},
                                               {"0XeF1Abc9", 0xeF1Abc9},
-                                              {"-0xeF1Abc9", -0xeF1Abc9},
-                                              {"-0XeF1Abc9", -0xeF1Abc9},
                                               {"0x80000000", 0x80000000},
                                               {"0X80000000", 0X80000000},
-                                              {"-0x80000000", -0x80000000ll},
-                                              {"-0X80000000", -0X80000000ll},
                                               {"0x7FFFFFFF", 0x7fffffff},
                                               {"0X7FFFFFFF", 0x7fffffff},
                                               {"0x7fffffff", 0x7fffffff},
@@ -845,7 +808,6 @@
                                               {"0x7FfFfFfF", 0x7fffffff},
                                               {"0X7FfFfFfF", 0x7fffffff},
                                               {"0x7fffffffffffffff", 0x7fffffffffffffffll},
-                                              {"-0x7fffffffffffffff", -0x7fffffffffffffffll},
                                           })));
 
 INSTANTIATE_TEST_SUITE_P(Hex_u32,
@@ -869,22 +831,13 @@
                                           testing::ValuesIn(std::vector<ParseIntegerCase>{
                                               {"0x0i", 0},
                                               {"0x42i", 66},
-                                              {"-0x0i", 0},
-                                              {"-0x42i", -66},
                                               {"0xeF1Abc9i", 250719177},
-                                              {"-0xeF1Abc9i", -250719177},
                                               {"0x7FFFFFFFi", 0x7fffffff},
-                                              {"-0x7FFFFFFFi", -0x7fffffff},
                                               {"0X7FFFFFFFi", 0x7fffffff},
-                                              {"-0X7FFFFFFFi", -0x7fffffff},
                                               {"0x7fffffffi", 0x7fffffff},
-                                              {"-0x7fffffffi", -0x7fffffff},
                                               {"0X7fffffffi", 0x7fffffff},
-                                              {"-0X7fffffffi", -0x7fffffff},
                                               {"0x7FfFfFfFi", 0x7fffffff},
-                                              {"-0x7FfFfFfFi", -0x7fffffff},
                                               {"0X7FfFfFfFi", 0x7fffffff},
-                                              {"-0X7FfFfFfFi", -0x7fffffff},
                                           })));
 ////////////////////////////////////////////////////////////////////////////////
 // ParseIntegerTest_CannotBeRepresented
@@ -920,9 +873,8 @@
 
 INSTANTIATE_TEST_SUITE_P(u32,
                          ParseIntegerTest_CannotBeRepresented,
-                         testing::Combine(testing::Values("u32"),         // type
-                                          testing::Values("4294967296u",  //
-                                                          "-1u")));
+                         testing::Combine(testing::Values("u32"),  // type
+                                          testing::Values("4294967296u")));
 
 ////////////////////////////////////////////////////////////////////////////////
 // ParseIntegerTest_LeadingZeros
@@ -942,7 +894,7 @@
 
 INSTANTIATE_TEST_SUITE_P(LeadingZero,
                          ParseIntegerTest_LeadingZeros,
-                         testing::Values("01234", "0000", "-00", "00u"));
+                         testing::Values("01234", "0000", "00u"));
 
 ////////////////////////////////////////////////////////////////////////////////
 // ParseIntegerTest_NoSignificantDigits
@@ -962,18 +914,7 @@
 
 INSTANTIATE_TEST_SUITE_P(LeadingZero,
                          ParseIntegerTest_NoSignificantDigits,
-                         testing::Values("0x",
-                                         "0X",
-                                         "-0x",
-                                         "-0X",
-                                         "0xu",
-                                         "0Xu",
-                                         "-0xu",
-                                         "-0Xu",
-                                         "0xi",
-                                         "0Xi",
-                                         "-0xi",
-                                         "-0Xi"));
+                         testing::Values("0x", "0X", "0xu", "0Xu", "0xi", "0Xi"));
 
 struct TokenData {
     const char* input;
diff --git a/src/tint/reader/wgsl/parser_impl_argument_expression_list_test.cc b/src/tint/reader/wgsl/parser_impl_argument_expression_list_test.cc
index 7f1132c..e22a706 100644
--- a/src/tint/reader/wgsl/parser_impl_argument_expression_list_test.cc
+++ b/src/tint/reader/wgsl/parser_impl_argument_expression_list_test.cc
@@ -37,7 +37,7 @@
 }
 
 TEST_F(ParserImplTest, ArgumentExpressionList_ParsesMultiple) {
-    auto p = parser("(a, -33, 1+2)");
+    auto p = parser("(a, 33, 1+2)");
     auto e = p->expect_argument_expression_list("argument list");
     ASSERT_FALSE(p->has_error()) << p->error();
     ASSERT_FALSE(e.errored);
diff --git a/src/tint/reader/wgsl/parser_impl_const_literal_test.cc b/src/tint/reader/wgsl/parser_impl_const_literal_test.cc
index 16861e4..af7b38e 100644
--- a/src/tint/reader/wgsl/parser_impl_const_literal_test.cc
+++ b/src/tint/reader/wgsl/parser_impl_const_literal_test.cc
@@ -67,32 +67,6 @@
                   ast::IntLiteralExpression::Suffix::kI);
         EXPECT_EQ(c->source.range, (Source::Range{{1u, 1u}, {1u, 5u}}));
     }
-    {
-        auto p = parser("-234");
-        auto c = p->const_literal();
-        EXPECT_TRUE(c.matched);
-        EXPECT_FALSE(c.errored);
-        EXPECT_FALSE(p->has_error()) << p->error();
-        ASSERT_NE(c.value, nullptr);
-        ASSERT_TRUE(c->Is<ast::IntLiteralExpression>());
-        EXPECT_EQ(c->As<ast::IntLiteralExpression>()->value, -234);
-        EXPECT_EQ(c->As<ast::IntLiteralExpression>()->suffix,
-                  ast::IntLiteralExpression::Suffix::kNone);
-        EXPECT_EQ(c->source.range, (Source::Range{{1u, 1u}, {1u, 5u}}));
-    }
-    {
-        auto p = parser("-234i");
-        auto c = p->const_literal();
-        EXPECT_TRUE(c.matched);
-        EXPECT_FALSE(c.errored);
-        EXPECT_FALSE(p->has_error()) << p->error();
-        ASSERT_NE(c.value, nullptr);
-        ASSERT_TRUE(c->Is<ast::IntLiteralExpression>());
-        EXPECT_EQ(c->As<ast::IntLiteralExpression>()->value, -234);
-        EXPECT_EQ(c->As<ast::IntLiteralExpression>()->suffix,
-                  ast::IntLiteralExpression::Suffix::kI);
-        EXPECT_EQ(c->source.range, (Source::Range{{1u, 1u}, {1u, 6u}}));
-    }
 }
 
 TEST_F(ParserImplTest, ConstLiteral_Uint) {
@@ -108,15 +82,6 @@
     EXPECT_EQ(c->source.range, (Source::Range{{1u, 1u}, {1u, 5u}}));
 }
 
-TEST_F(ParserImplTest, ConstLiteral_Uint_Negative) {
-    auto p = parser("-234u");
-    auto c = p->const_literal();
-    EXPECT_FALSE(c.matched);
-    EXPECT_TRUE(c.errored);
-    EXPECT_EQ(p->error(), "1:1: value cannot be represented as 'u32'");
-    ASSERT_EQ(c.value, nullptr);
-}
-
 TEST_F(ParserImplTest, ConstLiteral_InvalidFloat_IncompleteExponent) {
     auto p = parser("1.0e+");
     auto c = p->const_literal();
@@ -174,15 +139,11 @@
 INSTANTIATE_TEST_SUITE_P(ParserImplFloatLiteralTest_Float,
                          ParserImplFloatLiteralTest,
                          testing::ValuesIn(FloatLiteralTestCaseList{
-                             {"0.0", 0.0},                        // Zero
-                             {"1.0", 1.0},                        // One
-                             {"-1.0", -1.0},                      // MinusOne
-                             {"1000000000.0", 1e9},               // Billion
-                             {"-0.0", std::copysign(0.0, -5.0)},  // NegativeZero
-                             {"0.0", MakeDouble(0, 0, 0)},        // Zero
-                             {"-0.0", MakeDouble(1, 0, 0)},       // NegativeZero
-                             {"1.0", MakeDouble(0, 1023, 0)},     // One
-                             {"-1.0", MakeDouble(1, 1023, 0)},    // NegativeOne
+                             {"0.0", 0.0},                     // Zero
+                             {"1.0", 1.0},                     // One
+                             {"1000000000.0", 1e9},            // Billion
+                             {"0.0", MakeDouble(0, 0, 0)},     // Zero
+                             {"1.0", MakeDouble(0, 1023, 0)},  // One
 
                              {"234.e12", 234.e12},
                              {"234.e12f", static_cast<double>(234.e12f)},
@@ -190,47 +151,29 @@
 
                              // Tiny cases
                              {"1e-5000", 0.0},
-                             {"-1e-5000", 0.0},
                              {"1e-5000f", 0.0},
-                             {"-1e-5000f", 0.0},
                              {"1e-50f", 0.0},
-                             {"-1e-50f", 0.0},
                              {"1e-5000h", 0.0},
-                             {"-1e-5000h", 0.0},
                              {"1e-50h", 0.0},
-                             {"-1e-50h", 0.0},
                              {"1e-8h", 0.0},  // The smallest positive subnormal f16 is 5.96e-8
-                             {"-1e-8h", 0.0},
 
                              // Nearly overflow
                              {"1.e308", 1.e308},
-                             {"-1.e308", -1.e308},
                              {"1.8e307", 1.8e307},
-                             {"-1.8e307", -1.8e307},
                              {"1.798e307", 1.798e307},
-                             {"-1.798e307", -1.798e307},
                              {"1.7977e307", 1.7977e307},
-                             {"-1.7977e307", -1.7977e307},
 
                              // Nearly overflow
                              {"1e38f", static_cast<double>(1e38f)},
-                             {"-1e38f", static_cast<double>(-1e38f)},
                              {"4.0e37f", static_cast<double>(4.0e37f)},
-                             {"-4.0e37f", static_cast<double>(-4.0e37f)},
                              {"3.5e37f", static_cast<double>(3.5e37f)},
-                             {"-3.5e37f", static_cast<double>(-3.5e37f)},
                              {"3.403e37f", static_cast<double>(3.403e37f)},
-                             {"-3.403e37f", static_cast<double>(-3.403e37f)},
 
                              // Nearly overflow
                              {"6e4h", 6e4},
-                             {"-6e4h", -6e4},
                              {"8.0e3h", 8.0e3},
-                             {"-8.0e3h", -8.0e3},
                              {"3.5e3h", 3.5e3},
-                             {"-3.5e3h", -3.5e3},
-                             {"3.403e3h", 3.402e3},    // Quantized
-                             {"-3.403e3h", -3.402e3},  // Quantized
+                             {"3.403e3h", 3.402e3},  // Quantized
                          }));
 
 const double NegInf = MakeDouble(1, 0x7FF, 0);
@@ -246,11 +189,6 @@
         {"0x1p-1", 0x1p-1},
         {"0x1p-2", 0x1p-2},
         {"0x1.8p-1", 0x1.8p-1},
-        {"-0x0p+0", -0x0p+0},
-        {"-0x1p+0", -0x1p+0},
-        {"-0x1p-1", -0x1p-1},
-        {"-0x1p-2", -0x1p-2},
-        {"-0x1.8p-1", -0x1.8p-1},
         {"0x0.4p+1", 0x0.4p+1},
         {"0x0.02p+3", 0x0.02p+3},
         {"0x4.4p+1", 0x4.4p+1},
@@ -260,43 +198,28 @@
         {"0x1p+9", 0x1p+9},
         {"0x1p+10", 0x1p+10},
         {"0x1.02p+10", 0x1.02p+10},
-        {"-0x1p+9", -0x1p+9},
-        {"-0x1p+10", -0x1p+10},
-        {"-0x1.02p+10", -0x1.02p+10},
 
         // Small numbers
         {"0x1p-9", 0x1p-9},
         {"0x1p-10", 0x1p-10},
         {"0x1.02p-3", 0x1.02p-3},
-        {"-0x1p-9", -0x1p-9},
-        {"-0x1p-10", -0x1p-10},
-        {"-0x1.02p-3", -0x1.02p-3},
 
         // Near lowest non-denorm
         {"0x1p-1020", 0x1p-1020},
         {"0x1p-1021", 0x1p-1021},
-        {"-0x1p-1020", -0x1p-1020},
-        {"-0x1p-1021", -0x1p-1021},
 
         {"0x1p-124f", 0x1p-124},
         {"0x1p-125f", 0x1p-125},
-        {"-0x1p-124f", -0x1p-124},
-        {"-0x1p-125f", -0x1p-125},
 
         {"0x1p-12h", 0x1p-12},
         {"0x1p-13h", 0x1p-13},
-        {"-0x1p-12h", -0x1p-12},
-        {"-0x1p-13h", -0x1p-13},
 
         // Lowest non-denorm
         {"0x1p-1022", 0x1p-1022},
-        {"-0x1p-1022", -0x1p-1022},
 
         {"0x1p-126f", 0x1p-126},
-        {"-0x1p-126f", -0x1p-126},
 
         {"0x1p-14h", 0x1p-14},
-        {"-0x1p-14h", -0x1p-14},
 
         // Denormalized values
         {"0x1p-1023", 0x1p-1023},
@@ -305,10 +228,6 @@
         {"0x0.2p-1021", 0x0.2p-1021},
         {"0x1p-1025", 0x1p-1025},
         {"0x1p-1026", 0x1p-1026},
-        {"-0x1p-1023", -0x1p-1023},
-        {"-0x1p-1024", -0x1p-1024},
-        {"-0x1p-1025", -0x1p-1025},
-        {"-0x1p-1026", -0x1p-1026},
         {"0x1.8p-1023", 0x1.8p-1023},
         {"0x1.8p-1024", 0x1.8p-1024},
 
@@ -318,10 +237,6 @@
         {"0x0.2p-125f", 0x0.2p-125},
         {"0x1p-129f", 0x1p-129},
         {"0x1p-130f", 0x1p-130},
-        {"-0x1p-127f", -0x1p-127},
-        {"-0x1p-128f", -0x1p-128},
-        {"-0x1p-129f", -0x1p-129},
-        {"-0x1p-130f", -0x1p-130},
         {"0x1.8p-127f", 0x1.8p-127},
         {"0x1.8p-128f", 0x1.8p-128},
 
@@ -331,52 +246,31 @@
         {"0x0.2p-13h", 0x0.2p-13},
         {"0x1p-17h", 0x1p-17},
         {"0x1p-18h", 0x1p-18},
-        {"-0x1p-15h", -0x1p-15},
-        {"-0x1p-16h", -0x1p-16},
-        {"-0x1p-17h", -0x1p-17},
-        {"-0x1p-18h", -0x1p-18},
         {"0x1.8p-15h", 0x1.8p-15},
         {"0x1.8p-16h", 0x1.8p-16},
 
         // F64 extremities
-        {"0x1p-1074", 0x1p-1074},                                // +SmallestDenormal
-        {"0x1p-1073", 0x1p-1073},                                // +BiggerDenormal
-        {"0x1.ffffffffffffep-1023", 0x1.ffffffffffffep-1023},    // +LargestDenormal
-        {"0x0.fffffffffffffp-1022", 0x0.fffffffffffffp-1022},    // +LargestDenormal
-        {"-0x1p-1074", -0x1p-1074},                              // -SmallestDenormal
-        {"-0x1p-1073", -0x1p-1073},                              // -BiggerDenormal
-        {"-0x1.ffffffffffffep-1023", -0x1.ffffffffffffep-1023},  // -LargestDenormal
-        {"-0x0.fffffffffffffp-1022", -0x0.fffffffffffffp-1022},  // -LargestDenormal
+        {"0x1p-1074", 0x1p-1074},                              // +SmallestDenormal
+        {"0x1p-1073", 0x1p-1073},                              // +BiggerDenormal
+        {"0x1.ffffffffffffep-1023", 0x1.ffffffffffffep-1023},  // +LargestDenormal
+        {"0x0.fffffffffffffp-1022", 0x0.fffffffffffffp-1022},  // +LargestDenormal
 
-        {"0x0.cafebeeff000dp-1022", 0x0.cafebeeff000dp-1022},    // +Subnormal
-        {"-0x0.cafebeeff000dp-1022", -0x0.cafebeeff000dp-1022},  // -Subnormal
-        {"0x1.2bfaf8p-1052", 0x1.2bfaf8p-1052},                  // +Subnormal
-        {"-0x1.2bfaf8p-1052", -0x1.2bfaf8p-1052},                // +Subnormal
-        {"0x1.55554p-1055", 0x1.55554p-1055},                    // +Subnormal
-        {"-0x1.55554p-1055", -0x1.55554p-1055},                  // -Subnormal
+        {"0x0.cafebeeff000dp-1022", 0x0.cafebeeff000dp-1022},  // +Subnormal
+        {"0x1.2bfaf8p-1052", 0x1.2bfaf8p-1052},                // +Subnormal
+        {"0x1.55554p-1055", 0x1.55554p-1055},                  // +Subnormal
         {"0x1.fffffffffffp-1027", 0x1.fffffffffffp-1027},  // +Subnormal, = 0x0.0fffffffffff8p-1022
-        {"-0x1.fffffffffffp-1027", -0x1.fffffffffffp-1027},  // -Subnormal
 
         // F32 extremities
-        {"0x1p-149f", 0x1p-149},                  // +SmallestDenormal
-        {"0x1p-148f", 0x1p-148},                  // +BiggerDenormal
-        {"0x1.fffffcp-127f", 0x1.fffffcp-127},    // +LargestDenormal
-        {"0x0.fffffep-126f", 0x0.fffffep-126},    // +LargestDenormal
-        {"0x1.0p-126f", 0x1.0p-126},              // +SmallestNormal
-        {"0x8.0p-129f", 0x8.0p-129},              // +SmallestNormal
-        {"-0x1p-149f", -0x1p-149},                // -SmallestDenormal
-        {"-0x1p-148f", -0x1p-148},                // -BiggerDenormal
-        {"-0x1.fffffcp-127f", -0x1.fffffcp-127},  // -LargestDenormal
-        {"-0x0.fffffep-126f", -0x0.fffffep-126},  // -LargestDenormal
-        {"-0x1.0p-126f", -0x1.0p-126},            // -SmallestNormal
-        {"-0x8.0p-129f", -0x8.0p-129},            // -SmallestNormal
+        {"0x1p-149f", 0x1p-149},                // +SmallestDenormal
+        {"0x1p-148f", 0x1p-148},                // +BiggerDenormal
+        {"0x1.fffffcp-127f", 0x1.fffffcp-127},  // +LargestDenormal
+        {"0x0.fffffep-126f", 0x0.fffffep-126},  // +LargestDenormal
+        {"0x1.0p-126f", 0x1.0p-126},            // +SmallestNormal
+        {"0x8.0p-129f", 0x8.0p-129},            // +SmallestNormal
 
-        {"0x0.cafebp-129f", 0x0.cafebp-129},      // +Subnormal
-        {"-0x0.cafebp-129f", -0x0.cafebp-129},    // -Subnormal
-        {"0x1.2bfaf8p-127f", 0x1.2bfaf8p-127},    // +Subnormal
-        {"-0x1.2bfaf8p-127f", -0x1.2bfaf8p-127},  // -Subnormal
-        {"0x1.55554p-130f", 0x1.55554p-130},      // +Subnormal
-        {"-0x1.55554p-130f", -0x1.55554p-130},    // -Subnormal
+        {"0x0.cafebp-129f", 0x0.cafebp-129},    // +Subnormal
+        {"0x1.2bfaf8p-127f", 0x1.2bfaf8p-127},  // +Subnormal
+        {"0x1.55554p-130f", 0x1.55554p-130},    // +Subnormal
 
         // F32 exactly representable
         {"0x1.000002p+0f", 0x1.000002p+0},
@@ -385,31 +279,20 @@
         {"0x8.00003p+0f", 0x8.00003p+0},
         {"0x2.123p+0f", 0x2.123p+0},
         {"0x2.cafefp+0f", 0x2.cafefp+0},
-        {"0x0.0000fep-126f", 0x0.0000fep-126},    // Subnormal
-        {"-0x0.0000fep-126f", -0x0.0000fep-126},  // Subnormal
-        {"0x3.f8p-144f", 0x3.f8p-144},            // Subnormal
-        {"-0x3.f8p-144f", -0x3.f8p-144},          // Subnormal
+        {"0x0.0000fep-126f", 0x0.0000fep-126},  // Subnormal
+        {"0x3.f8p-144f", 0x3.f8p-144},          // Subnormal
 
         // F16 extremities
-        {"0x1p-24h", 0x1p-24},            // +SmallestDenormal
-        {"0x1p-23h", 0x1p-23},            // +BiggerDenormal
-        {"0x1.ff8p-15h", 0x1.ff8p-15},    // +LargestDenormal
-        {"0x0.ffcp-14h", 0x0.ffcp-14},    // +LargestDenormal
-        {"0x1.0p-14h", 0x1.0p-14},        // +SmallestNormal
-        {"0x8.0p-17h", 0x8.0p-17},        // +SmallestNormal
-        {"-0x1p-24h", -0x1p-24},          // -SmallestDenormal
-        {"-0x1p-23h", -0x1p-23},          // -BiggerDenormal
-        {"-0x1.ff8p-15h", -0x1.ff8p-15},  // -LargestDenormal
-        {"-0x0.ffcp-14h", -0x0.ffcp-14},  // -LargestDenormal
-        {"-0x1.0p-14h", -0x1.0p-14},      // -SmallestNormal
-        {"-0x8.0p-17h", -0x8.0p-17},      // -SmallestNormal
+        {"0x1p-24h", 0x1p-24},          // +SmallestDenormal
+        {"0x1p-23h", 0x1p-23},          // +BiggerDenormal
+        {"0x1.ff8p-15h", 0x1.ff8p-15},  // +LargestDenormal
+        {"0x0.ffcp-14h", 0x0.ffcp-14},  // +LargestDenormal
+        {"0x1.0p-14h", 0x1.0p-14},      // +SmallestNormal
+        {"0x8.0p-17h", 0x8.0p-17},      // +SmallestNormal
 
-        {"0x0.a8p-19h", 0x0.a8p-19},    // +Subnormal
-        {"-0x0.a8p-19h", -0x0.a8p-19},  // -Subnormal
-        {"0x1.7ap-17h", 0x1.7ap-17},    // +Subnormal
-        {"-0x1.7ap-17h", -0x1.7ap-17},  // -Subnormal
-        {"0x1.dp-20h", 0x1.dp-20},      // +Subnormal
-        {"-0x1.dp-20h", -0x1.dp-20},    // -Subnormal
+        {"0x0.a8p-19h", 0x0.a8p-19},  // +Subnormal
+        {"0x1.7ap-17h", 0x1.7ap-17},  // +Subnormal
+        {"0x1.dp-20h", 0x1.dp-20},    // +Subnormal
 
         // F16 exactly representable
         {"0x1.004p+0h", 0x1.004p+0},
@@ -418,20 +301,14 @@
         {"0x8.06p+0h", 0x8.06p+0},
         {"0x2.128p+0h", 0x2.128p+0},
         {"0x2.ca8p+0h", 0x2.ca8p+0},
-        {"0x0.0fcp-14h", 0x0.0fcp-14},    // Subnormal
-        {"-0x0.0fcp-14h", -0x0.0fcp-14},  // Subnormal
-        {"0x3.f00p-20h", 0x3.f00p-20},    // Subnormal
-        {"-0x3.f00p-20h", -0x3.f00p-20},  // Subnormal
+        {"0x0.0fcp-14h", 0x0.0fcp-14},  // Subnormal
+        {"0x3.f00p-20h", 0x3.f00p-20},  // Subnormal
 
         // Underflow -> Zero
         {"0x1p-1075", 0.0},  // Exponent underflows
-        {"-0x1p-1075", 0.0},
         {"0x1p-5000", 0.0},
-        {"-0x1p-5000", 0.0},
         {"0x0.00000000000000000000001p-1022", 0.0},  // Fraction causes underflow
-        {"-0x0.0000000000000000000001p-1023", -0.0},
         {"0x0.01p-1073", -0.0},
-        {"-0x0.01p-1073", -0.0},  // Fraction causes additional underflow
 
         {"0x1.0p-9223372036854774784", 0},  // -(INT64_MAX - 1023) (smallest valid exponent)
 
@@ -443,22 +320,14 @@
         {"0x0p-9999999999", 0.0},
         // Same, but with very large positive exponents that would cause overflow
         // if the mantissa were non-zero.
-        {"0x0p+10000000000000000000", 0.0},    // 10 quintillion   (10,000,000,000,000,000,000)
-        {"0x0p+100000000000000000000", 0.0},   // 100 quintillion (100,000,000,000,000,000,000)
-        {"-0x0p+100000000000000000000", 0.0},  // As above 2, but negative mantissa
-        {"-0x0p+1000000000000000000000", 0.0},
+        {"0x0p+10000000000000000000", 0.0},     // 10 quintillion   (10,000,000,000,000,000,000)
+        {"0x0p+100000000000000000000", 0.0},    // 100 quintillion (100,000,000,000,000,000,000)
         {"0x0.00p+10000000000000000000", 0.0},  // As above 4, but with fractional part
         {"0x0.00p+100000000000000000000", 0.0},
-        {"-0x0.00p+100000000000000000000", 0.0},
-        {"-0x0.00p+1000000000000000000000", 0.0},
         {"0x0p-10000000000000000000", 0.0},  // As above 8, but with negative exponents
         {"0x0p-100000000000000000000", 0.0},
-        {"-0x0p-100000000000000000000", 0.0},
-        {"-0x0p-1000000000000000000000", 0.0},
         {"0x0.00p-10000000000000000000", 0.0},
         {"0x0.00p-100000000000000000000", 0.0},
-        {"-0x0.00p-100000000000000000000", 0.0},
-        {"-0x0.00p-1000000000000000000000", 0.0},
 
         // Test parsing
         {"0x0p0", 0.0},
@@ -476,37 +345,24 @@
         {"0x0.4p+1", 2 * 0.25},
         {"0x0.4p+2", 4 * 0.25},
         {"0x123Ep+1", 9340.0},
-        {"-0x123Ep+1", -9340.0},
         {"0x1a2b3cP12", 7.024656384e+09},
-        {"-0x1a2b3cP12", -7.024656384e+09},
 
         // Examples without a binary exponent part.
         {"0x1.", 1.0},
         {"0x.8", 0.5},
         {"0x1.8", 1.5},
-        {"-0x1.", -1.0},
-        {"-0x.8", -0.5},
-        {"-0x1.8", -1.5},
 
         // Examples with a binary exponent and a 'f' suffix.
         {"0x1.p0f", 1.0},
         {"0x.8p2f", 2.0},
         {"0x1.8p-1f", 0.75},
         {"0x2p-2f", 0.5},  // No binary point
-        {"-0x1.p0f", -1.0},
-        {"-0x.8p2f", -2.0},
-        {"-0x1.8p-1f", -0.75},
-        {"-0x2p-2f", -0.5},  // No binary point
 
         // Examples with a binary exponent and a 'h' suffix.
         {"0x1.p0h", 1.0},
         {"0x.8p2h", 2.0},
         {"0x1.8p-1h", 0.75},
         {"0x2p-2h", 0.5},  // No binary point
-        {"-0x1.p0h", -1.0},
-        {"-0x.8p2h", -2.0},
-        {"-0x1.8p-1h", -0.75},
-        {"-0x2p-2h", -0.5},  // No binary point
     };
 }
 INSTANTIATE_TEST_SUITE_P(ParserImplFloatLiteralTest_HexFloat,
@@ -532,11 +388,9 @@
 using UpperCase0XTest = ::testing::Test;
 TEST_F(UpperCase0XTest, Samples) {
     const auto cases = FloatLiteralTestCaseList{
-        {"absent", 0.0}, {"0x", 1.0},      {"0X", 2.0},      {"-0x", 3.0},
-        {"-0X", 4.0},    {"  0x1p1", 5.0}, {"  -0x1p", 6.0}, {" examine ", 7.0}};
+        {"absent", 0.0}, {"0x", 1.0}, {"0X", 2.0}, {"  0x1p1", 5.0}, {" examine ", 7.0}};
     const auto expected = FloatLiteralTestCaseList{
-        {"absent", 0.0}, {"0X", 1.0},      {"0X", 2.0},      {"-0X", 3.0},
-        {"-0X", 4.0},    {"  0X1p1", 5.0}, {"  -0X1p", 6.0}, {" examine ", 7.0}};
+        {"absent", 0.0}, {"0X", 1.0}, {"0X", 2.0}, {"  0X1p1", 5.0}, {" examine ", 7.0}};
 
     auto result = UpperCase0X(cases);
     EXPECT_THAT(result, ::testing::ElementsAreArray(expected));
@@ -625,11 +479,6 @@
                          "0x1.0018p+1024",
                          "0x1.01ep+1024",
                          "0x1.fffffep+1024",
-                         "-0x1.8p+1024",
-                         "-0x1.0002p+1024",
-                         "-0x1.0018p+1024",
-                         "-0x1.01ep+1024",
-                         "-0x1.fffffep+1024",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -642,11 +491,6 @@
                          "0x1.0018p+128f",
                          "0x1.01ep+128f",
                          "0x1.fffffep+128f",
-                         "-0x1.8p+128f",
-                         "-0x1.0002p+128f",
-                         "-0x1.0018p+128f",
-                         "-0x1.01ep+128f",
-                         "-0x1.fffffep+128f",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -659,11 +503,6 @@
                          "0x1.018p+16h",
                          "0x1.1ep+16h",
                          "0x1.ffcp+16h",
-                         "-0x1.8p+16h",
-                         "-0x1.004p+16h",
-                         "-0x1.018p+16h",
-                         "-0x1.1ep+16h",
-                         "-0x1.ffcp+16h",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -672,17 +511,11 @@
     testing::Combine(testing::Values("1:1: value cannot be represented as 'abstract-float'"),
                      testing::ValuesIn(std::vector<const char*>{
                          "0x1p+1024",
-                         "-0x1p+1024",
                          "0x1.1p+1024",
-                         "-0x1.1p+1024",
                          "0x1p+1025",
-                         "-0x1p+1025",
                          "0x32p+1023",
-                         "-0x32p+1023",
                          "0x32p+5000",
-                         "-0x32p+5000",
                          "0x1.0p9223372036854774784",
-                         "-0x1.0p9223372036854774784",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -691,15 +524,10 @@
     testing::Combine(testing::Values("1:1: value cannot be represented as 'f32'"),
                      testing::ValuesIn(std::vector<const char*>{
                          "0x1p+128f",
-                         "-0x1p+128f",
                          "0x1.1p+128f",
-                         "-0x1.1p+128f",
                          "0x1p+129f",
-                         "-0x1p+129f",
                          "0x32p+127f",
-                         "-0x32p+127f",
                          "0x32p+500f",
-                         "-0x32p+500f",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -708,15 +536,10 @@
     testing::Combine(testing::Values("1:1: value cannot be represented as 'f16'"),
                      testing::ValuesIn(std::vector<const char*>{
                          "0x1p+16h",
-                         "-0x1p+16h",
                          "0x1.1p+16h",
-                         "-0x1.1p+16h",
                          "0x1p+17h",
-                         "-0x1p+17h",
                          "0x32p+15h",
-                         "-0x32p+15h",
                          "0x32p+500h",
-                         "-0x32p+500h",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -724,32 +547,22 @@
     ParserImplInvalidLiteralTest,
     testing::Combine(testing::Values("1:1: value cannot be exactly represented as 'f32'"),
                      testing::ValuesIn(std::vector<const char*>{
-                         "0x1.000001p+0f",            // Quantizes to 0x1.0p+0
-                         "0x1.0000008p+0f",           // Quantizes to 0x1.0p+0
-                         "0x1.0000000000001p+0f",     // Quantizes to 0x1.0p+0
-                         "0x8.0000f8p+0f",            // Quantizes to 0x8.0000fp+0
-                         "0x8.000038p+0f",            // Quantizes to 0x8.00003p+0
-                         "0x2.cafef00dp+0f",          // Quantizes to 0x2.cafefp+0
-                         "0x0.0000ffp-126f",          // Subnormal, quantizes to 0x0.0000fep-126
-                         "0x3.fcp-144f",              // Subnormal, quantizes to 0x3.f8p-144
-                         "-0x0.0000ffp-126f",         // Subnormal, quantizes to -0x0.0000fep-126
-                         "-0x3.fcp-144f",             // Subnormal, quantizes to -0x3.f8p-144
-                         "0x0.ffffffp-126f",          // Subnormal, quantizes to 0x0.fffffep-144
-                         "0x0.fffffe0000001p-126f",   // Subnormal, quantizes to 0x0.fffffep-144
-                         "-0x0.ffffffp-126f",         // Subnormal, quantizes to -0x0.fffffep-144
-                         "-0x0.fffffe0000001p-126f",  // Subnormal, quantizes to -0x0.fffffep-144
-                         "0x1.8p-149f",               // Subnormal, quantizes to 0x1.0p-149f
-                         "0x1.4p-149f",               // Subnormal, quantizes to 0x1.0p-149f
-                         "0x1.000002p-149f",          // Subnormal, quantizes to 0x1.0p-149f
-                         "0x1.0000000000001p-149f",   // Subnormal, quantizes to 0x1.0p-149f
-                         "-0x1.8p-149f",              // Subnormal, quantizes to -0x1.0p-149f
-                         "-0x1.4p-149f",              // Subnormal, quantizes to -0x1.0p-149f
-                         "-0x1.000002p-149f",         // Subnormal, quantizes to -0x1.0p-149f
-                         "-0x1.0000000000001p-149f",  // Subnormal, quantizes to -0x1.0p-149f
-                         "0x1.0p-150f",   // Smaller than the smallest subnormal, quantizes to 0.0
-                         "0x1.8p-150f",   // Smaller than the smallest subnormal, quantizes to 0.0
-                         "-0x1.0p-150f",  // Smaller than the smallest subnormal, quantizes to -0.0
-                         "-0x1.8p-150f",  // Smaller than the smallest subnormal, quantizes to -0.0
+                         "0x1.000001p+0f",           // Quantizes to 0x1.0p+0
+                         "0x1.0000008p+0f",          // Quantizes to 0x1.0p+0
+                         "0x1.0000000000001p+0f",    // Quantizes to 0x1.0p+0
+                         "0x8.0000f8p+0f",           // Quantizes to 0x8.0000fp+0
+                         "0x8.000038p+0f",           // Quantizes to 0x8.00003p+0
+                         "0x2.cafef00dp+0f",         // Quantizes to 0x2.cafefp+0
+                         "0x0.0000ffp-126f",         // Subnormal, quantizes to 0x0.0000fep-126
+                         "0x3.fcp-144f",             // Subnormal, quantizes to 0x3.f8p-144
+                         "0x0.ffffffp-126f",         // Subnormal, quantizes to 0x0.fffffep-144
+                         "0x0.fffffe0000001p-126f",  // Subnormal, quantizes to 0x0.fffffep-144
+                         "0x1.8p-149f",              // Subnormal, quantizes to 0x1.0p-149f
+                         "0x1.4p-149f",              // Subnormal, quantizes to 0x1.0p-149f
+                         "0x1.000002p-149f",         // Subnormal, quantizes to 0x1.0p-149f
+                         "0x1.0000000000001p-149f",  // Subnormal, quantizes to 0x1.0p-149f
+                         "0x1.0p-150f",  // Smaller than the smallest subnormal, quantizes to 0.0
+                         "0x1.8p-150f",  // Smaller than the smallest subnormal, quantizes to 0.0
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -768,26 +581,15 @@
             "0x4.011p+0h",             // Quantizes to 0x4.01p+0
             "0x0.0fep-14h",            // Subnormal, quantizes to 0x0.0fcp-14
             "0x3.f8p-20h",             // Subnormal, quantizes to 0x3.f0p-20
-            "-0x0.0fep-14h",           // Subnormal, quantizes to -0x0.0fcp-14
-            "-0x3.f8p-20h",            // Subnormal, quantizes to -0x3.f0p-20
             "0x0.ffep-14h",            // Subnormal, quantizes to 0x0.ffcp-14
             "0x0.ffe0000000001p-14h",  // Subnormal, quantizes to 0x0.ffcp-14
             "0x0.fffffffffffffp-14h",  // Subnormal, quantizes to 0x0.ffcp-14
-            "-0x0.ffep-14h",           // Subnormal, quantizes to -0x0.ffcp-14
-            "-0x0.ffe0000000001p-14h",  // Subnormal, quantizes to -0x0.ffcp-14
-            "-0x0.fffffffffffffp-14h",  // Subnormal, quantizes to -0x0.ffcp-14
-            "0x1.8p-24h",               // Subnormal, quantizes to 0x1.0p-24f
-            "0x1.4p-24h",               // Subnormal, quantizes to 0x1.0p-24f
-            "0x1.004p-24h",             // Subnormal, quantizes to 0x1.0p-24f
-            "0x1.0000000000001p-24h",   // Subnormal, quantizes to 0x1.0p-24f
-            "-0x1.8p-24h",              // Subnormal, quantizes to -0x1.0p-24f
-            "-0x1.4p-24h",              // Subnormal, quantizes to -0x1.0p-24f
-            "-0x1.004p-24h",            // Subnormal, quantizes to -0x1.0p-24f
-            "-0x1.0000000000001p-24h",  // Subnormal, quantizes to -0x1.0p-24f
-            "0x1.0p-25h",               // Smaller than the smallest subnormal, quantizes to 0.0
-            "0x1.8p-25h",               // Smaller than the smallest subnormal, quantizes to 0.0
-            "-0x1.0p-25h",              // Smaller than the smallest subnormal, quantizes to -0.0
-            "-0x1.8p-25h",              // Smaller than the smallest subnormal, quantizes to -0.0
+            "0x1.8p-24h",              // Subnormal, quantizes to 0x1.0p-24f
+            "0x1.4p-24h",              // Subnormal, quantizes to 0x1.0p-24f
+            "0x1.004p-24h",            // Subnormal, quantizes to 0x1.0p-24f
+            "0x1.0000000000001p-24h",  // Subnormal, quantizes to 0x1.0p-24f
+            "0x1.0p-25h",              // Smaller than the smallest subnormal, quantizes to 0.0
+            "0x1.8p-25h",              // Smaller than the smallest subnormal, quantizes to 0.0
         })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -796,15 +598,10 @@
     testing::Combine(testing::Values("1:1: value cannot be represented as 'abstract-float'"),
                      testing::ValuesIn(std::vector<const char*>{
                          "1.e309",
-                         "-1.e309",
                          "1.8e308",
-                         "-1.8e308",
                          "1.798e308",
-                         "-1.798e308",
                          "1.7977e308",
-                         "-1.7977e308",
                          "1.2e+5000",
-                         "-1.2e+5000",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -813,15 +610,10 @@
     testing::Combine(testing::Values("1:1: value cannot be represented as 'f32'"),
                      testing::ValuesIn(std::vector<const char*>{
                          "1e39f",
-                         "-1e39f",
                          "4.0e38f",
-                         "-4.0e38f",
                          "3.5e38f",
-                         "-3.5e38f",
                          "3.403e38f",
-                         "-3.403e38f",
                          "1.2e+256f",
-                         "-1.2e+256f",
                      })));
 
 INSTANTIATE_TEST_SUITE_P(
@@ -830,17 +622,11 @@
     testing::Combine(testing::Values("1:1: value cannot be represented as 'f16'"),
                      testing::ValuesIn(std::vector<const char*>{
                          "1.0e5h",
-                         "-1.0e5h",
                          "7.0e4h",
-                         "-7.0e4h",
                          "6.6e4h",
-                         "-6.6e4h",
                          "6.56e4h",
-                         "-6.56e4h",
                          "6.554e4h",
-                         "-6.554e4h",
                          "1.2e+32h",
-                         "-1.2e+32h",
                      })));
 
 TEST_F(ParserImplTest, ConstLiteral_FloatHighest) {
@@ -863,29 +649,6 @@
     EXPECT_EQ(c->source.range, (Source::Range{{1u, 1u}, {1u, 42u}}));
 }
 
-TEST_F(ParserImplTest, ConstLiteral_FloatLowest) {
-    // Some compilers complain if you test floating point numbers for equality.
-    // So say it via two inequalities.
-    const auto lowest = std::numeric_limits<float>::lowest();
-    const auto expected_lowest = -340282346638528859811704183484516925440.0f;
-    if (lowest < expected_lowest || lowest > expected_lowest) {
-        GTEST_SKIP() << "std::numeric_limits<float>::lowest() is not as expected for "
-                        "this target";
-    }
-
-    auto p = parser("-340282346638528859811704183484516925440.0");
-    auto c = p->const_literal();
-    EXPECT_TRUE(c.matched);
-    EXPECT_FALSE(c.errored);
-    EXPECT_FALSE(p->has_error()) << p->error();
-    ASSERT_NE(c.value, nullptr);
-    ASSERT_TRUE(c->Is<ast::FloatLiteralExpression>());
-    EXPECT_EQ(c->As<ast::FloatLiteralExpression>()->value, std::numeric_limits<float>::lowest());
-    EXPECT_EQ(c->As<ast::FloatLiteralExpression>()->suffix,
-              ast::FloatLiteralExpression::Suffix::kNone);
-    EXPECT_EQ(c->source.range, (Source::Range{{1u, 1u}, {1u, 43u}}));
-}
-
 TEST_F(ParserImplTest, ConstLiteral_True) {
     auto p = parser("true");
     auto c = p->const_literal();
diff --git a/src/tint/reader/wgsl/parser_impl_expression_test.cc b/src/tint/reader/wgsl/parser_impl_expression_test.cc
index 389999f..71d1d99 100644
--- a/src/tint/reader/wgsl/parser_impl_expression_test.cc
+++ b/src/tint/reader/wgsl/parser_impl_expression_test.cc
@@ -269,6 +269,124 @@
     EXPECT_EQ(p->error(), R"(1:7: mixing '&&' and '||' requires parenthesis)");
 }
 
+TEST_F(ParserImplTest, Expression_SubtractionNoSpace) {
+    auto p = parser("(2-1)");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+    ASSERT_TRUE(e->Is<ast::BinaryExpression>());
+    auto* b = e->As<ast::BinaryExpression>();
+    EXPECT_TRUE(b->IsSubtract());
+
+    ASSERT_TRUE(b->lhs->Is<ast::IntLiteralExpression>());
+    ASSERT_TRUE(b->rhs->Is<ast::IntLiteralExpression>());
+
+    EXPECT_EQ(b->lhs->As<ast::IntLiteralExpression>()->value, 2);
+    EXPECT_EQ(b->rhs->As<ast::IntLiteralExpression>()->value, 1);
+}
+
+TEST_F(ParserImplTest, Expression_NegatedNumber) {
+    auto p = parser("-1");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+
+    ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
+    auto* b = e->As<ast::UnaryOpExpression>();
+    EXPECT_EQ(b->op, ast::UnaryOp::kNegation);
+
+    ASSERT_TRUE(b->expr->Is<ast::IntLiteralExpression>());
+    EXPECT_EQ(b->expr->As<ast::IntLiteralExpression>()->value, 1);
+}
+
+TEST_F(ParserImplTest, Expression_MaxI32) {
+    auto p = parser("2147483647");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+
+    ASSERT_TRUE(e->Is<ast::IntLiteralExpression>());
+    EXPECT_EQ(e->As<ast::IntLiteralExpression>()->value, 2147483647);
+}
+
+TEST_F(ParserImplTest, Expression_MinI32) {
+    auto p = parser("-2147483648");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+
+    ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
+    auto* b = e->As<ast::UnaryOpExpression>();
+    EXPECT_EQ(b->op, ast::UnaryOp::kNegation);
+
+    ASSERT_TRUE(b->expr->Is<ast::IntLiteralExpression>());
+    EXPECT_EQ(b->expr->As<ast::IntLiteralExpression>()->value, 2147483648);
+}
+
+TEST_F(ParserImplTest, Expression_MaxU32) {
+    auto p = parser("4294967295");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+
+    ASSERT_TRUE(e->Is<ast::IntLiteralExpression>());
+    EXPECT_EQ(e->As<ast::IntLiteralExpression>()->value, 4294967295);
+}
+
+TEST_F(ParserImplTest, Expression_MaxF32) {
+    const auto highest = std::numeric_limits<float>::max();
+    const auto expected_highest = 340282346638528859811704183484516925440.0f;
+    if (highest < expected_highest || highest > expected_highest) {
+        GTEST_SKIP() << "std::numeric_limits<float>::max() is not as expected for "
+                        "this target";
+    }
+
+    auto p = parser("340282346638528859811704183484516925440.0f");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+
+    ASSERT_TRUE(e->Is<ast::FloatLiteralExpression>());
+    EXPECT_EQ(e->As<ast::FloatLiteralExpression>()->value,
+              340282346638528859811704183484516925440.0f);
+}
+
+TEST_F(ParserImplTest, Expression_MinF32) {
+    const auto lowest = std::numeric_limits<float>::lowest();
+    const auto expected_lowest = -340282346638528859811704183484516925440.0f;
+    if (lowest < expected_lowest || lowest > expected_lowest) {
+        GTEST_SKIP() << "std::numeric_limits<float>::lowest() is not as expected for "
+                        "this target";
+    }
+
+    auto p = parser("-340282346638528859811704183484516925440.0f");
+    auto e = p->expression();
+    EXPECT_TRUE(e.matched);
+    EXPECT_FALSE(e.errored);
+    EXPECT_FALSE(p->has_error()) << p->error();
+    ASSERT_NE(e.value, nullptr);
+
+    ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
+    auto* b = e->As<ast::UnaryOpExpression>();
+    EXPECT_EQ(b->op, ast::UnaryOp::kNegation);
+
+    ASSERT_TRUE(b->expr->Is<ast::FloatLiteralExpression>());
+    EXPECT_EQ(b->expr->As<ast::FloatLiteralExpression>()->value,
+              340282346638528859811704183484516925440.0f);
+}
+
 namespace mixing_binary_ops {
 
 struct BinaryOperatorInfo {
diff --git a/src/tint/resolver/validation_test.cc b/src/tint/resolver/validation_test.cc
index d784971..34ddd90 100644
--- a/src/tint/resolver/validation_test.cc
+++ b/src/tint/resolver/validation_test.cc
@@ -1405,6 +1405,27 @@
     EXPECT_EQ(r()->error(), "12:34 error: type is not constructible");
 }
 
+TEST_F(ResolverTest, I32_Overflow) {
+    GlobalVar("v", ty.i32(), ast::AddressSpace::kPrivate, Expr(Source{{12, 24}}, 2147483648_a));
+
+    EXPECT_FALSE(r()->Resolve());
+    EXPECT_EQ(r()->error(), "12:24 error: value 2147483648 cannot be represented as 'i32'");
+}
+
+TEST_F(ResolverTest, I32_Underflow) {
+    GlobalVar("v", ty.i32(), ast::AddressSpace::kPrivate, Expr(Source{{12, 24}}, -2147483649_a));
+
+    EXPECT_FALSE(r()->Resolve());
+    EXPECT_EQ(r()->error(), "12:24 error: value -2147483649 cannot be represented as 'i32'");
+}
+
+TEST_F(ResolverTest, U32_Overflow) {
+    GlobalVar("v", ty.u32(), ast::AddressSpace::kPrivate, Expr(Source{{12, 24}}, 4294967296_a));
+
+    EXPECT_FALSE(r()->Resolve());
+    EXPECT_EQ(r()->error(), "12:24 error: value 4294967296 cannot be represented as 'u32'");
+}
+
 }  // namespace
 }  // namespace tint::resolver
 
diff --git a/test/tint/bug/chromium/1372963.wgsl.expected.wgsl b/test/tint/bug/chromium/1372963.wgsl.expected.wgsl
index 955d6c6..58397f6 100644
--- a/test/tint/bug/chromium/1372963.wgsl.expected.wgsl
+++ b/test/tint/bug/chromium/1372963.wgsl.expected.wgsl
@@ -1,5 +1,5 @@
 fn g() -> vec4<i32> {
-  return (vec4(0) << vec4(2147483649));
+  return (vec4(-(0)) << vec4(2147483649));
 }
 
 @fragment
diff --git a/test/tint/bug/dawn/947.wgsl.expected.wgsl b/test/tint/bug/dawn/947.wgsl.expected.wgsl
index c1712ae..98ea244 100644
--- a/test/tint/bug/dawn/947.wgsl.expected.wgsl
+++ b/test/tint/bug/dawn/947.wgsl.expected.wgsl
@@ -14,14 +14,14 @@
 
 @vertex
 fn vs_main(@builtin(vertex_index) VertexIndex : u32) -> VertexOutputs {
-  var texcoord = array<vec2<f32>, 3>(vec2<f32>(-0.5, 0.0), vec2<f32>(1.5, 0.0), vec2<f32>(0.5, 2.0));
+  var texcoord = array<vec2<f32>, 3>(vec2<f32>(-(0.5), 0.0), vec2<f32>(1.5, 0.0), vec2<f32>(0.5, 2.0));
   var output : VertexOutputs;
   output.position = vec4<f32>(((texcoord[VertexIndex] * 2.0) - vec2<f32>(1.0, 1.0)), 0.0, 1.0);
   var flipY = (uniforms.u_scale.y < 0.0);
   if (flipY) {
-    output.texcoords = ((((texcoord[VertexIndex] * uniforms.u_scale) + uniforms.u_offset) * vec2<f32>(1.0, -1.0)) + vec2<f32>(0.0, 1.0));
+    output.texcoords = ((((texcoord[VertexIndex] * uniforms.u_scale) + uniforms.u_offset) * vec2<f32>(1.0, -(1.0))) + vec2<f32>(0.0, 1.0));
   } else {
-    output.texcoords = ((((texcoord[VertexIndex] * vec2<f32>(1.0, -1.0)) + vec2<f32>(0.0, 1.0)) * uniforms.u_scale) + uniforms.u_offset);
+    output.texcoords = ((((texcoord[VertexIndex] * vec2<f32>(1.0, -(1.0))) + vec2<f32>(0.0, 1.0)) * uniforms.u_scale) + uniforms.u_offset);
   }
   return output;
 }
diff --git a/test/tint/bug/tint/1113.wgsl.expected.wgsl b/test/tint/bug/tint/1113.wgsl.expected.wgsl
index 1d69ccd..f1f3077 100644
--- a/test/tint/bug/tint/1113.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/1113.wgsl.expected.wgsl
@@ -126,7 +126,7 @@
     return;
   }
   var numTriangles = atomicLoad(&(counters.values[voxelIndex]));
-  var offset = -1;
+  var offset = -(1);
   if ((numTriangles > 0u)) {
     offset = i32(atomicAdd(&(dbg.offsetCounter), numTriangles));
   }
diff --git a/test/tint/bug/tint/1121.wgsl.expected.wgsl b/test/tint/bug/tint/1121.wgsl.expected.wgsl
index 6156c87..4e5bd4a 100644
--- a/test/tint/bug/tint/1121.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/1121.wgsl.expected.wgsl
@@ -53,7 +53,7 @@
     lightsBuffer.lights[index].position.y = uniforms.max.y;
   }
   var M : mat4x4<f32> = uniforms.projectionMatrix;
-  var viewNear : f32 = (-(M[3][2]) / (-1.0 + M[2][2]));
+  var viewNear : f32 = (-(M[3][2]) / (-(1.0) + M[2][2]));
   var viewFar : f32 = (-(M[3][2]) / (1.0 + M[2][2]));
   var lightPos = lightsBuffer.lights[index].position;
   lightPos = (uniforms.viewMatrix * lightPos);
@@ -62,7 +62,7 @@
   var boxMin : vec4<f32> = (lightPos - vec4<f32>(vec3<f32>(lightRadius), 0.0));
   var boxMax : vec4<f32> = (lightPos + vec4<f32>(vec3<f32>(lightRadius), 0.0));
   var frustumPlanes : array<vec4<f32>, 6>;
-  frustumPlanes[4] = vec4<f32>(0.0, 0.0, -1.0, viewNear);
+  frustumPlanes[4] = vec4<f32>(0.0, 0.0, -(1.0), viewNear);
   frustumPlanes[5] = vec4<f32>(0.0, 0.0, 1.0, -(viewFar));
   let TILE_SIZE : i32 = 16;
   let TILE_COUNT_X : i32 = 2;
@@ -75,9 +75,9 @@
       var viewFloorCoord : vec2<f32> = vec2<f32>((((-(viewNear) * floorCoord.x) - (M[2][0] * viewNear)) / M[0][0]), (((-(viewNear) * floorCoord.y) - (M[2][1] * viewNear)) / M[1][1]));
       var viewCeilCoord : vec2<f32> = vec2<f32>((((-(viewNear) * ceilCoord.x) - (M[2][0] * viewNear)) / M[0][0]), (((-(viewNear) * ceilCoord.y) - (M[2][1] * viewNear)) / M[1][1]));
       frustumPlanes[0] = vec4<f32>(1.0, 0.0, (-(viewFloorCoord.x) / viewNear), 0.0);
-      frustumPlanes[1] = vec4<f32>(-1.0, 0.0, (viewCeilCoord.x / viewNear), 0.0);
+      frustumPlanes[1] = vec4<f32>(-(1.0), 0.0, (viewCeilCoord.x / viewNear), 0.0);
       frustumPlanes[2] = vec4<f32>(0.0, 1.0, (-(viewFloorCoord.y) / viewNear), 0.0);
-      frustumPlanes[3] = vec4<f32>(0.0, -1.0, (viewCeilCoord.y / viewNear), 0.0);
+      frustumPlanes[3] = vec4<f32>(0.0, -(1.0), (viewCeilCoord.y / viewNear), 0.0);
       var dp : f32 = 0.0;
       for(var i : u32 = 0u; (i < 6u); i = (i + 1u)) {
         var p : vec4<f32>;
diff --git a/test/tint/bug/tint/1605.wgsl.expected.wgsl b/test/tint/bug/tint/1605.wgsl.expected.wgsl
index d7024ec..942b1dc 100644
--- a/test/tint/bug/tint/1605.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/1605.wgsl.expected.wgsl
@@ -2,7 +2,7 @@
 
 fn func_3() -> bool {
   for(var i = 0; (i < b); i++) {
-    for(var j = -1; (j == 1); j++) {
+    for(var j = -(1); (j == 1); j++) {
       return false;
     }
   }
diff --git a/test/tint/bug/tint/1664.wgsl.expected.wgsl b/test/tint/bug/tint/1664.wgsl.expected.wgsl
index a6442d7..50d9f78 100644
--- a/test/tint/bug/tint/1664.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/1664.wgsl.expected.wgsl
@@ -7,5 +7,5 @@
 
 fn f1() {
   let a = 1;
-  let b = (-2147483648 - a);
+  let b = (-(2147483648) - a);
 }
diff --git a/test/tint/bug/tint/1666.wgsl.expected.wgsl b/test/tint/bug/tint/1666.wgsl.expected.wgsl
index e6f5a2a..30ae5d4 100644
--- a/test/tint/bug/tint/1666.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/1666.wgsl.expected.wgsl
@@ -17,7 +17,7 @@
 @group(0) @binding(0) var<storage> rarr : array<f32>;
 
 fn runtime_size_array() {
-  let idx = -1;
+  let idx = -(1);
   let x = rarr[idx];
 }
 
diff --git a/test/tint/bug/tint/1703.wgsl.expected.wgsl b/test/tint/bug/tint/1703.wgsl.expected.wgsl
index 0692fef..7ec273e 100644
--- a/test/tint/bug/tint/1703.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/1703.wgsl.expected.wgsl
@@ -9,8 +9,8 @@
 fn foo_member_initialize() {
   var vb2 : vec2<bool>;
   vb2.x = (my_global.z != 0);
-  vb2.x = (my_uniform == -1.0f);
-  vb2 = vec2((my_uniform == -1.0f), false);
+  vb2.x = (my_uniform == -(1.0f));
+  vb2 = vec2((my_uniform == -(1.0f)), false);
   if (vb2.x) {
     let r : vec4<f32> = textureSampleBias(my_texture, my_sampler, vec2<f32>(), 0.0);
   }
@@ -19,7 +19,7 @@
 fn foo_default_initialize() {
   var vb2 : vec2<bool>;
   vb2.x = (my_global.z != 0);
-  vb2.x = (my_uniform == -1.0f);
+  vb2.x = (my_uniform == -(1.0f));
   vb2 = vec2<bool>();
   if (vb2.x) {
     let r : vec4<f32> = textureSampleBias(my_texture, my_sampler, vec2<f32>(), 0.0);
diff --git a/test/tint/bug/tint/403.wgsl.expected.wgsl b/test/tint/bug/tint/403.wgsl.expected.wgsl
index a889483..67daff7 100644
--- a/test/tint/bug/tint/403.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/403.wgsl.expected.wgsl
@@ -16,7 +16,7 @@
   let x_23 : mat2x2<f32> = x_20.transform1;
   let x_28 : mat2x2<f32> = x_26.transform2;
   let x_46 : u32 = gl_VertexIndex;
-  indexable = array<vec2<f32>, 3>(vec2<f32>(-1.0, 1.0), vec2<f32>(1.0, 1.0), vec2<f32>(-1.0, -1.0));
+  indexable = array<vec2<f32>, 3>(vec2<f32>(-(1.0), 1.0), vec2<f32>(1.0, 1.0), vec2<f32>(-(1.0), -(1.0)));
   let x_51 : vec2<f32> = indexable[x_46];
   let x_52 : vec2<f32> = (mat2x2<f32>((x_23[0u] + x_28[0u]), (x_23[1u] + x_28[1u])) * x_51);
   return vec4<f32>(x_52.x, x_52.y, 0.0, 1.0);
diff --git a/test/tint/bug/tint/824.wgsl.expected.wgsl b/test/tint/bug/tint/824.wgsl.expected.wgsl
index 364a771..929857f 100644
--- a/test/tint/bug/tint/824.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/824.wgsl.expected.wgsl
@@ -7,7 +7,7 @@
 
 @vertex
 fn main(@builtin(vertex_index) VertexIndex : u32, @builtin(instance_index) InstanceIndex : u32) -> Output {
-  let zv : array<vec2<f32>, 4> = array<vec2<f32>, 4>(vec2<f32>(0.2, 0.2), vec2<f32>(0.3, 0.3), vec2<f32>(-0.1, -0.1), vec2<f32>(1.1, 1.1));
+  let zv : array<vec2<f32>, 4> = array<vec2<f32>, 4>(vec2<f32>(0.2, 0.2), vec2<f32>(0.3, 0.3), vec2<f32>(-(0.1), -(0.1)), vec2<f32>(1.1, 1.1));
   let z : f32 = zv[InstanceIndex].x;
   var output : Output;
   output.Position = vec4<f32>(0.5, 0.5, z, 1.0);
diff --git a/test/tint/bug/tint/949.wgsl.expected.wgsl b/test/tint/bug/tint/949.wgsl.expected.wgsl
index 710e144..861a573 100644
--- a/test/tint/bug/tint/949.wgsl.expected.wgsl
+++ b/test/tint/bug/tint/949.wgsl.expected.wgsl
@@ -305,7 +305,7 @@
   let x_362 : vec3<f32> = output5;
   let x_365 : mat3x3<f32> = invTBN;
   let x_366 : vec4<f32> = v_output2;
-  numSamples = (15.0 + (dot((x_361 * -(x_362)), (x_365 * vec3<f32>(x_366.x, x_366.y, x_366.z))) * -11.0));
+  numSamples = (15.0 + (dot((x_361 * -(x_362)), (x_365 * vec3<f32>(x_366.x, x_366.y, x_366.z))) * -(11.0)));
   let x_374 : f32 = numSamples;
   stepSize = (1.0 / x_374);
   currRayHeight = 1.0;
diff --git a/test/tint/expressions/binary/add/mat3x3-mat3x3/f16.wgsl.expected.wgsl b/test/tint/expressions/binary/add/mat3x3-mat3x3/f16.wgsl.expected.wgsl
index 202712a..77245fe 100644
--- a/test/tint/expressions/binary/add/mat3x3-mat3x3/f16.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/add/mat3x3-mat3x3/f16.wgsl.expected.wgsl
@@ -3,6 +3,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat3x3<f16>(vec3<f16>(1.0h, 2.0h, 3.0h), vec3<f16>(4.0h, 5.0h, 6.0h), vec3<f16>(7.0h, 8.0h, 9.0h));
-  let b = mat3x3<f16>(vec3<f16>(-1.0h, -2.0h, -3.0h), vec3<f16>(-4.0h, -5.0h, -6.0h), vec3<f16>(-7.0h, -8.0h, -9.0h));
+  let b = mat3x3<f16>(vec3<f16>(-(1.0h), -(2.0h), -(3.0h)), vec3<f16>(-(4.0h), -(5.0h), -(6.0h)), vec3<f16>(-(7.0h), -(8.0h), -(9.0h)));
   let r : mat3x3<f16> = (a + b);
 }
diff --git a/test/tint/expressions/binary/add/mat3x3-mat3x3/f32.wgsl.expected.wgsl b/test/tint/expressions/binary/add/mat3x3-mat3x3/f32.wgsl.expected.wgsl
index 8aa0a4c..2f3c573 100644
--- a/test/tint/expressions/binary/add/mat3x3-mat3x3/f32.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/add/mat3x3-mat3x3/f32.wgsl.expected.wgsl
@@ -1,6 +1,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat3x3<f32>(vec3<f32>(1.0, 2.0, 3.0), vec3<f32>(4.0, 5.0, 6.0), vec3<f32>(7.0, 8.0, 9.0));
-  let b = mat3x3<f32>(vec3<f32>(-1.0, -2.0, -3.0), vec3<f32>(-4.0, -5.0, -6.0), vec3<f32>(-7.0, -8.0, -9.0));
+  let b = mat3x3<f32>(vec3<f32>(-(1.0), -(2.0), -(3.0)), vec3<f32>(-(4.0), -(5.0), -(6.0)), vec3<f32>(-(7.0), -(8.0), -(9.0)));
   let r : mat3x3<f32> = (a + b);
 }
diff --git a/test/tint/expressions/binary/mul/mat2x4-mat4x2/f16.wgsl.expected.wgsl b/test/tint/expressions/binary/mul/mat2x4-mat4x2/f16.wgsl.expected.wgsl
index c63d459..3ef345b 100644
--- a/test/tint/expressions/binary/mul/mat2x4-mat4x2/f16.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/mul/mat2x4-mat4x2/f16.wgsl.expected.wgsl
@@ -3,6 +3,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat2x4<f16>(vec4<f16>(1.0h, 2.0h, 3.0h, 4.0h), vec4<f16>(5.0h, 6.0h, 7.0h, 8.0h));
-  let b = mat4x2<f16>(vec2<f16>(-1.0h, -2.0h), vec2<f16>(-3.0h, -4.0h), vec2<f16>(-5.0h, -6.0h), vec2<f16>(-7.0h, -8.0h));
+  let b = mat4x2<f16>(vec2<f16>(-(1.0h), -(2.0h)), vec2<f16>(-(3.0h), -(4.0h)), vec2<f16>(-(5.0h), -(6.0h)), vec2<f16>(-(7.0h), -(8.0h)));
   let r : mat4x4<f16> = (a * b);
 }
diff --git a/test/tint/expressions/binary/mul/mat2x4-mat4x2/f32.wgsl.expected.wgsl b/test/tint/expressions/binary/mul/mat2x4-mat4x2/f32.wgsl.expected.wgsl
index 46edcc4..f9b192c 100644
--- a/test/tint/expressions/binary/mul/mat2x4-mat4x2/f32.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/mul/mat2x4-mat4x2/f32.wgsl.expected.wgsl
@@ -1,6 +1,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat2x4<f32>(vec4<f32>(1.0, 2.0, 3.0, 4.0), vec4<f32>(5.0, 6.0, 7.0, 8.0));
-  let b = mat4x2<f32>(vec2<f32>(-1.0, -2.0), vec2<f32>(-3.0, -4.0), vec2<f32>(-5.0, -6.0), vec2<f32>(-7.0, -8.0));
+  let b = mat4x2<f32>(vec2<f32>(-(1.0), -(2.0)), vec2<f32>(-(3.0), -(4.0)), vec2<f32>(-(5.0), -(6.0)), vec2<f32>(-(7.0), -(8.0)));
   let r : mat4x4<f32> = (a * b);
 }
diff --git a/test/tint/expressions/binary/mul/mat3x3-mat3x3/f16.wgsl.expected.wgsl b/test/tint/expressions/binary/mul/mat3x3-mat3x3/f16.wgsl.expected.wgsl
index aef6f82..ffc08ad 100644
--- a/test/tint/expressions/binary/mul/mat3x3-mat3x3/f16.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/mul/mat3x3-mat3x3/f16.wgsl.expected.wgsl
@@ -3,6 +3,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat3x3<f16>(vec3<f16>(1.0h, 2.0h, 3.0h), vec3<f16>(4.0h, 5.0h, 6.0h), vec3<f16>(7.0h, 8.0h, 9.0h));
-  let b = mat3x3<f16>(vec3<f16>(-1.0h, -2.0h, -3.0h), vec3<f16>(-4.0h, -5.0h, -6.0h), vec3<f16>(-7.0h, -8.0h, -9.0h));
+  let b = mat3x3<f16>(vec3<f16>(-(1.0h), -(2.0h), -(3.0h)), vec3<f16>(-(4.0h), -(5.0h), -(6.0h)), vec3<f16>(-(7.0h), -(8.0h), -(9.0h)));
   let r : mat3x3<f16> = (a * b);
 }
diff --git a/test/tint/expressions/binary/mul/mat3x3-mat3x3/f32.wgsl.expected.wgsl b/test/tint/expressions/binary/mul/mat3x3-mat3x3/f32.wgsl.expected.wgsl
index 3265366..d3058a7 100644
--- a/test/tint/expressions/binary/mul/mat3x3-mat3x3/f32.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/mul/mat3x3-mat3x3/f32.wgsl.expected.wgsl
@@ -1,6 +1,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat3x3<f32>(vec3<f32>(1.0, 2.0, 3.0), vec3<f32>(4.0, 5.0, 6.0), vec3<f32>(7.0, 8.0, 9.0));
-  let b = mat3x3<f32>(vec3<f32>(-1.0, -2.0, -3.0), vec3<f32>(-4.0, -5.0, -6.0), vec3<f32>(-7.0, -8.0, -9.0));
+  let b = mat3x3<f32>(vec3<f32>(-(1.0), -(2.0), -(3.0)), vec3<f32>(-(4.0), -(5.0), -(6.0)), vec3<f32>(-(7.0), -(8.0), -(9.0)));
   let r : mat3x3<f32> = (a * b);
 }
diff --git a/test/tint/expressions/binary/mul/mat4x2-mat2x4/f16.wgsl.expected.wgsl b/test/tint/expressions/binary/mul/mat4x2-mat2x4/f16.wgsl.expected.wgsl
index 87b308a..d74dec7 100644
--- a/test/tint/expressions/binary/mul/mat4x2-mat2x4/f16.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/mul/mat4x2-mat2x4/f16.wgsl.expected.wgsl
@@ -2,7 +2,7 @@
 
 @compute @workgroup_size(1)
 fn f() {
-  let a = mat4x2<f16>(vec2<f16>(-1.0h, -2.0h), vec2<f16>(-3.0h, -4.0h), vec2<f16>(-5.0h, -6.0h), vec2<f16>(-7.0h, -8.0h));
+  let a = mat4x2<f16>(vec2<f16>(-(1.0h), -(2.0h)), vec2<f16>(-(3.0h), -(4.0h)), vec2<f16>(-(5.0h), -(6.0h)), vec2<f16>(-(7.0h), -(8.0h)));
   let b = mat2x4<f16>(vec4<f16>(1.0h, 2.0h, 3.0h, 4.0h), vec4<f16>(5.0h, 6.0h, 7.0h, 8.0h));
   let r : mat2x2<f16> = (a * b);
 }
diff --git a/test/tint/expressions/binary/mul/mat4x2-mat2x4/f32.wgsl.expected.wgsl b/test/tint/expressions/binary/mul/mat4x2-mat2x4/f32.wgsl.expected.wgsl
index 0e59163..8f335af 100644
--- a/test/tint/expressions/binary/mul/mat4x2-mat2x4/f32.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/mul/mat4x2-mat2x4/f32.wgsl.expected.wgsl
@@ -1,6 +1,6 @@
 @compute @workgroup_size(1)
 fn f() {
-  let a = mat4x2<f32>(vec2<f32>(-1.0, -2.0), vec2<f32>(-3.0, -4.0), vec2<f32>(-5.0, -6.0), vec2<f32>(-7.0, -8.0));
+  let a = mat4x2<f32>(vec2<f32>(-(1.0), -(2.0)), vec2<f32>(-(3.0), -(4.0)), vec2<f32>(-(5.0), -(6.0)), vec2<f32>(-(7.0), -(8.0)));
   let b = mat2x4<f32>(vec4<f32>(1.0, 2.0, 3.0, 4.0), vec4<f32>(5.0, 6.0, 7.0, 8.0));
   let r : mat2x2<f32> = (a * b);
 }
diff --git a/test/tint/expressions/binary/sub/mat3x3-mat3x3/f16.wgsl.expected.wgsl b/test/tint/expressions/binary/sub/mat3x3-mat3x3/f16.wgsl.expected.wgsl
index 2241588..284a03e 100644
--- a/test/tint/expressions/binary/sub/mat3x3-mat3x3/f16.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/sub/mat3x3-mat3x3/f16.wgsl.expected.wgsl
@@ -3,6 +3,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat3x3<f16>(vec3<f16>(1.0h, 2.0h, 3.0h), vec3<f16>(4.0h, 5.0h, 6.0h), vec3<f16>(7.0h, 8.0h, 9.0h));
-  let b = mat3x3<f16>(vec3<f16>(-1.0h, -2.0h, -3.0h), vec3<f16>(-4.0h, -5.0h, -6.0h), vec3<f16>(-7.0h, -8.0h, -9.0h));
+  let b = mat3x3<f16>(vec3<f16>(-(1.0h), -(2.0h), -(3.0h)), vec3<f16>(-(4.0h), -(5.0h), -(6.0h)), vec3<f16>(-(7.0h), -(8.0h), -(9.0h)));
   let r : mat3x3<f16> = (a - b);
 }
diff --git a/test/tint/expressions/binary/sub/mat3x3-mat3x3/f32.wgsl.expected.wgsl b/test/tint/expressions/binary/sub/mat3x3-mat3x3/f32.wgsl.expected.wgsl
index 0145210..adddeb3 100644
--- a/test/tint/expressions/binary/sub/mat3x3-mat3x3/f32.wgsl.expected.wgsl
+++ b/test/tint/expressions/binary/sub/mat3x3-mat3x3/f32.wgsl.expected.wgsl
@@ -1,6 +1,6 @@
 @compute @workgroup_size(1)
 fn f() {
   let a = mat3x3<f32>(vec3<f32>(1.0, 2.0, 3.0), vec3<f32>(4.0, 5.0, 6.0), vec3<f32>(7.0, 8.0, 9.0));
-  let b = mat3x3<f32>(vec3<f32>(-1.0, -2.0, -3.0), vec3<f32>(-4.0, -5.0, -6.0), vec3<f32>(-7.0, -8.0, -9.0));
+  let b = mat3x3<f32>(vec3<f32>(-(1.0), -(2.0), -(3.0)), vec3<f32>(-(4.0), -(5.0), -(6.0)), vec3<f32>(-(7.0), -(8.0), -(9.0)));
   let r : mat3x3<f32> = (a - b);
 }
diff --git a/test/tint/expressions/bitcast/scalar/i32min-u32.wgsl.expected.wgsl b/test/tint/expressions/bitcast/scalar/i32min-u32.wgsl.expected.wgsl
index 374110c..5e19baa 100644
--- a/test/tint/expressions/bitcast/scalar/i32min-u32.wgsl.expected.wgsl
+++ b/test/tint/expressions/bitcast/scalar/i32min-u32.wgsl.expected.wgsl
@@ -1,4 +1,4 @@
 @compute @workgroup_size(1)
 fn f() {
-  let b : u32 = bitcast<u32>(-2147483648);
+  let b : u32 = bitcast<u32>(-(2147483648));
 }
diff --git a/test/tint/expressions/literals/intmin.wgsl.expected.wgsl b/test/tint/expressions/literals/intmin.wgsl.expected.wgsl
index b3834c1..eafbdc1 100644
--- a/test/tint/expressions/literals/intmin.wgsl.expected.wgsl
+++ b/test/tint/expressions/literals/intmin.wgsl.expected.wgsl
@@ -1,6 +1,6 @@
 fn add_int_min_explicit() -> i32 {
-  var a = -2147483648;
+  var a = -(2147483648);
   var b = (a + 1);
-  var c = (-2147483648 + 1);
+  var c = (-(2147483648) + 1);
   return c;
 }
diff --git a/test/tint/samples/compute_boids.wgsl.expected.wgsl b/test/tint/samples/compute_boids.wgsl.expected.wgsl
index 253d6f0..fd43650 100644
--- a/test/tint/samples/compute_boids.wgsl.expected.wgsl
+++ b/test/tint/samples/compute_boids.wgsl.expected.wgsl
@@ -77,17 +77,17 @@
   vVel = (((vVel + (cMass * params.rule1Scale)) + (colVel * params.rule2Scale)) + (cVel * params.rule3Scale));
   vVel = (normalize(vVel) * clamp(length(vVel), 0.0, 0.1));
   vPos = (vPos + (vVel * params.deltaT));
-  if ((vPos.x < -1.0)) {
+  if ((vPos.x < -(1.0))) {
     vPos.x = 1.0;
   }
   if ((vPos.x > 1.0)) {
-    vPos.x = -1.0;
+    vPos.x = -(1.0);
   }
-  if ((vPos.y < -1.0)) {
+  if ((vPos.y < -(1.0))) {
     vPos.y = 1.0;
   }
   if ((vPos.y > 1.0)) {
-    vPos.y = -1.0;
+    vPos.y = -(1.0);
   }
   particlesB.particles[index].pos = vPos;
   particlesB.particles[index].vel = vVel;
diff --git a/test/tint/samples/triangle.wgsl.expected.wgsl b/test/tint/samples/triangle.wgsl.expected.wgsl
index dcdf48c..852014c 100644
--- a/test/tint/samples/triangle.wgsl.expected.wgsl
+++ b/test/tint/samples/triangle.wgsl.expected.wgsl
@@ -1,4 +1,4 @@
-const pos = array<vec2<f32>, 3>(vec2(0.0, 0.5), vec2(-0.5, -0.5), vec2(0.5, -0.5));
+const pos = array<vec2<f32>, 3>(vec2(0.0, 0.5), vec2(-(0.5), -(0.5)), vec2(0.5, -(0.5)));
 
 @vertex
 fn vtx_main(@builtin(vertex_index) VertexIndex : u32) -> @builtin(position) vec4<f32> {