https://github.com/vbvictor updated
https://github.com/llvm/llvm-project/pull/153870
>From a2e29274393a1adf00093a31c16706b7323a0240 Mon Sep 17 00:00:00 2001
From: Victor Baranov <bar.victor.2...@gmail.com>
Date: Fri, 15 Aug 2025 23:18:22 +0300
Subject: [PATCH 1/2] [clang-tidy] Rename "clang-diagnostic-error" to
"clang-compiler-error"
---
.../clang-tidy/ClangTidyDiagnosticConsumer.cpp | 8 ++++----
clang-tools-extra/docs/ReleaseNotes.rst | 4 ++++
.../struct-pack-align-invalid-decl-no-crash.cpp | 2 +-
.../checkers/altera/struct-pack-align-no-crash.cpp | 2 +-
.../bugprone/branch-clone-unknown-expr.cpp | 6 +++---
.../bugprone/suspicious-semicolon-fail.cpp | 2 +-
.../checkers/cppcoreguidelines/init-variables.cpp | 2 +-
.../pro-type-member-init-no-crash.cpp | 2 +-
.../checkers/misc/misplaced-const-cxx17.cpp | 2 +-
.../checkers/misc/unused-using-decls-errors.cpp | 2 +-
.../checkers/modernize/use-noexcept-error.cpp | 2 +-
.../performance/noexcept-move-constructor.cpp | 4 ++--
.../unnecessary-value-param-incomplete-type.cpp | 2 +-
.../isolate-declaration-no-infinite-loop.cpp | 2 +-
.../test/clang-tidy/infrastructure/diagnostic.cpp | 14 +++++++-------
.../infrastructure/export-diagnostics.cpp | 12 ++++++------
.../infrastructure/serialize-diagnostics.cpp | 2 +-
17 files changed, 37 insertions(+), 33 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.cpp
b/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.cpp
index fac6e0418d163..34f29a5a953f1 100644
--- a/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.cpp
+++ b/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.cpp
@@ -409,16 +409,16 @@ void ClangTidyDiagnosticConsumer::HandleDiagnostic(
switch (DiagLevel) {
case DiagnosticsEngine::Error:
case DiagnosticsEngine::Fatal:
- CheckName = "clang-diagnostic-error";
+ CheckName = "clang-compiler-error";
break;
case DiagnosticsEngine::Warning:
- CheckName = "clang-diagnostic-warning";
+ CheckName = "clang-compiler-warning";
break;
case DiagnosticsEngine::Remark:
- CheckName = "clang-diagnostic-remark";
+ CheckName = "clang-compiler-remark";
break;
default:
- CheckName = "clang-diagnostic-unknown";
+ CheckName = "clang-compiler-unknown";
break;
}
}
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst
b/clang-tools-extra/docs/ReleaseNotes.rst
index 1553f461634d0..4354fbb464d4d 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -115,6 +115,10 @@ Improvements to clang-tidy
- Improved documentation of the `-line-filter` command-line flag of
:program:`clang-tidy` and :program:`run-clang-tidy.py`.
+- Improved :program:`clang-tidy` by renaming ``clang-diagnostic-error``
+ diagnostic to ``clang-compiler-error`` to better distinguish :program:`clang`
+ hard compiler errors from diagnostics coming from compiler flags.
+
New checks
^^^^^^^^^^
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-invalid-decl-no-crash.cpp
b/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-invalid-decl-no-crash.cpp
index 5688c03ca0e16..342adbc0910aa 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-invalid-decl-no-crash.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-invalid-decl-no-crash.cpp
@@ -3,4 +3,4 @@
struct Foo {
member; // no-crash
};
-// CHECK-MESSAGES: :[[@LINE-2]]:3: error: a type specifier is required for all
declarations [clang-diagnostic-error]
+// CHECK-MESSAGES: :[[@LINE-2]]:3: error: a type specifier is required for all
declarations [clang-compiler-error]
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-no-crash.cpp
b/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-no-crash.cpp
index 660addcbe8039..e4e819e25444b 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-no-crash.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/altera/struct-pack-align-no-crash.cpp
@@ -3,5 +3,5 @@
struct A;
struct B {
A a;
-// CHECK-MESSAGES: :[[@LINE-1]]:5: error: field has incomplete type 'A'
[clang-diagnostic-error]
+// CHECK-MESSAGES: :[[@LINE-1]]:5: error: field has incomplete type 'A'
[clang-compiler-error]
};
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/bugprone/branch-clone-unknown-expr.cpp
b/clang-tools-extra/test/clang-tidy/checkers/bugprone/branch-clone-unknown-expr.cpp
index d2641523750c9..2fcb490bea094 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/bugprone/branch-clone-unknown-expr.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/bugprone/branch-clone-unknown-expr.cpp
@@ -1,9 +1,9 @@
// RUN: %check_clang_tidy -expect-clang-tidy-error %s bugprone-branch-clone %t
int test_unknown_expression() {
- if (unknown_expression_1) { // CHECK-MESSAGES: :[[@LINE]]:7: error:
use of undeclared identifier 'unknown_expression_1' [clang-diagnostic-error]
- function1(unknown_expression_2); // CHECK-MESSAGES: :[[@LINE]]:15: error:
use of undeclared identifier 'unknown_expression_2' [clang-diagnostic-error]
+ if (unknown_expression_1) { // CHECK-MESSAGES: :[[@LINE]]:7: error:
use of undeclared identifier 'unknown_expression_1' [clang-compiler-error]
+ function1(unknown_expression_2); // CHECK-MESSAGES: :[[@LINE]]:15: error:
use of undeclared identifier 'unknown_expression_2' [clang-compiler-error]
} else {
- function2(unknown_expression_3); // CHECK-MESSAGES: :[[@LINE]]:15: error:
use of undeclared identifier 'unknown_expression_3' [clang-diagnostic-error]
+ function2(unknown_expression_3); // CHECK-MESSAGES: :[[@LINE]]:15: error:
use of undeclared identifier 'unknown_expression_3' [clang-compiler-error]
}
}
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-semicolon-fail.cpp
b/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-semicolon-fail.cpp
index 45fa2262f6de7..0768682585873 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-semicolon-fail.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-semicolon-fail.cpp
@@ -18,7 +18,7 @@ void f() {
// CHECK-WERROR: :[[@LINE-1]]:11: warning: potentially unintended semicolon
[bugprone-suspicious-semicolon]
#if ERROR
int a
- // CHECK-ERROR: :[[@LINE-1]]:8: error: expected ';' at end of declaration
[clang-diagnostic-error]
+ // CHECK-ERROR: :[[@LINE-1]]:8: error: expected ';' at end of declaration
[clang-compiler-error]
#elif WERROR
int a;
// CHECK-WERROR: :[[@LINE-1]]:7: error: unused variable 'a'
[clang-diagnostic-unused-variable]
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
index 824431c1bf52f..966d314d2b6d0 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
@@ -131,7 +131,7 @@ void test_clang_diagnostic_error() {
// CHECK-FIXES: {{^}} int a = 0;{{$}}
UnknownType b;
- // CHECK-MESSAGES: :[[@LINE-1]]:3: error: unknown type name 'UnknownType'
[clang-diagnostic-error]
+ // CHECK-MESSAGES: :[[@LINE-1]]:3: error: unknown type name 'UnknownType'
[clang-compiler-error]
// CHECK-FIXES-NOT: {{^}} UnknownType b = 0;{{$}}
}
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/pro-type-member-init-no-crash.cpp
b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/pro-type-member-init-no-crash.cpp
index 2e2964dda1daf..b4a063599fcf0 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/pro-type-member-init-no-crash.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/pro-type-member-init-no-crash.cpp
@@ -2,7 +2,7 @@
struct X {
X x;
- // CHECK-MESSAGES: :[[@LINE-1]]:5: error: field has incomplete type 'X'
[clang-diagnostic-error]
+ // CHECK-MESSAGES: :[[@LINE-1]]:5: error: field has incomplete type 'X'
[clang-compiler-error]
int a = 10;
};
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/misc/misplaced-const-cxx17.cpp
b/clang-tools-extra/test/clang-tidy/checkers/misc/misplaced-const-cxx17.cpp
index 7816a091d7adb..c2a3a59504d70 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/misc/misplaced-const-cxx17.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/misc/misplaced-const-cxx17.cpp
@@ -3,7 +3,7 @@
// This test previously would cause a failed assertion because the structured
// binding declaration had no valid type associated with it. This ensures the
// expected clang diagnostic is generated instead.
-// CHECK-MESSAGES: :[[@LINE+1]]:6: error: decomposition declaration '[x]'
requires an initializer [clang-diagnostic-error]
+// CHECK-MESSAGES: :[[@LINE+1]]:6: error: decomposition declaration '[x]'
requires an initializer [clang-compiler-error]
auto [x];
struct S { int a; };
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/misc/unused-using-decls-errors.cpp
b/clang-tools-extra/test/clang-tidy/checkers/misc/unused-using-decls-errors.cpp
index 1c26a6961aad2..9b4fede68ace2 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/misc/unused-using-decls-errors.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/misc/unused-using-decls-errors.cpp
@@ -8,5 +8,5 @@ using n::C;
void f() {
for (C *p : unknown()) {}
- // CHECK-MESSAGES: :[[@LINE-1]]:15: error: use of undeclared identifier
'unknown' [clang-diagnostic-error]
+ // CHECK-MESSAGES: :[[@LINE-1]]:15: error: use of undeclared identifier
'unknown' [clang-compiler-error]
}
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-noexcept-error.cpp
b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-noexcept-error.cpp
index 9a80b075d65ed..1065f0cb9a632 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-noexcept-error.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-noexcept-error.cpp
@@ -3,4 +3,4 @@
// We're not interested in the check issuing a warning here, just making sure
// clang-tidy doesn't assert.
undefined_type doesThrow() throw();
-// CHECK-MESSAGES: :[[@LINE-1]]:1: error: unknown type name 'undefined_type'
[clang-diagnostic-error]
+// CHECK-MESSAGES: :[[@LINE-1]]:1: error: unknown type name 'undefined_type'
[clang-compiler-error]
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/performance/noexcept-move-constructor.cpp
b/clang-tools-extra/test/clang-tidy/checkers/performance/noexcept-move-constructor.cpp
index 4df0927b62af5..994e0a3509e06 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/performance/noexcept-move-constructor.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/performance/noexcept-move-constructor.cpp
@@ -408,8 +408,8 @@ template <typename value_type> class set {
#ifdef ENABLE_ERROR
set(initializer_list<value_type> __l) {};
- // CHECK-MESSAGES-ERR: :[[@LINE-1]]:7: error: member 'initializer_list'
cannot have template arguments [clang-diagnostic-error]
- // CHECK-MESSAGES-ERR: :[[@LINE-2]]:36: error: expected ')'
[clang-diagnostic-error]
+ // CHECK-MESSAGES-ERR: :[[@LINE-1]]:7: error: member 'initializer_list'
cannot have template arguments [clang-compiler-error]
+ // CHECK-MESSAGES-ERR: :[[@LINE-2]]:36: error: expected ')'
[clang-compiler-error]
#endif
};
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-incomplete-type.cpp
b/clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-incomplete-type.cpp
index e46163a3e2315..f626093ff0e30 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-incomplete-type.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-incomplete-type.cpp
@@ -4,6 +4,6 @@
// clang-tidy diagnostic about IncompleteType being expensive to copy.
struct IncompleteType;
void NegativeForIncompleteType(IncompleteType I) {
- // CHECK-MESSAGES: [[@LINE-1]]:47: error: variable has incomplete type
'IncompleteType' [clang-diagnostic-error]
+ // CHECK-MESSAGES: [[@LINE-1]]:47: error: variable has incomplete type
'IncompleteType' [clang-compiler-error]
}
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/readability/isolate-declaration-no-infinite-loop.cpp
b/clang-tools-extra/test/clang-tidy/checkers/readability/isolate-declaration-no-infinite-loop.cpp
index 78a8ec738800e..908d0c57523b5 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/readability/isolate-declaration-no-infinite-loop.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/readability/isolate-declaration-no-infinite-loop.cpp
@@ -3,5 +3,5 @@
int main(){
int a, b
// CHECK-MESSAGES: [[@LINE-1]]:3: warning: multiple declarations in a single
statement reduces readability
- // CHECK-MESSAGES: [[@LINE-2]]:11: error: expected ';' at end of declaration
[clang-diagnostic-error]
+ // CHECK-MESSAGES: [[@LINE-2]]:11: error: expected ';' at end of declaration
[clang-compiler-error]
}
diff --git a/clang-tools-extra/test/clang-tidy/infrastructure/diagnostic.cpp
b/clang-tools-extra/test/clang-tidy/infrastructure/diagnostic.cpp
index a9d140bc9318e..5fb0d45784831 100644
--- a/clang-tools-extra/test/clang-tidy/infrastructure/diagnostic.cpp
+++ b/clang-tools-extra/test/clang-tidy/infrastructure/diagnostic.cpp
@@ -27,12 +27,12 @@
// RUN: clang-tidy
-checks='-*,modernize-use-override,clang-diagnostic-macro-redefined,clang-diagnostic-literal-conversion'
%s -- -DMACRO_FROM_COMMAND_LINE -std=c++20 -Wno-macro-redefined | FileCheck
--check-prefix=CHECK7 -implicit-check-not='{{warning:|error:}}' %s
// RUN: clang-tidy -checks='-*,modernize-use-override' %s -- -std=c++20
-DPR64602
-// CHECK1: error: no input files [clang-diagnostic-error]
-// CHECK1: error: no such file or directory: '{{.*}}nonexistent.cpp'
[clang-diagnostic-error]
-// CHECK1: error: unable to handle compilation{{.*}} [clang-diagnostic-error]
-// CHECK2: error: unknown argument: '-fan-unknown-option'
[clang-diagnostic-error]
-// CHECK3: error: unknown argument: '-fan-unknown-option'
[clang-diagnostic-error]
-// CHECK5: error: unknown argument: '-fan-option-from-compilation-database'
[clang-diagnostic-error]
+// CHECK1: error: no input files [clang-compiler-error]
+// CHECK1: error: no such file or directory: '{{.*}}nonexistent.cpp'
[clang-compiler-error]
+// CHECK1: error: unable to handle compilation{{.*}} [clang-compiler-error]
+// CHECK2: error: unknown argument: '-fan-unknown-option'
[clang-compiler-error]
+// CHECK3: error: unknown argument: '-fan-unknown-option'
[clang-compiler-error]
+// CHECK5: error: unknown argument: '-fan-option-from-compilation-database'
[clang-compiler-error]
// CHECK7: :[[@LINE+4]]:9: warning: implicit conversion from 'double' to 'int'
changes value from 1.5 to 1 [clang-diagnostic-literal-conversion]
// CHECK2: :[[@LINE+3]]:9: warning: implicit conversion from 'double' to 'int'
changes value from 1.5 to 1 [clang-diagnostic-literal-conversion]
@@ -52,7 +52,7 @@ class A { A(int) {} };
#ifdef COMPILATION_ERROR
void f(int a) {
&(a + 1);
- // CHECK6: :[[@LINE-1]]:3: error: cannot take the address of an rvalue of
type 'int' [clang-diagnostic-error]
+ // CHECK6: :[[@LINE-1]]:3: error: cannot take the address of an rvalue of
type 'int' [clang-compiler-error]
}
#endif
diff --git
a/clang-tools-extra/test/clang-tidy/infrastructure/export-diagnostics.cpp
b/clang-tools-extra/test/clang-tidy/infrastructure/export-diagnostics.cpp
index ca2184332f9a4..fa41d471ab7a1 100644
--- a/clang-tools-extra/test/clang-tidy/infrastructure/export-diagnostics.cpp
+++ b/clang-tools-extra/test/clang-tidy/infrastructure/export-diagnostics.cpp
@@ -18,10 +18,10 @@ struct Foo {
// CHECK-MESSAGES: {{^}}note: expanded from here{{$}}
// CHECK-MESSAGES: -input.cpp:2:1: note: declare 'static' if the function is
not intended to be used outside of this translation unit
// CHECK-MESSAGES: -input.cpp:1:14: note: expanded from macro 'X'
-// CHECK-MESSAGES: -input.cpp:3:7: error: 'a' declared as an array with a
negative size [clang-diagnostic-error]
+// CHECK-MESSAGES: -input.cpp:3:7: error: 'a' declared as an array with a
negative size [clang-compiler-error]
// CHECK-MESSAGES: -input.cpp:4:7: warning: zero size arrays are an extension
[clang-diagnostic-zero-length-array]
-// CHECK-MESSAGES: -input.cpp:6:11: error: unknown type name 'x'
[clang-diagnostic-error]
-// CHECK-MESSAGES: -input.cpp:8:3: error: a type specifier is required for all
declarations [clang-diagnostic-error]
+// CHECK-MESSAGES: -input.cpp:6:11: error: unknown type name 'x'
[clang-compiler-error]
+// CHECK-MESSAGES: -input.cpp:8:3: error: a type specifier is required for all
declarations [clang-compiler-error]
// CHECK-MESSAGES: -input.cpp:9:3: error: single-argument constructors must be
marked explicit to avoid unintentional implicit conversions
[google-explicit-constructor,-warnings-as-errors]
// CHECK-YAML: ---
@@ -56,7 +56,7 @@ struct Foo {
// CHECK-YAML-NEXT: Replacements: []
// CHECK-YAML-NEXT: Level: Error
// CHECK-YAML-NEXT: BuildDirectory: '{{.*}}'
-// CHECK-YAML-NEXT: - DiagnosticName: clang-diagnostic-error
+// CHECK-YAML-NEXT: - DiagnosticName: clang-compiler-error
// CHECK-YAML-NEXT: DiagnosticMessage:
// CHECK-YAML-NEXT: Message: '''a'' declared as an array with a
negative size'
// CHECK-YAML-NEXT: FilePath: '{{.*}}-input.cpp'
@@ -80,7 +80,7 @@ struct Foo {
// CHECK-YAML-NEXT: Length: 1
// CHECK-YAML-NEXT: Level: Warning
// CHECK-YAML-NEXT: BuildDirectory: '{{.*}}'
-// CHECK-YAML-NEXT: - DiagnosticName: clang-diagnostic-error
+// CHECK-YAML-NEXT: - DiagnosticName: clang-compiler-error
// CHECK-YAML-NEXT: DiagnosticMessage:
// CHECK-YAML-NEXT: Message: 'unknown type name ''x'''
// CHECK-YAML-NEXT: FilePath: '{{.*}}-input.cpp'
@@ -88,7 +88,7 @@ struct Foo {
// CHECK-YAML-NEXT: Replacements: []
// CHECK-YAML-NEXT: Level: Error
// CHECK-YAML-NEXT: BuildDirectory: '{{.*}}'
-// CHECK-YAML-NEXT: - DiagnosticName: clang-diagnostic-error
+// CHECK-YAML-NEXT: - DiagnosticName: clang-compiler-error
// CHECK-YAML-NEXT: DiagnosticMessage:
// CHECK-YAML-NEXT: Message: a type specifier is required for
all declarations
// CHECK-YAML-NEXT: FilePath: '{{.*}}-input.cpp'
diff --git
a/clang-tools-extra/test/clang-tidy/infrastructure/serialize-diagnostics.cpp
b/clang-tools-extra/test/clang-tidy/infrastructure/serialize-diagnostics.cpp
index 8b0895af795a0..4bdcef722a3ed 100644
--- a/clang-tools-extra/test/clang-tidy/infrastructure/serialize-diagnostics.cpp
+++ b/clang-tools-extra/test/clang-tidy/infrastructure/serialize-diagnostics.cpp
@@ -1,3 +1,3 @@
// RUN: not clang-tidy -checks=-*,llvm-namespace-comment %s --
-serialize-diagnostics %t | FileCheck %s
-// CHECK: :[[@LINE+1]]:12: error: expected ';' after struct
[clang-diagnostic-error]
+// CHECK: :[[@LINE+1]]:12: error: expected ';' after struct
[clang-compiler-error]
struct A {}
>From c8e0fa4ccd4a50540d99aed4fe6feca15dfaaed0 Mon Sep 17 00:00:00 2001
From: Victor Baranov <bar.victor.2...@gmail.com>
Date: Fri, 15 Aug 2025 23:37:30 +0300
Subject: [PATCH 2/2] [clang-tidy] add docs about "clang-compiler-error"
---
clang-tools-extra/docs/clang-tidy/index.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/clang-tools-extra/docs/clang-tidy/index.rst
b/clang-tools-extra/docs/clang-tidy/index.rst
index e8ce903fcb076..c6d436bee9922 100644
--- a/clang-tools-extra/docs/clang-tidy/index.rst
+++ b/clang-tools-extra/docs/clang-tidy/index.rst
@@ -111,6 +111,13 @@ Diagnostics which have a corresponding warning option, are
named
``-Wliteral-conversion`` will be reported with check name
``clang-diagnostic-literal-conversion``.
+Clang compiler errors (such as syntax errors, semantic errors, or other
failures
+that prevent Clang from compiling the code) are reported with the check name
+``clang-compiler-error``. These represent fundamental compilation failures that
+must be fixed before :program:`clang-tidy` can perform its analysis. Unlike
other
+diagnostics, ``clang-compiler-error`` cannot be disabled, as
:program:`clang-tidy`
+requires valid code to function.
+
The ``-fix`` flag instructs :program:`clang-tidy` to fix found errors if
supported by corresponding checks.
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