Update zc-conformance.md for accuracy and consistency

Changes assume accuracy of the individual option doc pages

* Update default values per individual option docs
* Use consistent wording and formatting for default values
* Mention [-] syntax where applicable

Author: balagansky-work

docs/build/reference/zc-conformance.md

@@ -22,36 +22,36 @@ Here are the **`/Zc`** compiler options:
 
 | Option | Behavior |
 |--|--|
-| [`/Zc:__cplusplus`](zc-cplusplus.md) | Enable the `__cplusplus` macro to report the supported standard (off by default). |
+| [`/Zc:__cplusplus[-]`](zc-cplusplus.md) | Enable the `__cplusplus` macro to report the supported standard (off by default). |
 | [`/Zc:__STDC__`](zc-stdc.md) | Enable the `__STDC__` macro to report the C standard is supported (off by default). |
-| [`/Zc:alignedNew`](zc-alignednew.md) | Enable C++17 over-aligned dynamic allocation (on by default in C++17). |
-| [`/Zc:auto`](zc-auto-deduce-variable-type.md) | Enforce the new Standard C++ meaning for **`auto`** (on by default). |
-| [`/Zc:char8_t`](zc-char8-t.md) | Enable or disable C++20 native `u8` literal support as `const char8_t` (off by default, except under **`/std:c++20`**). |
+| [`/Zc:alignedNew[-]`](zc-alignednew.md) | Enable C++17 over-aligned dynamic allocation (off by default, except under **`/std:c++17`** or later). |
+| [`/Zc:auto[-]`](zc-auto-deduce-variable-type.md) | Enforce the new Standard C++ meaning for **`auto`** (on by default). |
+| [`/Zc:char8_t[-]`](zc-char8-t.md) | Enable or disable C++20 native `u8` literal support as `const char8_t` (off by default, except under **`/std:c++20`** or later). |
 | [`/Zc:enumTypes[-]`](zc-enumtypes.md) | Enable Standard C++ rules for `enum` type deduction (off by default). |
-| [`/Zc:externC`](zc-externc.md) | Enforce Standard C++ rules for `extern "C"` functions (implied by **`/permissive-`**). |
-| [`/Zc:externConstexpr`](zc-externconstexpr.md) | Enable external linkage for **`constexpr`** variables (off by default). |
-| [`/Zc:forScope`](zc-forscope-force-conformance-in-for-loop-scope.md) | Enforce Standard C++ **`for`** scoping rules (on by default). |
-| [`/Zc:gotoScope`](zc-gotoscope.md) | Enforce Standard C++ **`goto`** rules around local variable initialization (implied by **`/permissive-`**). |
-| [`/Zc:hiddenFriend`](zc-hiddenfriend.md) | Enforce Standard C++ hidden friend rules (implied by **`/permissive-`**) |
-| [`/Zc:implicitNoexcept`](zc-implicitnoexcept-implicit-exception-specifiers.md) | Enable implicit **`noexcept`** on required functions (on by default). |
-| [`/Zc:inline`](zc-inline-remove-unreferenced-comdat.md) | Remove unreferenced functions or data if they're COMDAT or have internal linkage only (off by default). |
-| [`/Zc:lambda`](zc-lambda.md) | Enable new lambda processor for conformance-mode syntactic checks in generic lambdas. |
-| [`/Zc:noexceptTypes`](zc-noexcepttypes.md) | Enforce C++17 **`noexcept`** rules (on by default in C++17 or later). |
-| [`/Zc:nrvo[-]`](zc-nrvo.md) | Enable optional copy and move elisions (on by default under **`/O2`**, **`/permissive-`**, or **`/std:c++20`** or later). |
-| [`/Zc:preprocessor`](zc-preprocessor.md) | Use the new conforming preprocessor (off by default, except in C11/C17). |
-| [`/Zc:referenceBinding`](zc-referencebinding-enforce-reference-binding-rules.md) | A UDT temporary won't bind to a non-const lvalue reference (off by default). |
-| [`/Zc:rvalueCast`](zc-rvaluecast-enforce-type-conversion-rules.md) | Enforce Standard C++ explicit type conversion rules (off by default). |
-| [`/Zc:sizedDealloc`](zc-sizeddealloc-enable-global-sized-dealloc-functions.md) | Enable C++14 global sized deallocation functions (on by default). |
-| [`/Zc:strictStrings`](zc-strictstrings-disable-string-literal-type-conversion.md) | Disable string-literal to `char*` or `wchar_t*` conversion (off by default). |
-| [`/Zc:static_assert`](zc-static-assert.md) | strict handling of `static_assert` (implied by  **`/permissive-`**). |
+| [`/Zc:externC[-]`](zc-externc.md) | Enforce Standard C++ rules for `extern "C"` functions (off by default, except under **`/permissive-`**). |
+| [`/Zc:externConstexpr[-]`](zc-externconstexpr.md) | Enable external linkage for **`constexpr`** variables (off by default). |
+| [`/Zc:forScope[-]`](zc-forscope-force-conformance-in-for-loop-scope.md) | Enforce Standard C++ **`for`** scoping rules (on by default). |
+| [`/Zc:gotoScope[-]`](zc-gotoscope.md) | Enforce Standard C++ **`goto`** rules around local variable initialization (off by default, except under **`/permissive-`**). |
+| [`/Zc:hiddenFriend[-]`](zc-hiddenfriend.md) | Enforce Standard C++ hidden friend rules (off by default, except under **`/permissive-`**) |
+| [`/Zc:implicitNoexcept[-]`](zc-implicitnoexcept-implicit-exception-specifiers.md) | Enable implicit **`noexcept`** on required functions (on by default). |
+| [`/Zc:inline[-]`](zc-inline-remove-unreferenced-comdat.md) | Remove unreferenced functions or data if they're COMDAT or have internal linkage only (off by default). |
+| [`/Zc:lambda[-]`](zc-lambda.md) | Enable new lambda processor for conformance-mode syntactic checks in generic lambdas (off by default, except under **`/std:c++20`** or later). |
+| [`/Zc:noexceptTypes[-]`](zc-noexcepttypes.md) | Enforce C++17 **`noexcept`** rules (off by default, except under **`/std:c++17`** or later). |
+| [`/Zc:nrvo[-]`](zc-nrvo.md) | Enable optional copy and move elisions (off by default, except under **`/O2`**, **`/permissive-`**, or **`/std:c++20`** or later). |
+| [`/Zc:preprocessor[-]`](zc-preprocessor.md) | Use the new conforming preprocessor (off by default, except under **`/std:c11`** or later). |
+| [`/Zc:referenceBinding[-]`](zc-referencebinding-enforce-reference-binding-rules.md) | A UDT temporary won't bind to a non-const lvalue reference (off by default, except under **`/permissive-`**). |
+| [`/Zc:rvalueCast[-]`](zc-rvaluecast-enforce-type-conversion-rules.md) | Enforce Standard C++ explicit type conversion rules (off by default, except under **`/permissive-`**). |
+| [`/Zc:sizedDealloc[-]`](zc-sizeddealloc-enable-global-sized-dealloc-functions.md) | Enable C++14 global sized deallocation functions (on by default). |
+| [`/Zc:strictStrings[-]`](zc-strictstrings-disable-string-literal-type-conversion.md) | Disable string-literal to `char*` or `wchar_t*` conversion (off by default, except under **`/permissive-`**). |
+| [`/Zc:static_assert[-]`](zc-static-assert.md) | strict handling of `static_assert` (off by default, except under **`/permissive-`**). |
 | [`/Zc:templateScope[-]`](zc-templatescope.md) | Enforce Standard C++ template parameter shadowing rules (off by default). |
-| [`/Zc:ternary`](zc-ternary.md) | Enforce conditional operator rules on operand types (off by default). |
-| [`/Zc:threadSafeInit`](zc-threadsafeinit-thread-safe-local-static-initialization.md) | Enable thread-safe local static initialization (on by default). |
-| [`/Zc:throwingNew`](zc-throwingnew-assume-operator-new-throws.md) | Assume **`operator new`** throws on failure (off by default). |
+| [`/Zc:ternary[-]`](zc-ternary.md) | Enforce conditional operator rules on operand types (off by default, except under **`/permissive-`**). |
+| [`/Zc:threadSafeInit[-]`](zc-threadsafeinit-thread-safe-local-static-initialization.md) | Enable thread-safe local static initialization (on by default). |
+| [`/Zc:throwingNew[-]`](zc-throwingnew-assume-operator-new-throws.md) | Assume **`operator new`** throws on failure (off by default). |
 | [`/Zc:tlsGuards[-]`](zc-tlsguards.md) | Generate runtime checks for TLS variable initialization (on by default). |
-| [`/Zc:trigraphs`](zc-trigraphs-trigraphs-substitution.md) | Enable trigraphs (obsolete, off by default). |
-| [`/Zc:twoPhase`](zc-twophase.md) | Use non-conforming template parsing behavior (conforming by default). |
-| [`/Zc:wchar_t`](zc-wchar-t-wchar-t-is-native-type.md) | **`wchar_t`** is a native type, not a typedef (on by default). |
+| [`/Zc:trigraphs[-]`](zc-trigraphs-trigraphs-substitution.md) | Enable trigraphs (obsolete, off by default). |
+| [`/Zc:twoPhase-`](zc-twophase.md) | Use non-conforming template parsing behavior (only applicable under **`/permissive-`**, which defaults to conforming). |
+| [`/Zc:wchar_t[-]`](zc-wchar-t-wchar-t-is-native-type.md) | **`wchar_t`** is a native type, not a typedef (on by default). |
 | [`/Zc:zeroSizeArrayNew[-]`](zc-zerosizearraynew.md) | Call member `new`/`delete` for 0-size arrays of objects (on by default). |
 
 For more information about conformance issues in MSVC, see [Nonstandard behavior](../../cpp/nonstandard-behavior.md).