tint/templates: Generate enum string arrays

This will be useful for emitting possible enum values when an enum fails to parse.

Bug: tint:1629
Change-Id: I0be177a2bc27962580f4465ec18fdc5f2e930a99
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/105322
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>

src/tint/ast/address_space.h

@@ -52,6 +52,10 @@ std::ostream& operator<<(std::ostream& out, AddressSpace value);
 /// @returns the parsed enum, or AddressSpace::kInvalid if the string could not be parsed.
 AddressSpace ParseAddressSpace(std::string_view str);
 
+constexpr const char* kAddressSpaceStrings[] = {
+    "function", "private", "push_constant", "storage", "uniform", "workgroup",
+};
+
 /// @returns true if the AddressSpace is host-shareable
 /// @param address_space the AddressSpace
 /// @see https://gpuweb.github.io/gpuweb/wgsl.html#host-shareable

src/tint/ast/builtin_value.h

@@ -55,6 +55,15 @@ std::ostream& operator<<(std::ostream& out, BuiltinValue value);
 /// @returns the parsed enum, or BuiltinValue::kInvalid if the string could not be parsed.
 BuiltinValue ParseBuiltinValue(std::string_view str);
 
+constexpr const char* kBuiltinValueStrings[] = {
+    "frag_depth",           "front_facing",
+    "global_invocation_id", "instance_index",
+    "local_invocation_id",  "local_invocation_index",
+    "num_workgroups",       "position",
+    "sample_index",         "sample_mask",
+    "vertex_index",         "workgroup_id",
+};
+
 }  // namespace tint::ast
 
 #endif  // SRC_TINT_AST_BUILTIN_VALUE_H_

src/tint/ast/extension.h

@@ -49,6 +49,13 @@ std::ostream& operator<<(std::ostream& out, Extension value);
 /// @returns the parsed enum, or Extension::kInvalid if the string could not be parsed.
 Extension ParseExtension(std::string_view str);
 
+constexpr const char* kExtensionStrings[] = {
+    "chromium_disable_uniformity_analysis",
+    "chromium_experimental_dp4a",
+    "chromium_experimental_push_constant",
+    "f16",
+};
+
 // A unique vector of extensions
 using Extensions = utils::UniqueVector<Extension, 4>;
 

src/tint/ast/texel_format.h

@@ -58,6 +58,12 @@ std::ostream& operator<<(std::ostream& out, TexelFormat value);
 /// @returns the parsed enum, or TexelFormat::kInvalid if the string could not be parsed.
 TexelFormat ParseTexelFormat(std::string_view str);
 
+constexpr const char* kTexelFormatStrings[] = {
+    "r32float",    "r32sint",    "r32uint",    "rg32float",   "rg32sint",   "rg32uint",
+    "rgba16float", "rgba16sint", "rgba16uint", "rgba32float", "rgba32sint", "rgba32uint",
+    "rgba8sint",   "rgba8snorm", "rgba8uint",  "rgba8unorm",
+};
+
 }  // namespace tint::ast
 
 #endif  // SRC_TINT_AST_TEXEL_FORMAT_H_

src/tint/templates/enums.tmpl.inc

@@ -28,6 +28,14 @@ std::ostream& operator<<(std::ostream& out, {{$enum}} value);
 /// @returns the parsed enum, or {{$enum}}::kInvalid if the string could not be parsed.
 {{$enum}} Parse{{$enum}}(std::string_view str);
 
+constexpr const char* k{{$enum}}Strings[] = {
+{{-   range $entry := $.Entries }}
+{{-     if not $entry.IsInternal}}
+    "{{$entry.Name}}",
+{{-     end }}
+{{-   end }}
+};
+
 {{- end -}}