[msl-writer][hlsl-writer] Remove space between builtin and (.

The builting CL accidentally inserted indenting between the name of the
builtin and the opening paren. This CL removes the extraneous spacing.

Change-Id: If684ec6f2fb4bf13b559c16b246f57f7975d019d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28944
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

src/writer/hlsl/generator_impl.cc

diff --git a/src/writer/hlsl/generator_impl.cc b/src/writer/hlsl/generator_impl.cc
index 6e91894..2b54bac 100644
--- a/src/writer/hlsl/generator_impl.cc
+++ b/src/writer/hlsl/generator_impl.cc
@@ -587,7 +587,8 @@
           error_ = "Textures not implemented yet";
           return false;
         }
-        if (!EmitBuiltinName(pre, out, expr)) {
+        name = generate_builtin_name(expr);
+        if (name.empty()) {
           return false;
         }
       }
@@ -662,9 +663,8 @@
   return true;
 }
 
-bool GeneratorImpl::EmitBuiltinName(std::ostream&,
-                                    std::ostream& out,
-                                    ast::CallExpression* expr) {
+std::string GeneratorImpl::generate_builtin_name(ast::CallExpression* expr) {
+  std::string out;
   auto* ident = expr->func()->AsIdentifier();
   switch (ident->intrinsic()) {
     case ast::Intrinsic::kAcos:
@@ -701,26 +701,26 @@
     case ast::Intrinsic::kMax:
     case ast::Intrinsic::kMin:
     case ast::Intrinsic::kClamp:
-      out << ident->name();
+      out = ident->name();
       break;
     case ast::Intrinsic::kFaceForward:
-      out << "faceforward";
+      out = "faceforward";
       break;
     case ast::Intrinsic::kFract:
-      out << "frac";
+      out = "frac";
       break;
     case ast::Intrinsic::kInverseSqrt:
-      out << "rsqrt";
+      out = "rsqrt";
       break;
     case ast::Intrinsic::kSmoothStep:
-      out << "smoothstep";
+      out = "smoothstep";
       break;
     default:
       error_ = "Unknown builtin method: " + ident->name();
-      return false;
+      return "";
   }
 
-  return true;
+  return out;
 }
 
 bool GeneratorImpl::EmitCase(std::ostream& out, ast::CaseStatement* stmt) {

src/writer/hlsl/generator_impl.h

diff --git a/src/writer/hlsl/generator_impl.h b/src/writer/hlsl/generator_impl.h
index 1e231a6..4ba5176 100644
--- a/src/writer/hlsl/generator_impl.h
+++ b/src/writer/hlsl/generator_impl.h
@@ -201,14 +201,6 @@
   /// @param stmt the statement to emit
   /// @returns true if the statement was successfully emitted
   bool EmitIf(std::ostream& out, ast::IfStatement* stmt);
-  /// Handles generating a builtin method name
-  /// @param pre the preamble for the expression stream
-  /// @param out the output of the expression stream
-  /// @param expr the expression
-  /// @returns true if the name was successfully emitted.
-  bool EmitBuiltinName(std::ostream& pre,
-                       std::ostream& out,
-                       ast::CallExpression* expr);
   /// Handles a literal
   /// @param out the output stream
   /// @param lit the literal to emit
@@ -325,6 +317,10 @@
   /// @param intrinsic the intrinsic to convert to a name
   /// @returns the intrinsic name or blank on error
   std::string generate_intrinsic_name(ast::Intrinsic intrinsic);
+  /// Handles generating a builtin method name
+  /// @param expr the expression
+  /// @returns the name or "" if not valid
+  std::string generate_builtin_name(ast::CallExpression* expr);
   /// Converts a builtin to an attribute name
   /// @param builtin the builtin to convert
   /// @returns the string name of the builtin or blank on error

src/writer/msl/generator_impl.cc

diff --git a/src/writer/msl/generator_impl.cc b/src/writer/msl/generator_impl.cc
index 6f26ffa..cd92b1c 100644
--- a/src/writer/msl/generator_impl.cc
+++ b/src/writer/msl/generator_impl.cc
@@ -517,7 +517,8 @@
           error_ = "Textures not implemented yet";
           return false;
         }
-        if (!EmitBuiltinName(ident)) {
+        name = generate_builtin_name(ident);
+        if (name.empty()) {
           return false;
         }
       }
@@ -622,8 +623,9 @@
   return true;
 }
 
-bool GeneratorImpl::EmitBuiltinName(ast::IdentifierExpression* ident) {
-  out_ << "metal::";
+std::string GeneratorImpl::generate_builtin_name(
+    ast::IdentifierExpression* ident) {
+  std::string out = "metal::";
   switch (ident->intrinsic()) {
     case ast::Intrinsic::kAcos:
     case ast::Intrinsic::kAsin:
@@ -657,46 +659,46 @@
     case ast::Intrinsic::kTrunc:
     case ast::Intrinsic::kSign:
     case ast::Intrinsic::kClamp:
-      out_ << ident->name();
+      out += ident->name();
       break;
     case ast::Intrinsic::kAbs:
       if (ident->result_type()->IsF32()) {
-        out_ << "fabs";
+        out += "fabs";
       } else if (ident->result_type()->IsU32() ||
                  ident->result_type()->IsI32()) {
-        out_ << "abs";
+        out += "abs";
       }
       break;
     case ast::Intrinsic::kMax:
       if (ident->result_type()->IsF32()) {
-        out_ << "fmax";
+        out += "fmax";
       } else if (ident->result_type()->IsU32() ||
                  ident->result_type()->IsI32()) {
-        out_ << "max";
+        out += "max";
       }
       break;
     case ast::Intrinsic::kMin:
       if (ident->result_type()->IsF32()) {
-        out_ << "fmin";
+        out += "fmin";
       } else if (ident->result_type()->IsU32() ||
                  ident->result_type()->IsI32()) {
-        out_ << "min";
+        out += "min";
       }
       break;
     case ast::Intrinsic::kFaceForward:
-      out_ << "faceforward";
+      out += "faceforward";
       break;
     case ast::Intrinsic::kSmoothStep:
-      out_ << "smoothstep";
+      out += "smoothstep";
       break;
     case ast::Intrinsic::kInverseSqrt:
-      out_ << "rsqrt";
+      out += "rsqrt";
       break;
     default:
       error_ = "Unknown import method: " + ident->name();
-      return false;
+      return "";
   }
-  return true;
+  return out;
 }
 
 bool GeneratorImpl::EmitCase(ast::CaseStatement* stmt) {

src/writer/msl/generator_impl.h

diff --git a/src/writer/msl/generator_impl.h b/src/writer/msl/generator_impl.h
index f33a143..3582e19 100644
--- a/src/writer/msl/generator_impl.h
+++ b/src/writer/msl/generator_impl.h
@@ -147,10 +147,6 @@
   /// @param stmt the statement to emit
   /// @returns true if the statement was successfully emitted
   bool EmitIf(ast::IfStatement* stmt);
-  /// Handles generating a builtin name
-  /// @param ident the identifier to build the name from
-  /// @returns true if the name was successfully emitted.
-  bool EmitBuiltinName(ast::IdentifierExpression* ident);
   /// Handles a literal
   /// @param lit the literal to emit
   /// @returns true if the literal was successfully emitted
@@ -230,6 +226,10 @@
   /// @param intrinsic the intrinsic to convert to an method name
   /// @returns the intrinsic name or blank on error
   std::string generate_intrinsic_name(ast::Intrinsic intrinsic);
+  /// Handles generating a builtin name
+  /// @param ident the identifier to build the name from
+  /// @returns the name or "" if not valid
+  std::string generate_builtin_name(ast::IdentifierExpression* ident);
 
   /// Checks if the global variable is in an input or output struct
   /// @param var the variable to check

src/writer/msl/generator_impl_import_test.cc

diff --git a/src/writer/msl/generator_impl_import_test.cc b/src/writer/msl/generator_impl_import_test.cc
index 358838f..1e56fc8 100644
--- a/src/writer/msl/generator_impl_import_test.cc
+++ b/src/writer/msl/generator_impl_import_test.cc
@@ -70,8 +70,8 @@
   ASSERT_TRUE(td.DetermineResultType(&call)) << td.error();
 
   GeneratorImpl g(&mod);
-  ASSERT_TRUE(g.EmitBuiltinName(ident_ptr)) << g.error();
-  EXPECT_EQ(g.result(), std::string("metal::") + param.msl_name);
+  ASSERT_EQ(g.generate_builtin_name(ident_ptr),
+            std::string("metal::") + param.msl_name);
 }
 INSTANTIATE_TEST_SUITE_P(MslGeneratorImplTest,
                          MslImportData_SingleParamTest,