Remove StringConversion, StringConcatenation, ListConcatenation CelOptions in favor of subsetting

bundle/src/test/java/dev/cel/bundle/CelImplTest.java

@@ -1991,59 +1991,6 @@ public void program_nativeTypeUnknownsEnabled_asCallArguments() throws Exception
     assertThat(result.attributes()).isEmpty();
   }
 
-  @Test
-  @TestParameters("{expression: 'string(123)'}")
-  @TestParameters("{expression: 'string(123u)'}")
-  @TestParameters("{expression: 'string(1.5)'}")
-  @TestParameters("{expression: 'string(\"foo\")'}")
-  @TestParameters("{expression: 'string(b\"foo\")'}")
-  @TestParameters("{expression: 'string(timestamp(100))'}")
-  @TestParameters("{expression: 'string(duration(\"1h\"))'}")
-  public void program_stringConversionDisabled_throws(String expression) throws Exception {
-    Cel cel =
-        CelFactory.standardCelBuilder()
-            .setOptions(
-                CelOptions.current()
-                    .enableTimestampEpoch(true)
-                    .enableStringConversion(false)
-                    .build())
-            .build();
-    CelAbstractSyntaxTree ast = cel.compile(expression).getAst();
-
-    CelEvaluationException e =
-        assertThrows(CelEvaluationException.class, () -> cel.createProgram(ast).eval());
-    assertThat(e).hasMessageThat().contains("No matching overload for function 'string'");
-    assertThat(e.getErrorCode()).isEqualTo(CelErrorCode.OVERLOAD_NOT_FOUND);
-  }
-
-  @Test
-  public void program_stringConcatenationDisabled_throws() throws Exception {
-    Cel cel =
-        CelFactory.standardCelBuilder()
-            .setOptions(CelOptions.current().enableStringConcatenation(false).build())
-            .build();
-    CelAbstractSyntaxTree ast = cel.compile("'foo' + 'bar'").getAst();
-
-    CelEvaluationException e =
-        assertThrows(CelEvaluationException.class, () -> cel.createProgram(ast).eval());
-    assertThat(e).hasMessageThat().contains("No matching overload for function '_+_'");
-    assertThat(e.getErrorCode()).isEqualTo(CelErrorCode.OVERLOAD_NOT_FOUND);
-  }
-
-  @Test
-  public void program_listConcatenationDisabled_throws() throws Exception {
-    Cel cel =
-        CelFactory.standardCelBuilder()
-            .setOptions(CelOptions.current().enableListConcatenation(false).build())
-            .build();
-    CelAbstractSyntaxTree ast = cel.compile("[1] + [2]").getAst();
-
-    CelEvaluationException e =
-        assertThrows(CelEvaluationException.class, () -> cel.createProgram(ast).eval());
-    assertThat(e).hasMessageThat().contains("No matching overload for function '_+_'");
-    assertThat(e.getErrorCode()).isEqualTo(CelErrorCode.OVERLOAD_NOT_FOUND);
-  }
-
   @Test
   public void program_comprehensionDisabled_throws() throws Exception {
     Cel cel =

common/src/main/java/dev/cel/common/CelOptions.java

@@ -117,12 +117,6 @@ public enum ProtoUnsetFieldOptions {
 
   public abstract ProtoUnsetFieldOptions fromProtoUnsetFieldOption();
 
-  public abstract boolean enableStringConversion();
-
-  public abstract boolean enableStringConcatenation();
-
-  public abstract boolean enableListConcatenation();
-
   public abstract boolean enableComprehension();
 
   public abstract int maxRegexProgramSize();
@@ -169,9 +163,6 @@ public static Builder newBuilder() {
         .comprehensionMaxIterations(-1)
         .unwrapWellKnownTypesOnFunctionDispatch(true)
         .fromProtoUnsetFieldOption(ProtoUnsetFieldOptions.BIND_DEFAULT)
-        .enableStringConversion(true)
-        .enableStringConcatenation(true)
-        .enableListConcatenation(true)
         .enableComprehension(true)
         .maxRegexProgramSize(-1);
   }
@@ -494,24 +485,6 @@ public abstract static class Builder {
      */
     public abstract Builder fromProtoUnsetFieldOption(ProtoUnsetFieldOptions value);
 
-    /**
-     * Enables string() overloads for the runtime. This option exists to maintain parity with
-     * cel-cpp interpreter options.
-     */
-    public abstract Builder enableStringConversion(boolean value);
-
-    /**
-     * Enables string concatenation overload for the runtime. This option exists to maintain parity
-     * with cel-cpp interpreter options.
-     */
-    public abstract Builder enableStringConcatenation(boolean value);
-
-    /**
-     * Enables list concatenation overload for the runtime. This option exists to maintain parity
-     * with cel-cpp interpreter options.
-     */
-    public abstract Builder enableListConcatenation(boolean value);
-
     /**
      * Enables comprehension (macros) for the runtime. Setting false has the same effect with
      * assigning 0 for {@link #comprehensionMaxIterations()}. This option exists to maintain parity

runtime/src/main/java/dev/cel/runtime/CelRuntimeImpl.java

@@ -337,20 +337,6 @@ private static void assertAllowedCelOptions(CelOptions celOptions) {
 
       // Disallowed options in favor of subsetting
       String subsettingError = "Subset the environment instead using setStandardFunctions method.";
-      if (!celOptions.enableStringConcatenation()) {
-        throw new IllegalArgumentException(
-            prefix + "enableStringConcatenation cannot be disabled. " + subsettingError);
-      }
-
-      if (!celOptions.enableStringConversion()) {
-        throw new IllegalArgumentException(
-            prefix + "enableStringConversion cannot be disabled. " + subsettingError);
-      }
-
-      if (!celOptions.enableListConcatenation()) {
-        throw new IllegalArgumentException(
-            prefix + "enableListConcatenation cannot be disabled. " + subsettingError);
-      }
 
       if (!celOptions.enableTimestampEpoch()) {
         throw new IllegalArgumentException(

runtime/src/main/java/dev/cel/runtime/CelRuntimeLegacyImpl.java

@@ -45,7 +45,6 @@
 import dev.cel.common.types.CelTypes;
 import dev.cel.common.values.CelValueProvider;
 import dev.cel.common.values.ProtoMessageValueProvider;
-import dev.cel.runtime.standard.AddOperator.AddOverload;
 import dev.cel.runtime.standard.IntFunction.IntOverload;
 import dev.cel.runtime.standard.TimestampFunction.TimestampOverload;
 import java.util.Arrays;
@@ -381,16 +380,6 @@ private ImmutableSet<CelFunctionBinding> newStandardFunctionBindings(
                             return options.enableTimestampEpoch();
                           }
                           break;
-                        case STRING:
-                          return options.enableStringConversion();
-                        case ADD:
-                          if (standardOverload.equals(AddOverload.ADD_STRING)) {
-                            return options.enableStringConcatenation();
-                          }
-                          if (standardOverload.equals(AddOverload.ADD_LIST)) {
-                            return options.enableListConcatenation();
-                          }
-                          break;
                         default:
                           if (!options.enableHeterogeneousNumericComparisons()) {
                             return !CelStandardFunctions.isHeterogeneousComparison(

runtime/src/main/java/dev/cel/runtime/LiteRuntimeImpl.java

@@ -132,24 +132,6 @@ private static void assertAllowedCelOptions(CelOptions celOptions) {
         throw new IllegalArgumentException(
             prefix + "unwrapWellKnownTypesOnFunctionDispatch cannot be disabled.");
       }
-      if (!celOptions.enableStringConcatenation()) {
-        throw new IllegalArgumentException(
-            prefix
-                + "enableStringConcatenation cannot be disabled. Subset the environment instead"
-                + " using setStandardFunctions method.");
-      }
-      if (!celOptions.enableStringConversion()) {
-        throw new IllegalArgumentException(
-            prefix
-                + "enableStringConversion cannot be disabled. Subset the environment instead using"
-                + " setStandardFunctions method.");
-      }
-      if (!celOptions.enableListConcatenation()) {
-        throw new IllegalArgumentException(
-            prefix
-                + "enableListConcatenation cannot be disabled. Subset the environment instead using"
-                + " setStandardFunctions method.");
-      }
     }
 
     @Override
@@ -201,10 +183,7 @@ public CelLiteRuntime build() {
     }
 
     private Builder() {
-      this.celOptions =
-          CelOptions.current()
-              .enableCelValue(true)
-              .build();
+      this.celOptions = CelOptions.current().enableCelValue(true).build();
       this.celValueProvider = (structType, fields) -> Optional.empty();
       this.customFunctionBindings = new HashMap<>();
       this.standardFunctionBuilder = ImmutableSet.builder();

runtime/src/test/java/dev/cel/runtime/CelLiteRuntimeAndroidTest.java

@@ -715,9 +715,6 @@ private enum CelOptionsTestCase {
     CEL_VALUE_DISABLED(newBaseTestOptions().enableCelValue(false).build()),
     UNSIGNED_LONG_DISABLED(newBaseTestOptions().enableUnsignedLongs(false).build()),
     UNWRAP_WKT_DISABLED(newBaseTestOptions().unwrapWellKnownTypesOnFunctionDispatch(false).build()),
-    STRING_CONCAT_DISABLED(newBaseTestOptions().enableStringConcatenation(false).build()),
-    STRING_CONVERSION_DISABLED(newBaseTestOptions().enableStringConversion(false).build()),
-    LIST_CONCATENATION_DISABLED(newBaseTestOptions().enableListConcatenation(false).build()),
     ;
 
     private final CelOptions celOptions;