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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_TINT_LANG_WGSL_AST_DISABLE_VALIDATION_ATTRIBUTE_H_
#define SRC_TINT_LANG_WGSL_AST_DISABLE_VALIDATION_ATTRIBUTE_H_
#include <string>
#include "src/tint/lang/wgsl/ast/internal_attribute.h"
namespace tint::ast {
/// Enumerator of validation features that can be disabled with a
/// DisableValidationAttribute attribute.
enum class DisabledValidation {
/// When applied to a function, the validator will not complain there is no body to a function.
kFunctionHasNoBody,
/// When applied to a module-scoped variable, the validator will not complain if two resource
/// variables have the same binding points.
kBindingPointCollision,
/// When applied to a variable, the validator will not complain about the declared address
/// space.
kIgnoreAddressSpace,
/// When applied to an entry-point function parameter, the validator will not check for entry IO
/// attributes.
kEntryPointParameter,
/// When applied to a function parameter, the parameter will not be validated.
kFunctionParameter,
/// When applied to a member attribute, a stride attribute may be applied to non-array types.
kIgnoreStrideAttribute,
/// When applied to a pointer function parameter, the validator will not require a function call
/// argument passed for that parameter to have a certain form.
kIgnoreInvalidPointerArgument,
/// When applied to a function declaration, the validator will not complain if multiple
/// pointer arguments alias when that function is called.
kIgnorePointerAliasing,
/// When applied to a struct, validation of max number of members is skipped.
kIgnoreStructMemberLimit,
};
/// An internal attribute used to tell the validator to ignore specific
/// violations. Typically generated by transforms that need to produce ASTs that
/// would otherwise cause validation errors.
class DisableValidationAttribute final
: public utils::Castable<DisableValidationAttribute, InternalAttribute> {
public:
/// Constructor
/// @param pid the identifier of the program that owns this node
/// @param nid the unique node identifier
/// @param validation the validation to disable
explicit DisableValidationAttribute(GenerationID pid,
NodeID nid,
DisabledValidation validation);
/// Destructor
~DisableValidationAttribute() override;
/// @return a short description of the internal attribute which will be
/// displayed in WGSL as `@internal(<name>)` (but is not parsable).
std::string InternalName() const override;
/// Performs a deep clone of this object using the CloneContext `ctx`.
/// @param ctx the clone context
/// @return the newly cloned object
const DisableValidationAttribute* Clone(CloneContext* ctx) const override;
/// The validation that this attribute disables
const DisabledValidation validation;
};
} // namespace tint::ast
#endif // SRC_TINT_LANG_WGSL_AST_DISABLE_VALIDATION_ATTRIBUTE_H_