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// Copyright 2020 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_WRITER_MSL_GENERATOR_IMPL_H_
#define SRC_WRITER_MSL_GENERATOR_IMPL_H_
#include <sstream>
#include <string>
#include "src/ast/literal.h"
#include "src/ast/module.h"
#include "src/ast/scalar_constructor_expression.h"
#include "src/ast/type_constructor_expression.h"
#include "src/writer/text_generator.h"
namespace tint {
namespace writer {
namespace msl {
/// Implementation class for WGSL generator
class GeneratorImpl : public TextGenerator {
public:
/// Constructor
GeneratorImpl();
~GeneratorImpl();
/// Generates the result data
/// @param module the module to generate
/// @returns true on successful generation; false otherwise
bool Generate(const ast::Module& module);
/// Handles generating an as expression
/// @param expr the as expression
/// @returns true if the as was emitted
bool EmitAs(ast::AsExpression* expr);
/// Handles an assignment statement
/// @param stmt the statement to emit
/// @returns true if the statement was emitted successfully
bool EmitAssign(ast::AssignmentStatement* stmt);
/// Handles generating a binary expression
/// @param expr the binary expression
/// @returns true if the expression was emitted, false otherwise
bool EmitBinary(ast::BinaryExpression* expr);
/// Handles generating a cast expression
/// @param expr the cast expression
/// @returns true if the cast was emitted
bool EmitCast(ast::CastExpression* expr);
/// Handles generating constructor expressions
/// @param expr the constructor expression
/// @returns true if the expression was emitted
bool EmitConstructor(ast::ConstructorExpression* expr);
/// Handles generating an else statement
/// @param stmt the statement to emit
/// @returns true if the statement was emitted
bool EmitElse(ast::ElseStatement* stmt);
/// Handles generate an Expression
/// @param expr the expression
/// @returns true if the expression was emitted
bool EmitExpression(ast::Expression* expr);
/// Handles generating a function
/// @param func the function to generate
/// @returns true if the function was emitted
bool EmitFunction(ast::Function* func);
/// Handles generating an identifier expression
/// @param expr the identifier expression
/// @returns true if the identifeir was emitted
bool EmitIdentifier(ast::IdentifierExpression* expr);
/// Handles an if statement
/// @param stmt the statement to emit
/// @returns true if the statement was successfully emitted
bool EmitIf(ast::IfStatement* stmt);
/// Handles generating a kill statement
/// @param stmt the kill statement
/// @returns true if the statement was successfully emitted
bool EmitKill(ast::KillStatement* stmt);
/// Handles a literal
/// @param lit the literal to emit
/// @returns true if the literal was successfully emitted
bool EmitLiteral(ast::Literal* lit);
/// Handles return statements
/// @param stmt the statement to emit
/// @returns true if the statement was successfully emitted
bool EmitReturn(ast::ReturnStatement* stmt);
/// Handles generating a scalar constructor
/// @param expr the scalar constructor expression
/// @returns true if the scalar constructor is emitted
bool EmitScalarConstructor(ast::ScalarConstructorExpression* expr);
/// Handles emitting a pipeline stage name
/// @param stage the stage to emit
void EmitStage(ast::PipelineStage stage);
/// Handles a brace-enclosed list of statements.
/// @param statements the statements to output
/// @returns true if the statements were emitted
bool EmitStatementBlock(const ast::StatementList& statements);
/// Handles a brace-enclosed list of statements and trailing newline.
/// @param statements the statements to output
/// @returns true if the statements were emitted
bool EmitStatementBlockAndNewline(const ast::StatementList& statements);
/// Handles statement
/// @param stmt the statement to emit
/// @returns true if the statement was emitted
bool EmitStatement(ast::Statement* stmt);
/// Handles generating type
/// @param type the type to generate
/// @param name the name of the variable, only used for array emission
/// @returns true if the type is emitted
bool EmitType(ast::type::Type* type, const std::string& name);
/// Handles emitting a type constructor
/// @param expr the type constructor expression
/// @returns true if the constructor is emitted
bool EmitTypeConstructor(ast::TypeConstructorExpression* expr);
/// Handles a unary op expression
/// @param expr the expression to emit
/// @returns true if the expression was emitted
bool EmitUnaryOp(ast::UnaryOpExpression* expr);
private:
const ast::Module* module_ = nullptr;
};
} // namespace msl
} // namespace writer
} // namespace tint
#endif // SRC_WRITER_MSL_GENERATOR_IMPL_H_