skia2/include/sksl/DSLCase.h
Ethan Nicholas daed2592bb Made SkSL DSL into public API
In addition to the unsurprising changes to eliminate references to
src/, we also had to tighten up some C++17-isms as they are not
permitted in public headers.

Change-Id: Ie5005a33d7a135e69fb66beca5e7a5f960dbd453
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/378496
Reviewed-by: Brian Osman <brianosman@google.com>
2021-03-04 21:03:58 +00:00

60 lines
1.3 KiB
C++

/*
* Copyright 2021 Google LLC.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKSL_DSL_CASE
#define SKSL_DSL_CASE
#include "include/private/SkSLDefines.h"
#include "include/sksl/DSLExpression.h"
#include "include/sksl/DSLStatement.h"
#include <memory>
namespace SkSL {
class Statement;
namespace dsl {
class DSLCase {
public:
// An empty expression means 'default:'.
template<class... Statements>
DSLCase(DSLExpression value, Statements... statements)
: fValue(std::move(value)) {
fStatements.reserve_back(sizeof...(statements));
// in C++17, we could just do:
// (fStatements.push_back(DSLStatement(std::move(statements)).release()), ...);
int unused[] =
{0,
(static_cast<void>(fStatements.push_back(DSLStatement(std::move(statements)).release())),
0)...};
static_cast<void>(unused);
}
DSLCase(DSLCase&&);
DSLCase(DSLExpression value, SkSL::StatementArray statements);
~DSLCase();
void append(DSLStatement stmt);
private:
DSLExpression fValue;
SkSL::StatementArray fStatements;
template<class... Cases>
friend DSLPossibleStatement Switch(DSLExpression value, Cases... cases);
};
} // namespace dsl
} // namespace SkSL
#endif