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//===--- FreestandingMacroExpansion.cpp -----------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/AST/FreestandingMacroExpansion.h"
#include "swift/AST/ASTContext.h"
#include "swift/AST/Decl.h"
#include "swift/AST/Expr.h"
#include "swift/AST/MacroDiscriminatorContext.h"
#include "swift/Basic/Assertions.h"
using namespace swift;
SourceRange MacroExpansionInfo::getSourceRange() const {
SourceLoc endLoc;
if (ArgList && !ArgList->isImplicit())
endLoc = ArgList->getEndLoc();
else if (RightAngleLoc.isValid())
endLoc = RightAngleLoc;
else
endLoc = MacroNameLoc.getEndLoc();
return SourceRange(SigilLoc, endLoc);
}
#define FORWARD_VARIANT(NAME) \
switch (getFreestandingMacroKind()) { \
case FreestandingMacroKind::Expr: \
return cast<MacroExpansionExpr>(this)->NAME(); \
case FreestandingMacroKind::Decl: \
return cast<MacroExpansionDecl>(this)->NAME(); \
}
DeclContext *FreestandingMacroExpansion::getDeclContext() const {
FORWARD_VARIANT(getDeclContext);
}
SourceRange FreestandingMacroExpansion::getSourceRange() const {
FORWARD_VARIANT(getSourceRange);
}
unsigned FreestandingMacroExpansion::getDiscriminator() const {
auto info = getExpansionInfo();
if (info->Discriminator != MacroExpansionInfo::InvalidDiscriminator)
return info->Discriminator;
auto mutableThis = const_cast<FreestandingMacroExpansion *>(this);
auto dc = getDeclContext();
ASTContext &ctx = dc->getASTContext();
auto discriminatorContext =
MacroDiscriminatorContext::getParentOf(mutableThis);
info->Discriminator = ctx.getNextMacroDiscriminator(
discriminatorContext, getMacroName().getBaseName());
assert(info->Discriminator != MacroExpansionInfo::InvalidDiscriminator);
return info->Discriminator;
}
unsigned FreestandingMacroExpansion::getRawDiscriminator() const {
return getExpansionInfo()->Discriminator;
}
ASTNode FreestandingMacroExpansion::getASTNode() {
switch (getFreestandingMacroKind()) {
case FreestandingMacroKind::Expr:
return cast<MacroExpansionExpr>(this);
case FreestandingMacroKind::Decl:
return cast<MacroExpansionDecl>(this);
}
}
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