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//===--- VariantValue.cpp - Polymorphic value type -*- C++ -*-===/
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief Polymorphic value type.
///
//===----------------------------------------------------------------------===//
#include "clang/ASTMatchers/Dynamic/VariantValue.h"
#include "clang/Basic/LLVM.h"
namespace clang {
namespace ast_matchers {
namespace dynamic {
VariantValue::VariantValue(const VariantValue &Other) : Type(VT_Nothing) {
*this = Other;
}
VariantValue::VariantValue(unsigned Unsigned) : Type(VT_Nothing) {
setUnsigned(Unsigned);
}
VariantValue::VariantValue(const std::string &String) : Type(VT_Nothing) {
setString(String);
}
VariantValue::VariantValue(const DynTypedMatcher &Matcher) : Type(VT_Nothing) {
setMatcher(Matcher);
}
VariantValue::~VariantValue() { reset(); }
VariantValue &VariantValue::operator=(const VariantValue &Other) {
if (this == &Other) return *this;
reset();
switch (Other.Type) {
case VT_Unsigned:
setUnsigned(Other.getUnsigned());
break;
case VT_String:
setString(Other.getString());
break;
case VT_Matcher:
setMatcher(Other.getMatcher());
break;
case VT_Nothing:
Type = VT_Nothing;
break;
}
return *this;
}
void VariantValue::reset() {
switch (Type) {
case VT_String:
delete Value.String;
break;
case VT_Matcher:
delete Value.Matcher;
break;
// Cases that do nothing.
case VT_Unsigned:
case VT_Nothing:
break;
}
Type = VT_Nothing;
}
bool VariantValue::isUnsigned() const {
return Type == VT_Unsigned;
}
unsigned VariantValue::getUnsigned() const {
assert(isUnsigned());
return Value.Unsigned;
}
void VariantValue::setUnsigned(unsigned NewValue) {
reset();
Type = VT_Unsigned;
Value.Unsigned = NewValue;
}
bool VariantValue::isString() const {
return Type == VT_String;
}
const std::string &VariantValue::getString() const {
assert(isString());
return *Value.String;
}
void VariantValue::setString(const std::string &NewValue) {
reset();
Type = VT_String;
Value.String = new std::string(NewValue);
}
bool VariantValue::isMatcher() const {
return Type == VT_Matcher;
}
const DynTypedMatcher &VariantValue::getMatcher() const {
assert(isMatcher());
return *Value.Matcher;
}
void VariantValue::setMatcher(const DynTypedMatcher &NewValue) {
reset();
Type = VT_Matcher;
Value.Matcher = NewValue.clone();
}
void VariantValue::takeMatcher(DynTypedMatcher *NewValue) {
reset();
Type = VT_Matcher;
Value.Matcher = NewValue;
}
std::string VariantValue::getTypeAsString() const {
switch (Type) {
case VT_String: return "String";
case VT_Matcher:
return (Twine("Matcher<") + getMatcher().getSupportedKind().asStringRef() +
">").str();
case VT_Unsigned: return "Unsigned";
case VT_Nothing: return "Nothing";
}
llvm_unreachable("Invalid Type");
}
} // end namespace dynamic
} // end namespace ast_matchers
} // end namespace clang
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