/// Return the range of indexes for the given tuple type element.
static std::pair<unsigned,unsigned>
getElementRange(CanTupleType tupleType, unsigned eltIndex) {
assert(eltIndex < tupleType->getNumElements());
unsigned begin = 0;
for (unsigned i = 0; i < eltIndex; ++i) {
begin += getRValueSize(tupleType.getElementType(i));
}
unsigned end = begin + getRValueSize(tupleType.getElementType(eltIndex));
return { begin, end };
}
clang::CanQualType GenClangType::visitTupleType(CanTupleType type) {
unsigned e = type->getNumElements();
if (e == 0)
return getClangASTContext().VoidTy;
CanType eltTy = type.getElementType(0);
for (unsigned i = 1; i < e; i++) {
assert(eltTy == type.getElementType(i) &&
"Only tuples where all element types are equal "
"map to fixed-size arrays");
}
auto clangEltTy = Converter.convert(IGM, eltTy);
if (!clangEltTy) return clang::CanQualType();
APInt size(32, e);
auto &ctx = getClangASTContext();
return ctx.getCanonicalType(
ctx.getConstantArrayType(clangEltTy, size,
clang::ArrayType::Normal, 0));
llvm_unreachable("Unexpected tuple type in Clang type generation!");
}
