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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "spannode.h"
#include "spantreevisitor.h"
#include "alternatespanlist.h"
#include <vespa/vespalib/stllike/asciistream.h>
namespace document {
namespace {
class ToStringVisitor : public SpanTreeVisitor {
public:
ToStringVisitor();
~ToStringVisitor();
vespalib::stringref str() const { return _os.str(); }
private:
vespalib::asciistream _os;
vespalib::string _indent;
void newline() {
_os << "\n" << _indent;
}
void visitChildren(const SpanList & list) {
for (const SpanNode * node : list) {
newline();
node->accept(*this);
}
}
void visitChildren(const SimpleSpanList & list) {
for (const Span & node : list) {
newline();
node.accept(*this);
}
}
void visit(const Span & span) override {
_os << "Span(" << span.from() << ", " << span.length() << ")";
}
void visit(const SpanList & list) override {
_os << "SpanList(";
if (list.size() > 1) {
vespalib::string oldIndent(_indent);
_indent += " ";
visitChildren(list);
_indent = oldIndent;
newline();
} else {
(*list.begin())->accept(*this);
}
_os << ")";
}
void visit(const SimpleSpanList & list) override {
_os << "SimpleSpanList(";
if (list.size() > 1) {
vespalib::string oldIndent(_indent);
_indent += " ";
visitChildren(list);
_indent = oldIndent;
newline();
} else {
visit(*list.begin());
}
_os << ")";
}
void visit(const AlternateSpanList & list) override {
_os << "AlternateSpanList(";
vespalib::string oldIndent(_indent);
_indent += " ";
for (size_t i = 0; i < list.getNumSubtrees(); ++i) {
newline();
_os << "Probability " << list.getProbability(i) << " : ";
visit(list.getSubtree(i));
}
_indent = oldIndent;
newline();
_os << ")";
}
};
ToStringVisitor::ToStringVisitor() : _os(), _indent() { }
ToStringVisitor::~ToStringVisitor() { }
}
vespalib::string
SpanNode::toString() const {
ToStringVisitor os;
accept(os);
return os.str();
}
std::ostream & operator << (std::ostream & os, const SpanNode & node) {
return os << node.toString();
}
}
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