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#ifndef _AST__PATTERN_HPP_INCLUDED_
#define _AST__PATTERN_HPP_INCLUDED_
#include <vector>
#include <memory>
#include <string>
namespace AST {
using ::std::unique_ptr;
using ::std::move;
class ExprNode;
class Pattern:
public Serialisable
{
public:
enum BindType {
MAYBE_BIND,
ANY,
VALUE,
TUPLE,
TUPLE_STRUCT,
};
private:
BindType m_class;
::std::string m_binding;
Path m_path;
unique_ptr<ExprNode> m_node;
::std::vector<Pattern> m_sub_patterns;
public:
Pattern():
m_class(ANY)
{}
struct TagBind {};
Pattern(TagBind, ::std::string name):
m_class(ANY),
m_binding(name)
{}
struct TagMaybeBind {};
Pattern(TagMaybeBind, ::std::string name):
m_class(MAYBE_BIND),
m_binding(name)
{}
struct TagValue {};
Pattern(TagValue, unique_ptr<ExprNode> node):
m_class(VALUE),
m_node( ::std::move(node) )
{}
struct TagTuple {};
Pattern(TagTuple, ::std::vector<Pattern> sub_patterns):
m_class(TUPLE),
m_sub_patterns( ::std::move(sub_patterns) )
{}
struct TagEnumVariant {};
Pattern(TagEnumVariant, Path path, ::std::vector<Pattern> sub_patterns):
m_class(TUPLE_STRUCT),
m_path( ::std::move(path) ),
m_sub_patterns( ::std::move(sub_patterns) )
{}
// Mutators
void set_bind(::std::string name) {
m_binding = name;
}
// Accessors
const ::std::string& binding() const { return m_binding; }
BindType type() const { return m_class; }
ExprNode& node() { return *m_node; }
const ExprNode& node() const { return *m_node; }
Path& path() { return m_path; }
const Path& path() const { return m_path; }
::std::vector<Pattern>& sub_patterns() { return m_sub_patterns; }
const ::std::vector<Pattern>& sub_patterns() const { return m_sub_patterns; }
friend ::std::ostream& operator<<(::std::ostream& os, const Pattern& pat);
SERIALISABLE_PROTOTYPES();
};
};
#endif
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