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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* ast/pattern.cpp
* - AST::Pattern support/implementation code
*/
#include "../common.hpp"
#include "ast.hpp"
#include "pattern.hpp"
namespace AST {
::std::ostream& operator<<(::std::ostream& os, const Pattern::Value& val)
{
TU_MATCH(Pattern::Value, (val), (e),
(Invalid,
os << "/*BAD PAT VAL*/";
),
(Integer,
switch(e.type)
{
case CORETYPE_BOOL:
os << (e.value ? "true" : "false");
break;
case CORETYPE_F32:
case CORETYPE_F64:
BUG(Span(), "Hit F32/f64 in printing pattern literal");
break;
default:
os << e.value;
break;
}
),
(Float,
switch(e.type)
{
case CORETYPE_BOOL:
os << (e.value ? "true" : "false");
break;
case CORETYPE_ANY:
case CORETYPE_F32:
case CORETYPE_F64:
os << e.value;
break;
default:
BUG(Span(), "Hit integer in printing pattern literal");
break;
}
),
(String,
os << "\"" << e << "\"";
),
(ByteString,
os << "b\"" << e.v << "\"";
),
(Named,
os << e;
)
)
return os;
}
::std::ostream& operator<<(::std::ostream& os, const Pattern::TuplePat& val)
{
if( val.has_wildcard )
{
os << val.start;
os << ".., ";
os << val.end;
}
else
{
os << val.start;
assert(val.end.size() == 0);
}
return os;
}
::std::ostream& operator<<(::std::ostream& os, const Pattern& pat)
{
os << "Pattern(";
if( pat.m_binding.is_valid() ) {
os << pat.m_binding.m_name << " @ ";
}
TU_MATCH(Pattern::Data, (pat.m_data), (ent),
(MaybeBind,
os << ent.name << "?";
),
(Macro,
os << *ent.inv;
),
(Any,
os << "_";
),
(Box,
os << "box " << *ent.sub;
),
(Ref,
os << "&" << (ent.mut ? "mut " : "") << *ent.sub;
),
(Value,
os << ent.start;
if( ! ent.end.is_Invalid() )
os << " ... " << ent.end;
),
(Tuple,
os << "(" << ent << ")";
),
(StructTuple,
os << ent.path << " (" << ent.tup_pat << ")";
),
(Struct,
os << ent.path << " {" << ent.sub_patterns << "}";
),
(Slice,
os << "[";
bool needs_comma = false;
if(ent.leading.size()) {
os << ent.leading;
needs_comma = true;
}
if(ent.extra_bind.size() > 0) {
if( needs_comma ) {
os << ", ";
}
if(ent.extra_bind != "_")
os << ent.extra_bind;
os << "..";
needs_comma = true;
}
if(ent.trailing.size()) {
if( needs_comma ) {
os << ", ";
}
os << ent.trailing;
}
os << "]";
)
)
os << ")";
return os;
}
void operator%(Serialiser& s, Pattern::Value::Tag c) {
}
void operator%(::Deserialiser& s, Pattern::Value::Tag& c) {
}
void operator%(::Serialiser& s, const Pattern::Value& v) {
}
void operator%(::Deserialiser& s, Pattern::Value& v) {
}
void operator%(Serialiser& s, Pattern::Data::Tag c) {
}
void operator%(::Deserialiser& s, Pattern::Data::Tag& c) {
}
Pattern::~Pattern()
{
}
AST::Pattern AST::Pattern::clone() const
{
AST::Pattern rv;
rv.m_span = m_span;
rv.m_binding = m_binding;
struct H {
static ::std::unique_ptr<Pattern> clone_sp(const ::std::unique_ptr<Pattern>& p) {
return ::std::make_unique<Pattern>( p->clone() );
}
static ::std::vector<Pattern> clone_list(const ::std::vector<Pattern>& list) {
::std::vector<Pattern> rv;
rv.reserve(list.size());
for(const auto& p : list)
rv.push_back( p.clone() );
return rv;
}
static TuplePat clone_tup(const TuplePat& p) {
return TuplePat {
H::clone_list(p.start),
p.has_wildcard,
H::clone_list(p.end)
};
}
static AST::Pattern::Value clone_val(const AST::Pattern::Value& v) {
TU_MATCH(::AST::Pattern::Value, (v), (e),
(Invalid, return Value(e);),
(Integer, return Value(e);),
(Float, return Value(e);),
(String, return Value(e);),
(ByteString, return Value(e);),
(Named, return Value::make_Named( AST::Path(e) );)
)
throw "";
}
};
TU_MATCH(Pattern::Data, (m_data), (e),
(Any,
rv.m_data = Data::make_Any(e);
),
(MaybeBind,
rv.m_data = Data::make_MaybeBind(e);
),
(Macro,
rv.m_data = Data::make_Macro({ ::std::make_unique<AST::MacroInvocation>( e.inv->clone() ) });
),
(Box,
rv.m_data = Data::make_Box({ H::clone_sp(e.sub) });
),
(Ref,
rv.m_data = Data::make_Ref({ e.mut, H::clone_sp(e.sub) });
),
(Value,
rv.m_data = Data::make_Value({ H::clone_val(e.start), H::clone_val(e.end) });
),
(Tuple,
rv.m_data = Data::make_Tuple({ H::clone_tup(e) });
),
(StructTuple,
rv.m_data = Data::make_StructTuple({ ::AST::Path(e.path), H::clone_tup(e.tup_pat) });
),
(Struct,
::std::vector< ::std::pair< ::std::string, Pattern> > sps;
for(const auto& sp : e.sub_patterns)
sps.push_back( ::std::make_pair(sp.first, sp.second.clone()) );
rv.m_data = Data::make_Struct({ ::AST::Path(e.path), mv$(sps) });
),
(Slice,
rv.m_data = Data::make_Slice({ H::clone_list(e.leading), e.extra_bind, H::clone_list(e.trailing) });
)
)
return rv;
}
#define _D(VAR, ...) case Pattern::Data::TAG_##VAR: { m_data = Pattern::Data::make_##VAR({}); auto& ent = m_data.as_##VAR(); (void)&ent; __VA_ARGS__ } break;
SERIALISE_TYPE(Pattern::, "Pattern", {
},{
});
}
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