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/*
*/
#include "preproc.hpp"
#include "../ast/ast.hpp"
#include "parseerror.hpp"
#include "common.hpp"
#include <cassert>
AST::Path Parse_Path(TokenStream& lex, bool is_abs, bool generic_ok)
{
AST::Path path;
Token tok;
do
{
tok = lex.getToken();
if(tok.type() == TOK_LT)
{
throw ParseError::Todo("Parse_Path - Generics");
}
if(tok.type() != TOK_IDENT)
throw ParseError::Unexpected(tok);
path.append( tok.str() );
tok = lex.getToken();
} while( tok.type() == TOK_DOUBLE_COLON );
lex.putback(tok);
return path;
}
static const struct {
const char* name;
enum eCoreType type;
} CORETYPES[] = {
{"char", CORETYPE_CHAR},
{"uint", CORETYPE_UINT},
{"int", CORETYPE_INT},
{"u8", CORETYPE_U8},
{"i8", CORETYPE_I8},
{"u16", CORETYPE_U16},
{"i16", CORETYPE_I16},
{"u32", CORETYPE_U32},
{"i32", CORETYPE_I32},
{"u64", CORETYPE_U64},
{"i64", CORETYPE_I64},
{"f32", CORETYPE_F32},
{"f64", CORETYPE_F64}
};
TypeRef Parse_Type(TokenStream& lex)
{
Token tok = lex.getToken();
switch(tok.type())
{
case TOK_IDENT:
// Either a path (with generics)
if( tok.str() == "_" )
return TypeRef();
for(unsigned int i = 0; i < sizeof(CORETYPES)/sizeof(CORETYPES[0]); i ++)
{
if( tok.str() < CORETYPES[i].name )
break;
if( tok.str() == CORETYPES[i].name )
return TypeRef(TypeRef::TagPrimitive(), CORETYPES[i].type);
}
// or a primitive
lex.putback(tok);
return TypeRef(TypeRef::TagPath(), Parse_Path(lex, false, true)); // relative path
case TOK_DOUBLE_COLON:
// Path with generics
//return TypeRef(TypeRef::TagPath(), Parse_Path(lex, true, true));
throw ParseError::Todo("type ::");
case TOK_AMP:
// Reference
tok = lex.getToken();
if( tok.type() == TOK_RWORD_MUT ) {
// Mutable reference
return TypeRef(TypeRef::TagReference(), true, Parse_Type(lex));
}
else {
lex.putback(tok);
// Immutable reference
return TypeRef(TypeRef::TagReference(), false, Parse_Type(lex));
}
break;
case TOK_STAR:
// Pointer
tok = lex.getToken();
switch( tok.type() )
{
case TOK_RWORD_MUT:
// Mutable pointer
return TypeRef(TypeRef::TagPointer(), true, Parse_Type(lex));
case TOK_RWORD_CONST:
// Immutable pointer
return TypeRef(TypeRef::TagPointer(), false, Parse_Type(lex));
default:
throw ParseError::Unexpected(tok, Token(TOK_RWORD_CONST));
}
break;
case TOK_SQUARE_OPEN: {
// Array
TypeRef inner = Parse_Type(lex);
tok = lex.getToken();
if( tok.type() == TOK_COMMA ) {
// Sized array
GET_CHECK_TOK(tok, lex, TOK_DOUBLE_DOT);
AST::Expr array_size = Parse_Expr(lex, true);
GET_CHECK_TOK(tok, lex, TOK_SQUARE_CLOSE);
return TypeRef(TypeRef::TagSizedArray(), inner, array_size);
}
else {
GET_CHECK_TOK(tok, lex, TOK_SQUARE_CLOSE);
return TypeRef(TypeRef::TagUnsizedArray(), inner);
}
break; }
case TOK_PAREN_OPEN: {
::std::vector<TypeRef> types;
if( (tok = lex.getToken()).type() == TOK_PAREN_CLOSE)
return TypeRef(TypeRef::TagTuple(), types);
do
{
TypeRef type = Parse_Type(lex);
types.push_back(type);
} while( (tok = lex.getToken()).type() == TOK_COMMA );
GET_CHECK_TOK(tok, lex, TOK_PAREN_CLOSE);
return TypeRef(TypeRef::TagTuple(), types); }
default:
throw ParseError::Unexpected(tok);
}
}
AST::TypeParams Parse_TypeParams(TokenStream& lex)
{
AST::TypeParams ret;
Token tok;
do {
bool is_lifetime = false;
tok = lex.getToken();
switch(tok.type())
{
case TOK_IDENT:
break;
case TOK_LIFETIME:
is_lifetime = true;
break;
default:
// Oopsie!
throw ParseError::Unexpected(tok);
}
AST::TypeParam param( is_lifetime, tok.str() );
tok = lex.getToken();
if( tok.type() == TOK_COLON )
{
// TODO: Conditions
if( is_lifetime )
{
throw ParseError::Todo("lifetime param conditions");
}
do {
tok = lex.getToken();
if(tok.type() == TOK_LIFETIME)
param.addLifetimeBound(tok.str());
else {
lex.putback(tok);
param.addTypeBound(Parse_Type(lex));
}
tok = lex.getToken();
} while(tok.type() == TOK_PLUS);
}
ret.push_back(param);
} while( tok.type() == TOK_COMMA );
lex.putback(tok);
return ret;
}
void Parse_TypeConds(TokenStream& lex, AST::TypeParams& params)
{
throw ParseError::Todo("type param conditions (where)");
}
AST::Module Parse_ModRoot(bool is_own_file, Preproc& lex)
{
AST::Module mod;
for(;;)
{
bool is_public = false;
Token tok = lex.getToken();
switch(tok.type())
{
case TOK_BRACE_CLOSE:
if( is_own_file )
throw ParseError::Unexpected(tok);
return mod;
case TOK_EOF:
if( !is_own_file )
throw ParseError::Unexpected(tok);
return mod;
case TOK_RWORD_PUB:
assert(!is_public);
is_public = false;
break;
case TOK_RWORD_USE:
mod.add_alias( is_public, Parse_Path(lex, true, false) );
GET_CHECK_TOK(tok, lex, TOK_SEMICOLON);
break;
case TOK_RWORD_CONST: {
GET_CHECK_TOK(tok, lex, TOK_IDENT);
::std::string name = tok.str();
GET_CHECK_TOK(tok, lex, TOK_COLON);
TypeRef type = Parse_Type(lex);
GET_CHECK_TOK(tok, lex, TOK_EQUAL);
AST::Expr val = Parse_Expr(lex, true);
GET_CHECK_TOK(tok, lex, TOK_SEMICOLON);
mod.add_constant(is_public, name, type, val);
break; }
case TOK_RWORD_STATIC: {
tok = lex.getToken();
bool is_mut = false;
if(tok.type() == TOK_RWORD_MUT) {
is_mut = true;
tok = lex.getToken();
}
if(tok.type() != TOK_IDENT)
throw ParseError::Unexpected(tok, Token(TOK_IDENT));
::std::string name = tok.str();
GET_CHECK_TOK(tok, lex, TOK_COLON);
TypeRef type = Parse_Type(lex);
GET_CHECK_TOK(tok, lex, TOK_EQUAL);
AST::Expr val = Parse_Expr(lex, true);
GET_CHECK_TOK(tok, lex, TOK_SEMICOLON);
mod.add_global(is_public, is_mut, name, type, val);
break; }
case TOK_RWORD_FN:
throw ParseError::Todo("modroot fn");
case TOK_RWORD_STRUCT: {
GET_CHECK_TOK(tok, lex, TOK_IDENT);
::std::string name = tok.str();
tok = lex.getToken();
if( tok.type() == TOK_LT )
{
AST::TypeParams params = Parse_TypeParams(lex);
GET_CHECK_TOK(tok, lex, TOK_GT);
tok = lex.getToken();
if(tok.type() == TOK_RWORD_WHERE)
{
Parse_TypeConds(lex, params);
tok = lex.getToken();
}
}
if(tok.type() == TOK_PAREN_OPEN)
{
throw ParseError::Todo("tuple struct");
}
else if(tok.type() == TOK_SEMICOLON)
{
throw ParseError::Todo("unit-like struct");
}
else if(tok.type() == TOK_BRACE_OPEN)
{
throw ParseError::Todo("full struct");
}
else
{
throw ParseError::Unexpected(tok);
}
throw ParseError::Todo("modroot struct"); }
case TOK_RWORD_ENUM:
throw ParseError::Todo("modroot enum");
case TOK_RWORD_IMPL:
throw ParseError::Todo("modroot impl");
case TOK_RWORD_TRAIT:
throw ParseError::Todo("modroot trait");
default:
throw ParseError::Unexpected(tok);
}
}
}
void Parse_Crate(::std::string mainfile)
{
Preproc lex(mainfile);
AST::Module rootmodule = Parse_ModRoot(true, lex);
}
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