Goose  Artifact [286e5ac2f8]

Artifact 286e5ac2f86ee5d3fe46abc24cf4022e75b7f906d29c2795b21035d8fc5cc823:

• File bs/builtins/api/compiler.cpp — part of check-in [47708770e6] at 2019-04-13 22:03:00 on branch trunk — api: added a builtin Execute command, which executes the specified file. Also added the possibility to optionally return an error code. (user: achavasse size: 1493)

#include "builtins/builtins.h"
#include "parse/parse.h"
#include "execute/execute.h"

using namespace empathy;

namespace empathy::builtins
{
    void SetupApiCompiler( Env& e )
    {
        auto pEnv = e.shared_from_this();

        RegisterBuiltinFunc< uint64_t ( string ) >( e, "ExecuteFile"_sid,
            [pEnv]( const string& filename ) -> uint64_t
            {
                auto pFN = make_shared< string >( filename );

                ifstream sourcefile( pFN->c_str() );
                if( !sourcefile.good() )
                {
                    cout << "can't open '" << *pFN << "'\n";
                    return 0;
                }

                sema::Context c( pEnv, TVEC( TSID( e0 ) ), GetValueType< uint64_t >() );

                auto r = make_shared< parse::Resolver >( make_shared< lex::Lexer >( sourcefile, pFN ), c );
                parse::Parser p( r );

                auto cfgBuilder = make_shared< sema::CFGBuilder >();
                p.setCFGBuilder( cfgBuilder );
                p.setCurrentBB( cfgBuilder->entryBB() );

                p.parseSequence();

                if( !r->eos() )
                {
                    cout << "syntax error.\n";
                    return 0;
                }

                execute::VM vm;
                auto result = vm.execute( cfgBuilder->entryBB() );
                if( !result )
                    return 1;

                return *FromValue< uint64_t >( *result );
            } );
    }
}