I don't understand the type of temp var. ex: I register a collection of formatted functions. r = engine->RegisterObjectMethod("string", "string@ formatted(const string& in, const int)", asMETHOD(asString, formattedINT), asCALL_THISCALL); ASSERT( r >= 0 ); r = engine->RegisterObjectMethod("string", "string@ formatted(const string& in, const float)", asMETHOD(asString, formattedFLOAT), asCALL_THISCALL); ASSERT( r >= 0 ); r = engine->RegisterObjectMethod("string", "string@ formatted(const string& in, const uint)", asMETHOD(asString, formattedUINT), asCALL_THISCALL); ASSERT( r >= 0 ); r = engine->RegisterObjectMethod("string", "string@ formatted(const string& in, const double)", asMETHOD(asString, formattedDOUBLE), asCALL_THISCALL); ASSERT( r >= 0 ); and in script: formatted("%.0f", int(5-10)*(100/255.0)); ==> -2, right! formatted("%.0f", (5-10)*(100/255.0)); ==> 1684300898, error! formatted("%.0f", float(5-10)*(100/255.0)); ==> 1684300898, error! formatted("%.0f", double(5-10)*(100/255.0)); ==> 1684300898, error! formatted("%.0f", float(-5)*(100/255.0)); ==> -2, right! that is , the temp variable is always use uint to reserve the value, and the double(), float() constructor doesn't convert it to signed value. These behavior of type conversion make me confused.

Interesting, the simplest angelscript code could demo this is like this:

// as codevoid fun(){   float tmp = float(5-10);}

It seems a issue in asCCompiler::CompileMathOperator(...)in as_compiler.cpp:

asCCompiler::CompileMathOperator(...)...        if( lctx->type.dataType.IsIntegerType() ||            lctx->type.dataType.IsUnsignedType() )        {            if( lctx->type.dataType.GetSizeInMemoryDWords() == 1 )            {                int v = 0;                if( op == ttPlus )                    v = lctx->type.intValue + rctx->type.intValue;                else if( op == ttMinus )                    v = lctx->type.intValue - rctx->type.intValue;                else if( op == ttStar )                    v = lctx->type.intValue * rctx->type.intValue;                else if( op == ttSlash )                {                    if( rctx->type.intValue == 0 )                        v = 0;                    else                        v = lctx->type.intValue / rctx->type.intValue;                }                else if( op == ttPercent )                {                    if( rctx->type.intValue == 0 )                        v = 0;                    else                        v = lctx->type.intValue % rctx->type.intValue;                }                                // v's value is -5, it is an Integer, so ctx->type should be Integer and                // v should assign to ctx->type.intValue,                // but here it is set to Unsigned Integer                ctx->type.SetConstantDW(lctx->type.dataType, v);            }...