fixed some compiler errors

compiler/src/prog8/ast/processing/AstChecker.kt

@@ -376,6 +376,8 @@ internal class AstChecker(private val program: Program,
     }
 
     override fun visit(assignTarget: AssignTarget) {
+        super.visit(assignTarget)
+
         val memAddr = assignTarget.memoryAddress?.addressExpression?.constValue(program)?.number?.toInt()
         if (memAddr != null) {
             if (memAddr < 0 || memAddr >= 65536)

compiler/src/prog8/ast/processing/IAstModifyingVisitor.kt

@@ -172,8 +172,6 @@ interface IAstModifyingVisitor {
         val ident = arrayIndexedExpression.identifier.accept(this)
         if(ident is IdentifierReference)
             arrayIndexedExpression.identifier = ident
-        else
-            throw FatalAstException("can't change class of indexed identifier")
         arrayIndexedExpression.arrayspec.accept(this)
         return arrayIndexedExpression
     }

compiler/src/prog8/compiler/target/c64/codegen2/AsmGen2.kt

@@ -1436,7 +1436,12 @@ $endLabel""")
                         if(incr)
                             out(" inc  $what |  bne  + |  inc  $what+1 |+")
                         else
-                            out(" lda  $what |  bne  + |  dec  $what+1 |+ |  dec  $what")
+                            out("""
+        lda  $what
+        bne  +
+        dec  $what+1
++       dec  $what 
+""")
                     }
                     DataType.FLOAT -> {
                         out("  lda  #<$what |  ldy  #>$what")

compiler/src/prog8/compiler/target/c64/codegen2/BuiltinFunctionsAsmGen.kt

@@ -46,7 +46,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program,
                 if(arg is NumericLiteralValue)
                     throw AssemblyError("should have been const-folded")
                 if(arg is IdentifierReference) {
-                    val sourceName = arg.nameInSource.joinToString(".")
+                    val sourceName = asmgen.asmIdentifierName(arg)
                     asmgen.out("  lda  $sourceName+1 |  sta  $ESTACK_LO_HEX,x |  dex")
                 } else {
                     asmgen.translateExpression(arg)

compiler/src/prog8/optimizer/ConstantFolding.kt

@@ -234,8 +234,6 @@ class ConstantFolding(private val program: Program) : IAstModifyingVisitor {
                     }
                 }
             }
-        } else {
-            throw FatalAstException("can't find function ${functionCall.target}")
         }
     }
 

examples/test.p8

@@ -25,7 +25,7 @@ main {
         Y=100
         Y++
         check_ub(Y, 101)
-        check_fl(fl, 100.99)        ; @todo CLOBBERS OTHER VARS
+        check_fl(fl, 100.99)
         check_b(bb, -99)
         check_uw(uw, 2001)
         check_w(ww, -999)
@@ -40,13 +40,12 @@ main {
         Y=100
         Y--
         check_ub(Y, 99)
-        check_fl(fl, 99.99)        ; @todo CLOBBERS OTHER VARS
+        check_fl(fl, 99.99)
         check_b(bb, -100)
         check_uw(uw, 2000)
         check_w(ww, -1000)
 
         @($0400+39) = X
-        ;c64.Screen[39] = X      ; @todo compiler error
     }
 
     sub check_ub(ubyte value, ubyte expected) {