kickc/src/main/java/dk/camelot64/kickc/passes/Pass1AssertInterrupts.java

package dk.camelot64.kickc.passes;

import dk.camelot64.kickc.model.CompileError;
import dk.camelot64.kickc.model.ControlFlowBlock;
import dk.camelot64.kickc.model.Graph;
import dk.camelot64.kickc.model.Program;
import dk.camelot64.kickc.model.statements.Statement;
import dk.camelot64.kickc.model.statements.StatementCalling;
import dk.camelot64.kickc.model.symbols.Procedure;
import dk.camelot64.kickc.model.types.SymbolType;
import dk.camelot64.kickc.model.values.ProcedureRef;

/** Asserts that interrupts are never called and are not declared inline */
public class Pass1AssertInterrupts extends Pass1Base {

   public Pass1AssertInterrupts(Program program) {
      super(program);
   }

   @Override
   public boolean step() {
      for(Statement statement : getGraph().getAllStatements()) {
         if(statement instanceof StatementCalling) {
            ProcedureRef procedureRef = ((StatementCalling) statement).getProcedure();
            Procedure procedure = getProgramScope().getProcedure(procedureRef);
            if(procedure.getInterruptType() != null) {
               throw new CompileError("Interrupts cannot be called.", statement.getSource());
            }
         }
      }
      for(Procedure procedure : getProgramScope().getAllProcedures(true)) {
         if(procedure.getInterruptType()!=null) {
            if(procedure.isDeclaredInline()) {
               throw new CompileError("Interrupts cannot be inlined. " + procedure.toString());
            }
            if(procedure.getParameters().size()>0) {
               throw new CompileError("Interrupts cannot have parameters. " + procedure.toString());
            }
            if(!SymbolType.VOID.equals(procedure.getReturnType())) {
               throw new CompileError("Interrupts cannot return anything. " + procedure.toString());
            }
         }
      }
      return false;
   }


}