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package ceylon.language;

import com.redhat.ceylon.compiler.java.metadata.Ceylon;
import com.redhat.ceylon.compiler.java.metadata.Ignore;
import com.redhat.ceylon.compiler.java.metadata.TypeParameter;
import com.redhat.ceylon.compiler.java.metadata.TypeParameters;
import com.redhat.ceylon.compiler.java.metadata.Variance;

@Ceylon(major = 8)
@TypeParameters({
	@TypeParameter(value="Return", variance=Variance.OUT),
	@TypeParameter(value="Arguments", satisfies="ceylon.language::Sequential", variance=Variance.IN)
})
public interface Callable {
    
    /** 
     * Make a nullary invocation of this Callable declared with fixed arity.
     */
    @Ignore
    public Return $call$();
    
    /** 
     * Make a nullary invocation of this Callable declared with variable arity 
     * @throws UnsupportedOperationException If this callable is not variadic 
     */
    @Ignore
    public Return $callvariadic$();
    @Ignore
    public Return $callvariadic$(Sequential varargs);
    
    /** Make a unary invocation of this Callable declared with fixed arity */
    @Ignore
    public Return $call$(java.lang.Object arg0);
    
    /** 
     * Make a unary invocation of this Callable declared with variable arity 
     * @throws UnsupportedOperationException If this callable is not variadic
     */
    @Ignore
    public Return $callvariadic$(java.lang.Object arg0);
    @Ignore
    public Return $callvariadic$(java.lang.Object arg0, Sequential varargs);
    
    /** Make a binary invocation of this Callable declared with fixed arity */
    @Ignore
    public Return $call$(java.lang.Object arg0, java.lang.Object arg1);
    
    /** 
     * Make a binary invocation of this Callable declared with variable arity 
     * @throws UnsupportedOperationException If this callable is not variadic
     */
    @Ignore
    public Return $callvariadic$(java.lang.Object arg0, java.lang.Object arg1);
    @Ignore
    public Return $callvariadic$(java.lang.Object arg0, java.lang.Object arg1, Sequential varargs);
    
    /** Make a ternary invocation of this Callable declared with fixed arity */
    @Ignore
    public Return $call$(java.lang.Object arg0, java.lang.Object arg1, java.lang.Object arg2);
    
    /** 
     * Make a ternary invocation of this Callable declared with variable arity
     * @throws UnsupportedOperationException If this callable is not variadic 
     */
    @Ignore
    public Return $callvariadic$(java.lang.Object arg0, java.lang.Object arg1, java.lang.Object arg2);
    @Ignore
    public Return $callvariadic$(java.lang.Object arg0, java.lang.Object arg1, java.lang.Object arg2, Sequential varargs);
    
    /** 
     * Make a fixed arity invocation of this Callable declared with fixed arity 
     * @throws UnsupportedOperationException If this callable is not variadic
     */
    @Ignore
    public Return $call$(java.lang.Object... args);
    
    /** 
     * Make a variable varity invocation of this Callable declared with variable arity 
     * @throws UnsupportedOperationException If this callable is not variadic
     */
    @Ignore
    public Return $callvariadic$(java.lang.Object... argsAndVarargs);

    /**
     * @return the index of the variadic parameter if any, -1 otherwise.
     */
    @Ignore
    public short $getVariadicParameterIndex$();

}