org.vishia.util

Interface CalculatorExpr.ExpressionType

Enclosing class:

CalculatorExpr

protected static interface CalculatorExpr.ExpressionType

Common interface to check and maybe change the type of expression. All instances of Expression type implements this interface to check and maybe change the arguments adequate to the given or higher type.

Method Summary

Modifier and Type	Method and Description
CalculatorExpr.ExpressionType	checkArgument(CalculatorExpr.Value accu, CalculatorExpr.Value val2) Checks the second argument whether it is matching to the current expression type which matches to the accu.
char	typeChar()

Method Detail

typeChar

char typeChar()

checkArgument

CalculatorExpr.ExpressionType checkArgument(CalculatorExpr.Value accu,
                                            CalculatorExpr.Value val2)
                                     throws java.lang.Exception

Checks the second argument whether it is matching to the current expression type which matches to the accu. If the val2 provides another type, either it is converted to the current expression type or another (higher) expression type is taken and the accumulator value is converted.

Parameters:

accu - The accumulator maybe changed..

val2 - the second operand is tested, may be changed.

Returns:

type of the expression. Often it is this, sometimes it is an higher type.

Throws:

java.lang.Exception