StringLength (lisa-sdk 0.1b9 API)

java.lang.Object
- it.unive.lisa.symbolic.value.operator.unary.StringLength

All Implemented Interfaces:

Operator, StringOperator, UnaryOperator
```
public class StringLength
extends java.lang.Object
implements StringOperator, UnaryOperator
```
Given an expression that evaluates to a string value, a UnaryExpression using this operator computes an integral value, from 0 upwards, representing the length of that value.

Argument expression type: StringType
Computed expression type: NumericType (integral)

Field Summary

Fields
Modifier and Type Field Description

static StringLength INSTANCE
The singleton instance of this class.

Constructor Summary

Constructors
Modifier Constructor Description

protected StringLength()
Builds the operator.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`toString()`
`java.util.Set<Type>`	`typeInference(TypeSystem types, java.util.Set<Type> argument)`	Computes the runtime types of this expression (i.e., of the result of this expression) assuming that the argument of this expression has the given types.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - INSTANCE
```
public static final StringLength INSTANCE
```
    The singleton instance of this class.
- Constructor Detail
  - StringLength
```
protected StringLength()
```
    Builds the operator. This constructor is visible to allow subclassing: instances of this class should be unique, and the singleton can be retrieved through field INSTANCE.
- Method Detail
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - typeInference
```
public java.util.Set<Type> typeInference(TypeSystem types,
                                         java.util.Set<Type> argument)
```
    Description copied from interface: UnaryOperator
    
    Computes the runtime types of this expression (i.e., of the result of this expression) assuming that the argument of this expression has the given types.
    
    Specified by:
    
    typeInference in interface UnaryOperator
    
    Parameters:
    
    types - the type system knowing about the types of the current program
    
    argument - the set of types of the argument of this expression
    
    Returns:
    
    the runtime types of this expression