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shl

The left shift operator (« operator$shl) is overloaded for several object mostly to symbolize the forwarding of an information into an object.

Dataset

The left shift operator can be used to add values to a Dataset or a DatasetRef. Every left shift describes a new column in a row of the dataset.

dataset("test") << 1 << 2;
dataset("test") << 11 << 12;

this results in:

1	1	2
2	11	12

module A(float len, float fact);
protected void init ()
[
	Axiom ==> A(2,5) A(5,1) A(1,1);
]
 
public void run ()
{
 dataset("test") << (*a:A*).getId() << a[len] << a[fact] << a[len]*a[fact];
 
}