# Module: Alf::Algebra::Classification

Defined in:
lib/alf/algebra/support/classification.rb

## Instance Method Summary collapse

• True if this operator is a binary operator, false otherwise.

• True if this is an experimental operator, false otherwise.

• True if this is a non relational operator, false otherwise.

• True if this operator is a zero-ary operator, false otherwise.

• True if this is a relational operator, false otherwise.

• True if this operator is an unary operator, false otherwise.

## Instance Method Details

### #binary? ⇒ Boolean

Returns true if this operator is a binary operator, false otherwise.

Returns:

• (Boolean)

true if this operator is a binary operator, false otherwise

 ``` 31 32 33``` ```# File 'lib/alf/algebra/support/classification.rb', line 31 def binary? arity == 2 end```

### #experimental? ⇒ Boolean

Returns true if this is an experimental operator, false otherwise.

Returns:

• (Boolean)

true if this is an experimental operator, false otherwise

 ``` 11 12 13``` ```# File 'lib/alf/algebra/support/classification.rb', line 11 def experimental? ancestors.include?(Experimental) end```

### #non_relational? ⇒ Boolean

Returns true if this is a non relational operator, false otherwise.

Returns:

• (Boolean)

true if this is a non relational operator, false otherwise

 ``` 16 17 18``` ```# File 'lib/alf/algebra/support/classification.rb', line 16 def non_relational? ancestors.include?(NonRelational) end```

### #nullary? ⇒ Boolean

Returns true if this operator is a zero-ary operator, false otherwise.

Returns:

• (Boolean)

true if this operator is a zero-ary operator, false otherwise

 ``` 21 22 23``` ```# File 'lib/alf/algebra/support/classification.rb', line 21 def nullary? arity == 0 end```

### #relational? ⇒ Boolean

Returns true if this is a relational operator, false otherwise.

Returns:

• (Boolean)

true if this is a relational operator, false otherwise

 ``` 6 7 8``` ```# File 'lib/alf/algebra/support/classification.rb', line 6 def relational? ancestors.include?(Relational) end```

### #unary? ⇒ Boolean

Returns true if this operator is an unary operator, false otherwise.

Returns:

• (Boolean)

true if this operator is an unary operator, false otherwise

 ``` 26 27 28``` ```# File 'lib/alf/algebra/support/classification.rb', line 26 def unary? arity == 1 end```