Constant.h

Note

The documentation on this page was automatically extracted from the DOLFIN C++ code and may need to be edited or expanded.

class Constant

Parent class(es)

• Expression

This class represents a constant-valued expression.

explicit Constant(double value)

Create scalar constant

Arguments

value (double)

The scalar to create a Constant object from.

Example

Constant c(1.0);

Constant(double value0, double value1)

Create vector constant (dim = 2)

Arguments

value0 (double)

The first vector element.

value1 (double)

The second vector element.

Example

Constant B(0.0, 1.0);

Constant(double value0, double value1, double value2)

Create vector constant (dim = 3)

Arguments

value0 (double)

The first vector element.

value1 (double)

The second vector element.

value2 (double)

The third vector element.

Example

Constant T(0.0, 1.0, 0.0);

explicit Constant(std::vector<double> values)

Create vector-valued constant

Arguments

values (std::vector<double>)

Values to create a vector-valued constant from.

Constant(std::vector<std::size_t> value_shape, std::vector<double> values)

Create tensor-valued constant for flattened array of values

Arguments

value_shape (std::vector<std::size_t>)

Shape of tensor.

values (std::vector<double>)

Values to create tensor-valued constant from.

Constant(const Constant& constant)

Copy constructor

Arguments

constant (Constant)

Object to be copied.

const Constant& operator=(const Constant& constant)

Assignment operator

Arguments

constant (Constant)

Another constant.

const Constant& operator=(double constant)

Assignment operator

Arguments

constant (double)

Another constant.

operator double() const

Cast to double (for scalar constants)

Returns

double

The scalar value.