loki.expression.operations

Sub-classes of Pymbolic’s native operations that allow us to inject Fortran-specific features, such as case-insensitive string comparison and bracket-aware and sub-expression grouping. Here we also add additional technical operations, such as cast and references.

Classes

Cast(name, expression[, kind])	Internal representation of a data type cast.
Comparison(left, operator, right)	Representation of a comparison operation.
Dereference(expression)	Internal representation of a Dereference.
LogicalAnd(children)	Representation of an 'and' in a logical expression.
LogicalNot(child)	Representation of a negation in a logical expression.
LogicalOr(children)	Representation of an 'or' in a logical expression.
ParenthesisedAdd(children)	Specialised version of Sum that always pretty-prints and code-generates with explicit parentheses.
ParenthesisedDiv(numerator[, denominator])	Specialised version of Quotient that always pretty-prints and code-generates with explicit parentheses.
ParenthesisedMul(children)	Specialised version of Product that always pretty-prints and code-generates with explicit parentheses.
ParenthesisedPow(base, exponent)	Specialised version of Power that always pretty-prints and code-generates with explicit parentheses.
Power(base, exponent)	Representation of a power.
Product(children)	Representation of a product.
Quotient(numerator[, denominator])	Representation of a quotient.
Reference(expression)	Internal representation of a Reference.
StringConcat(children)	Implements string concatenation in a way similar to Sum.
Sum(children)	Representation of a sum.

class Sum(children)

Bases: StrCompareMixin, Sum

Representation of a sum.

class Product(children)

Bases: StrCompareMixin, Product

Representation of a product.

class Quotient(numerator, denominator=1)

Bases: StrCompareMixin, Quotient

Representation of a quotient.

class Power(base, exponent)

Bases: StrCompareMixin, Power

Representation of a power.

class Comparison(left, operator, right)

Bases: StrCompareMixin, Comparison

Representation of a comparison operation.

class LogicalAnd(children)

Bases: StrCompareMixin, LogicalAnd

Representation of an ‘and’ in a logical expression.

class LogicalOr(children)

Bases: StrCompareMixin, LogicalOr

Representation of an ‘or’ in a logical expression.

class LogicalNot(child)

Bases: StrCompareMixin, LogicalNot

Representation of a negation in a logical expression.

class StringConcat(children)

Bases: _MultiChildExpression

Implements string concatenation in a way similar to Sum.

mapper_method = 'map_string_concat'

class Cast(name, expression, kind=None, **kwargs)

Bases: StrCompareMixin, Call

Internal representation of a data type cast.

init_arg_names = ('name', 'expression', 'kind')

mapper_method = 'map_cast'

property name

property expression

class Reference(expression)

Bases: StrCompareMixin, Expression

Internal representation of a Reference.

Warning

Experimental! Allowing compound Reference(Variable(...)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

C/C++ only, no corresponding concept in Fortran. Referencing refers to taking the address of an existing variable (to set a pointer variable).

init_arg_names = ('expression',)

property name

Allowing the compound Reference(Variable(name)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

property type

Allowing the compound Reference(Variable(type)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

property scope

Allowing the compound Reference(Variable(scope)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

property initial

Allowing the compound Reference(Variable(initial)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

mapper_method = 'map_c_reference'

class Dereference(expression)

Bases: StrCompareMixin, Expression

Internal representation of a Dereference.

Warning

Experimental! Allowing compound Dereference(Variable(...)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

C/C++ only, no corresponding concept in Fortran. Dereferencing (a pointer) refers to retrieving the value from a memory address (that is pointed by the pointer).

init_arg_names = ('expression',)

property name

Allowing the compound Dereference(Variable(name)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

property type

Allowing the compound Dereference(Variable(type)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

property scope

Allowing the compound Dereference(Variable(scope)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

property initial

Allowing the compound Dereference(Variable(initial)) to appear with behaviour akin to a symbol itself for easier processing in mappers.

mapper_method = 'map_c_dereference'