kicad/pcbnew/dialogs/panel_setup_rules_help_8expression_functions.md

Expression functions

All function parameters support simple wildcards (* and ?).

A.enclosedByArea('<zone_name>')

True if all of A lies within the given zone's outline.

NB: this is potentially a more expensive call than intersectsArea(). Use intersectsArea() where possible.

A.existsOnLayer('<layer_name>')

True if A exists on the given layer. The layer name can be either the name assigned in Board Setup > Board Editor Layers or the canonical name (ie: F.Cu).

NB: this returns true if A is on the given layer, independently of whether or not the rule is being evaluated for that layer. For the latter use a (layer "layer_name") clause in the rule.

A.fromTo('x', 'y')

True if the object exists on the copper path between the given pads. x and y are the full names of pads in the design, such as R1-Pad1.

A.getField('<field_name>')

The value of the given field. Only footprints have fields, so a field is only returned if A is a footprint.

A.hasComponentClass('<component_class_name>')

True if the set of component classes assigned to A contains the named component class.

A.hasNetclass('<netclass_name>')

True if A has had the given netclass assigned to it, either by an explicit netclass label or through a pattern match assignment.

A.inDiffPair('<net_name>')

True if A has a net that is part of the specified differential pair. <net_name> is the base name of the differential pair. For example, inDiffPair('/CLK') matches items in the /CLK_P and /CLK_N nets.

A.intersectsArea('<zone_name>')

True if any part of A lies within the given zone's outline.

A.intersectsCourtyard('<footprint_identifier>')

True if any part of A lies within the given footprint's principal courtyard.

A.intersectsFrontCourtyard('<footprint_identifier>')

True if any part of A lies within the given footprint's front courtyard.

A.intersectsBackCourtyard('<footprint_identifier>')

True if any part of A lies within the given footprint's back courtyard.

The footprint_identifier listed above can be one of the following:

1. A reference designator, possibly containing wildcards * and ?
2. A footprint library identifier such as LibName:FootprintName. In this case, the library identifier must contain the : character to separate the library name from the footprint name, and either name may contain wildcards.
3. A component class, in the form ${Class:ClassName}. The keyword Class is not case-sensitive, but component class names are case-sensitive.

A.isBlindBuriedVia()

True if A is a blind/buried via.

AB.isCoupledDiffPair()

True if A and B are members of the same diff pair.

A.isMicroVia()

True if A is a microvia.

A.isPlated()

True if A has a hole which is plated.

A.memberOfGroup('<group_name>')

True if A is a member of the given group. The name can contain wildcards. Includes nested membership.

A.memberOfFootprint('<footprint_identifier>')

True if A is a member of a given footprint (for example, a pad or graphic shape defined inside that footprint). The various ways of specifying footprint_identifier are described above.

A.memberOfSheet('<sheet_path>')

True if A is a member of the given schematic sheet. The sheet path can contain wildcards.