Node:Locations, Next:Declarations, Previous:Semantics, Up:Grammar File

Tracking Locations

Though grammar rules and semantic actions are enough to write a fully functional parser, it can be useful to process some additionnal informations, especially symbol locations.

The way locations are handled is defined by providing a data type, and actions to take when rules are matched.

• Location Type: Specifying a data type for locations.
• Actions and Locations: Using locations in actions.
• Location Default Action: Defining a general way to compute locations.