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Bison 1.875

3.6.1 Data Type of Locations

Defining a data type for locations is much simpler than for semantic values, since all tokens and groupings always use the same type.

The type of locations is specified by defining a macro called YYLTYPE. When YYLTYPE is not defined, Bison uses a default structure type with four members:

typedef struct YYLTYPE { int first_line; int first_column; int last_line; int last_column; } YYLTYPE;