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Symbols may have several string representations, for instance if they have an alias. What I call its "id" is a string that can be used as an identifier. May not exist. Currently the symbols which have the "tag_is_id" flag set are those that don't have an alias. Look harder for the id. * src/output.c (is_identifier): Move to... * src/symtab.c (is_identifier): here. * src/symtab.h, src/symtab.c (symbol_id_get): New. * src/output.c (symbol_definitions_output): Use it to define "id" and "has_id". Remove the definition of "tag_is_id". * data/lalr1.cc: Use the "id" and "has_id" whereever "tag" and "tag_is_id" were used to produce code. We still use "tag" for documentation.
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