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Errors were reported using a throw like this:
throw({asn1_error,{get_line(hd(Tokens)),get(asn1_module),
[got,get_token(hd(Tokens)),expected,typereference]}}).
The attempt to tell the user what was expected was often mis-leading.
It is time-consuming and non-trival to provide correct information
of what is expected. Therefore, we will not even try. Instead we will
spend more effort to report the token where the error was discovered.
We will replace each throw with a function call:
parse_error(Tokens).
Also add the syntax_SUITE test suite to test error reporting and to
cover all error reporting code. Remove the old c_syntax/1 test case.
Also remove all out-commented code.
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The parser handled the builtin ABSTRACT-SYNTAX and TYPE-IDENTIFIER
classes specially, which caused problems. It turns out that there
is no longer any need to handle those classes specially.
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Besides simplifying the code and doing better error checking
and error reporting, fix the following bugs:
Support retrieving an OBJECT IDENTIFIER/RELATIVE-OID from an
object. Example:
oid OBJECT IDENTIFIER ::= some-object.&some-field
Allow an integer constant first in an OBJECT IDENTIFIER:
integer INTEGER ::= 0
oid OBJECT IDENTIFIER ::= {integer 1}
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Object sets with extension mark and without optional fields was not
generated properly. It needs the default [enc|dec]_xxx function clause
for the open type but no other clauses.
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Rewrite the confusing and buggy matching of an object definition
against the simplified syntax.
While we are at it, we will also add proper error handling.
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The following type of code would crash the compiler:
OSET SOME-CLASS ::= {OSET1, ..., OSET2}
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Also extend the test suite with more tests of inlined constructs
in object sets.
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Simplify the backends by letting asn1ct_check replacing a
with the actual type.
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The only code that is really different between the PER
and UPER backends is encoding of primitive types.
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The wrong backend was used.
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added.
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