parser: accept generalized types and expressions in sizeof

[chqrlie]

Use case of identifier to resolve ambiguity at parse time for sizeof(a[x]):

• accept sizeof(Name[10]) as size of array of 10 objects of type Name
• and sizeof(name[10]) as size of array element name[10]
• if Name is a global constant array, this will generate an error as Name is not a type, but this case is unlikely to occur in regular code.

fixes #210

[bvdberg]

Based on the latest master, the unit test are broken:

test/parser/sizeof_expr_ok.c2:64: unexpected error: unknown module: 's' test/parser/sizeof_expr_ok.c2:69: unexpected error: 'aa[0]' is not a type

[chqrlie]

Based on the latest master, the unit test are broken:

test/parser/sizeof_expr_ok.c2:64: unexpected error: unknown module: 's' test/parser/sizeof_expr_ok.c2:69: unexpected error: 'aa[0]' is not a type

Are you sure? I build with no errors on my system but the test file does produce errors with the current master, as expected.

[bvdberg]

yes i tried everything again. Still the same errors... I'll try on my mac later today

[chqrlie]

Indeed different behavior on linux and macOS. The CI test fails but is not reported as failure either:

Run . env.sh
setting C2 development environment
test/parser/sizeof_expr_ok.c2 
test/parser/sizeof_expr_ok.c2:[6](https://github.com/c2lang/c2compiler/actions/runs/15007841090/job/42170721587?pr=218#step:4:7)4: unexpected error: unknown module: 's'
test/parser/sizeof_expr_ok.c2:69: unexpected error: 'aa[0]' is not a type
RESULTS: 1101 tests, 4 threads (10[8](https://github.com/c2lang/c2compiler/actions/runs/15007841090/job/42170721587?pr=218#step:4:9)6 ok, 1 failed, 14 skipped) ran in 1324 ms

Failed test summary:
test/parser/sizeof_expr_ok.c2

The tester exits with a zero status after reporting the test failures... This is a bug.

Ill try and investigate why the behavior differs on macOS.