When checking semantics of expressions, skip semantic checking of data type definitions
(not yet supported). If we don't skip, all subsequent POUs would not be checked.

.project

syntax: regexp
\.o$
syntax: regexp
^iec2c$
syntax: regexp
^iec2iec$
syntax: regexp
\.depend$
syntax: regexp
^stage1_2/iec\.(y|flex)\..*$