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Diffstat (limited to 'AGENTS/PITFALLS/classes.md')
| -rw-r--r-- | AGENTS/PITFALLS/classes.md | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/AGENTS/PITFALLS/classes.md b/AGENTS/PITFALLS/classes.md index 82415d7..ff61439 100644 --- a/AGENTS/PITFALLS/classes.md +++ b/AGENTS/PITFALLS/classes.md @@ -20,8 +20,10 @@ Part of the [pitfalls index](../PITFALLS.md). ## Construction - PROCEDURE NEW is an ordinary case-insensitive member, also called automatically - after zero initialization by DECLARE and assignment-only keyword NEW. Fields and - array elements recursively require parameterless construction before the outer NEW. + after zero initialization by assignment-only keyword NEW and by DECLARE with + parentheses. A plain DECLARE (and fields and array elements, constructed before the + outer NEW) calls NEW only when a parameterless NEW exists (`emitDefaultConstruct`); + otherwise the zeroed object waits for `x <- NEW C(...)` (guide 10.2). - Class variables and BYVAL class parameters use reference slots: keyword NEW rebinds them, while ordinary assignment copies into their current object. - Fields, array elements, BYREF, this and pointer dereferences receive a value copy |