Reserved Keyword
"next" is a reserved keyword for phasers. The frontend will throw an error whenever a local or a field is name next.
IN clause
- Pitfall: It is forbidden to pass addresses of locals on stack to an async IN clause
- Solutions:
- Use the OUT clause
- Pass a pointer to a data-structure allocated on the heap
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// Legal code: a single IN clause, that takes a list several arguments
async IN(a,b) OUT(x) { code }
// Invalid example => Compile time error (two IN clauses specified)
async IN(a) IN(b) OUT(x) { code }
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OUT clause
- Pitfall: OUT variables are guaranteed to have been written back only after the enclosing finish scope is finished
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