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isset() — internals
Compiler internals for isset(): lowering path, type checks, and runtime helpers.
isset() — internals
Where it lives
- Signature:
crates/elephc-builtin-contract/src/catalog_surfaces.rs - Lowering:
src/codegen/lower_inst/builtins/isset.rs:24 (lower_isset) - Function symbol:
lower_isset()
Lowering notes
- Lowers
isset()for values already evaluated by the EIR frontend.
Semantic descriptor
Shared contract with a dedicated compiler language-construct implementation.
EIR and runtime boundary
Lowered by a dedicated compiler language-construct path.
Signature summary
function isset(mixed $var, ...$vars): boolWhat the type checker enforces
- Arity: takes exactly 1 argument.
- Variadic: collects excess arguments into
$vars.
Eval interpreter (magician)
- Declaration:
crates/elephc-magician/src/interpreter/builtins/symbols/isset.rs(eval_builtin!) - Execution: Magician interpreter adapter.
- Adapter reason:
dynamic-language-surface. - Dispatch hooks:
direct,values - Variadic: collects excess arguments into
$vars.