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fgetc() — internals
Compiler internals for fgetc(): lowering path, type checks, and runtime helpers.
fgetc() — internals
Where it lives
- Signature:
src/builtins/io/fgetc.rs - Lowering:
src/builtins/semantics.rs:639 (lower_registry_call) - Function symbol:
lower_registry_call()
Lowering notes
- Uses the
runtime_callstrategy from the single-source builtin descriptor. - Emits the typed EIR target
runtime.fgetcthroughBuiltinLoweringContext. - The backend resolves that typed target through
src/codegen/lower_inst/runtime_calls.rs; PHP builtin names do not participate in dispatch.
Semantic descriptor
- Target strategy:
runtime_call - Validation:
checker_hook - Result type source:
checked - Result ownership:
may_alias_arguments - Effects:
static (16 declared effects) - Requirements:
static (0 requirements) - Callable policy:
static_only - Target support:
macos-aarch64,ios-arm64,ios-sim-arm64,linux-aarch64,linux-x86_64
EIR and runtime boundary
- Typed EIR target:
runtime.fgetc - Backend boundary:
src/codegen/lower_inst/runtime_calls.rsresolves the typed target without PHP-name dispatch.
Signature summary
function fgetc(resource $stream): mixed
What the type checker enforces
- Arity: takes exactly 1 argument.
Eval interpreter (magician)
- Declaration:
crates/elephc-magician/src/interpreter/builtins/filesystem/fgetc.rs(eval_builtin!) - Execution: Magician interpreter adapter.
- Adapter reason:
runtime-state-or-resource. - Dispatch hooks:
direct,values