print_r() — internals

print_r() — internals

Where it lives

• Signature: src/builtins/io/print_r.rs
• Lowering: src/codegen/lower_inst/builtins/debug.rs:34 (lower_print_r)
• Function symbol: lower_print_r()

Lowering notes

• Lowers print_r(value, $return = false) for concrete scalar/resource values
• and array/hash shells.
• Dispatch follows the call’s static result type, which the checker
• (src/builtins/io/print_r.rs) and the EIR return-type override
• (print_r_builtin_return_type_for_args) derive from the $return flag:
• • Str (literal true): render into the capture buffer and return the owned
• string finalized by __rt_pr_finish.
• • Bool (flag absent or literal false): render to stdout and return true.
• • Mixed (runtime flag): select the mode at runtime; see
• lower_print_r_runtime_flag.

Runtime helpers

The following runtime helpers are referenced:

• __rt_pr_finish

Signature summary

function print_r(mixed $value, bool $return = false): mixed

What the type checker enforces

• Arity: takes 1–2 arguments (1 optional).

Eval interpreter (magician)

• Declaration: crates/elephc-magician/src/interpreter/builtins/core/print_r.rs (eval_builtin!)
• Dispatch hooks: direct, values

Cross-references

• User reference for print_r()