vprintf() — internals

vprintf() — internals

Where it lives

• Signature: src/builtins/string/vprintf.rs
• Lowering: src/codegen/lower_inst/builtins/strings.rs:592 (lower_vprintf)
• Function symbol: lower_vprintf()

Lowering notes

• Lowers vprintf(format, values) as vsprintf() followed by stdout emission.

Runtime helpers

The following runtime helpers are referenced:

• __rt_sprintf

Signature summary

function vprintf(string $format, array $values): int

What the type checker enforces

• Arity: takes exactly 2 arguments.

Eval interpreter (magician)

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

Cross-references

• User reference for vprintf()