sprintf() — internals

sprintf() — internals

Where it lives

• Signature: src/builtins/string/sprintf.rs
• Lowering: src/codegen/lower_inst/builtins/strings.rs:573 (lower_sprintf)
• Function symbol: lower_sprintf()

Lowering notes

• Lowers sprintf(format, values...) by packing variadic records for __rt_sprintf.

Runtime helpers

The following runtime helpers are referenced:

• __rt_sprintf

Signature summary

function sprintf(string $format, ...$values): string

What the type checker enforces

• Arity: takes exactly 1 argument.
• Variadic: collects excess arguments into $values.

Eval interpreter (magician)

• Declaration: crates/elephc-magician/src/interpreter/builtins/formatting/sprintf.rs (eval_builtin!)
• Dispatch hooks: direct, values
• Variadic: collects excess arguments into $values.

Cross-references

• User reference for sprintf()