substr_replace() — internals

substr_replace() — internals

Where it lives

• Signature: src/builtins/string/substr_replace.rs
• Lowering: src/codegen/lower_inst/builtins/strings.rs:792 (lower_substr_replace)
• Function symbol: lower_substr_replace()

Lowering notes

• Lowers substr_replace(string, replacement, start, length?).

Runtime helpers

The following runtime helpers are referenced:

• __rt_str_repeat
• __rt_substr_replace

Signature summary

function substr_replace(string $string, string $replace, int $offset, int $length = null): string

What the type checker enforces

• Arity: takes 3–4 arguments (1 optional).

Eval interpreter (magician)

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

Cross-references

• User reference for substr_replace()