str_starts_with() — internals

str_starts_with() — internals

Where it lives

• Signature: src/builtins/string/str_starts_with.rs
• Lowering: src/codegen/lower_inst/builtins/strings.rs:156 (lower_binary_string_runtime)
• Function symbol: lower_binary_string_runtime()

Lowering notes

• Lowers a two-argument string builtin that directly delegates to a runtime helper.

Runtime helpers

The following runtime helpers are referenced:

• __rt_explode

Signature summary

function str_starts_with(string $haystack, string $needle): bool

What the type checker enforces

• Arity: takes exactly 2 arguments.

Eval interpreter (magician)

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

Cross-references

• User reference for str_starts_with()