hello_args_return.c File Reference

Implements the OP_RUST_HELLO_ARGS_RETURN opcode (conditional build). More...

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Functions
	free_value (vmsg)
	if (msg)
	if (ret)

Variables
case	OP_RUST_HELLO_ARGS_RETURN
char *	msg = value_to_string_alloc(&vmsg)
	else
	break

Detailed Description

Implements the OP_RUST_HELLO_ARGS_RETURN opcode (conditional build).

Demonstrates round-tripping a string value through Rust. Pops a value, converts it to a C string, passes it to Rust, and pushes back the string returned by Rust. If Rust returns NULL or Rust support is disabled, Nil is pushed.

OP_RUST_HELLO_ARGS_RETURN: (msg:any) -> string | Nil

Behavior (FUN_WITH_RUST=ON):

• Pops one value from the stack and converts it to a newly allocated C string via value_to_string_alloc().
• Calls fun_rust_echo_string(msg) which returns an owned C string pointer that must be released via fun_rust_string_free().
• Pushes the returned string as VAL_STRING on success; pushes Nil if Rust returns NULL.

Behavior (FUN_WITH_RUST=OFF):

• Pops and frees one value to preserve stack discipline.
• Raises a runtime error indicating missing Rust support.
• Pushes Nil.

Definition in file hello_args_return.c.

Function Documentation

free_value()

free_value

(

vmsg

)

if() [1/2]

if

(

msg

)

Definition at line 40 of file hello_args_return.c.

if() [2/2]

if

(

ret

)

Definition at line 51 of file hello_args_return.c.

Variable Documentation

break

break

Definition at line 65 of file hello_args_return.c.

else

else

Initial value:

{
    char *ret = fun_rust_echo_string("")

Definition at line 49 of file hello_args_return.c.

msg

char* msg = value_to_string_alloc(&vmsg)

Definition at line 38 of file hello_args_return.c.

OP_RUST_HELLO_ARGS_RETURN

case OP_RUST_HELLO_ARGS_RETURN

Definition at line 35 of file hello_args_return.c.