hello.c File Reference

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

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Functions
	if (!s) s
	push_value (vm, make_string(s))

Variables
case	OP_RUST_HELLO
	break

Detailed Description

Implements the OP_RUST_HELLO opcode (conditional build).

This opcode demonstrates calling into a Rust function from the VM. When FUN_WITH_RUST is enabled at build time, it retrieves a greeting string from Rust and pushes it as a VAL_STRING onto the VM stack. When Rust support is disabled, a runtime error is raised and Nil is pushed to keep stack consistency.

OP_RUST_HELLO: () -> string | Nil

Behavior (FUN_WITH_RUST=ON):

• Does not pop any values.
• Calls fun_rust_get_string() and pushes the returned C string as a VAL_STRING. If Rust returns NULL, an empty string is used instead.

Behavior (FUN_WITH_RUST=OFF):

• Raises a runtime error indicating missing Rust support.
• Pushes Nil to maintain stack discipline.

Definition in file hello.c.

Function Documentation

if()

if

(

!

s

)

Definition at line 40 of file make_array.c.

push_value()

push_value	(	vm	,
		make_string(s)	)

Variable Documentation

break

break

Definition at line 41 of file hello.c.

OP_RUST_HELLO

case OP_RUST_HELLO

Definition at line 32 of file hello.c.