Struct inkwell::types::FunctionType

pub struct FunctionType<'ctx> { /* private fields */ }

A FunctionType is the type of a function variable.

Implementations

impl<'ctx> FunctionType<'ctx>

pub unsafe fn new(fn_type: LLVMTypeRef) -> Self

Create FunctionType from LLVMTypeRef

Safety

Undefined behavior, if referenced type isn’t function type

pub fn ptr_type(self, address_space: AddressSpace) -> PointerType<'ctx>

Creates a PointerType with this FunctionType for its element type.

Example

use inkwell::context::Context;
use inkwell::AddressSpace;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[], false);
let fn_ptr_type = fn_type.ptr_type(AddressSpace::default());

#[cfg(any(
    feature = "llvm4-0",
    feature = "llvm5-0",
    feature = "llvm6-0",
    feature = "llvm7-0",
    feature = "llvm8-0",
    feature = "llvm9-0",
    feature = "llvm10-0",
    feature = "llvm11-0",
    feature = "llvm12-0",
    feature = "llvm13-0",
    feature = "llvm14-0"
))]
assert_eq!(fn_ptr_type.get_element_type().into_function_type(), fn_type);

pub fn is_var_arg(self) -> bool

Determines whether or not a FunctionType is a variadic function.

Example

use inkwell::context::Context;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[], true);

assert!(fn_type.is_var_arg());

pub fn get_param_types(self) -> Vec<BasicTypeEnum<'ctx>>

Gets param types this FunctionType has.

Example

use inkwell::context::Context;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[f32_type.into()], true);
let param_types = fn_type.get_param_types();

assert_eq!(param_types.len(), 1);
assert_eq!(param_types[0].into_float_type(), f32_type);

pub fn count_param_types(self) -> u32

Counts the number of param types this FunctionType has.

Example

use inkwell::context::Context;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[f32_type.into()], true);

assert_eq!(fn_type.count_param_types(), 1);

pub fn is_sized(self) -> bool

Gets whether or not this FunctionType is sized or not. This is likely always false and may be removed in the future.

Example

use inkwell::context::Context;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[], true);

assert!(!fn_type.is_sized());

pub fn get_context(self) -> ContextRef<'ctx>

Gets a reference to the Context this FunctionType was created in.

Example

use inkwell::context::Context;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[], true);

assert_eq!(fn_type.get_context(), context);

pub fn print_to_string(self) -> LLVMString

Print the definition of a FunctionType to LLVMString.

pub fn get_return_type(self) -> Option<BasicTypeEnum<'ctx>>

Gets the return type of this FunctionType.

Example

use inkwell::context::Context;

let context = Context::create();
let f32_type = context.f32_type();
let fn_type = f32_type.fn_type(&[], true);

assert_eq!(fn_type.get_return_type().unwrap().into_float_type(), f32_type);

Trait Implementations

impl<'ctx> AnyType<'ctx> for FunctionType<'ctx>

fn as_any_type_enum(&self) -> AnyTypeEnum<'ctx>

Returns an AnyTypeEnum that represents the current type.

fn print_to_string(&self) -> LLVMString

Prints the definition of a Type to a LLVMString.

impl AsTypeRef for FunctionType<'_>

fn as_type_ref(&self) -> LLVMTypeRef

Returns the internal LLVM reference behind the type

impl<'ctx> Clone for FunctionType<'ctx>

fn clone(&self) -> FunctionType<'ctx>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FunctionType<'_>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for FunctionType<'_>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'ctx> From<FunctionType<'ctx>> for AnyTypeEnum<'ctx>

fn from(value: FunctionType<'_>) -> AnyTypeEnum<'_>

Converts to this type from the input type.

impl<'ctx> PartialEq for FunctionType<'ctx>

fn eq(&self, other: &FunctionType<'ctx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'ctx> TryFrom<AnyTypeEnum<'ctx>> for FunctionType<'ctx>

type Error = ()

The type returned in the event of a conversion error.

fn try_from(value: AnyTypeEnum<'ctx>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'ctx> Copy for FunctionType<'ctx>

impl<'ctx> Eq for FunctionType<'ctx>

impl<'ctx> StructuralPartialEq for FunctionType<'ctx>