57 lines
1.7 KiB
Rust
57 lines
1.7 KiB
Rust
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mod command_enum;
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mod lua_wrapper;
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pub use command_enum::command_enum;
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pub use lua_wrapper::lua_wrapper;
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use syn::{ReturnType, Type, TypeBareFn};
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use crate::command_enum_parsing::FunctionDeclaration;
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pub fn get_bare_fn_input_type(function: &TypeBareFn) -> Option<Type> {
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if function.inputs.len() == 1 {
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Some(
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function
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.inputs
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.first()
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.expect("Only one element exists, we checked the length above")
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.ty
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.clone(),
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)
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} else if function.inputs.len() == 0 {
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// No inputs, so we can't return a type
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None
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} else {
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unreachable!(
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"The Function can only take one or zero arguments.
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Use a tuple `(arg1, arg2)` if you want more"
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);
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}
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}
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pub fn get_input_type_of_bare_fn_field(field: &FunctionDeclaration) -> Option<Type> {
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match &field.ty {
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syn::Type::BareFn(function) => get_bare_fn_input_type(&function),
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_ => unimplemented!(
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"Please specify the type as a bare fn type.
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That is: `fn(<args>) -> <outputs>`"
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),
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}
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}
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pub fn get_return_type_of_bare_fn_field(field: &FunctionDeclaration) -> Option<Type> {
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match &field.ty {
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syn::Type::BareFn(function) => get_bare_fn_return_type(&function),
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_ => unimplemented!(
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"Please specify the type as a bare fn type.
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That is: `fn(<args>) -> <outputs>`"
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),
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}
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}
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pub fn get_bare_fn_return_type(function: &TypeBareFn) -> Option<Type> {
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let return_path: &ReturnType = &function.output;
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match return_path {
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ReturnType::Default => None,
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ReturnType::Type(_, return_type) => Some(*return_type.to_owned()),
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}
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}
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