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Enable functions to use global imports.

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This commit is contained in:
Stephen Chung 2020-11-06 19:17:07 +08:00
parent 07a8a43298
commit 6bc5ba6668
9 changed files with 76 additions and 92 deletions
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2
Cargo.toml
View File

@ -6,7 +6,7 @@ members = [
[package] [package]
name = "rhai" name = "rhai"
version = "0.19.4" version = "0.19.5"
edition = "2018" edition = "2018"
authors = ["Jonathan Turner", "Lukáš Hozda", "Stephen Chung", "jhwgh1968"] authors = ["Jonathan Turner", "Lukáš Hozda", "Stephen Chung", "jhwgh1968"]
description = "Embedded scripting for Rust" description = "Embedded scripting for Rust"

8
RELEASES.md
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@ -1,6 +1,14 @@
Rhai Release Notes Rhai Release Notes
================== ==================
Version 0.19.5
==============
Breaking changes
----------------
* Modules imported at global level can now be accessed in functions.
Version 0.19.4 Version 0.19.4
============== ==============

2
doc/src/context.json
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@ -1,5 +1,5 @@
{ {
"version": "0.19.4", "version": "0.19.5",
"repoHome": "https://github.com/jonathandturner/rhai/blob/master", "repoHome": "https://github.com/jonathandturner/rhai/blob/master",
"repoTree": "https://github.com/jonathandturner/rhai/tree/master", "repoTree": "https://github.com/jonathandturner/rhai/tree/master",
"rootUrl": "", "rootUrl": "",

3
doc/src/language/fn-namespaces.md
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@ -82,8 +82,9 @@ fn get_message() { "Hello!" }
| script.rhai | | script.rhai |
--------------- ---------------
import "message" as msg;
fn say_hello() { fn say_hello() {
import "message" as msg;
print(msg::get_message()); print(msg::get_message());
} }
say_hello(); say_hello();

1
doc/src/language/fn-ptr.md
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@ -77,7 +77,6 @@ f::do_work(); // works!
let p = Fn("f::do_work"); // error: invalid function name let p = Fn("f::do_work"); // error: invalid function name
fn do_work_now() { // call it from a local function fn do_work_now() { // call it from a local function
import "foo" as f;
f::do_work(); f::do_work();
} }

125
src/engine.rs
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@ -88,10 +88,6 @@ impl Imports {
pub fn get(&self, index: usize) -> Option<&Module> { pub fn get(&self, index: usize) -> Option<&Module> {
self.0.get(index) self.0.get(index)
} }
/// Get a mutable reference to the imported module at a particular index.
pub fn get_mut(&mut self, index: usize) -> Option<&mut Module> {
self.0.get_mut(index)
}
/// Get the index of an imported module by name. /// Get the index of an imported module by name.
pub fn find(&self, name: &str) -> Option<usize> { pub fn find(&self, name: &str) -> Option<usize> {
self.1 self.1
@ -658,35 +654,6 @@ pub fn search_imports<'s>(
}) })
} }
/// Search for a module within an imports stack.
/// Position in `EvalAltResult` is `None` and must be set afterwards.
pub fn search_imports_mut<'s>(
mods: &'s mut Imports,
state: &mut State,
modules: &ModuleRef,
) -> Result<&'s mut Module, Box<EvalAltResult>> {
let Ident { name: root, pos } = &modules[0];
// Qualified - check if the root module is directly indexed
let index = if state.always_search {
0
} else {
modules.index().map_or(0, NonZeroUsize::get)
};
Ok(if index > 0 {
let offset = mods.len() - index;
mods.get_mut(offset).expect("invalid index in Imports")
} else {
if let Some(n) = mods.find(root) {
mods.get_mut(n)
} else {
None
}
.ok_or_else(|| EvalAltResult::ErrorModuleNotFound(root.to_string(), *pos))?
})
}
impl Engine { impl Engine {
/// Create a new `Engine` /// Create a new `Engine`
#[inline(always)] #[inline(always)]
@ -803,7 +770,7 @@ impl Engine {
pub(crate) fn search_namespace<'s, 'a>( pub(crate) fn search_namespace<'s, 'a>(
&self, &self,
scope: &'s mut Scope, scope: &'s mut Scope,
mods: &'s mut Imports, mods: &mut Imports,
state: &mut State, state: &mut State,
lib: &[&Module], lib: &[&Module],
this_ptr: &'s mut Option<&mut Dynamic>, this_ptr: &'s mut Option<&mut Dynamic>,
@ -813,8 +780,8 @@ impl Engine {
Expr::Variable(v) => match v.as_ref() { Expr::Variable(v) => match v.as_ref() {
// Qualified variable // Qualified variable
(_, Some(modules), hash_var, Ident { name, pos }) => { (_, Some(modules), hash_var, Ident { name, pos }) => {
let module = search_imports_mut(mods, state, modules)?; let module = search_imports(mods, state, modules)?;
let target = module.get_qualified_var_mut(*hash_var).map_err(|mut err| { let target = module.get_qualified_var(*hash_var).map_err(|mut err| {
match *err { match *err {
EvalAltResult::ErrorVariableNotFound(ref mut err_name, _) => { EvalAltResult::ErrorVariableNotFound(ref mut err_name, _) => {
*err_name = format!("{}{}", modules, name); *err_name = format!("{}{}", modules, name);
@ -825,7 +792,7 @@ impl Engine {
})?; })?;
// Module variables are constant // Module variables are constant
Ok((target.into(), name, ScopeEntryType::Constant, *pos)) Ok((target.clone().into(), name, ScopeEntryType::Constant, *pos))
} }
// Normal variable access // Normal variable access
_ => self.search_scope_only(scope, mods, state, lib, this_ptr, expr), _ => self.search_scope_only(scope, mods, state, lib, this_ptr, expr),
@ -909,6 +876,7 @@ impl Engine {
#[cfg(any(not(feature = "no_index"), not(feature = "no_object")))] #[cfg(any(not(feature = "no_index"), not(feature = "no_object")))]
fn eval_dot_index_chain_helper( fn eval_dot_index_chain_helper(
&self, &self,
mods: &mut Imports,
state: &mut State, state: &mut State,
lib: &[&Module], lib: &[&Module],
this_ptr: &mut Option<&mut Dynamic>, this_ptr: &mut Option<&mut Dynamic>,
@ -945,12 +913,12 @@ impl Engine {
let idx_pos = x.lhs.position(); let idx_pos = x.lhs.position();
let idx_val = idx_val.as_value(); let idx_val = idx_val.as_value();
let obj_ptr = &mut self.get_indexed_mut( let obj_ptr = &mut self.get_indexed_mut(
state, lib, target, idx_val, idx_pos, false, true, level, mods, state, lib, target, idx_val, idx_pos, false, true, level,
)?; )?;
self.eval_dot_index_chain_helper( self.eval_dot_index_chain_helper(
state, lib, this_ptr, obj_ptr, &x.rhs, idx_values, next_chain, level, mods, state, lib, this_ptr, obj_ptr, &x.rhs, idx_values, next_chain,
new_val, level, new_val,
) )
.map_err(|err| err.fill_position(*x_pos)) .map_err(|err| err.fill_position(*x_pos))
} }
@ -960,9 +928,9 @@ impl Engine {
let mut idx_val2 = idx_val.clone(); let mut idx_val2 = idx_val.clone();
// `call_setter` is introduced to bypass double mutable borrowing of target // `call_setter` is introduced to bypass double mutable borrowing of target
let _call_setter = match self let _call_setter = match self.get_indexed_mut(
.get_indexed_mut(state, lib, target, idx_val, pos, true, false, level) mods, state, lib, target, idx_val, pos, true, false, level,
{ ) {
// Indexed value is a reference - update directly // Indexed value is a reference - update directly
Ok(ref mut obj_ptr) => { Ok(ref mut obj_ptr) => {
obj_ptr.set_value(new_val.unwrap())?; obj_ptr.set_value(new_val.unwrap())?;
@ -984,8 +952,8 @@ impl Engine {
let args = &mut [val, &mut idx_val2, &mut new_val.0]; let args = &mut [val, &mut idx_val2, &mut new_val.0];
self.exec_fn_call( self.exec_fn_call(
state, lib, FN_IDX_SET, 0, args, is_ref, true, false, None, None, mods, state, lib, FN_IDX_SET, 0, args, is_ref, true, false, None,
level, None, level,
) )
.map_err(|err| match *err { .map_err(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _) EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
@ -1005,8 +973,10 @@ impl Engine {
// xxx[rhs] // xxx[rhs]
_ => { _ => {
let idx_val = idx_val.as_value(); let idx_val = idx_val.as_value();
self.get_indexed_mut(state, lib, target, idx_val, pos, false, true, level) self.get_indexed_mut(
.map(|v| (v.take_or_clone(), false)) mods, state, lib, target, idx_val, pos, false, true, level,
)
.map(|v| (v.take_or_clone(), false))
} }
} }
} }
@ -1026,7 +996,8 @@ impl Engine {
let def_value = def_value.map(Into::<Dynamic>::into); let def_value = def_value.map(Into::<Dynamic>::into);
let args = idx_val.as_fn_call_args(); let args = idx_val.as_fn_call_args();
self.make_method_call( self.make_method_call(
state, lib, name, *hash, target, args, def_value, *native, false, level, mods, state, lib, name, *hash, target, args, def_value, *native, false,
level,
) )
.map_err(|err| err.fill_position(*pos)) .map_err(|err| err.fill_position(*pos))
} }
@ -1036,8 +1007,9 @@ impl Engine {
Expr::Property(x) if target.is::<Map>() && new_val.is_some() => { Expr::Property(x) if target.is::<Map>() && new_val.is_some() => {
let IdentX { name, pos } = &x.1; let IdentX { name, pos } = &x.1;
let index = name.clone().into(); let index = name.clone().into();
let mut val = self let mut val = self.get_indexed_mut(
.get_indexed_mut(state, lib, target, index, *pos, true, false, level)?; mods, state, lib, target, index, *pos, true, false, level,
)?;
val.set_value(new_val.unwrap())?; val.set_value(new_val.unwrap())?;
Ok((Default::default(), true)) Ok((Default::default(), true))
@ -1047,7 +1019,7 @@ impl Engine {
let IdentX { name, pos } = &x.1; let IdentX { name, pos } = &x.1;
let index = name.clone().into(); let index = name.clone().into();
let val = self.get_indexed_mut( let val = self.get_indexed_mut(
state, lib, target, index, *pos, false, false, level, mods, state, lib, target, index, *pos, false, false, level,
)?; )?;
Ok((val.take_or_clone(), false)) Ok((val.take_or_clone(), false))
@ -1058,8 +1030,8 @@ impl Engine {
let mut new_val = new_val; let mut new_val = new_val;
let mut args = [target.as_mut(), &mut new_val.as_mut().unwrap().0]; let mut args = [target.as_mut(), &mut new_val.as_mut().unwrap().0];
self.exec_fn_call( self.exec_fn_call(
state, lib, setter, 0, &mut args, is_ref, true, false, None, None, mods, state, lib, setter, 0, &mut args, is_ref, true, false, None,
level, None, level,
) )
.map(|(v, _)| (v, true)) .map(|(v, _)| (v, true))
.map_err(|err| err.fill_position(*pos)) .map_err(|err| err.fill_position(*pos))
@ -1069,8 +1041,8 @@ impl Engine {
let ((getter, _), IdentX { pos, .. }) = x.as_ref(); let ((getter, _), IdentX { pos, .. }) = x.as_ref();
let mut args = [target.as_mut()]; let mut args = [target.as_mut()];
self.exec_fn_call( self.exec_fn_call(
state, lib, getter, 0, &mut args, is_ref, true, false, None, None, mods, state, lib, getter, 0, &mut args, is_ref, true, false, None,
level, None, level,
) )
.map(|(v, _)| (v, false)) .map(|(v, _)| (v, false))
.map_err(|err| err.fill_position(*pos)) .map_err(|err| err.fill_position(*pos))
@ -1082,7 +1054,7 @@ impl Engine {
let IdentX { name, pos } = &p.1; let IdentX { name, pos } = &p.1;
let index = name.clone().into(); let index = name.clone().into();
self.get_indexed_mut( self.get_indexed_mut(
state, lib, target, index, *pos, false, true, level, mods, state, lib, target, index, *pos, false, true, level,
)? )?
} }
// {xxx:map}.fn_name(arg_expr_list)[expr] | {xxx:map}.fn_name(arg_expr_list).expr // {xxx:map}.fn_name(arg_expr_list)[expr] | {xxx:map}.fn_name(arg_expr_list).expr
@ -1098,8 +1070,8 @@ impl Engine {
let args = idx_val.as_fn_call_args(); let args = idx_val.as_fn_call_args();
let (val, _) = self let (val, _) = self
.make_method_call( .make_method_call(
state, lib, name, *hash, target, args, def_value, *native, mods, state, lib, name, *hash, target, args, def_value,
false, level, *native, false, level,
) )
.map_err(|err| err.fill_position(*pos))?; .map_err(|err| err.fill_position(*pos))?;
val.into() val.into()
@ -1111,8 +1083,8 @@ impl Engine {
}; };
self.eval_dot_index_chain_helper( self.eval_dot_index_chain_helper(
state, lib, this_ptr, &mut val, &x.rhs, idx_values, next_chain, level, mods, state, lib, this_ptr, &mut val, &x.rhs, idx_values, next_chain,
new_val, level, new_val,
) )
.map_err(|err| err.fill_position(*x_pos)) .map_err(|err| err.fill_position(*x_pos))
} }
@ -1126,8 +1098,8 @@ impl Engine {
let args = &mut arg_values[..1]; let args = &mut arg_values[..1];
let (mut val, updated) = self let (mut val, updated) = self
.exec_fn_call( .exec_fn_call(
state, lib, getter, 0, args, is_ref, true, false, None, mods, state, lib, getter, 0, args, is_ref, true, false,
None, level, None, None, level,
) )
.map_err(|err| err.fill_position(*pos))?; .map_err(|err| err.fill_position(*pos))?;
@ -1135,6 +1107,7 @@ impl Engine {
let (result, may_be_changed) = self let (result, may_be_changed) = self
.eval_dot_index_chain_helper( .eval_dot_index_chain_helper(
mods,
state, state,
lib, lib,
this_ptr, this_ptr,
@ -1152,8 +1125,8 @@ impl Engine {
// Re-use args because the first &mut parameter will not be consumed // Re-use args because the first &mut parameter will not be consumed
arg_values[1] = val; arg_values[1] = val;
self.exec_fn_call( self.exec_fn_call(
state, lib, setter, 0, arg_values, is_ref, true, false, mods, state, lib, setter, 0, arg_values, is_ref, true,
None, None, level, false, None, None, level,
) )
.or_else( .or_else(
|err| match *err { |err| match *err {
@ -1181,16 +1154,16 @@ impl Engine {
let args = idx_val.as_fn_call_args(); let args = idx_val.as_fn_call_args();
let (mut val, _) = self let (mut val, _) = self
.make_method_call( .make_method_call(
state, lib, name, *hash, target, args, def_value, *native, mods, state, lib, name, *hash, target, args, def_value,
false, level, *native, false, level,
) )
.map_err(|err| err.fill_position(*pos))?; .map_err(|err| err.fill_position(*pos))?;
let val = &mut val; let val = &mut val;
let target = &mut val.into(); let target = &mut val.into();
self.eval_dot_index_chain_helper( self.eval_dot_index_chain_helper(
state, lib, this_ptr, target, &x.rhs, idx_values, next_chain, mods, state, lib, this_ptr, target, &x.rhs, idx_values,
level, new_val, next_chain, level, new_val,
) )
.map_err(|err| err.fill_position(*pos)) .map_err(|err| err.fill_position(*pos))
} }
@ -1275,7 +1248,8 @@ impl Engine {
let obj_ptr = &mut target.into(); let obj_ptr = &mut target.into();
self.eval_dot_index_chain_helper( self.eval_dot_index_chain_helper(
state, lib, &mut None, obj_ptr, dot_rhs, idx_values, chain_type, level, new_val, mods, state, lib, &mut None, obj_ptr, dot_rhs, idx_values, chain_type, level,
new_val,
) )
.map(|(v, _)| v) .map(|(v, _)| v)
.map_err(|err| err.fill_position(op_pos)) .map_err(|err| err.fill_position(op_pos))
@ -1287,7 +1261,8 @@ impl Engine {
let val = self.eval_expr(scope, mods, state, lib, this_ptr, expr, level)?; let val = self.eval_expr(scope, mods, state, lib, this_ptr, expr, level)?;
let obj_ptr = &mut val.into(); let obj_ptr = &mut val.into();
self.eval_dot_index_chain_helper( self.eval_dot_index_chain_helper(
state, lib, this_ptr, obj_ptr, dot_rhs, idx_values, chain_type, level, new_val, mods, state, lib, this_ptr, obj_ptr, dot_rhs, idx_values, chain_type, level,
new_val,
) )
.map(|(v, _)| v) .map(|(v, _)| v)
.map_err(|err| err.fill_position(op_pos)) .map_err(|err| err.fill_position(op_pos))
@ -1375,6 +1350,7 @@ impl Engine {
#[cfg(any(not(feature = "no_index"), not(feature = "no_object")))] #[cfg(any(not(feature = "no_index"), not(feature = "no_object")))]
fn get_indexed_mut<'a>( fn get_indexed_mut<'a>(
&self, &self,
_mods: &mut Imports,
state: &mut State, state: &mut State,
_lib: &[&Module], _lib: &[&Module],
target: &'a mut Target, target: &'a mut Target,
@ -1457,7 +1433,8 @@ impl Engine {
let mut idx = idx; let mut idx = idx;
let args = &mut [val, &mut idx]; let args = &mut [val, &mut idx];
self.exec_fn_call( self.exec_fn_call(
state, _lib, FN_IDX_GET, 0, args, is_ref, true, false, None, None, _level, _mods, state, _lib, FN_IDX_GET, 0, args, is_ref, true, false, None, None,
_level,
) )
.map(|(v, _)| v.into()) .map(|(v, _)| v.into())
.map_err(|err| match *err { .map_err(|err| match *err {
@ -1846,8 +1823,8 @@ impl Engine {
// Run function // Run function
let (value, _) = self let (value, _) = self
.exec_fn_call( .exec_fn_call(
state, lib, op, 0, args, false, false, false, None, None, mods, state, lib, op, 0, args, false, false, false, None,
level, None, level,
) )
.map_err(|err| err.fill_position(*op_pos))?; .map_err(|err| err.fill_position(*op_pos))?;
@ -1884,7 +1861,7 @@ impl Engine {
let result = self let result = self
.exec_fn_call( .exec_fn_call(
state, lib, op, 0, args, false, false, false, None, None, level, mods, state, lib, op, 0, args, false, false, false, None, None, level,
) )
.map(|(v, _)| v) .map(|(v, _)| v)
.map_err(|err| err.fill_position(*op_pos))?; .map_err(|err| err.fill_position(*op_pos))?;

17
src/fn_call.rs
View File

@ -469,6 +469,7 @@ impl Engine {
/// **DO NOT** reuse the argument values unless for the first `&mut` argument - all others are silently replaced by `()`! /// **DO NOT** reuse the argument values unless for the first `&mut` argument - all others are silently replaced by `()`!
pub(crate) fn exec_fn_call( pub(crate) fn exec_fn_call(
&self, &self,
mods: &mut Imports,
state: &mut State, state: &mut State,
lib: &[&Module], lib: &[&Module],
fn_name: &str, fn_name: &str,
@ -535,7 +536,6 @@ impl Engine {
let func = func.get_fn_def(); let func = func.get_fn_def();
let scope: &mut Scope = &mut Default::default(); let scope: &mut Scope = &mut Default::default();
let mods = &mut Default::default();
// Move captured variables into scope // Move captured variables into scope
#[cfg(not(feature = "no_closure"))] #[cfg(not(feature = "no_closure"))]
@ -684,6 +684,7 @@ impl Engine {
#[cfg(not(feature = "no_object"))] #[cfg(not(feature = "no_object"))]
pub(crate) fn make_method_call( pub(crate) fn make_method_call(
&self, &self,
mods: &mut Imports,
state: &mut State, state: &mut State,
lib: &[&Module], lib: &[&Module],
name: &str, name: &str,
@ -723,7 +724,7 @@ impl Engine {
// Map it to name(args) in function-call style // Map it to name(args) in function-call style
self.exec_fn_call( self.exec_fn_call(
state, lib, fn_name, hash, args, false, false, pub_only, None, def_val, level, mods, state, lib, fn_name, hash, args, false, false, pub_only, None, def_val, level,
) )
} else if _fn_name == KEYWORD_FN_PTR_CALL } else if _fn_name == KEYWORD_FN_PTR_CALL
&& call_args.len() > 0 && call_args.len() > 0
@ -750,7 +751,7 @@ impl Engine {
// Map it to name(args) in function-call style // Map it to name(args) in function-call style
self.exec_fn_call( self.exec_fn_call(
state, lib, fn_name, hash, args, is_ref, true, pub_only, None, def_val, level, mods, state, lib, fn_name, hash, args, is_ref, true, pub_only, None, def_val, level,
) )
} else if _fn_name == KEYWORD_FN_PTR_CURRY && obj.is::<FnPtr>() { } else if _fn_name == KEYWORD_FN_PTR_CURRY && obj.is::<FnPtr>() {
// Curry call // Curry call
@ -818,7 +819,8 @@ impl Engine {
let args = arg_values.as_mut(); let args = arg_values.as_mut();
self.exec_fn_call( self.exec_fn_call(
state, lib, _fn_name, hash, args, is_ref, true, pub_only, None, def_val, level, mods, state, lib, _fn_name, hash, args, is_ref, true, pub_only, None, def_val,
level,
) )
}?; }?;
@ -1064,7 +1066,7 @@ impl Engine {
let args = args.as_mut(); let args = args.as_mut();
self.exec_fn_call( self.exec_fn_call(
state, lib, name, hash, args, is_ref, false, pub_only, capture, def_val, level, mods, state, lib, name, hash, args, is_ref, false, pub_only, capture, def_val, level,
) )
.map(|(v, _)| v) .map(|(v, _)| v)
} }
@ -1176,12 +1178,11 @@ impl Engine {
} }
let args = args.as_mut(); let args = args.as_mut();
let fn_def = f.get_fn_def(); let fn_def = f.get_shared_fn_def().clone();
let new_scope = &mut Default::default(); let new_scope = &mut Default::default();
let mods = &mut Default::default();
self.call_script_fn(new_scope, mods, state, lib, &mut None, fn_def, args, level) self.call_script_fn(new_scope, mods, state, lib, &mut None, &fn_def, args, level)
} }
Some(f) if f.is_plugin_fn() => { Some(f) if f.is_plugin_fn() => {
f.get_plugin_fn().call((self, lib).into(), args.as_mut()) f.get_plugin_fn().call((self, lib).into(), args.as_mut())

1
src/fn_native.rs
View File

@ -183,6 +183,7 @@ impl FnPtr {
ctx.engine() ctx.engine()
.exec_fn_call( .exec_fn_call(
&mut Default::default(),
&mut Default::default(), &mut Default::default(),
ctx.lib, ctx.lib,
fn_name, fn_name,

9
src/module/mod.rs
View File

@ -268,20 +268,17 @@ impl Module {
self self
} }
/// Get a mutable reference to a modules-qualified variable. /// Get a reference to a modules-qualified variable.
/// Name and Position in `EvalAltResult` are None and must be set afterwards. /// Name and Position in `EvalAltResult` are None and must be set afterwards.
/// ///
/// The `u64` hash is calculated by the function `crate::calc_native_fn_hash`. /// The `u64` hash is calculated by the function `crate::calc_native_fn_hash`.
#[inline(always)] #[inline(always)]
pub(crate) fn get_qualified_var_mut( pub(crate) fn get_qualified_var(&self, hash_var: u64) -> Result<&Dynamic, Box<EvalAltResult>> {
&mut self,
hash_var: u64,
) -> Result<&mut Dynamic, Box<EvalAltResult>> {
if hash_var == 0 { if hash_var == 0 {
Err(EvalAltResult::ErrorVariableNotFound(String::new(), NO_POS).into()) Err(EvalAltResult::ErrorVariableNotFound(String::new(), NO_POS).into())
} else { } else {
self.all_variables self.all_variables
.get_mut(&hash_var) .get(&hash_var)
.ok_or_else(|| EvalAltResult::ErrorVariableNotFound(String::new(), NO_POS).into()) .ok_or_else(|| EvalAltResult::ErrorVariableNotFound(String::new(), NO_POS).into())
} }
} }