1749 lines
56 KiB
Rust
1749 lines
56 KiB
Rust
//! Module defining external-loaded modules for Rhai.
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use crate::ast::{FnAccess, Ident};
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use crate::dynamic::Variant;
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use crate::fn_call::FnCallArgs;
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use crate::fn_native::{shared_take_or_clone, CallableFunction, IteratorFn, SendSync};
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use crate::fn_register::RegisterNativeFunction;
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use crate::parse::IdentifierBuilder;
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use crate::token::Token;
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use crate::{
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calc_fn_params_hash, calc_qualified_fn_hash, combine_hashes, Dynamic, EvalAltResult,
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Identifier, ImmutableString, NativeCallContext, Position, Shared, StaticVec,
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};
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#[cfg(feature = "no_std")]
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use std::prelude::v1::*;
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use std::{
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any::TypeId,
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collections::{BTreeMap, BTreeSet},
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fmt,
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iter::{empty, once},
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num::NonZeroUsize,
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ops::{Add, AddAssign, Deref, DerefMut},
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};
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#[cfg(not(feature = "no_index"))]
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use crate::Array;
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#[cfg(not(feature = "no_object"))]
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use crate::Map;
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/// A type representing the namespace of a function.
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#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
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pub enum FnNamespace {
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/// Expose to global namespace.
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Global,
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/// Module namespace only.
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Internal,
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}
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impl Default for FnNamespace {
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#[inline(always)]
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fn default() -> Self {
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Self::Internal
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}
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}
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/// Data structure containing a single registered function.
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#[derive(Debug, Clone)]
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pub struct FuncInfo {
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/// Function instance.
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pub func: Shared<CallableFunction>,
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/// Function namespace.
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pub namespace: FnNamespace,
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/// Function access mode.
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pub access: FnAccess,
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/// Function name.
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pub name: Identifier,
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/// Number of parameters.
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pub params: usize,
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/// Parameter types (if applicable).
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pub param_types: StaticVec<TypeId>,
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/// Parameter names (if available).
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#[cfg(feature = "metadata")]
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pub param_names: StaticVec<Identifier>,
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}
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impl FuncInfo {
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/// Generate a signature of the function.
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/// Exported under the `metadata` feature only.
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#[cfg(feature = "metadata")]
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#[must_use]
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pub fn gen_signature(&self) -> String {
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let mut sig = format!("{}(", self.name);
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if !self.param_names.is_empty() {
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let mut params: StaticVec<String> =
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self.param_names.iter().map(|s| s.as_str().into()).collect();
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let return_type = params.pop().unwrap_or_else(|| "()".into());
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sig.push_str(¶ms.join(", "));
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if return_type != "()" {
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sig.push_str(") -> ");
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sig.push_str(&return_type);
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} else {
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sig.push(')');
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}
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} else {
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for x in 0..self.params {
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sig.push('_');
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if x < self.params - 1 {
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sig.push_str(", ");
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}
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}
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if self.func.is_script() {
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sig.push(')');
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} else {
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sig.push_str(") -> ?");
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}
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}
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sig
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}
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}
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/// _(internals)_ Calculate a [`u64`] hash key from a namespace-qualified function name and
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/// parameter types.
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/// Exported under the `internals` feature only.
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///
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/// Module names are passed in via `&str` references from an iterator.
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/// Parameter types are passed in via [`TypeId`] values from an iterator.
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///
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/// # Note
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///
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/// The first module name is skipped. Hashing starts from the _second_ module in the chain.
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#[inline]
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fn calc_native_fn_hash<'a>(
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modules: impl Iterator<Item = &'a str>,
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fn_name: &str,
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params: &[TypeId],
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) -> u64 {
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let hash_script = calc_qualified_fn_hash(modules, fn_name, params.len());
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let hash_params = calc_fn_params_hash(params.iter().cloned());
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combine_hashes(hash_script, hash_params)
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}
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/// A module which may contain variables, sub-modules, external Rust functions,
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/// and/or script-defined functions.
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#[derive(Clone)]
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pub struct Module {
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/// ID identifying the module.
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id: Option<Identifier>,
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/// Is this module internal?
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pub(crate) internal: bool,
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/// Sub-modules.
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modules: BTreeMap<Identifier, Shared<Module>>,
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/// [`Module`] variables.
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variables: BTreeMap<Identifier, Dynamic>,
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/// Flattened collection of all [`Module`] variables, including those in sub-modules.
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all_variables: BTreeMap<u64, Dynamic>,
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/// External Rust functions.
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functions: BTreeMap<u64, Box<FuncInfo>>,
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/// Flattened collection of all external Rust functions, native or scripted.
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/// including those in sub-modules.
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all_functions: BTreeMap<u64, Shared<CallableFunction>>,
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/// Iterator functions, keyed by the type producing the iterator.
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type_iterators: BTreeMap<TypeId, IteratorFn>,
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/// Flattened collection of iterator functions, including those in sub-modules.
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all_type_iterators: BTreeMap<TypeId, IteratorFn>,
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/// Is the [`Module`] indexed?
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indexed: bool,
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/// Does the [`Module`] contain indexed functions that have been exposed to the global namespace?
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contains_indexed_global_functions: bool,
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/// Interned strings
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identifiers: IdentifierBuilder,
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}
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impl Default for Module {
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#[inline(always)]
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fn default() -> Self {
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Self::new()
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}
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}
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impl fmt::Debug for Module {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let mut d = f.debug_struct("Module");
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self.id.as_ref().map(|id| d.field("id", id));
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if !self.modules.is_empty() {
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d.field(
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"modules",
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&self
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.modules
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.keys()
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.map(|m| m.as_str())
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.collect::<BTreeSet<_>>(),
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);
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}
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if !self.variables.is_empty() {
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d.field("vars", &self.variables);
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}
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if !self.functions.is_empty() {
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d.field(
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"functions",
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&self
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.functions
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.values()
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.map(|f| f.func.to_string())
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.collect::<BTreeSet<_>>(),
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);
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}
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d.finish()
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}
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}
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impl AsRef<Module> for Module {
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#[inline(always)]
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fn as_ref(&self) -> &Module {
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self
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}
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}
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impl<M: AsRef<Module>> Add<M> for &Module {
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type Output = Module;
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#[inline(always)]
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fn add(self, rhs: M) -> Self::Output {
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let mut module = self.clone();
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module.merge(rhs.as_ref());
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module
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}
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}
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impl<M: AsRef<Module>> Add<M> for Module {
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type Output = Self;
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#[inline(always)]
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fn add(mut self, rhs: M) -> Self::Output {
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self.merge(rhs.as_ref());
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self
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}
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}
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impl<M: Into<Module>> AddAssign<M> for Module {
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#[inline(always)]
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fn add_assign(&mut self, rhs: M) {
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self.combine(rhs.into());
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}
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}
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impl Module {
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/// Create a new [`Module`].
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_var("answer", 42_i64);
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/// assert_eq!(module.get_var_value::<i64>("answer").expect("answer should exist"), 42);
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/// ```
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#[inline(always)]
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#[must_use]
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pub fn new() -> Self {
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Self {
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id: None,
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internal: false,
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modules: Default::default(),
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variables: Default::default(),
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all_variables: Default::default(),
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functions: Default::default(),
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all_functions: Default::default(),
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type_iterators: Default::default(),
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all_type_iterators: Default::default(),
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indexed: true,
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contains_indexed_global_functions: false,
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identifiers: Default::default(),
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}
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}
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/// Get the ID of the [`Module`], if any.
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_id("hello");
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/// assert_eq!(module.id(), Some("hello"));
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/// ```
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#[inline(always)]
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#[must_use]
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pub fn id(&self) -> Option<&str> {
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self.id_raw().map(|s| s.as_str())
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}
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/// Get the ID of the [`Module`] as an [`Identifier`], if any.
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#[inline(always)]
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#[must_use]
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pub(crate) const fn id_raw(&self) -> Option<&Identifier> {
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self.id.as_ref()
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}
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/// Set the ID of the [`Module`].
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_id("hello");
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/// assert_eq!(module.id(), Some("hello"));
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/// ```
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#[inline(always)]
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pub fn set_id(&mut self, id: impl Into<Identifier>) -> &mut Self {
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self.id = Some(id.into());
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self
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}
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/// Clear the ID of the [`Module`].
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_id("hello");
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/// assert_eq!(module.id(), Some("hello"));
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/// module.clear_id();
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/// assert_eq!(module.id(), None);
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/// ```
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#[inline(always)]
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pub fn clear_id(&mut self) -> &mut Self {
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self.id = None;
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self
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}
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/// Is the [`Module`] empty?
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let module = Module::new();
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/// assert!(module.is_empty());
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/// ```
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#[inline]
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#[must_use]
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pub fn is_empty(&self) -> bool {
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self.functions.is_empty()
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&& self.all_functions.is_empty()
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&& self.variables.is_empty()
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&& self.all_variables.is_empty()
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&& self.modules.is_empty()
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&& self.type_iterators.is_empty()
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&& self.all_type_iterators.is_empty()
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}
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/// Is the [`Module`] indexed?
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///
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/// A module must be indexed before it can be used in an `import` statement.
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// assert!(module.is_indexed());
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///
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/// module.set_native_fn("foo", |x: &mut i64, y: i64| { *x = y; Ok(()) });
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/// assert!(!module.is_indexed());
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///
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/// # #[cfg(not(feature = "no_module"))]
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/// # {
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/// module.build_index();
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/// assert!(module.is_indexed());
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/// # }
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/// ```
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#[inline(always)]
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#[must_use]
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pub const fn is_indexed(&self) -> bool {
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self.indexed
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}
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/// Generate signatures for all the non-private functions in the [`Module`].
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/// Exported under the `metadata` feature only.
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#[cfg(feature = "metadata")]
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#[inline(always)]
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pub fn gen_fn_signatures(&self) -> impl Iterator<Item = String> + '_ {
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self.functions
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.values()
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.filter(|f| match f.access {
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FnAccess::Public => true,
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FnAccess::Private => false,
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})
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.map(|f| f.gen_signature())
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}
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/// Does a variable exist in the [`Module`]?
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_var("answer", 42_i64);
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/// assert!(module.contains_var("answer"));
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/// ```
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#[inline(always)]
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#[must_use]
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pub fn contains_var(&self, name: &str) -> bool {
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self.variables.contains_key(name)
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}
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/// Get the value of a [`Module`] variable.
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_var("answer", 42_i64);
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/// assert_eq!(module.get_var_value::<i64>("answer").expect("answer should exist"), 42);
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/// ```
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#[inline(always)]
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#[must_use]
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pub fn get_var_value<T: Variant + Clone>(&self, name: &str) -> Option<T> {
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self.get_var(name).and_then(Dynamic::try_cast::<T>)
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}
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/// Get a [`Module`] variable as a [`Dynamic`].
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_var("answer", 42_i64);
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/// assert_eq!(module.get_var("answer").expect("answer should exist").cast::<i64>(), 42);
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/// ```
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#[inline(always)]
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#[must_use]
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pub fn get_var(&self, name: &str) -> Option<Dynamic> {
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self.variables.get(name).cloned()
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}
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/// Set a variable into the [`Module`].
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///
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/// If there is an existing variable of the same name, it is replaced.
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///
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/// # Example
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///
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/// ```
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/// # use rhai::Module;
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/// let mut module = Module::new();
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/// module.set_var("answer", 42_i64);
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/// assert_eq!(module.get_var_value::<i64>("answer").expect("answer should exist"), 42);
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/// ```
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#[inline]
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pub fn set_var(
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&mut self,
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name: impl Into<Identifier>,
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value: impl Variant + Clone,
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) -> &mut Self {
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let ident = name.into();
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let value = Dynamic::from(value);
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if self.indexed {
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let hash_var = crate::calc_qualified_var_hash(once(""), &ident);
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self.all_variables.insert(hash_var, value.clone());
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}
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self.variables.insert(ident, value);
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self
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}
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|
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/// Get a reference to a namespace-qualified variable.
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/// Name and Position in [`EvalAltResult`] are [`None`] and [`NONE`][Position::NONE] and must be set afterwards.
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#[inline]
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pub(crate) fn get_qualified_var(&self, hash_var: u64) -> Result<&Dynamic, Box<EvalAltResult>> {
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self.all_variables.get(&hash_var).ok_or_else(|| {
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EvalAltResult::ErrorVariableNotFound(String::new(), Position::NONE).into()
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})
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}
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|
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/// Set a script-defined function into the [`Module`].
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///
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/// If there is an existing function of the same name and number of arguments, it is replaced.
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#[cfg(not(feature = "no_function"))]
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#[inline]
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pub fn set_script_fn(&mut self, fn_def: impl Into<Shared<crate::ast::ScriptFnDef>>) -> u64 {
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let fn_def = fn_def.into();
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// None + function name + number of arguments.
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let num_params = fn_def.params.len();
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let hash_script = crate::calc_fn_hash(&fn_def.name, num_params);
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let mut param_names = fn_def.params.clone();
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param_names.push("Dynamic".into());
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self.functions.insert(
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hash_script,
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FuncInfo {
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name: fn_def.name.clone(),
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namespace: FnNamespace::Internal,
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access: fn_def.access,
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params: num_params,
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param_types: Default::default(),
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|
#[cfg(feature = "metadata")]
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param_names,
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func: Into::<CallableFunction>::into(fn_def).into(),
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}
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.into(),
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);
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self.indexed = false;
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self.contains_indexed_global_functions = false;
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hash_script
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}
|
|
|
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/// Get a shared reference to the script-defined function in the [`Module`] based on name
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|
/// and number of parameters.
|
|
#[cfg(not(feature = "no_function"))]
|
|
#[inline]
|
|
#[must_use]
|
|
pub fn get_script_fn(
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&self,
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name: &str,
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num_params: usize,
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) -> Option<&Shared<crate::ast::ScriptFnDef>> {
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self.functions
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.values()
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.find(|f| f.params == num_params && f.name == name)
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.and_then(|f| f.func.get_script_fn_def())
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}
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|
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/// Get a mutable reference to the underlying [`BTreeMap`] of sub-modules.
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///
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|
/// # WARNING
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///
|
|
/// By taking a mutable reference, it is assumed that some sub-modules will be modified.
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|
/// Thus the [`Module`] is automatically set to be non-indexed.
|
|
#[cfg(not(feature = "no_module"))]
|
|
#[inline]
|
|
#[must_use]
|
|
pub(crate) fn sub_modules_mut(&mut self) -> &mut BTreeMap<Identifier, Shared<Module>> {
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// We must assume that the user has changed the sub-modules
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// (otherwise why take a mutable reference?)
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self.all_functions.clear();
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self.all_variables.clear();
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self.all_type_iterators.clear();
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self.indexed = false;
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self.contains_indexed_global_functions = false;
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|
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&mut self.modules
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}
|
|
|
|
/// Does a sub-module exist in the [`Module`]?
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # use rhai::Module;
|
|
/// let mut module = Module::new();
|
|
/// let sub_module = Module::new();
|
|
/// module.set_sub_module("question", sub_module);
|
|
/// assert!(module.contains_sub_module("question"));
|
|
/// ```
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn contains_sub_module(&self, name: &str) -> bool {
|
|
self.modules.contains_key(name)
|
|
}
|
|
|
|
/// Get a sub-module in the [`Module`].
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # use rhai::Module;
|
|
/// let mut module = Module::new();
|
|
/// let sub_module = Module::new();
|
|
/// module.set_sub_module("question", sub_module);
|
|
/// assert!(module.get_sub_module("question").is_some());
|
|
/// ```
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn get_sub_module(&self, name: &str) -> Option<&Module> {
|
|
self.modules.get(name).map(|m| m.as_ref())
|
|
}
|
|
|
|
/// Set a sub-module into the [`Module`].
|
|
///
|
|
/// If there is an existing sub-module of the same name, it is replaced.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # use rhai::Module;
|
|
/// let mut module = Module::new();
|
|
/// let sub_module = Module::new();
|
|
/// module.set_sub_module("question", sub_module);
|
|
/// assert!(module.get_sub_module("question").is_some());
|
|
/// ```
|
|
#[inline]
|
|
pub fn set_sub_module(
|
|
&mut self,
|
|
name: impl Into<Identifier>,
|
|
sub_module: impl Into<Shared<Module>>,
|
|
) -> &mut Self {
|
|
self.modules.insert(name.into(), sub_module.into());
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
self
|
|
}
|
|
|
|
/// Does the particular Rust function exist in the [`Module`]?
|
|
///
|
|
/// The [`u64`] hash is returned by the [`set_native_fn`][Module::set_native_fn] call.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # use rhai::Module;
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_native_fn("calc", || Ok(42_i64));
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn contains_fn(&self, hash_fn: u64) -> bool {
|
|
self.functions.contains_key(&hash_fn)
|
|
}
|
|
|
|
/// Update the metadata (parameter names/types and return type) of a registered function.
|
|
/// Exported under the `metadata` feature only.
|
|
///
|
|
/// The [`u64`] hash is returned by the [`set_native_fn`][Module::set_native_fn] call.
|
|
///
|
|
/// ## Parameter Names and Types
|
|
///
|
|
/// Each parameter name/type pair should be a single string of the format: `var_name: type`.
|
|
///
|
|
/// ## Return Type
|
|
///
|
|
/// The _last entry_ in the list should be the _return type_ of the function.
|
|
/// In other words, the number of entries should be one larger than the number of parameters.
|
|
#[cfg(feature = "metadata")]
|
|
#[inline]
|
|
pub fn update_fn_metadata(&mut self, hash_fn: u64, arg_names: &[&str]) -> &mut Self {
|
|
let param_names = arg_names
|
|
.iter()
|
|
.map(|&name| self.identifiers.get(name))
|
|
.collect();
|
|
|
|
if let Some(f) = self.functions.get_mut(&hash_fn) {
|
|
f.param_names = param_names;
|
|
}
|
|
|
|
self
|
|
}
|
|
|
|
/// Update the namespace of a registered function.
|
|
///
|
|
/// The [`u64`] hash is returned by the [`set_native_fn`][Module::set_native_fn] call.
|
|
#[inline]
|
|
pub fn update_fn_namespace(&mut self, hash_fn: u64, namespace: FnNamespace) -> &mut Self {
|
|
if let Some(f) = self.functions.get_mut(&hash_fn) {
|
|
f.namespace = namespace;
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
}
|
|
self
|
|
}
|
|
|
|
/// Remap type ID.
|
|
#[inline]
|
|
#[must_use]
|
|
fn map_type(map: bool, type_id: TypeId) -> TypeId {
|
|
if !map {
|
|
return type_id;
|
|
}
|
|
if type_id == TypeId::of::<&str>() {
|
|
// Map &str to ImmutableString
|
|
return TypeId::of::<ImmutableString>();
|
|
}
|
|
if type_id == TypeId::of::<String>() {
|
|
// Map String to ImmutableString
|
|
return TypeId::of::<ImmutableString>();
|
|
}
|
|
|
|
type_id
|
|
}
|
|
|
|
/// Set a Rust function into the [`Module`], returning a hash key.
|
|
///
|
|
/// If there is an existing Rust function of the same hash, it is replaced.
|
|
///
|
|
/// # WARNING - Low Level API
|
|
///
|
|
/// This function is very low level.
|
|
#[inline]
|
|
pub fn set_fn(
|
|
&mut self,
|
|
name: impl AsRef<str> + Into<Identifier>,
|
|
namespace: FnNamespace,
|
|
access: FnAccess,
|
|
_arg_names: Option<&[&str]>,
|
|
arg_types: &[TypeId],
|
|
func: CallableFunction,
|
|
) -> u64 {
|
|
let is_method = func.is_method();
|
|
|
|
let mut param_types: StaticVec<_> = arg_types
|
|
.iter()
|
|
.cloned()
|
|
.enumerate()
|
|
.map(|(i, type_id)| Self::map_type(!is_method || i > 0, type_id))
|
|
.collect();
|
|
param_types.shrink_to_fit();
|
|
|
|
#[cfg(feature = "metadata")]
|
|
let mut param_names: StaticVec<_> = _arg_names
|
|
.iter()
|
|
.flat_map(|p| p.iter())
|
|
.map(|&arg| self.identifiers.get(arg))
|
|
.collect();
|
|
#[cfg(feature = "metadata")]
|
|
param_names.shrink_to_fit();
|
|
|
|
let hash_fn = calc_native_fn_hash(empty(), name.as_ref(), ¶m_types);
|
|
|
|
self.functions.insert(
|
|
hash_fn,
|
|
FuncInfo {
|
|
name: self.identifiers.get(name),
|
|
namespace,
|
|
access,
|
|
params: param_types.len(),
|
|
param_types,
|
|
#[cfg(feature = "metadata")]
|
|
param_names,
|
|
func: func.into(),
|
|
}
|
|
.into(),
|
|
);
|
|
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
|
|
hash_fn
|
|
}
|
|
|
|
/// Set a Rust function taking a reference to the scripting [`Engine`][crate::Engine],
|
|
/// the current set of functions, plus a list of mutable [`Dynamic`] references
|
|
/// into the [`Module`], returning a hash key.
|
|
///
|
|
/// Use this to register a built-in function which must reference settings on the scripting
|
|
/// [`Engine`][crate::Engine] (e.g. to prevent growing an array beyond the allowed maximum size),
|
|
/// or to call a script-defined function in the current evaluation context.
|
|
///
|
|
/// If there is a similar existing Rust function, it is replaced.
|
|
///
|
|
/// # WARNING - Low Level API
|
|
///
|
|
/// This function is very low level.
|
|
///
|
|
/// # Arguments
|
|
///
|
|
/// A list of [`TypeId`]'s is taken as the argument types.
|
|
///
|
|
/// Arguments are simply passed in as a mutable array of [`&mut Dynamic`][Dynamic],
|
|
/// which is guaranteed to contain enough arguments of the correct types.
|
|
///
|
|
/// The function is assumed to be a _method_, meaning that the first argument should not be consumed.
|
|
/// All other arguments can be consumed.
|
|
///
|
|
/// To access a primary argument value (i.e. cloning is cheap), use: `args[n].as_xxx().unwrap()`
|
|
///
|
|
/// To access an argument value and avoid cloning, use `std::mem::take(args[n]).cast::<T>()`.
|
|
/// Notice that this will _consume_ the argument, replacing it with `()`.
|
|
///
|
|
/// To access the first mutable argument, use `args.get_mut(0).unwrap()`
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered. Use `update_fn_metadata` to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::{Module, FnNamespace, FnAccess};
|
|
///
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_raw_fn("double_or_not", FnNamespace::Internal, FnAccess::Public,
|
|
/// // Pass parameter types via a slice with TypeId's
|
|
/// &[std::any::TypeId::of::<i64>(), std::any::TypeId::of::<bool>()],
|
|
/// // Fixed closure signature
|
|
/// |context, args| {
|
|
/// // 'args' is guaranteed to be the right length and of the correct types
|
|
///
|
|
/// // Get the second parameter by 'consuming' it
|
|
/// let double = std::mem::take(args[1]).cast::<bool>();
|
|
/// // Since it is a primary type, it can also be cheaply copied
|
|
/// let double = args[1].clone_cast::<bool>();
|
|
/// // Get a mutable reference to the first argument.
|
|
/// let mut x = args[0].write_lock::<i64>().unwrap();
|
|
///
|
|
/// let orig = *x;
|
|
///
|
|
/// if double {
|
|
/// *x *= 2; // the first argument can be mutated
|
|
/// }
|
|
///
|
|
/// Ok(orig) // return Result<T, Box<EvalAltResult>>
|
|
/// });
|
|
///
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[inline(always)]
|
|
pub fn set_raw_fn<N, T, F>(
|
|
&mut self,
|
|
name: N,
|
|
namespace: FnNamespace,
|
|
access: FnAccess,
|
|
arg_types: &[TypeId],
|
|
func: F,
|
|
) -> u64
|
|
where
|
|
N: AsRef<str> + Into<Identifier>,
|
|
T: Variant + Clone,
|
|
F: Fn(NativeCallContext, &mut FnCallArgs) -> Result<T, Box<EvalAltResult>>
|
|
+ SendSync
|
|
+ 'static,
|
|
{
|
|
let f =
|
|
move |ctx: NativeCallContext, args: &mut FnCallArgs| func(ctx, args).map(Dynamic::from);
|
|
|
|
self.set_fn(
|
|
name,
|
|
namespace,
|
|
access,
|
|
None,
|
|
arg_types,
|
|
CallableFunction::from_method(Box::new(f)),
|
|
)
|
|
}
|
|
|
|
/// Set a Rust function into the [`Module`], returning a hash key.
|
|
///
|
|
/// If there is a similar existing Rust function, it is replaced.
|
|
///
|
|
/// # Function Namespace
|
|
///
|
|
/// The default function namespace is [`FnNamespace::Internal`].
|
|
/// Use [`update_fn_namespace`][Module::update_fn_namespace] to change it.
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered.
|
|
/// Use [`update_fn_metadata`][Module::update_fn_metadata] to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # use rhai::Module;
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_native_fn("calc", || Ok(42_i64));
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[inline(always)]
|
|
pub fn set_native_fn<ARGS, N, T, F>(&mut self, name: N, func: F) -> u64
|
|
where
|
|
N: AsRef<str> + Into<Identifier>,
|
|
T: Variant + Clone,
|
|
F: RegisterNativeFunction<ARGS, Result<T, Box<EvalAltResult>>>,
|
|
{
|
|
self.set_fn(
|
|
name,
|
|
FnNamespace::Internal,
|
|
FnAccess::Public,
|
|
None,
|
|
&F::param_types(),
|
|
func.into_callable_function(),
|
|
)
|
|
}
|
|
|
|
/// Set a Rust getter function taking one mutable parameter, returning a hash key.
|
|
/// This function is automatically exposed to the global namespace.
|
|
///
|
|
/// If there is a similar existing Rust getter function, it is replaced.
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered. Use `update_fn_metadata` to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # use rhai::Module;
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_getter_fn("value", |x: &mut i64| { Ok(*x) });
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[cfg(not(feature = "no_object"))]
|
|
#[inline(always)]
|
|
pub fn set_getter_fn<ARGS, A, T, F>(&mut self, name: &str, func: F) -> u64
|
|
where
|
|
A: Variant + Clone,
|
|
T: Variant + Clone,
|
|
F: RegisterNativeFunction<ARGS, Result<T, Box<EvalAltResult>>>,
|
|
F: Fn(&mut A) -> Result<T, Box<EvalAltResult>> + SendSync + 'static,
|
|
{
|
|
self.set_fn(
|
|
&crate::engine::make_getter(name),
|
|
FnNamespace::Global,
|
|
FnAccess::Public,
|
|
None,
|
|
&F::param_types(),
|
|
func.into_callable_function(),
|
|
)
|
|
}
|
|
|
|
/// Set a Rust setter function taking two parameters (the first one mutable) into the [`Module`],
|
|
/// returning a hash key.
|
|
/// This function is automatically exposed to the global namespace.
|
|
///
|
|
/// If there is a similar existing setter Rust function, it is replaced.
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered. Use `update_fn_metadata` to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::{Module, ImmutableString};
|
|
///
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_setter_fn("value", |x: &mut i64, y: ImmutableString| {
|
|
/// *x = y.len() as i64;
|
|
/// Ok(())
|
|
/// });
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[cfg(not(feature = "no_object"))]
|
|
#[inline(always)]
|
|
pub fn set_setter_fn<ARGS, A, B, F>(&mut self, name: &str, func: F) -> u64
|
|
where
|
|
A: Variant + Clone,
|
|
B: Variant + Clone,
|
|
F: RegisterNativeFunction<ARGS, Result<(), Box<EvalAltResult>>>,
|
|
F: Fn(&mut A, B) -> Result<(), Box<EvalAltResult>> + SendSync + 'static,
|
|
{
|
|
self.set_fn(
|
|
&crate::engine::make_setter(name),
|
|
FnNamespace::Global,
|
|
FnAccess::Public,
|
|
None,
|
|
&F::param_types(),
|
|
func.into_callable_function(),
|
|
)
|
|
}
|
|
|
|
/// Set a Rust index getter taking two parameters (the first one mutable) into the [`Module`],
|
|
/// returning a hash key.
|
|
/// This function is automatically exposed to the global namespace.
|
|
///
|
|
/// If there is a similar existing setter Rust function, it is replaced.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the type is [`Array`] or [`Map`].
|
|
/// Indexers for arrays, object maps and strings cannot be registered.
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered. Use `update_fn_metadata` to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::{Module, ImmutableString};
|
|
///
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_indexer_get_fn(|x: &mut i64, y: ImmutableString| {
|
|
/// Ok(*x + y.len() as i64)
|
|
/// });
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[cfg(any(not(feature = "no_index"), not(feature = "no_object")))]
|
|
#[inline]
|
|
pub fn set_indexer_get_fn<ARGS, A, B, T, F>(&mut self, func: F) -> u64
|
|
where
|
|
A: Variant + Clone,
|
|
B: Variant + Clone,
|
|
T: Variant + Clone,
|
|
F: RegisterNativeFunction<ARGS, Result<T, Box<EvalAltResult>>>,
|
|
F: Fn(&mut A, B) -> Result<T, Box<EvalAltResult>> + SendSync + 'static,
|
|
{
|
|
#[cfg(not(feature = "no_index"))]
|
|
if TypeId::of::<A>() == TypeId::of::<Array>() {
|
|
panic!("Cannot register indexer for arrays.");
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
if TypeId::of::<A>() == TypeId::of::<Map>() {
|
|
panic!("Cannot register indexer for object maps.");
|
|
}
|
|
if TypeId::of::<A>() == TypeId::of::<String>()
|
|
|| TypeId::of::<A>() == TypeId::of::<&str>()
|
|
|| TypeId::of::<A>() == TypeId::of::<ImmutableString>()
|
|
{
|
|
panic!("Cannot register indexer for strings.");
|
|
}
|
|
|
|
self.set_fn(
|
|
crate::engine::FN_IDX_GET,
|
|
FnNamespace::Global,
|
|
FnAccess::Public,
|
|
None,
|
|
&F::param_types(),
|
|
func.into_callable_function(),
|
|
)
|
|
}
|
|
|
|
/// Set a Rust index setter taking three parameters (the first one mutable) into the [`Module`],
|
|
/// returning a hash key.
|
|
/// This function is automatically exposed to the global namespace.
|
|
///
|
|
/// If there is a similar existing Rust function, it is replaced.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the type is [`Array`] or [`Map`].
|
|
/// Indexers for arrays, object maps and strings cannot be registered.
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered. Use `update_fn_metadata` to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::{Module, ImmutableString};
|
|
///
|
|
/// let mut module = Module::new();
|
|
/// let hash = module.set_indexer_set_fn(|x: &mut i64, y: ImmutableString, value: i64| {
|
|
/// *x = y.len() as i64 + value; Ok(())
|
|
/// });
|
|
/// assert!(module.contains_fn(hash));
|
|
/// ```
|
|
#[cfg(any(not(feature = "no_index"), not(feature = "no_object")))]
|
|
#[inline]
|
|
pub fn set_indexer_set_fn<ARGS, A, B, C, F>(&mut self, func: F) -> u64
|
|
where
|
|
A: Variant + Clone,
|
|
B: Variant + Clone,
|
|
C: Variant + Clone,
|
|
F: RegisterNativeFunction<ARGS, Result<(), Box<EvalAltResult>>>,
|
|
F: Fn(&mut A, B, C) -> Result<(), Box<EvalAltResult>> + SendSync + 'static,
|
|
{
|
|
#[cfg(not(feature = "no_index"))]
|
|
if TypeId::of::<A>() == TypeId::of::<Array>() {
|
|
panic!("Cannot register indexer for arrays.");
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
if TypeId::of::<A>() == TypeId::of::<Map>() {
|
|
panic!("Cannot register indexer for object maps.");
|
|
}
|
|
if TypeId::of::<A>() == TypeId::of::<String>()
|
|
|| TypeId::of::<A>() == TypeId::of::<&str>()
|
|
|| TypeId::of::<A>() == TypeId::of::<ImmutableString>()
|
|
{
|
|
panic!("Cannot register indexer for strings.");
|
|
}
|
|
|
|
self.set_fn(
|
|
crate::engine::FN_IDX_SET,
|
|
FnNamespace::Global,
|
|
FnAccess::Public,
|
|
None,
|
|
&F::param_types(),
|
|
func.into_callable_function(),
|
|
)
|
|
}
|
|
|
|
/// Set a pair of Rust index getter and setter functions, returning both hash keys.
|
|
/// This is a short-hand for [`set_indexer_get_fn`][Module::set_indexer_get_fn] and
|
|
/// [`set_indexer_set_fn`][Module::set_indexer_set_fn].
|
|
///
|
|
/// If there are similar existing Rust functions, they are replaced.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the type is [`Array`] or [`Map`].
|
|
/// Indexers for arrays, object maps and strings cannot be registered.
|
|
///
|
|
/// # Function Metadata
|
|
///
|
|
/// No metadata for the function is registered. Use `update_fn_metadata` to add metadata.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::{Module, ImmutableString};
|
|
///
|
|
/// let mut module = Module::new();
|
|
/// let (hash_get, hash_set) = module.set_indexer_get_set_fn(
|
|
/// |x: &mut i64, y: ImmutableString| {
|
|
/// Ok(*x + y.len() as i64)
|
|
/// },
|
|
/// |x: &mut i64, y: ImmutableString, value: i64| {
|
|
/// *x = y.len() as i64 + value; Ok(())
|
|
/// }
|
|
/// );
|
|
/// assert!(module.contains_fn(hash_get));
|
|
/// assert!(module.contains_fn(hash_set));
|
|
/// ```
|
|
#[cfg(any(not(feature = "no_index"), not(feature = "no_object")))]
|
|
#[inline(always)]
|
|
pub fn set_indexer_get_set_fn<A, B, T>(
|
|
&mut self,
|
|
get_fn: impl Fn(&mut A, B) -> Result<T, Box<EvalAltResult>> + SendSync + 'static,
|
|
set_fn: impl Fn(&mut A, B, T) -> Result<(), Box<EvalAltResult>> + SendSync + 'static,
|
|
) -> (u64, u64)
|
|
where
|
|
A: Variant + Clone,
|
|
B: Variant + Clone,
|
|
T: Variant + Clone,
|
|
{
|
|
(
|
|
self.set_indexer_get_fn(get_fn),
|
|
self.set_indexer_set_fn(set_fn),
|
|
)
|
|
}
|
|
|
|
/// Get a Rust function.
|
|
///
|
|
/// The [`u64`] hash is returned by the [`set_native_fn`][Module::set_native_fn] call.
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub(crate) fn get_fn(&self, hash_fn: u64) -> Option<&CallableFunction> {
|
|
self.functions.get(&hash_fn).map(|f| f.func.as_ref())
|
|
}
|
|
|
|
/// Does the particular namespace-qualified function exist in the [`Module`]?
|
|
///
|
|
/// The [`u64`] hash is calculated by [`build_index`][Module::build_index].
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn contains_qualified_fn(&self, hash_fn: u64) -> bool {
|
|
self.all_functions.contains_key(&hash_fn)
|
|
}
|
|
|
|
/// Get a namespace-qualified function.
|
|
///
|
|
/// The [`u64`] hash is calculated by [`build_index`][Module::build_index].
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub(crate) fn get_qualified_fn(&self, hash_qualified_fn: u64) -> Option<&CallableFunction> {
|
|
self.all_functions
|
|
.get(&hash_qualified_fn)
|
|
.map(|f| f.as_ref())
|
|
}
|
|
|
|
/// Combine another [`Module`] into this [`Module`].
|
|
/// The other [`Module`] is _consumed_ to merge into this [`Module`].
|
|
#[inline]
|
|
pub fn combine(&mut self, other: Self) -> &mut Self {
|
|
self.modules.extend(other.modules.into_iter());
|
|
self.variables.extend(other.variables.into_iter());
|
|
self.functions.extend(other.functions.into_iter());
|
|
self.type_iterators.extend(other.type_iterators.into_iter());
|
|
self.all_functions.clear();
|
|
self.all_variables.clear();
|
|
self.all_type_iterators.clear();
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
self
|
|
}
|
|
|
|
/// Combine another [`Module`] into this [`Module`].
|
|
/// The other [`Module`] is _consumed_ to merge into this [`Module`].
|
|
/// Sub-modules are flattened onto the root [`Module`], with higher level overriding lower level.
|
|
#[inline]
|
|
pub fn combine_flatten(&mut self, other: Self) -> &mut Self {
|
|
other.modules.into_iter().for_each(|(_, m)| {
|
|
self.combine_flatten(shared_take_or_clone(m));
|
|
});
|
|
self.variables.extend(other.variables.into_iter());
|
|
self.functions.extend(other.functions.into_iter());
|
|
self.type_iterators.extend(other.type_iterators.into_iter());
|
|
self.all_functions.clear();
|
|
self.all_variables.clear();
|
|
self.all_type_iterators.clear();
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
self
|
|
}
|
|
|
|
/// Polyfill this [`Module`] with another [`Module`].
|
|
/// Only items not existing in this [`Module`] are added.
|
|
#[inline]
|
|
pub fn fill_with(&mut self, other: &Self) -> &mut Self {
|
|
other.modules.iter().for_each(|(k, v)| {
|
|
if !self.modules.contains_key(k) {
|
|
self.modules.insert(k.clone(), v.clone());
|
|
}
|
|
});
|
|
other.variables.iter().for_each(|(k, v)| {
|
|
if !self.variables.contains_key(k) {
|
|
self.variables.insert(k.clone(), v.clone());
|
|
}
|
|
});
|
|
other.functions.iter().for_each(|(&k, v)| {
|
|
self.functions.entry(k).or_insert_with(|| v.clone());
|
|
});
|
|
other.type_iterators.iter().for_each(|(&k, &v)| {
|
|
self.type_iterators.entry(k).or_insert(v);
|
|
});
|
|
self.all_functions.clear();
|
|
self.all_variables.clear();
|
|
self.all_type_iterators.clear();
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
self
|
|
}
|
|
|
|
/// Merge another [`Module`] into this [`Module`].
|
|
#[inline(always)]
|
|
pub fn merge(&mut self, other: &Self) -> &mut Self {
|
|
self.merge_filtered(other, &|_, _, _, _, _| true)
|
|
}
|
|
|
|
/// Merge another [`Module`] into this [`Module`] based on a filter predicate.
|
|
pub(crate) fn merge_filtered(
|
|
&mut self,
|
|
other: &Self,
|
|
_filter: &impl Fn(FnNamespace, FnAccess, bool, &str, usize) -> bool,
|
|
) -> &mut Self {
|
|
#[cfg(not(feature = "no_function"))]
|
|
other.modules.iter().for_each(|(k, v)| {
|
|
let mut m = Self::new();
|
|
m.merge_filtered(v, _filter);
|
|
self.set_sub_module(k.clone(), m);
|
|
});
|
|
#[cfg(feature = "no_function")]
|
|
self.modules
|
|
.extend(other.modules.iter().map(|(k, v)| (k.clone(), v.clone())));
|
|
|
|
self.variables
|
|
.extend(other.variables.iter().map(|(k, v)| (k.clone(), v.clone())));
|
|
self.functions.extend(
|
|
other
|
|
.functions
|
|
.iter()
|
|
.filter(|(_, f)| {
|
|
_filter(
|
|
f.namespace,
|
|
f.access,
|
|
f.func.is_script(),
|
|
f.name.as_str(),
|
|
f.params,
|
|
)
|
|
})
|
|
.map(|(&k, v)| (k, v.clone())),
|
|
);
|
|
|
|
self.type_iterators.extend(other.type_iterators.iter());
|
|
self.all_functions.clear();
|
|
self.all_variables.clear();
|
|
self.all_type_iterators.clear();
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
self
|
|
}
|
|
|
|
/// Filter out the functions, retaining only some script-defined functions based on a filter predicate.
|
|
#[cfg(not(feature = "no_function"))]
|
|
#[inline]
|
|
pub(crate) fn retain_script_functions(
|
|
&mut self,
|
|
filter: impl Fn(FnNamespace, FnAccess, &str, usize) -> bool,
|
|
) -> &mut Self {
|
|
self.functions = std::mem::take(&mut self.functions)
|
|
.into_iter()
|
|
.filter(|(_, f)| {
|
|
if f.func.is_script() {
|
|
filter(f.namespace, f.access, f.name.as_str(), f.params)
|
|
} else {
|
|
false
|
|
}
|
|
})
|
|
.collect();
|
|
|
|
self.all_functions.clear();
|
|
self.all_variables.clear();
|
|
self.all_type_iterators.clear();
|
|
self.indexed = false;
|
|
self.contains_indexed_global_functions = false;
|
|
self
|
|
}
|
|
|
|
/// Get the number of variables, functions and type iterators in the [`Module`].
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn count(&self) -> (usize, usize, usize) {
|
|
(
|
|
self.variables.len(),
|
|
self.functions.len(),
|
|
self.type_iterators.len(),
|
|
)
|
|
}
|
|
|
|
/// Get an iterator to the sub-modules in the [`Module`].
|
|
#[inline(always)]
|
|
pub fn iter_sub_modules(&self) -> impl Iterator<Item = (&str, Shared<Module>)> {
|
|
self.modules.iter().map(|(k, m)| (k.as_str(), m.clone()))
|
|
}
|
|
|
|
/// Get an iterator to the variables in the [`Module`].
|
|
#[inline(always)]
|
|
pub fn iter_var(&self) -> impl Iterator<Item = (&str, &Dynamic)> {
|
|
self.variables.iter().map(|(k, v)| (k.as_str(), v))
|
|
}
|
|
|
|
/// Get an iterator to the functions in the [`Module`].
|
|
#[inline(always)]
|
|
#[allow(dead_code)]
|
|
pub(crate) fn iter_fn(&self) -> impl Iterator<Item = &FuncInfo> {
|
|
self.functions.values().map(Box::as_ref)
|
|
}
|
|
|
|
/// Get an iterator over all script-defined functions in the [`Module`].
|
|
///
|
|
/// Function metadata includes:
|
|
/// 1) Namespace ([`FnNamespace::Global`] or [`FnNamespace::Internal`]).
|
|
/// 2) Access mode ([`FnAccess::Public`] or [`FnAccess::Private`]).
|
|
/// 3) Function name (as string slice).
|
|
/// 4) Number of parameters.
|
|
/// 5) Shared reference to function definition [`ScriptFnDef`][crate::ast::ScriptFnDef].
|
|
#[cfg(not(feature = "no_function"))]
|
|
#[inline(always)]
|
|
pub(crate) fn iter_script_fn(
|
|
&self,
|
|
) -> impl Iterator<
|
|
Item = (
|
|
FnNamespace,
|
|
FnAccess,
|
|
&str,
|
|
usize,
|
|
&Shared<crate::ast::ScriptFnDef>,
|
|
),
|
|
> + '_ {
|
|
self.functions
|
|
.values()
|
|
.filter(|f| f.func.is_script())
|
|
.map(|f| {
|
|
(
|
|
f.namespace,
|
|
f.access,
|
|
f.name.as_str(),
|
|
f.params,
|
|
f.func.get_script_fn_def().expect("scripted function"),
|
|
)
|
|
})
|
|
}
|
|
|
|
/// Get an iterator over all script-defined functions in the [`Module`].
|
|
///
|
|
/// Function metadata includes:
|
|
/// 1) Namespace ([`FnNamespace::Global`] or [`FnNamespace::Internal`]).
|
|
/// 2) Access mode ([`FnAccess::Public`] or [`FnAccess::Private`]).
|
|
/// 3) Function name (as string slice).
|
|
/// 4) Number of parameters.
|
|
#[cfg(not(feature = "no_function"))]
|
|
#[cfg(not(feature = "internals"))]
|
|
#[inline(always)]
|
|
pub fn iter_script_fn_info(
|
|
&self,
|
|
) -> impl Iterator<Item = (FnNamespace, FnAccess, &str, usize)> {
|
|
self.functions
|
|
.values()
|
|
.filter(|f| f.func.is_script())
|
|
.map(|f| (f.namespace, f.access, f.name.as_str(), f.params))
|
|
}
|
|
|
|
/// _(internals)_ Get an iterator over all script-defined functions in the [`Module`].
|
|
/// Exported under the `internals` feature only.
|
|
///
|
|
/// Function metadata includes:
|
|
/// 1) Namespace ([`FnNamespace::Global`] or [`FnNamespace::Internal`]).
|
|
/// 2) Access mode ([`FnAccess::Public`] or [`FnAccess::Private`]).
|
|
/// 3) Function name (as string slice).
|
|
/// 4) Number of parameters.
|
|
/// 5) _(internals)_ Shared reference to function definition [`ScriptFnDef`][crate::ast::ScriptFnDef].
|
|
#[cfg(not(feature = "no_function"))]
|
|
#[cfg(feature = "internals")]
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn iter_script_fn_info(
|
|
&self,
|
|
) -> impl Iterator<
|
|
Item = (
|
|
FnNamespace,
|
|
FnAccess,
|
|
&str,
|
|
usize,
|
|
&Shared<crate::ast::ScriptFnDef>,
|
|
),
|
|
> {
|
|
self.iter_script_fn()
|
|
}
|
|
|
|
/// Create a new [`Module`] by evaluating an [`AST`][crate::AST].
|
|
///
|
|
/// The entire [`AST`][crate::AST] is encapsulated into each function, allowing functions
|
|
/// to cross-call each other. Functions in the global namespace, plus all functions
|
|
/// defined in the [`Module`], are _merged_ into a _unified_ namespace before each call.
|
|
/// Therefore, all functions will be found.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// # fn main() -> Result<(), Box<rhai::EvalAltResult>> {
|
|
/// use rhai::{Engine, Module, Scope};
|
|
///
|
|
/// let engine = Engine::new();
|
|
/// let ast = engine.compile("let answer = 42; export answer;")?;
|
|
/// let module = Module::eval_ast_as_new(Scope::new(), &ast, &engine)?;
|
|
/// assert!(module.contains_var("answer"));
|
|
/// assert_eq!(module.get_var_value::<i64>("answer").expect("answer should exist"), 42);
|
|
/// # Ok(())
|
|
/// # }
|
|
/// ```
|
|
#[cfg(not(feature = "no_module"))]
|
|
pub fn eval_ast_as_new(
|
|
mut scope: crate::Scope,
|
|
ast: &crate::AST,
|
|
engine: &crate::Engine,
|
|
) -> Result<Self, Box<EvalAltResult>> {
|
|
let mut mods = crate::engine::Imports::new();
|
|
let orig_mods_len = mods.len();
|
|
|
|
// Run the script
|
|
engine.eval_ast_with_scope_raw(&mut scope, &mut mods, &ast, 0)?;
|
|
|
|
// Create new module
|
|
let mut module = Module::new();
|
|
|
|
scope.into_iter().for_each(|(_, value, mut aliases)| {
|
|
// Variables with an alias left in the scope become module variables
|
|
match aliases.len() {
|
|
0 => (),
|
|
1 => {
|
|
let alias = aliases.pop().expect("list has one item");
|
|
module.set_var(alias, value);
|
|
}
|
|
_ => aliases.into_iter().for_each(|alias| {
|
|
module.set_var(alias, value.clone());
|
|
}),
|
|
}
|
|
});
|
|
|
|
// Extra modules left in the scope become sub-modules
|
|
let mut func_mods = crate::engine::Imports::new();
|
|
|
|
mods.into_iter().skip(orig_mods_len).for_each(|(alias, m)| {
|
|
func_mods.push(alias.clone(), m.clone());
|
|
module.set_sub_module(alias, m);
|
|
});
|
|
|
|
// Non-private functions defined become module functions
|
|
#[cfg(not(feature = "no_function"))]
|
|
ast.lib()
|
|
.functions
|
|
.values()
|
|
.filter(|f| match f.access {
|
|
FnAccess::Public => true,
|
|
FnAccess::Private => false,
|
|
})
|
|
.filter(|f| f.func.is_script())
|
|
.for_each(|f| {
|
|
// Encapsulate AST environment
|
|
let mut func = f
|
|
.func
|
|
.get_script_fn_def()
|
|
.expect("scripted function")
|
|
.as_ref()
|
|
.clone();
|
|
func.lib = Some(ast.shared_lib());
|
|
func.mods = func_mods.clone();
|
|
module.set_script_fn(func);
|
|
});
|
|
|
|
if let Some(s) = ast.source_raw() {
|
|
module.set_id(s.clone());
|
|
} else {
|
|
module.clear_id();
|
|
}
|
|
|
|
module.build_index();
|
|
|
|
Ok(module)
|
|
}
|
|
|
|
/// Does the [`Module`] contain indexed functions that have been exposed to the global namespace?
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the [`Module`] is not yet indexed via [`build_index`][Module::build_index].
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn contains_indexed_global_functions(&self) -> bool {
|
|
self.contains_indexed_global_functions
|
|
}
|
|
|
|
/// Scan through all the sub-modules in the [`Module`] and build a hash index of all
|
|
/// variables and functions as one flattened namespace.
|
|
///
|
|
/// If the [`Module`] is already indexed, this method has no effect.
|
|
pub fn build_index(&mut self) -> &mut Self {
|
|
// Collect a particular module.
|
|
fn index_module<'a>(
|
|
module: &'a Module,
|
|
path: &mut Vec<&'a str>,
|
|
variables: &mut BTreeMap<u64, Dynamic>,
|
|
functions: &mut BTreeMap<u64, Shared<CallableFunction>>,
|
|
type_iterators: &mut BTreeMap<TypeId, IteratorFn>,
|
|
) -> bool {
|
|
let mut contains_indexed_global_functions = false;
|
|
|
|
module.modules.iter().for_each(|(name, m)| {
|
|
// Index all the sub-modules first.
|
|
path.push(name);
|
|
if index_module(m, path, variables, functions, type_iterators) {
|
|
contains_indexed_global_functions = true;
|
|
}
|
|
path.pop();
|
|
});
|
|
|
|
// Index all variables
|
|
module.variables.iter().for_each(|(var_name, value)| {
|
|
let hash_var = crate::calc_qualified_var_hash(path.iter().copied(), var_name);
|
|
variables.insert(hash_var, value.clone());
|
|
});
|
|
|
|
// Index type iterators
|
|
module.type_iterators.iter().for_each(|(&type_id, func)| {
|
|
type_iterators.insert(type_id, *func);
|
|
contains_indexed_global_functions = true;
|
|
});
|
|
|
|
// Index all Rust functions
|
|
module.functions.iter().for_each(|(&hash, f)| {
|
|
match f.namespace {
|
|
FnNamespace::Global => {
|
|
// Flatten all functions with global namespace
|
|
functions.insert(hash, f.func.clone());
|
|
contains_indexed_global_functions = true;
|
|
}
|
|
FnNamespace::Internal => (),
|
|
}
|
|
match f.access {
|
|
FnAccess::Public => (),
|
|
FnAccess::Private => return, // Do not index private functions
|
|
}
|
|
|
|
if !f.func.is_script() {
|
|
let hash_qualified_fn =
|
|
calc_native_fn_hash(path.iter().cloned(), f.name.as_str(), &f.param_types);
|
|
functions.insert(hash_qualified_fn, f.func.clone());
|
|
} else if cfg!(not(feature = "no_function")) {
|
|
let hash_qualified_script = crate::calc_qualified_fn_hash(
|
|
path.iter().cloned(),
|
|
f.name.as_str(),
|
|
f.params,
|
|
);
|
|
functions.insert(hash_qualified_script, f.func.clone());
|
|
}
|
|
});
|
|
|
|
contains_indexed_global_functions
|
|
}
|
|
|
|
if !self.indexed {
|
|
let mut path = Vec::with_capacity(4);
|
|
let mut variables = Default::default();
|
|
let mut functions = Default::default();
|
|
let mut type_iterators = Default::default();
|
|
|
|
path.push("");
|
|
|
|
self.contains_indexed_global_functions = index_module(
|
|
self,
|
|
&mut path,
|
|
&mut variables,
|
|
&mut functions,
|
|
&mut type_iterators,
|
|
);
|
|
|
|
self.all_variables = variables;
|
|
self.all_functions = functions;
|
|
self.all_type_iterators = type_iterators;
|
|
self.indexed = true;
|
|
}
|
|
|
|
self
|
|
}
|
|
|
|
/// Does a type iterator exist in the entire module tree?
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn contains_qualified_iter(&self, id: TypeId) -> bool {
|
|
self.all_type_iterators.contains_key(&id)
|
|
}
|
|
|
|
/// Does a type iterator exist in the module?
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn contains_iter(&self, id: TypeId) -> bool {
|
|
self.type_iterators.contains_key(&id)
|
|
}
|
|
|
|
/// Set a type iterator into the [`Module`].
|
|
#[inline]
|
|
pub fn set_iter(&mut self, type_id: TypeId, func: IteratorFn) -> &mut Self {
|
|
if self.indexed {
|
|
self.all_type_iterators.insert(type_id, func);
|
|
self.contains_indexed_global_functions = true;
|
|
}
|
|
self.type_iterators.insert(type_id, func);
|
|
self
|
|
}
|
|
|
|
/// Set a type iterator into the [`Module`].
|
|
#[inline(always)]
|
|
pub fn set_iterable<T>(&mut self) -> &mut Self
|
|
where
|
|
T: Variant + Clone + IntoIterator,
|
|
<T as IntoIterator>::Item: Variant + Clone,
|
|
{
|
|
self.set_iter(TypeId::of::<T>(), |obj: Dynamic| {
|
|
Box::new(obj.cast::<T>().into_iter().map(Dynamic::from))
|
|
})
|
|
}
|
|
|
|
/// Set an iterator type into the [`Module`] as a type iterator.
|
|
#[inline(always)]
|
|
pub fn set_iterator<T>(&mut self) -> &mut Self
|
|
where
|
|
T: Variant + Clone + Iterator,
|
|
<T as Iterator>::Item: Variant + Clone,
|
|
{
|
|
self.set_iter(TypeId::of::<T>(), |obj: Dynamic| {
|
|
Box::new(obj.cast::<T>().map(Dynamic::from))
|
|
})
|
|
}
|
|
|
|
/// Get the specified type iterator.
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub(crate) fn get_qualified_iter(&self, id: TypeId) -> Option<IteratorFn> {
|
|
self.all_type_iterators.get(&id).cloned()
|
|
}
|
|
|
|
/// Get the specified type iterator.
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub(crate) fn get_iter(&self, id: TypeId) -> Option<IteratorFn> {
|
|
self.type_iterators.get(&id).cloned()
|
|
}
|
|
}
|
|
|
|
/// _(internals)_ A chain of [module][Module] names to namespace-qualify a variable or function call.
|
|
/// Exported under the `internals` feature only.
|
|
///
|
|
/// A [`u64`] offset to the current [`Scope`][crate::Scope] is cached for quick search purposes.
|
|
///
|
|
/// A [`StaticVec`] is used because most namespace-qualified access contains only one level,
|
|
/// and it is wasteful to always allocate a [`Vec`] with one element.
|
|
///
|
|
/// # Volatile Data Structure
|
|
///
|
|
/// This type is volatile and may change.
|
|
#[derive(Clone, Eq, PartialEq, Default, Hash)]
|
|
pub struct NamespaceRef {
|
|
index: Option<NonZeroUsize>,
|
|
path: StaticVec<Ident>,
|
|
}
|
|
|
|
impl fmt::Debug for NamespaceRef {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
if let Some(index) = self.index {
|
|
write!(f, "{} -> ", index)?;
|
|
}
|
|
|
|
f.write_str(
|
|
&self
|
|
.path
|
|
.iter()
|
|
.map(|Ident { name, .. }| name.as_str())
|
|
.collect::<StaticVec<_>>()
|
|
.join("::"),
|
|
)
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for NamespaceRef {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
for Ident { name, .. } in self.path.iter() {
|
|
write!(f, "{}{}", name, Token::DoubleColon.syntax())?;
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl Deref for NamespaceRef {
|
|
type Target = StaticVec<Ident>;
|
|
|
|
#[inline(always)]
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.path
|
|
}
|
|
}
|
|
|
|
impl DerefMut for NamespaceRef {
|
|
#[inline(always)]
|
|
fn deref_mut(&mut self) -> &mut Self::Target {
|
|
&mut self.path
|
|
}
|
|
}
|
|
|
|
impl From<StaticVec<Ident>> for NamespaceRef {
|
|
#[inline(always)]
|
|
fn from(path: StaticVec<Ident>) -> Self {
|
|
let mut path = path;
|
|
path.shrink_to_fit();
|
|
Self { index: None, path }
|
|
}
|
|
}
|
|
|
|
impl NamespaceRef {
|
|
/// Create a new [`NamespaceRef`].
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn new() -> Self {
|
|
Self {
|
|
index: None,
|
|
path: StaticVec::new(),
|
|
}
|
|
}
|
|
/// Get the [`Scope`][crate::Scope] index offset.
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub(crate) const fn index(&self) -> Option<NonZeroUsize> {
|
|
self.index
|
|
}
|
|
/// Set the [`Scope`][crate::Scope] index offset.
|
|
#[cfg(not(feature = "no_module"))]
|
|
#[inline(always)]
|
|
pub(crate) fn set_index(&mut self, index: Option<NonZeroUsize>) {
|
|
self.index = index
|
|
}
|
|
}
|
|
|
|
#[cfg(not(feature = "no_module"))]
|
|
pub use resolvers::ModuleResolver;
|
|
|
|
/// Module containing all built-in [module resolvers][ModuleResolver].
|
|
#[cfg(not(feature = "no_module"))]
|
|
pub mod resolvers;
|