Merge pull request #75 from ISibboI/isibboi/i73_add_call_function
Change context trait.
This commit is contained in:
commit
4b3ae378a8
@ -1,33 +1,50 @@
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//! A context defines methods to retrieve variable values and call functions for literals in an expression tree.
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//! If mutable, it also allows to assign to variables.
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//!
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//! This crate implements two basic variants, the `EmptyContext`, that returns `None` for each identifier and cannot be manipulated, and the `HashMapContext`, that stores its mappings in hash maps.
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//! The HashMapContext is type-safe and returns an error if the user tries to assign a value of a different type than before to an identifier.
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use std::collections::HashMap;
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use std::collections::HashMap;
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use crate::{function::Function, value::value_type::ValueType, EvalexprError, EvalexprResult};
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use crate::{function::Function, value::value_type::ValueType, EvalexprError, EvalexprResult};
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use crate::value::Value;
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use crate::value::Value;
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/// A mutable context for an expression tree.
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/// An immutable context.
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///
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/// A context defines methods to retrieve values and functions for literals in an expression tree.
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/// In addition, it also allows the manipulation of values and functions.
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/// This crate implements two basic variants, the `EmptyContext`, that returns `None` for each identifier and cannot be manipulated, and the `HashMapContext`, that stores its mappings in hash maps.
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/// The HashMapContext is type-safe and returns an error if the user tries to assign a value of a different type than before to an identifier.
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pub trait Context {
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pub trait Context {
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/// Returns the value that is linked to the given identifier.
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/// Returns the value that is linked to the given identifier.
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fn get_value(&self, identifier: &str) -> Option<&Value>;
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fn get_value(&self, identifier: &str) -> Option<&Value>;
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/// Returns the function that is linked to the given identifier.
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/// Calls the function that is linked to the given identifier with the given argument.
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fn get_function(&self, identifier: &str) -> Option<&Function>;
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/// If no function with the given identifier is found, this method returns `EvalexprError::FunctionIdentifierNotFound`.
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fn call_function(&self, identifier: &str, argument: &Value) -> EvalexprResult<Value>;
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}
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/// Links the given value to the given identifier.
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/// A context that allows to assign to variables.
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pub trait ContextWithMutableVariables: Context {
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/// Sets the variable with the given identifier to the given value.
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fn set_value(&mut self, _identifier: String, _value: Value) -> EvalexprResult<()> {
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fn set_value(&mut self, _identifier: String, _value: Value) -> EvalexprResult<()> {
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Err(EvalexprError::ContextNotManipulable)
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Err(EvalexprError::ContextNotMutable)
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}
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}
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}
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/// Links the given function to the given identifier.
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/// A context that allows to assign to function identifiers.
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pub trait ContextWithMutableFunctions: Context {
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/// Sets the function with the given identifier to the given function.
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fn set_function(&mut self, _identifier: String, _function: Function) -> EvalexprResult<()> {
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fn set_function(&mut self, _identifier: String, _function: Function) -> EvalexprResult<()> {
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Err(EvalexprError::ContextNotManipulable)
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Err(EvalexprError::ContextNotMutable)
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}
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}
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}
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}
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/*/// A context that allows to retrieve functions programmatically.
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pub trait GetFunctionContext: Context {
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/// Returns the function that is linked to the given identifier.
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///
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/// This might not be possible for all functions, as some might be hard-coded.
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/// In this case, a special error variant should be returned (Not yet implemented).
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fn get_function(&self, identifier: &str) -> Option<&Function>;
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}*/
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/// A context that returns `None` for each identifier.
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/// A context that returns `None` for each identifier.
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pub struct EmptyContext;
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pub struct EmptyContext;
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@ -36,8 +53,10 @@ impl Context for EmptyContext {
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None
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None
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}
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}
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fn get_function(&self, _identifier: &str) -> Option<&Function> {
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fn call_function(&self, identifier: &str, _argument: &Value) -> EvalexprResult<Value> {
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None
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Err(EvalexprError::FunctionIdentifierNotFound(
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identifier.to_string(),
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))
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}
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}
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}
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}
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@ -66,10 +85,18 @@ impl Context for HashMapContext {
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self.variables.get(identifier)
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self.variables.get(identifier)
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}
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}
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fn get_function(&self, identifier: &str) -> Option<&Function> {
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fn call_function(&self, identifier: &str, argument: &Value) -> EvalexprResult<Value> {
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self.functions.get(identifier)
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if let Some(function) = self.functions.get(identifier) {
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function.call(argument)
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} else {
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Err(EvalexprError::FunctionIdentifierNotFound(
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identifier.to_string(),
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))
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}
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}
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}
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}
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impl ContextWithMutableVariables for HashMapContext {
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fn set_value(&mut self, identifier: String, value: Value) -> EvalexprResult<()> {
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fn set_value(&mut self, identifier: String, value: Value) -> EvalexprResult<()> {
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if let Some(existing_value) = self.variables.get_mut(&identifier) {
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if let Some(existing_value) = self.variables.get_mut(&identifier) {
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if ValueType::from(&existing_value) == ValueType::from(&value) {
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if ValueType::from(&existing_value) == ValueType::from(&value) {
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@ -84,7 +111,9 @@ impl Context for HashMapContext {
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self.variables.insert(identifier, value);
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self.variables.insert(identifier, value);
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Ok(())
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Ok(())
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}
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}
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}
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impl ContextWithMutableFunctions for HashMapContext {
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fn set_function(&mut self, identifier: String, function: Function) -> EvalexprResult<()> {
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fn set_function(&mut self, identifier: String, function: Function) -> EvalexprResult<()> {
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self.functions.insert(identifier, function);
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self.functions.insert(identifier, function);
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Ok(())
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Ok(())
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@ -106,7 +106,7 @@ impl fmt::Display for EvalexprError {
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"Regular expression {:?} is invalid: {:?}",
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"Regular expression {:?} is invalid: {:?}",
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regex, message
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regex, message
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),
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),
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ContextNotManipulable => write!(f, "Cannot manipulate context"),
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ContextNotMutable => write!(f, "Cannot manipulate context"),
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IllegalEscapeSequence(string) => write!(f, "Illegal escape sequence: {}", string),
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IllegalEscapeSequence(string) => write!(f, "Illegal escape sequence: {}", string),
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CustomMessage(message) => write!(f, "Error: {}", message),
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CustomMessage(message) => write!(f, "Error: {}", message),
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}
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}
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@ -191,7 +191,7 @@ pub enum EvalexprError {
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},
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},
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/// A modification was attempted on a `Context` that does not allow modifications.
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/// A modification was attempted on a `Context` that does not allow modifications.
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ContextNotManipulable,
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ContextNotMutable,
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/// An escape sequence within a string literal is illegal.
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/// An escape sequence within a string literal is illegal.
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IllegalEscapeSequence(String),
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IllegalEscapeSequence(String),
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@ -1,6 +1,6 @@
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use crate::{
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use crate::{
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token, tree, value::TupleType, Context, EmptyType, EvalexprError, EvalexprResult, FloatType,
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token, tree, value::TupleType, Context, ContextWithMutableVariables, EmptyType, EvalexprError,
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HashMapContext, IntType, Node, Value, EMPTY_VALUE,
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EvalexprResult, FloatType, HashMapContext, IntType, Node, Value, EMPTY_VALUE,
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};
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};
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/// Evaluate the given expression string.
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/// Evaluate the given expression string.
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@ -33,7 +33,7 @@ pub fn eval(string: &str) -> EvalexprResult<Value> {
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/// ```
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/// ```
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_with_context(string: &str, context: &dyn Context) -> EvalexprResult<Value> {
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pub fn eval_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<Value> {
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tree::tokens_to_operator_tree(token::tokenize(string)?)?.eval_with_context(context)
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tree::tokens_to_operator_tree(token::tokenize(string)?)?.eval_with_context(context)
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}
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}
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@ -52,7 +52,10 @@ pub fn eval_with_context(string: &str, context: &dyn Context) -> EvalexprResult<
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/// ```
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/// ```
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_with_context_mut(string: &str, context: &mut dyn Context) -> EvalexprResult<Value> {
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pub fn eval_with_context_mut<C: ContextWithMutableVariables>(
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string: &str,
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context: &mut C,
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) -> EvalexprResult<Value> {
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tree::tokens_to_operator_tree(token::tokenize(string)?)?.eval_with_context_mut(context)
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tree::tokens_to_operator_tree(token::tokenize(string)?)?.eval_with_context_mut(context)
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}
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}
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@ -137,7 +140,7 @@ pub fn eval_empty(string: &str) -> EvalexprResult<EmptyType> {
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/// Evaluate the given expression string into a string with the given context.
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/// Evaluate the given expression string into a string with the given context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_string_with_context(string: &str, context: &dyn Context) -> EvalexprResult<String> {
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pub fn eval_string_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<String> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::String(string)) => Ok(string),
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Ok(Value::String(string)) => Ok(string),
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Ok(value) => Err(EvalexprError::expected_string(value)),
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Ok(value) => Err(EvalexprError::expected_string(value)),
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@ -148,7 +151,7 @@ pub fn eval_string_with_context(string: &str, context: &dyn Context) -> Evalexpr
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/// Evaluate the given expression string into an integer with the given context.
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/// Evaluate the given expression string into an integer with the given context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_int_with_context(string: &str, context: &dyn Context) -> EvalexprResult<IntType> {
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pub fn eval_int_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<IntType> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::Int(int)) => Ok(int),
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Ok(Value::Int(int)) => Ok(int),
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Ok(value) => Err(EvalexprError::expected_int(value)),
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Ok(value) => Err(EvalexprError::expected_int(value)),
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@ -159,7 +162,7 @@ pub fn eval_int_with_context(string: &str, context: &dyn Context) -> EvalexprRes
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/// Evaluate the given expression string into a float with the given context.
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/// Evaluate the given expression string into a float with the given context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_float_with_context(string: &str, context: &dyn Context) -> EvalexprResult<FloatType> {
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pub fn eval_float_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<FloatType> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::Float(float)) => Ok(float),
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Ok(Value::Float(float)) => Ok(float),
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Ok(value) => Err(EvalexprError::expected_float(value)),
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Ok(value) => Err(EvalexprError::expected_float(value)),
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@ -171,7 +174,10 @@ pub fn eval_float_with_context(string: &str, context: &dyn Context) -> EvalexprR
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/// If the result of the expression is an integer, it is silently converted into a float.
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/// If the result of the expression is an integer, it is silently converted into a float.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_number_with_context(string: &str, context: &dyn Context) -> EvalexprResult<FloatType> {
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pub fn eval_number_with_context<C: Context>(
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string: &str,
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context: &C,
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) -> EvalexprResult<FloatType> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::Float(float)) => Ok(float),
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Ok(Value::Float(float)) => Ok(float),
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Ok(Value::Int(int)) => Ok(int as FloatType),
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Ok(Value::Int(int)) => Ok(int as FloatType),
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@ -183,7 +189,7 @@ pub fn eval_number_with_context(string: &str, context: &dyn Context) -> Evalexpr
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/// Evaluate the given expression string into a boolean with the given context.
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/// Evaluate the given expression string into a boolean with the given context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_boolean_with_context(string: &str, context: &dyn Context) -> EvalexprResult<bool> {
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pub fn eval_boolean_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<bool> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::Boolean(boolean)) => Ok(boolean),
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Ok(Value::Boolean(boolean)) => Ok(boolean),
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Ok(value) => Err(EvalexprError::expected_boolean(value)),
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Ok(value) => Err(EvalexprError::expected_boolean(value)),
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@ -194,7 +200,7 @@ pub fn eval_boolean_with_context(string: &str, context: &dyn Context) -> Evalexp
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/// Evaluate the given expression string into a tuple with the given context.
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/// Evaluate the given expression string into a tuple with the given context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_tuple_with_context(string: &str, context: &dyn Context) -> EvalexprResult<TupleType> {
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pub fn eval_tuple_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<TupleType> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::Tuple(tuple)) => Ok(tuple),
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Ok(Value::Tuple(tuple)) => Ok(tuple),
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Ok(value) => Err(EvalexprError::expected_tuple(value)),
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Ok(value) => Err(EvalexprError::expected_tuple(value)),
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@ -205,7 +211,7 @@ pub fn eval_tuple_with_context(string: &str, context: &dyn Context) -> EvalexprR
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/// Evaluate the given expression string into an empty value with the given context.
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/// Evaluate the given expression string into an empty value with the given context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_empty_with_context(string: &str, context: &dyn Context) -> EvalexprResult<EmptyType> {
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pub fn eval_empty_with_context<C: Context>(string: &str, context: &C) -> EvalexprResult<EmptyType> {
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match eval_with_context(string, context) {
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match eval_with_context(string, context) {
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Ok(Value::Empty) => Ok(EMPTY_VALUE),
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Ok(Value::Empty) => Ok(EMPTY_VALUE),
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Ok(value) => Err(EvalexprError::expected_empty(value)),
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Ok(value) => Err(EvalexprError::expected_empty(value)),
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@ -216,9 +222,9 @@ pub fn eval_empty_with_context(string: &str, context: &dyn Context) -> EvalexprR
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/// Evaluate the given expression string into a string with the given mutable context.
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/// Evaluate the given expression string into a string with the given mutable context.
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///
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///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_string_with_context_mut(
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pub fn eval_string_with_context_mut<C: ContextWithMutableVariables>(
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string: &str,
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string: &str,
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context: &mut dyn Context,
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context: &mut C,
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) -> EvalexprResult<String> {
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) -> EvalexprResult<String> {
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match eval_with_context_mut(string, context) {
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match eval_with_context_mut(string, context) {
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Ok(Value::String(string)) => Ok(string),
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Ok(Value::String(string)) => Ok(string),
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@ -230,9 +236,9 @@ pub fn eval_string_with_context_mut(
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/// Evaluate the given expression string into an integer with the given mutable context.
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/// Evaluate the given expression string into an integer with the given mutable context.
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///
|
///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_int_with_context_mut(
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pub fn eval_int_with_context_mut<C: ContextWithMutableVariables>(
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string: &str,
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string: &str,
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context: &mut dyn Context,
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context: &mut C,
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) -> EvalexprResult<IntType> {
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) -> EvalexprResult<IntType> {
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match eval_with_context_mut(string, context) {
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match eval_with_context_mut(string, context) {
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Ok(Value::Int(int)) => Ok(int),
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Ok(Value::Int(int)) => Ok(int),
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@ -244,9 +250,9 @@ pub fn eval_int_with_context_mut(
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/// Evaluate the given expression string into a float with the given mutable context.
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/// Evaluate the given expression string into a float with the given mutable context.
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///
|
///
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/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
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pub fn eval_float_with_context_mut(
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pub fn eval_float_with_context_mut<C: ContextWithMutableVariables>(
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string: &str,
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string: &str,
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context: &mut dyn Context,
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context: &mut C,
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) -> EvalexprResult<FloatType> {
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) -> EvalexprResult<FloatType> {
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match eval_with_context_mut(string, context) {
|
match eval_with_context_mut(string, context) {
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Ok(Value::Float(float)) => Ok(float),
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Ok(Value::Float(float)) => Ok(float),
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@ -259,9 +265,9 @@ pub fn eval_float_with_context_mut(
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/// If the result of the expression is an integer, it is silently converted into a float.
|
/// If the result of the expression is an integer, it is silently converted into a float.
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///
|
///
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||||||
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
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pub fn eval_number_with_context_mut(
|
pub fn eval_number_with_context_mut<C: ContextWithMutableVariables>(
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string: &str,
|
string: &str,
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context: &mut dyn Context,
|
context: &mut C,
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) -> EvalexprResult<FloatType> {
|
) -> EvalexprResult<FloatType> {
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match eval_with_context_mut(string, context) {
|
match eval_with_context_mut(string, context) {
|
||||||
Ok(Value::Float(float)) => Ok(float),
|
Ok(Value::Float(float)) => Ok(float),
|
||||||
@ -274,9 +280,9 @@ pub fn eval_number_with_context_mut(
|
|||||||
/// Evaluate the given expression string into a boolean with the given mutable context.
|
/// Evaluate the given expression string into a boolean with the given mutable context.
|
||||||
///
|
///
|
||||||
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
||||||
pub fn eval_boolean_with_context_mut(
|
pub fn eval_boolean_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
string: &str,
|
string: &str,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<bool> {
|
) -> EvalexprResult<bool> {
|
||||||
match eval_with_context_mut(string, context) {
|
match eval_with_context_mut(string, context) {
|
||||||
Ok(Value::Boolean(boolean)) => Ok(boolean),
|
Ok(Value::Boolean(boolean)) => Ok(boolean),
|
||||||
@ -288,9 +294,9 @@ pub fn eval_boolean_with_context_mut(
|
|||||||
/// Evaluate the given expression string into a tuple with the given mutable context.
|
/// Evaluate the given expression string into a tuple with the given mutable context.
|
||||||
///
|
///
|
||||||
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
||||||
pub fn eval_tuple_with_context_mut(
|
pub fn eval_tuple_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
string: &str,
|
string: &str,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<TupleType> {
|
) -> EvalexprResult<TupleType> {
|
||||||
match eval_with_context_mut(string, context) {
|
match eval_with_context_mut(string, context) {
|
||||||
Ok(Value::Tuple(tuple)) => Ok(tuple),
|
Ok(Value::Tuple(tuple)) => Ok(tuple),
|
||||||
@ -302,9 +308,9 @@ pub fn eval_tuple_with_context_mut(
|
|||||||
/// Evaluate the given expression string into an empty value with the given mutable context.
|
/// Evaluate the given expression string into an empty value with the given mutable context.
|
||||||
///
|
///
|
||||||
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
/// *See the [crate doc](index.html) for more examples and explanations of the expression format.*
|
||||||
pub fn eval_empty_with_context_mut(
|
pub fn eval_empty_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
string: &str,
|
string: &str,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<EmptyType> {
|
) -> EvalexprResult<EmptyType> {
|
||||||
match eval_with_context_mut(string, context) {
|
match eval_with_context_mut(string, context) {
|
||||||
Ok(Value::Empty) => Ok(EMPTY_VALUE),
|
Ok(Value::Empty) => Ok(EMPTY_VALUE),
|
||||||
|
@ -196,7 +196,7 @@
|
|||||||
//! use evalexpr::*;
|
//! use evalexpr::*;
|
||||||
//!
|
//!
|
||||||
//! let mut context = HashMapContext::new();
|
//! let mut context = HashMapContext::new();
|
||||||
//! assert_eq!(eval_with_context("a = 5", &context), Err(EvalexprError::ContextNotManipulable));
|
//! assert_eq!(eval_with_context("a = 5", &context), Err(EvalexprError::ContextNotMutable));
|
||||||
//! assert_eq!(eval_empty_with_context_mut("a = 5", &mut context), Ok(EMPTY_VALUE));
|
//! assert_eq!(eval_empty_with_context_mut("a = 5", &mut context), Ok(EMPTY_VALUE));
|
||||||
//! assert_eq!(eval_empty_with_context_mut("a = 5.0", &mut context),
|
//! assert_eq!(eval_empty_with_context_mut("a = 5.0", &mut context),
|
||||||
//! Err(EvalexprError::expected_int(5.0.into())));
|
//! Err(EvalexprError::expected_int(5.0.into())));
|
||||||
@ -259,7 +259,7 @@
|
|||||||
//! let mut context = HashMapContext::new();
|
//! let mut context = HashMapContext::new();
|
||||||
//! assert_eq!(eval_with_context_mut("a = 5;", &mut context), Ok(Value::from(())));
|
//! assert_eq!(eval_with_context_mut("a = 5;", &mut context), Ok(Value::from(())));
|
||||||
//! // Assignments require mutable contexts
|
//! // Assignments require mutable contexts
|
||||||
//! assert_eq!(eval_with_context("a = 6", &context), Err(EvalexprError::ContextNotManipulable));
|
//! assert_eq!(eval_with_context("a = 6", &context), Err(EvalexprError::ContextNotMutable));
|
||||||
//! // The HashMapContext is type safe
|
//! // The HashMapContext is type safe
|
||||||
//! assert_eq!(eval_with_context_mut("a = 5.5", &mut context),
|
//! assert_eq!(eval_with_context_mut("a = 5.5", &mut context),
|
||||||
//! Err(EvalexprError::ExpectedInt { actual: Value::from(5.5) }));
|
//! Err(EvalexprError::ExpectedInt { actual: Value::from(5.5) }));
|
||||||
@ -488,7 +488,10 @@ extern crate serde;
|
|||||||
extern crate serde_derive;
|
extern crate serde_derive;
|
||||||
|
|
||||||
pub use crate::{
|
pub use crate::{
|
||||||
context::{Context, EmptyContext, HashMapContext},
|
context::{
|
||||||
|
Context, ContextWithMutableFunctions, ContextWithMutableVariables, EmptyContext,
|
||||||
|
HashMapContext,
|
||||||
|
},
|
||||||
error::{EvalexprError, EvalexprResult},
|
error::{EvalexprError, EvalexprResult},
|
||||||
function::Function,
|
function::Function,
|
||||||
interface::*,
|
interface::*,
|
||||||
|
@ -1,6 +1,6 @@
|
|||||||
use crate::function::builtin::builtin_function;
|
use crate::function::builtin::builtin_function;
|
||||||
|
|
||||||
use crate::{context::Context, error::*, value::Value};
|
use crate::{context::Context, error::*, value::Value, ContextWithMutableVariables};
|
||||||
use std::borrow::Borrow;
|
use std::borrow::Borrow;
|
||||||
|
|
||||||
mod display;
|
mod display;
|
||||||
@ -169,7 +169,11 @@ impl Operator {
|
|||||||
}
|
}
|
||||||
|
|
||||||
/// Evaluates the operator with the given arguments and context.
|
/// Evaluates the operator with the given arguments and context.
|
||||||
pub(crate) fn eval(&self, arguments: &[Value], context: &dyn Context) -> EvalexprResult<Value> {
|
pub(crate) fn eval<C: Context>(
|
||||||
|
&self,
|
||||||
|
arguments: &[Value],
|
||||||
|
context: &C,
|
||||||
|
) -> EvalexprResult<Value> {
|
||||||
use crate::operator::Operator::*;
|
use crate::operator::Operator::*;
|
||||||
match self {
|
match self {
|
||||||
RootNode => {
|
RootNode => {
|
||||||
@ -408,7 +412,7 @@ impl Operator {
|
|||||||
Ok(Value::Boolean(!a))
|
Ok(Value::Boolean(!a))
|
||||||
},
|
},
|
||||||
Assign | AddAssign | SubAssign | MulAssign | DivAssign | ModAssign | ExpAssign
|
Assign | AddAssign | SubAssign | MulAssign | DivAssign | ModAssign | ExpAssign
|
||||||
| AndAssign | OrAssign => Err(EvalexprError::ContextNotManipulable),
|
| AndAssign | OrAssign => Err(EvalexprError::ContextNotMutable),
|
||||||
Tuple => Ok(Value::Tuple(arguments.into())),
|
Tuple => Ok(Value::Tuple(arguments.into())),
|
||||||
Chain => {
|
Chain => {
|
||||||
if arguments.is_empty() {
|
if arguments.is_empty() {
|
||||||
@ -437,9 +441,9 @@ impl Operator {
|
|||||||
expect_operator_argument_amount(arguments.len(), 1)?;
|
expect_operator_argument_amount(arguments.len(), 1)?;
|
||||||
let arguments = &arguments[0];
|
let arguments = &arguments[0];
|
||||||
|
|
||||||
if let Some(function) = context.get_function(&identifier) {
|
match context.call_function(&identifier, arguments) {
|
||||||
function.call(arguments)
|
Err(EvalexprError::FunctionIdentifierNotFound(_)) => {
|
||||||
} else if let Some(builtin_function) = builtin_function(&identifier) {
|
if let Some(builtin_function) = builtin_function(&identifier) {
|
||||||
builtin_function.call(arguments)
|
builtin_function.call(arguments)
|
||||||
} else {
|
} else {
|
||||||
Err(EvalexprError::FunctionIdentifierNotFound(
|
Err(EvalexprError::FunctionIdentifierNotFound(
|
||||||
@ -447,14 +451,17 @@ impl Operator {
|
|||||||
))
|
))
|
||||||
}
|
}
|
||||||
},
|
},
|
||||||
|
result => result,
|
||||||
|
}
|
||||||
|
},
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
/// Evaluates the operator with the given arguments and mutable context.
|
/// Evaluates the operator with the given arguments and mutable context.
|
||||||
pub(crate) fn eval_mut(
|
pub(crate) fn eval_mut<C: ContextWithMutableVariables>(
|
||||||
&self,
|
&self,
|
||||||
arguments: &[Value],
|
arguments: &[Value],
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<Value> {
|
) -> EvalexprResult<Value> {
|
||||||
use crate::operator::Operator::*;
|
use crate::operator::Operator::*;
|
||||||
match self {
|
match self {
|
||||||
|
@ -1,11 +1,10 @@
|
|||||||
use crate::{
|
use crate::{
|
||||||
token::Token,
|
token::Token,
|
||||||
value::{TupleType, EMPTY_VALUE},
|
value::{TupleType, EMPTY_VALUE},
|
||||||
EmptyType, FloatType, HashMapContext, IntType,
|
Context, ContextWithMutableVariables, EmptyType, FloatType, HashMapContext, IntType,
|
||||||
};
|
};
|
||||||
|
|
||||||
use crate::{
|
use crate::{
|
||||||
context::Context,
|
|
||||||
error::{EvalexprError, EvalexprResult},
|
error::{EvalexprError, EvalexprResult},
|
||||||
operator::*,
|
operator::*,
|
||||||
value::Value,
|
value::Value,
|
||||||
@ -119,7 +118,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node with the given context.
|
/// Evaluates the operator tree rooted at this node with the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_with_context(&self, context: &dyn Context) -> EvalexprResult<Value> {
|
pub fn eval_with_context<C: Context>(&self, context: &C) -> EvalexprResult<Value> {
|
||||||
let mut arguments = Vec::new();
|
let mut arguments = Vec::new();
|
||||||
for child in self.children() {
|
for child in self.children() {
|
||||||
arguments.push(child.eval_with_context(context)?);
|
arguments.push(child.eval_with_context(context)?);
|
||||||
@ -130,7 +129,10 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node with the given mutable context.
|
/// Evaluates the operator tree rooted at this node with the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_with_context_mut(&self, context: &mut dyn Context) -> EvalexprResult<Value> {
|
pub fn eval_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
|
&self,
|
||||||
|
context: &mut C,
|
||||||
|
) -> EvalexprResult<Value> {
|
||||||
let mut arguments = Vec::new();
|
let mut arguments = Vec::new();
|
||||||
for child in self.children() {
|
for child in self.children() {
|
||||||
arguments.push(child.eval_with_context_mut(context)?);
|
arguments.push(child.eval_with_context_mut(context)?);
|
||||||
@ -148,7 +150,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a string with an the given context.
|
/// Evaluates the operator tree rooted at this node into a string with an the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_string_with_context(&self, context: &dyn Context) -> EvalexprResult<String> {
|
pub fn eval_string_with_context<C: Context>(&self, context: &C) -> EvalexprResult<String> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::String(string)) => Ok(string),
|
Ok(Value::String(string)) => Ok(string),
|
||||||
Ok(value) => Err(EvalexprError::expected_string(value)),
|
Ok(value) => Err(EvalexprError::expected_string(value)),
|
||||||
@ -159,7 +161,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a float with an the given context.
|
/// Evaluates the operator tree rooted at this node into a float with an the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_float_with_context(&self, context: &dyn Context) -> EvalexprResult<FloatType> {
|
pub fn eval_float_with_context<C: Context>(&self, context: &C) -> EvalexprResult<FloatType> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::Float(float)) => Ok(float),
|
Ok(Value::Float(float)) => Ok(float),
|
||||||
Ok(value) => Err(EvalexprError::expected_float(value)),
|
Ok(value) => Err(EvalexprError::expected_float(value)),
|
||||||
@ -170,7 +172,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into an integer with an the given context.
|
/// Evaluates the operator tree rooted at this node into an integer with an the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_int_with_context(&self, context: &dyn Context) -> EvalexprResult<IntType> {
|
pub fn eval_int_with_context<C: Context>(&self, context: &C) -> EvalexprResult<IntType> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::Int(int)) => Ok(int),
|
Ok(Value::Int(int)) => Ok(int),
|
||||||
Ok(value) => Err(EvalexprError::expected_int(value)),
|
Ok(value) => Err(EvalexprError::expected_int(value)),
|
||||||
@ -182,7 +184,7 @@ impl Node {
|
|||||||
/// If the result of the expression is an integer, it is silently converted into a float.
|
/// If the result of the expression is an integer, it is silently converted into a float.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_number_with_context(&self, context: &dyn Context) -> EvalexprResult<FloatType> {
|
pub fn eval_number_with_context<C: Context>(&self, context: &C) -> EvalexprResult<FloatType> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::Int(int)) => Ok(int as FloatType),
|
Ok(Value::Int(int)) => Ok(int as FloatType),
|
||||||
Ok(Value::Float(float)) => Ok(float),
|
Ok(Value::Float(float)) => Ok(float),
|
||||||
@ -194,7 +196,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a boolean with an the given context.
|
/// Evaluates the operator tree rooted at this node into a boolean with an the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_boolean_with_context(&self, context: &dyn Context) -> EvalexprResult<bool> {
|
pub fn eval_boolean_with_context<C: Context>(&self, context: &C) -> EvalexprResult<bool> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::Boolean(boolean)) => Ok(boolean),
|
Ok(Value::Boolean(boolean)) => Ok(boolean),
|
||||||
Ok(value) => Err(EvalexprError::expected_boolean(value)),
|
Ok(value) => Err(EvalexprError::expected_boolean(value)),
|
||||||
@ -205,7 +207,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a tuple with an the given context.
|
/// Evaluates the operator tree rooted at this node into a tuple with an the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_tuple_with_context(&self, context: &dyn Context) -> EvalexprResult<TupleType> {
|
pub fn eval_tuple_with_context<C: Context>(&self, context: &C) -> EvalexprResult<TupleType> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::Tuple(tuple)) => Ok(tuple),
|
Ok(Value::Tuple(tuple)) => Ok(tuple),
|
||||||
Ok(value) => Err(EvalexprError::expected_tuple(value)),
|
Ok(value) => Err(EvalexprError::expected_tuple(value)),
|
||||||
@ -216,7 +218,7 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into an empty value with an the given context.
|
/// Evaluates the operator tree rooted at this node into an empty value with an the given context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_empty_with_context(&self, context: &dyn Context) -> EvalexprResult<EmptyType> {
|
pub fn eval_empty_with_context<C: Context>(&self, context: &C) -> EvalexprResult<EmptyType> {
|
||||||
match self.eval_with_context(context) {
|
match self.eval_with_context(context) {
|
||||||
Ok(Value::Empty) => Ok(EMPTY_VALUE),
|
Ok(Value::Empty) => Ok(EMPTY_VALUE),
|
||||||
Ok(value) => Err(EvalexprError::expected_empty(value)),
|
Ok(value) => Err(EvalexprError::expected_empty(value)),
|
||||||
@ -227,9 +229,9 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a string with an the given mutable context.
|
/// Evaluates the operator tree rooted at this node into a string with an the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_string_with_context_mut(
|
pub fn eval_string_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
&self,
|
&self,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<String> {
|
) -> EvalexprResult<String> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::String(string)) => Ok(string),
|
Ok(Value::String(string)) => Ok(string),
|
||||||
@ -241,9 +243,9 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a float with an the given mutable context.
|
/// Evaluates the operator tree rooted at this node into a float with an the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_float_with_context_mut(
|
pub fn eval_float_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
&self,
|
&self,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<FloatType> {
|
) -> EvalexprResult<FloatType> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::Float(float)) => Ok(float),
|
Ok(Value::Float(float)) => Ok(float),
|
||||||
@ -255,7 +257,10 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into an integer with an the given mutable context.
|
/// Evaluates the operator tree rooted at this node into an integer with an the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_int_with_context_mut(&self, context: &mut dyn Context) -> EvalexprResult<IntType> {
|
pub fn eval_int_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
|
&self,
|
||||||
|
context: &mut C,
|
||||||
|
) -> EvalexprResult<IntType> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::Int(int)) => Ok(int),
|
Ok(Value::Int(int)) => Ok(int),
|
||||||
Ok(value) => Err(EvalexprError::expected_int(value)),
|
Ok(value) => Err(EvalexprError::expected_int(value)),
|
||||||
@ -267,9 +272,9 @@ impl Node {
|
|||||||
/// If the result of the expression is an integer, it is silently converted into a float.
|
/// If the result of the expression is an integer, it is silently converted into a float.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_number_with_context_mut(
|
pub fn eval_number_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
&self,
|
&self,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<FloatType> {
|
) -> EvalexprResult<FloatType> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::Int(int)) => Ok(int as FloatType),
|
Ok(Value::Int(int)) => Ok(int as FloatType),
|
||||||
@ -282,7 +287,10 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a boolean with an the given mutable context.
|
/// Evaluates the operator tree rooted at this node into a boolean with an the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_boolean_with_context_mut(&self, context: &mut dyn Context) -> EvalexprResult<bool> {
|
pub fn eval_boolean_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
|
&self,
|
||||||
|
context: &mut C,
|
||||||
|
) -> EvalexprResult<bool> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::Boolean(boolean)) => Ok(boolean),
|
Ok(Value::Boolean(boolean)) => Ok(boolean),
|
||||||
Ok(value) => Err(EvalexprError::expected_boolean(value)),
|
Ok(value) => Err(EvalexprError::expected_boolean(value)),
|
||||||
@ -293,9 +301,9 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into a tuple with an the given mutable context.
|
/// Evaluates the operator tree rooted at this node into a tuple with an the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_tuple_with_context_mut(
|
pub fn eval_tuple_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
&self,
|
&self,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<TupleType> {
|
) -> EvalexprResult<TupleType> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::Tuple(tuple)) => Ok(tuple),
|
Ok(Value::Tuple(tuple)) => Ok(tuple),
|
||||||
@ -307,9 +315,9 @@ impl Node {
|
|||||||
/// Evaluates the operator tree rooted at this node into an empty value with an the given mutable context.
|
/// Evaluates the operator tree rooted at this node into an empty value with an the given mutable context.
|
||||||
///
|
///
|
||||||
/// Fails, if one of the operators in the expression tree fails.
|
/// Fails, if one of the operators in the expression tree fails.
|
||||||
pub fn eval_empty_with_context_mut(
|
pub fn eval_empty_with_context_mut<C: ContextWithMutableVariables>(
|
||||||
&self,
|
&self,
|
||||||
context: &mut dyn Context,
|
context: &mut C,
|
||||||
) -> EvalexprResult<EmptyType> {
|
) -> EvalexprResult<EmptyType> {
|
||||||
match self.eval_with_context_mut(context) {
|
match self.eval_with_context_mut(context) {
|
||||||
Ok(Value::Empty) => Ok(EMPTY_VALUE),
|
Ok(Value::Empty) => Ok(EMPTY_VALUE),
|
||||||
|
Loading…
Reference in New Issue
Block a user