mirror of https://github.com/DanilaFe/abacus
69 lines
2.2 KiB
Kotlin
69 lines
2.2 KiB
Kotlin
package org.nwapw.abacus.context
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import org.nwapw.abacus.number.NumberInterface
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import org.nwapw.abacus.plugin.NumberImplementation
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import org.nwapw.abacus.tree.Reducer
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import org.nwapw.abacus.tree.nodes.TreeNode
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/**
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* A reduction context that is mutable.
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* @param parent the parent of this context.
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* @param numberImplementation the number implementation used in this context.
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* @param reducer the reducer used in this context
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*/
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class MutableEvaluationContext(parent: EvaluationContext? = null,
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numberImplementation: NumberImplementation? = null,
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reducer: Reducer<NumberInterface>? = null) :
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EvaluationContext(parent, numberImplementation, reducer) {
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override var numberImplementation: NumberImplementation? = super.numberImplementation
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override var reducer: Reducer<NumberInterface>? = super.reducer
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/**
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* Writes data stored in the [other] context over data stored in this one.
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* @param other the context from which to copy data.
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*/
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fun apply(other: EvaluationContext) {
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if(other.numberImplementation != null) numberImplementation = other.numberImplementation
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if(other.reducer != null) reducer = other.reducer
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for(name in other.variables) {
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setVariable(name, other.getVariable(name) ?: continue)
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}
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for(name in other.definitions) {
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setDefinition(name, other.getDefinition(name) ?: continue)
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}
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}
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/**
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* Sets a variable to a certain [value].
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* @param name the name of the variable.
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* @param value the value of the variable.
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*/
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fun setVariable(name: String, value: NumberInterface) {
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variableMap[name] = value
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}
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/**
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* Set a definition to a certain [value].
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* @param name the name of the definition.
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* @param value the value of the definition.
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*/
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fun setDefinition(name: String, value: TreeNode) {
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definitionMap[name] = value
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}
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/**
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* Clears the variables defined in this context.
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*/
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fun clearVariables(){
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variableMap.clear()
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}
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/**
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* Clears the definitions defined in this context.
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*/
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fun clearDefinitions(){
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definitionMap.clear()
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}
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} |