38 lines
921 B
Java
38 lines
921 B
Java
package lox;
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import java.util.List;
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class LoxFunction implements LoxCallable {
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private final Stmt.Function declaration;
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private final Environment closure;
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LoxFunction(Stmt.Function declaration, Environment closure) {
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this.closure = closure;
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this.declaration = declaration;
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}
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@Override
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public Object call(Interpreter interpreter, List<Object> arguments) {
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Environment environment = new Environment(closure);
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for (int i = 0; i < declaration.params.size(); i++) {
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environment.define(declaration.params.get(i).lexeme, arguments.get(i));
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}
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try {
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interpreter.executeBlock(declaration.body, environment);
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} catch (Return returnValue) {
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return returnValue.value;
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}
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return null;
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}
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@Override
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public int arity() {
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return declaration.params.size();
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}
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@Override
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public String toString() {
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return "<fn " + declaration.name.lexeme + ">";
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}
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}
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