Functions 10
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4 changed files with 20 additions and 2 deletions
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@ -106,7 +106,7 @@ class Interpreter : Stmt.Visitor!void, Expr.Visitor!TValue {
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evaluate(stmt.expression);
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}
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void visit(Stmt.Function stmt){
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LoxFunction func = new LoxFunction(stmt);
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LoxFunction func = new LoxFunction(stmt, environment);
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environment.define(stmt.name.lexeme, TValue.cal(func));
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}
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void visit(Stmt.If stmt){
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@ -10,11 +10,15 @@ import jlox.util;
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class LoxFunction : LoxCallable{
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private Stmt.Function declaration;
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private Environment closure;
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mixin defaultCtor;
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invariant{
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assert(declaration && closure);
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}
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int arity() => declaration.params.length.to!int;
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TValue call(Interpreter interpreter, TValue[] arguments){
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Environment environment = new Environment(interpreter.globals);
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Environment environment = new Environment(closure);
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foreach(i; 0 .. declaration.params.length)
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environment.define(declaration.params[i].lexeme, arguments[i]);
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try{
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