39 lines
661 B
JavaScript
39 lines
661 B
JavaScript
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export class AST {
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eval(context) {
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}
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visit(visitor) {
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}
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}
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export class ImplicitReceiver extends AST {
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eval(context) {
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return context;
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}
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visit(visitor) {
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visitor.visitImplicitReceiver(this);
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}
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}
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export class FieldRead extends AST {
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constructor(receiver:AST, name:string, getter:Function) {
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this.receiver = receiver;
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this.name = name;
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this.getter = getter;
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}
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eval(context) {
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return this.getter(this.receiver.eval(context));
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}
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visit(visitor) {
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visitor.visitFieldRead(this);
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}
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}
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//INTERFACE
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export class AstVisitor {
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visitImplicitReceiver(ast:ImplicitReceiver) {}
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visitFieldRead(ast:FieldRead) {}
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}
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