44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
export default class ParseNode {
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toString(){
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throw new Meteor.Error('toString not implemented on ' + this.constructor.name);
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}
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compile(scope, context){
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// Returns a ParseNode, a ConstantNode if possible
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if(this.resolve) {
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return this.resolve('compile', scope, context);
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} else {
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throw new Meteor.Error('Compile not implemented on ' + this.constructor.name);
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}
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}
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// Compile, but turn rolls into arrays
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roll(scope, context){
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if (this.resolve){
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return this.resolve('roll', scope, context);
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} else {
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return this.compile(scope, context);
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}
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}
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// Compile, turn rolls into arrays, and reduce those arrays into single values
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reduce(scope, context){
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if (this.resolve){
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return this.resolve('reduce', scope, context);
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} else {
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return this.roll(scope, context);
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}
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}
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// If traverse isn't implemented, just apply it to the current node
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traverse(fn){
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fn(this);
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}
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// replace nodes, only replace nodes if fn returns a value
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replaceNodes(fn){
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let newNode = fn(this);
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if (newNode) {
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return newNode;
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} else {
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if (this.replaceChildren) this.replaceChildren(fn)
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return this;
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}
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}
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}
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