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40 lines
823 B
JavaScript
40 lines
823 B
JavaScript
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function Syntax(json, continuation) {
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if (json.indexed != null) {
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this.indexed = json.indexed.map(continuation);
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}
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if (json.fixed != null) {
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this.fixed = json.fixed.map(continuation);
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}
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if (json.keyed != null) {
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this.keyed = (new Dictionary(json.keyed)).map(continuation);
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}
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if (json.leaf != null) {
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this.leaf = json.leaf;
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}
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return this;
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}
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// forall a b. Syntax a -> (a -> b) -> Syntax b
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Syntax.prototype.map = function(transform) {
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if (this.leaf != null) {
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return new Syntax({
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leaf: this.leaf
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}, transform);
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}
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if (this.indexed != null) {
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return new Syntax({
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indexed: this.indexed
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}, transform);
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}
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if (this.fixed != null) {
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return new Syntax({
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fixed: this.fixed
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}, transform);
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}
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if (this.keyed != null) {
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return new Syntax({
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keyed: this.keyed.values
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}, transform);
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}
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}
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