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#!/usr/bin/env node --experimental-strip-types
function typArgs(a: string[]): string {
if (a.length == 0) return ""
return "<" + a.join(", ") + ">"
}
function argFor(va: string): string {
return va.replace("T", "arg")
}
/* public static <T1, T2, O, Format> JsonCodec<O, Format> join(
RecordCodec<O, T1, Format> arg1,
RecordCodec<O, T2, Format> arg2,
Tuple.Func2<O, T1, T2> joiner
) {
return new RecordCompleteCodec<>() {
@Override
public Result<Format, JsonLikeError> encode(O data, JsonLikeOperations<Format> ops) {
return Stream.of(arg1.enc(data, ops), arg2.enc(data, ops))
.reduce(Result.ok(ops.createObject()), RecordCodec::merge)
.map(RecordBuilder::complete);
}
@Override
public Result<O, JsonLikeError> decode(RecordView<Format> format, JsonLikeOperations<Format> ops) {
return Tuple.Tuple2.collect(new Tuple.Tuple2<>(arg1, arg2)
.map(it -> it.dec(format, ops), it -> it.dec(format, ops)))
.map(it -> it.applyTo(joiner));
}
};
}
*/
function genRecordJoiner(elements: number) {
if (!elements) return
const vars = [...new Array(elements)].map((_, idx) => "T" + idx)
console.log(`\tpublic static ${typArgs([...vars, 'O', 'Format'])} MapCodec<O, Format> join(`)
for (let var1 of vars) {
console.log(`\t\tRecordCodec<O, ${var1}, Format> ${argFor(var1)},`)
}
console.log(`\t\tTuple.Func${elements}${typArgs(['O', ...vars])} joiner`)
console.log("\t) {")
console.log("\t\treturn new MapCodec<>() {")
console.log("\t\t\t@Override")
console.log("\t\t\tpublic Result<RecordBuilder<Format>, JsonLikeError> encode(O data, JsonLikeOperations<Format> ops) {")
console.log(`\t\t\t\treturn Stream.of(${vars.map(it => argFor(it) + ".enc(data, ops)").join(", ")})`)
console.log(`\t\t\t\t\t.reduce(Result.ok(ops.createObject()), RecordCodec::merge);`)
console.log("\t\t\t}")
console.log("\t\t\t@Override")
console.log("\t\t\tpublic Result<O, JsonLikeError> decode(RecordView<Format> format, JsonLikeOperations<Format> ops) {")
console.log(`\t\t\t\treturn Tuple.Tuple${elements}.collect(new Tuple.Tuple${elements}${elements ? '<>' : ''}(${vars.map(it => argFor(it) + ".dec(format, ops)").join(", ")}))`)
console.log("\t\t\t\t\t.map(it -> it.applyTo(joiner));")
console.log("\t\t\t}")
console.log("\t\t};")
console.log("\t}")
}
function genRecords(maxI: number) {
console.log("// @gen" + "erated by genrecord.ts")
console.log("package moe.nea.pcj.json;")
console.log(`
import moe.nea.pcj.*;
import java.util.stream.*;`)
console.log()
console.log("@SuppressWarnings(\"unused\")")
console.log("public class RecordJoiners {")
for (let i = 0; i < maxI; i++) {
genRecordJoiner(i)
}
console.log("}")
}
genRecords(15)
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