1 files changed, 80 insertions, 0 deletions
diff --git a/genrecord.ts b/genrecord.ts
index e69de29..a700dc9 100644
--- a/genrecord.ts
+++ b/genrecord.ts
@@ -0,0 +1,80 @@
+#!/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'])} JsonCodec<O, Format> join(`)
+    for (let var1 of vars) {
+        console.log(`\t\tRecordCodec<O, ${var1}, Format> ${argFor(var1)},`)
+    }
+    console.log(`\t\tTuple.Func${elements}${typArgs(['O', ...vars])} joiner`)
+    console.log("\t) {")
+    console.log("\t\treturn new RecordCompleteCodec<>() {")
+
+    console.log("\t\t\t@Override")
+    console.log("\t\t\tpublic Result<Format, JsonLikeError> encode(O data, JsonLikeOperations<Format> ops) {")
+    console.log(`\t\t\t\treturn Stream.of(${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\t\t.map(RecordBuilder::complete);`)
+    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 moe.nea.pcj.json.RecordCodec.*;
+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)
+