Fixes and tests passed

utils/mergesymbols.js

@@ -0,0 +1,51 @@
+const fs = require("fs");
+
+const argv = require("yargs")
+    .usage("mergesymbols -i [input_file] -o [output_file] -s [symbols file]")
+    .alias("i", "input")
+    .alias("o", "output")
+    .alias("s", "symbols")
+    .help("h")
+    .epilogue(`Copyright (C) 2018  0kims association
+    This program comes with ABSOLUTELY NO WARRANTY;
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; see the COPYING file in the official
+    repo directory at  https://github.com/iden3/circom `)
+    .demandOption(["i","o","s"])
+    .argv;
+
+const inFileName = argv.input;
+const outFile = argv.output;
+const symbolsFile = argv.symbols;
+
+let symbols;
+
+async function loadSymbols() {
+    symbols = {};
+    const symsStr = await fs.promises.readFile(symbolsFile,"utf8");
+    const lines = symsStr.split("\n");
+    for (let i=0; i<lines.length; i++) {
+        const arr = lines[i].split(",");
+        if (arr.length!=3) continue;
+        symbols[arr[0]] = arr[2];
+    }
+}
+
+
+async function run() {
+    const outLines = [];
+    await loadSymbols();
+    const inStr = await fs.promises.readFile(inFileName,"utf8");
+    const lines = inStr.split("\n");
+    for (let i=0; i<lines.length; i++) {
+        const arr = lines[i].split(" --> ");
+        if (arr.length!=2) continue;
+        outLines.push(symbols[arr[0]] + " --> " + arr[1]);
+    }
+    await fs.promises.writeFile(outFile,outLines.join("\n"), "utf8");
+}
+
+
+run().then(() => {
+    process.exit(0);
+});