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/**
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* Copyright 2020 Garrit Franke
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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extern crate rust_embed;
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extern crate structopt;
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use crate::generator::Generator;
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use crate::Opt::Build;
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use std::fs::File;
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use std::io::Read;
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use std::io::Write;
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use std::path::PathBuf;
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use structopt::StructOpt;
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mod generator;
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mod lexer;
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mod parser;
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#[cfg(test)]
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mod tests;
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mod util;
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use rust_embed::RustEmbed;
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#[derive(RustEmbed)]
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#[folder = "lib/"]
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pub struct Lib;
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#[derive(RustEmbed)]
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#[folder = "builtin/"]
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pub struct Builtins;
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#[derive(StructOpt, Debug)]
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enum Opt {
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#[structopt()]
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Build {
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#[structopt(default_value = "./examples/playground.sb")]
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in_file: PathBuf,
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#[structopt(short, long, default_value = "./examples_out/playground.js")]
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out_file: PathBuf,
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},
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}
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fn main() -> Result<(), String> {
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let opts = Opt::from_args();
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let (in_file, out_file) = match opts {
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Build { in_file, out_file } => (in_file, out_file),
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};
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let mut file = File::open(in_file).expect("Could not open file");
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let mut contents = String::new();
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contents = append_stdlib(contents);
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file.read_to_string(&mut contents)
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.expect("Could not read file");
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let tokens = lexer::tokenize(&contents);
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let program = parser::parse(tokens, Some(contents))?;
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let output = generator::js::JsGenerator::generate(program);
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let mut file = std::fs::File::create(out_file).expect("create failed");
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file.write_all(output.as_bytes()).expect("write failed");
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file.flush().expect("Could not flush file");
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Ok(())
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}
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fn append_stdlib(mut buffer: String) -> String {
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buffer += "// START stdlib\n\n";
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let stdlib = Lib::get("stdio.sb").expect("Standard library not found. This should not occur.");
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buffer += std::str::from_utf8(&stdlib).expect("Could not interpret standard library.");
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buffer += "\n// END stdlib\n\n";
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buffer
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}
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