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87 lines
2.4 KiB
87 lines
2.4 KiB
/** |
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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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