Rename schala-lib -> schala-repl

schala-repl/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "schala-repl"
+version = "0.1.0"
+authors = ["greg <greg.shuflin@protonmail.com>"]
+
+[dependencies]
+llvm-sys = "*"
+take_mut = "0.1.3"
+itertools = "0.5.8"
+getopts = "*"
+lazy_static = "0.2.8"
+maplit = "*"
+colored = "1.5"
+serde = "1.0.15"
+serde_derive = "1.0.15"
+serde_json = "1.0.3"
+rocket = "0.3.5"
+rocket_codegen = "0.3.5"
+rocket_contrib = "0.3.5"
+phf = "0.7.12"
+includedir = "0.2.0"
+rustyline = "1.0.0"
+
+[build-dependencies]
+includedir_codegen = "0.2.0"

schala-repl/build.rs

@@ -0,0 +1,10 @@
+extern crate includedir_codegen;
+
+use includedir_codegen::Compression;
+
+fn main() {
+    includedir_codegen::start("WEBFILES")
+        .dir("../static", Compression::Gzip)
+        .build("static.rs")
+        .unwrap();
+}

schala-repl/src/language.rs

@@ -0,0 +1,155 @@
+extern crate colored;
+
+use std::collections::HashMap;
+use self::colored::*;
+
+pub struct LLVMCodeString(pub String);
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct EvalOptions {
+  pub debug: DebugOptions,
+  pub execution_method: ExecutionMethod
+}
+#[derive(Debug, Serialize, Deserialize)]
+pub enum ExecutionMethod {
+  Compile,
+  Interpret,
+}
+impl Default for ExecutionMethod {
+  fn default() -> ExecutionMethod {
+    ExecutionMethod::Interpret
+  }
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct DebugOptions {
+  pub tokens: bool,
+  pub parse_tree: bool,
+  pub ast: bool,
+  pub type_checking: bool,
+  pub symbol_table: bool,
+  pub evaluation: bool,
+  pub llvm_ir: bool,
+}
+
+#[derive(Debug, Default)]
+pub struct LanguageOutput {
+  output: String,
+  artifacts: Vec<TraceArtifact>,
+  pub failed: bool,
+}
+
+impl LanguageOutput {
+  pub fn add_artifact(&mut self, artifact: TraceArtifact) {
+    self.artifacts.push(artifact);
+  }
+  pub fn add_output(&mut self, output: String) {
+    self.output = output;
+  }
+
+  pub fn to_string(&self) -> String {
+    let mut acc = String::new();
+    for line in self.artifacts.iter() {
+      acc.push_str(&line.debug_output.color(line.text_color).to_string());
+      acc.push_str(&"\n");
+    }
+    acc.push_str(&self.output);
+    acc
+  }
+
+  pub fn print_to_screen(&self) {
+    for line in self.artifacts.iter() {
+      let color = line.text_color;
+      let stage = line.stage_name.color(color).to_string();
+      let output = line.debug_output.color(color).to_string();
+      println!("{}: {}", stage, output);
+    }
+    println!("{}", self.output);
+  }
+}
+
+#[derive(Debug, Default)]
+pub struct UnfinishedComputation {
+  artifacts: HashMap<String, TraceArtifact>,
+}
+
+#[derive(Debug)]
+pub struct FinishedComputation {
+  artifacts: HashMap<String, TraceArtifact>,
+  text_output: Result<String, String>,
+}
+
+impl UnfinishedComputation {
+  pub fn add_artifact(&mut self, artifact: TraceArtifact) {
+    self.artifacts.insert(artifact.stage_name.clone(), artifact);
+  }
+  pub fn output(self, output: Result<String, String>) -> FinishedComputation {
+    FinishedComputation {
+      artifacts: self.artifacts,
+      text_output: output
+    }
+  }
+}
+
+impl FinishedComputation {
+  pub fn to_repl(&self) -> String {
+    match self.text_output {
+      Ok(ref s) => s.clone(),
+      Err(ref s) => format!("Error: {}", s)
+    }
+  }
+  pub fn to_noninteractive(&self) -> Option<String> {
+    match self.text_output {
+      Ok(ref s) => None,
+      Err(ref s) => Some(format!("Error: {}", s)),
+    }
+  }
+}
+
+#[derive(Debug)]
+pub struct TraceArtifact {
+  stage_name: String,
+  debug_output: String,
+  text_color: &'static str,
+}
+
+impl TraceArtifact {
+  pub fn new(stage: &str, debug: String) -> TraceArtifact {
+    let color = match stage {
+      "parse_trace"  | "ast" => "red",
+      "tokens" => "green",
+      "type_check" => "magenta",
+      _ => "blue",
+    };
+    TraceArtifact { stage_name: stage.to_string(), debug_output: debug, text_color: color}
+  }
+
+  pub fn new_parse_trace(trace: Vec<String>) -> TraceArtifact {
+    let mut output = String::new();
+
+    for t in trace {
+      output.push_str(&t);
+      output.push_str("\n");
+    }
+
+    TraceArtifact { stage_name: "parse_trace".to_string(), debug_output: output, text_color: "red"}
+  }
+}
+
+pub trait ProgrammingLanguageInterface {
+  /* old */
+  fn evaluate_in_repl(&mut self, input: &str, eval_options: &EvalOptions) -> LanguageOutput {
+    LanguageOutput { output: format!("Defunct"), artifacts: vec![], failed: false }
+  }
+  fn evaluate_noninteractive(&mut self, input: &str, eval_options: &EvalOptions) -> LanguageOutput {
+    self.evaluate_in_repl(input, eval_options)
+  }
+  /* old */
+
+
+  fn execute(&mut self, input: &str, eval_options: &EvalOptions) -> FinishedComputation {
+    FinishedComputation { artifacts: HashMap::new(), text_output: Err(format!("REPL evaluation not implemented")) }
+  }
+  fn get_language_name(&self) -> String;
+  fn get_source_file_suffix(&self) -> String;
+}

schala-repl/src/lib.rs

@@ -0,0 +1,378 @@
+#![feature(link_args)]
+#![feature(advanced_slice_patterns, slice_patterns, box_patterns, box_syntax)]
+#![feature(plugin)]
+#![plugin(rocket_codegen)]
+extern crate getopts;
+extern crate rustyline;
+extern crate itertools;
+
+#[macro_use]
+extern crate lazy_static;
+#[macro_use]
+extern crate maplit;
+#[macro_use]
+extern crate serde_derive;
+extern crate serde_json;
+extern crate rocket;
+extern crate rocket_contrib;
+extern crate includedir;
+extern crate phf;
+
+use std::path::Path;
+use std::fs::File;
+use std::io::{Read, Write};
+use std::process::exit;
+use std::default::Default;
+
+use rustyline::error::ReadlineError;
+use rustyline::Editor;
+
+mod language;
+mod webapp;
+pub mod llvm_wrap;
+
+include!(concat!(env!("OUT_DIR"), "/static.rs"));
+
+pub use language::{LLVMCodeString, ProgrammingLanguageInterface, EvalOptions, ExecutionMethod, TraceArtifact, LanguageOutput, FinishedComputation, UnfinishedComputation};
+pub type PLIGenerator = Box<Fn() -> Box<ProgrammingLanguageInterface> + Send + Sync>;
+
+pub fn schala_main(generators: Vec<PLIGenerator>) {
+  let languages: Vec<Box<ProgrammingLanguageInterface>> = generators.iter().map(|x| x()).collect();
+
+  let option_matches = program_options().parse(std::env::args()).unwrap_or_else(|e| {
+    println!("{:?}", e);
+    exit(1);
+  });
+
+  if option_matches.opt_present("list-languages") {
+    for lang in languages {
+      println!("{}", lang.get_language_name());
+    }
+    exit(1);
+  }
+
+  if option_matches.opt_present("help") {
+    println!("{}", program_options().usage("Schala metainterpreter"));
+    exit(0);
+  }
+
+  if option_matches.opt_present("webapp") {
+    webapp::web_main(generators);
+    exit(0);
+  }
+
+  let language_names: Vec<String> = languages.iter().map(|lang| {lang.get_language_name()}).collect();
+  let initial_index: usize =
+    option_matches.opt_str("lang")
+    .and_then(|lang| { language_names.iter().position(|x| { x.to_lowercase() == lang.to_lowercase() }) })
+    .unwrap_or(0);
+
+  let mut options = EvalOptions::default();
+  options.execution_method = match option_matches.opt_str("eval-style") {
+    Some(ref s) if s == "compile" => ExecutionMethod::Compile,
+    _ => ExecutionMethod::Interpret,
+  };
+
+  match option_matches.free[..] {
+    [] | [_] => {
+      let mut repl = Repl::new(languages, initial_index);
+      repl.run();
+    }
+    [_, ref filename, _..] => {
+
+      run_noninteractive(filename, languages, options);
+    }
+  };
+}
+
+fn run_noninteractive(filename: &str, languages: Vec<Box<ProgrammingLanguageInterface>>, options: EvalOptions) {
+  let path = Path::new(filename);
+  let ext = path.extension().and_then(|e| e.to_str()).unwrap_or_else(|| {
+    println!("Source file lacks extension");
+    exit(1);
+  });
+  let mut language = Box::new(languages.into_iter().find(|lang| lang.get_source_file_suffix() == ext)
+    .unwrap_or_else(|| {
+      println!("Extension .{} not recognized", ext);
+      exit(1);
+    }));
+
+  let mut source_file = File::open(path).unwrap();
+  let mut buffer = String::new();
+
+  source_file.read_to_string(&mut buffer).unwrap();
+
+  match options.execution_method {
+    ExecutionMethod::Compile => {
+      /*
+      let llvm_bytecode = language.compile(&buffer);
+      compilation_sequence(llvm_bytecode, filename);
+      */
+      panic!("Not ready to go yet");
+    },
+    ExecutionMethod::Interpret => {
+      let output = language.execute(&buffer, &options);
+      output.to_noninteractive().map(|text| println!("{}", text));
+    }
+  }
+}
+
+struct Repl {
+  options: EvalOptions,
+  languages: Vec<Box<ProgrammingLanguageInterface>>,
+  current_language_index: usize,
+  interpreter_directive_sigil: char,
+  console: rustyline::Editor<()>,
+}
+
+impl Repl {
+  fn new(languages: Vec<Box<ProgrammingLanguageInterface>>, initial_index: usize) -> Repl {
+    let i = if initial_index < languages.len() { initial_index } else { 0 };
+
+    let console = Editor::<()>::new();
+
+    Repl {
+      options: Repl::get_options(),
+      languages: languages,
+      current_language_index: i,
+      interpreter_directive_sigil: '.',
+      console
+    }
+  }
+
+  fn get_options() -> EvalOptions {
+    File::open(".schala_repl")
+      .and_then(|mut file| {
+        let mut contents = String::new();
+        file.read_to_string(&mut contents)?;
+        Ok(contents)
+      })
+      .and_then(|contents| {
+        let options: EvalOptions = serde_json::from_str(&contents)?;
+        Ok(options)
+      }).unwrap_or(EvalOptions::default())
+  }
+
+  fn save_options(&self) {
+    let ref options = self.options;
+    let read = File::create(".schala_repl")
+      .and_then(|mut file| {
+        let buf = serde_json::to_string(options).unwrap();
+        file.write_all(buf.as_bytes())
+      });
+
+    if let Err(err) = read {
+      println!("Error saving .schala_repl file {}", err);
+    }
+  }
+
+  fn run(&mut self) {
+    println!("MetaInterpreter v 0.05");
+
+    self.console.get_history().load(".schala_history").unwrap_or(());
+
+    loop {
+      let language_name = self.languages[self.current_language_index].get_language_name();
+      let prompt_str = format!("{} >> ", language_name);
+
+      match self.console.readline(&prompt_str) {
+        Err(ReadlineError::Eof) | Err(ReadlineError::Interrupted) => break,
+        Err(e) => {
+          println!("Terminal read error: {}", e);
+        },
+        Ok(ref input) => {
+          self.console.add_history_entry(input);
+          if self.handle_interpreter_directive(input) {
+            continue;
+          }
+          let output = self.input_handler(input);
+          println!("=> {}", output);
+        }
+        _ => (),
+      }
+    }
+    self.console.get_history().save(".schala_history").unwrap_or(());
+    self.save_options();
+    println!("Exiting...");
+  }
+
+  fn input_handler(&mut self, input: &str) -> String {
+    let ref mut language = self.languages[self.current_language_index];
+    let interpreter_output = language.execute(input, &self.options);
+    interpreter_output.to_repl()
+  }
+
+  fn handle_interpreter_directive(&mut self, input: &str) -> bool {
+    match input.chars().nth(0) {
+      Some(ch) if ch == self.interpreter_directive_sigil => (),
+      _ => return false
+    }
+
+    let mut iter = input.chars();
+    iter.next();
+    let trimmed_sigil: &str = iter.as_str();
+
+    let commands: Vec<&str> = trimmed_sigil
+      .split_whitespace()
+      .collect();
+
+    let cmd: &str = match commands.get(0).clone() {
+      None => return true,
+      Some(s) => s
+    };
+
+    match cmd {
+      "exit" | "quit"  => {
+        self.save_options();
+        exit(0)
+      },
+      "help" => {
+        println!("Commands:");
+        println!("exit | quit");
+        println!("lang(uage) [go|show|next|previous]");
+        println!("set [show|hide] [tokens|parse|symbols|eval|llvm]");
+      }
+      "lang" | "language" => {
+        match commands.get(1) {
+          Some(&"show") => {
+            for (i, lang) in self.languages.iter().enumerate() {
+              if i == self.current_language_index {
+                println!("* {}", lang.get_language_name());
+              } else {
+                println!("{}", lang.get_language_name());
+              }
+            }
+          },
+          Some(&"go") => {
+            match commands.get(2) {
+              None => println!("Must specify a language name"),
+              Some(&desired_name) => {
+                for (i, _) in self.languages.iter().enumerate() {
+                  let lang_name = self.languages[i].get_language_name();
+                  if lang_name.to_lowercase() == desired_name.to_lowercase() {
+                    self.current_language_index = i;
+                    println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
+                    return true;
+                  }
+                }
+                println!("Language {} not found", desired_name);
+              }
+            }
+          },
+          Some(&"next") => {
+            self.current_language_index = (self.current_language_index + 1) % self.languages.len();
+            println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
+          }
+          Some(&"prev") | Some(&"previous") => {
+            self.current_language_index = if self.current_language_index == 0 { self.languages.len() - 1 } else { self.current_language_index - 1 };
+            println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
+          },
+          Some(e) => println!("Bad `lang` argument: {}", e),
+          None => println!("`lang` - valid arguments `show`, `next`, `prev`|`previous`"),
+        }
+      },
+      "set" => {
+        let show = match commands.get(1) {
+          Some(&"show") => true,
+          Some(&"hide") => false,
+          Some(e) => {
+            println!("Bad `set` argument: {}", e);
+            return true;
+          }
+          None => {
+            println!("`set` - valid arguments `show {{option}}`, `hide {{option}}`");
+            return true;
+          }
+        };
+        match commands.get(2) {
+          Some(&"tokens") => self.options.debug.tokens = show,
+          Some(&"parse") => self.options.debug.parse_tree = show,
+          Some(&"ast") => self.options.debug.ast = show,
+          Some(&"symbols") => self.options.debug.symbol_table = show,
+          Some(&"llvm") => self.options.debug.llvm_ir = show,
+          Some(e) => {
+            println!("Bad `show`/`hide` argument: {}", e);
+            return true;
+          }
+          None => {
+            println!("`show`/`hide` requires an argument");
+            return true;
+          }
+        }
+      },
+      e => println!("Unknown command: {}", e)
+    }
+    return true;
+  }
+}
+
+/*
+pub fn compilation_sequence(llvm_code: LLVMCodeString, sourcefile: &str) {
+    use std::process::Command;
+
+    let ll_filename = "out.ll";
+    let obj_filename = "out.o";
+    let q: Vec<&str> = sourcefile.split('.').collect();
+    let bin_filename = match &q[..] {
+        &[name, "maaru"] => name,
+        _ => panic!("Bad filename {}", sourcefile),
+    };
+
+    let LLVMCodeString(llvm_str) = llvm_code;
+
+    println!("Compilation process finished for {}", ll_filename);
+    File::create(ll_filename)
+        .and_then(|mut f| f.write_all(llvm_str.as_bytes()))
+        .expect("Error writing file");
+
+    let llc_output = Command::new("llc")
+        .args(&["-filetype=obj", ll_filename, "-o", obj_filename])
+        .output()
+        .expect("Failed to run llc");
+
+
+    if !llc_output.status.success() {
+        println!("{}", String::from_utf8_lossy(&llc_output.stderr));
+    }
+
+    let gcc_output = Command::new("gcc")
+        .args(&["-o", bin_filename, &obj_filename])
+        .output()
+        .expect("failed to run gcc");
+
+    if !gcc_output.status.success() {
+        println!("{}", String::from_utf8_lossy(&gcc_output.stdout));
+        println!("{}", String::from_utf8_lossy(&gcc_output.stderr));
+    }
+
+    for filename in [obj_filename].iter() {
+        Command::new("rm")
+            .arg(filename)
+            .output()
+            .expect(&format!("failed to run rm {}", filename));
+    }
+}
+*/
+
+fn program_options() -> getopts::Options {
+  let mut options = getopts::Options::new();
+  options.optopt("s",
+                 "eval-style",
+                 "Specify whether to compile (if supported) or interpret the language. If not specified, the default is language-specific",
+                 "[compile|interpret]"
+                 );
+  options.optflag("",
+                  "list-languages",
+                  "Show a list of all supported languages");
+  options.optopt("l",
+                 "lang",
+                 "Start up REPL in a language",
+                 "LANGUAGE");
+  options.optflag("h",
+                  "help",
+                  "Show help text");
+  options.optflag("w",
+                  "webapp",
+                  "Start up web interpreter");
+  options
+}

schala-repl/src/llvm_wrap.rs

@@ -0,0 +1,279 @@
+#![allow(non_snake_case)]
+#![allow(dead_code)]
+extern crate llvm_sys;
+
+use self::llvm_sys::{LLVMIntPredicate, LLVMRealPredicate};
+use self::llvm_sys::prelude::*;
+use self::llvm_sys::core;
+use std::ptr;
+use std::ffi::{CString, CStr};
+use std::os::raw::c_char;
+
+pub fn create_context() -> LLVMContextRef {
+    unsafe { core::LLVMContextCreate() }
+}
+pub fn module_create_with_name(name: &str) -> LLVMModuleRef {
+    unsafe {
+        let n = name.as_ptr() as *const _;
+        core::LLVMModuleCreateWithName(n)
+    }
+}
+pub fn CreateBuilderInContext(context: LLVMContextRef) -> LLVMBuilderRef {
+    unsafe { core::LLVMCreateBuilderInContext(context) }
+}
+
+pub fn AppendBasicBlockInContext(context: LLVMContextRef,
+                                 function: LLVMValueRef,
+                                 name: &str)
+                                 -> LLVMBasicBlockRef {
+    let c_name = CString::new(name).unwrap();
+    unsafe { core::LLVMAppendBasicBlockInContext(context, function, c_name.as_ptr()) }
+}
+
+pub fn AddFunction(module: LLVMModuleRef, name: &str, function_type: LLVMTypeRef) -> LLVMValueRef {
+    let c_name = CString::new(name).unwrap();
+    unsafe { core::LLVMAddFunction(module, c_name.as_ptr(), function_type) }
+}
+
+pub fn FunctionType(return_type: LLVMTypeRef,
+                    mut param_types: Vec<LLVMTypeRef>,
+                    is_var_rag: bool)
+                    -> LLVMTypeRef {
+    let len = param_types.len();
+    unsafe {
+        let pointer = param_types.as_mut_ptr();
+        core::LLVMFunctionType(return_type,
+                               pointer,
+                               len as u32,
+                               if is_var_rag { 1 } else { 0 })
+    }
+}
+
+pub fn GetNamedFunction(module: LLVMModuleRef,
+                        name: &str) -> Option<LLVMValueRef> {
+
+    let c_name = CString::new(name).unwrap();
+    let ret = unsafe { core::LLVMGetNamedFunction(module, c_name.as_ptr()) };
+
+    if ret.is_null() {
+        None
+    } else {
+        Some(ret)
+    }
+}
+
+pub fn VoidTypeInContext(context: LLVMContextRef) -> LLVMTypeRef {
+    unsafe { core::LLVMVoidTypeInContext(context) }
+}
+
+pub fn DisposeBuilder(builder: LLVMBuilderRef) {
+    unsafe { core::LLVMDisposeBuilder(builder) }
+}
+
+pub fn DisposeModule(module: LLVMModuleRef) {
+    unsafe { core::LLVMDisposeModule(module) }
+}
+
+pub fn ContextDispose(context: LLVMContextRef) {
+    unsafe { core::LLVMContextDispose(context) }
+}
+
+pub fn PositionBuilderAtEnd(builder: LLVMBuilderRef, basic_block: LLVMBasicBlockRef) {
+    unsafe { core::LLVMPositionBuilderAtEnd(builder, basic_block) }
+}
+
+pub fn BuildRet(builder: LLVMBuilderRef, val: LLVMValueRef) -> LLVMValueRef {
+    unsafe { core::LLVMBuildRet(builder, val) }
+}
+
+pub fn BuildRetVoid(builder: LLVMBuilderRef) -> LLVMValueRef {
+    unsafe { core::LLVMBuildRetVoid(builder) }
+}
+
+pub fn DumpModule(module: LLVMModuleRef) {
+    unsafe { core::LLVMDumpModule(module) }
+}
+
+pub fn Int64TypeInContext(context: LLVMContextRef) -> LLVMTypeRef {
+    unsafe { core::LLVMInt64TypeInContext(context) }
+}
+
+pub fn ConstInt(int_type: LLVMTypeRef, n: u64, sign_extend: bool) -> LLVMValueRef {
+    unsafe { core::LLVMConstInt(int_type, n, if sign_extend { 1 } else { 0 }) }
+}
+
+pub fn BuildAdd(builder: LLVMBuilderRef,
+                lhs: LLVMValueRef,
+                rhs: LLVMValueRef,
+                reg_name: &str)
+                -> LLVMValueRef {
+    let name = CString::new(reg_name).unwrap();
+    unsafe { core::LLVMBuildAdd(builder, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn BuildSub(builder: LLVMBuilderRef,
+                lhs: LLVMValueRef,
+                rhs: LLVMValueRef,
+                reg_name: &str)
+                -> LLVMValueRef {
+    let name = CString::new(reg_name).unwrap();
+    unsafe { core::LLVMBuildSub(builder, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn BuildMul(builder: LLVMBuilderRef,
+                lhs: LLVMValueRef,
+                rhs: LLVMValueRef,
+                reg_name: &str)
+                -> LLVMValueRef {
+    let name = CString::new(reg_name).unwrap();
+    unsafe { core::LLVMBuildMul(builder, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn BuildUDiv(builder: LLVMBuilderRef,
+                 lhs: LLVMValueRef,
+                 rhs: LLVMValueRef,
+                 reg_name: &str)
+                 -> LLVMValueRef {
+    let name = CString::new(reg_name).unwrap();
+    unsafe { core::LLVMBuildUDiv(builder, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn BuildSRem(builder: LLVMBuilderRef,
+                 lhs: LLVMValueRef,
+                 rhs: LLVMValueRef,
+                 reg_name: &str)
+                 -> LLVMValueRef {
+    let name = CString::new(reg_name).unwrap();
+    unsafe { core::LLVMBuildSRem(builder, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn BuildCondBr(builder: LLVMBuilderRef,
+                   if_expr: LLVMValueRef,
+                   then_expr: LLVMBasicBlockRef,
+                   else_expr: LLVMBasicBlockRef) -> LLVMValueRef {
+
+
+    unsafe { core::LLVMBuildCondBr(builder, if_expr, then_expr, else_expr) }
+}
+
+pub fn BuildBr(builder: LLVMBuilderRef,
+               dest: LLVMBasicBlockRef) -> LLVMValueRef {
+    unsafe { core::LLVMBuildBr(builder, dest) }
+}
+
+pub fn GetInsertBlock(builder: LLVMBuilderRef) -> LLVMBasicBlockRef {
+    unsafe { core::LLVMGetInsertBlock(builder) }
+}
+
+pub fn BuildPhi(builder: LLVMBuilderRef, ty: LLVMTypeRef, name: &str) -> LLVMValueRef {
+    let name = CString::new(name).unwrap();
+    unsafe { core::LLVMBuildPhi(builder, ty, name.as_ptr()) }
+}
+
+pub fn SetValueName(value: LLVMValueRef, name: &str) {
+    let name = CString::new(name).unwrap();
+    unsafe {
+        core::LLVMSetValueName(value, name.as_ptr())
+    }
+}
+
+pub fn GetValueName(value: LLVMValueRef) -> String {
+    unsafe { 
+        let name_ptr: *const c_char = core::LLVMGetValueName(value);
+        CStr::from_ptr(name_ptr).to_string_lossy().into_owned()
+    }
+}
+
+pub fn GetParams(function: LLVMValueRef) -> Vec<LLVMValueRef> {
+    let size = CountParams(function);
+    unsafe {
+        let mut container = Vec::with_capacity(size);
+        container.set_len(size);
+        core::LLVMGetParams(function, container.as_mut_ptr());
+        container
+    }
+}
+
+pub fn CountParams(function: LLVMValueRef) -> usize {
+    unsafe { core::LLVMCountParams(function) as usize }
+}
+
+pub fn BuildFCmp(builder: LLVMBuilderRef,
+                 op: LLVMRealPredicate,
+                 lhs: LLVMValueRef,
+                 rhs: LLVMValueRef,
+                 name: &str) -> LLVMValueRef {
+    let name = CString::new(name).unwrap();
+    unsafe { core::LLVMBuildFCmp(builder, op, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn BuildZExt(builder: LLVMBuilderRef,
+                       val: LLVMValueRef,
+                       dest_type: LLVMTypeRef,
+                       name: &str) -> LLVMValueRef {
+    let name = CString::new(name).unwrap();
+    unsafe { core::LLVMBuildZExt(builder, val, dest_type, name.as_ptr()) }
+}
+
+pub fn BuildUIToFP(builder: LLVMBuilderRef,
+                       val: LLVMValueRef,
+                       dest_type: LLVMTypeRef,
+                       name: &str) -> LLVMValueRef {
+
+    let name = CString::new(name).unwrap();
+    unsafe { core::LLVMBuildUIToFP(builder, val, dest_type, name.as_ptr()) }
+}
+
+pub fn BuildICmp(builder: LLVMBuilderRef,
+                 op: LLVMIntPredicate,
+                 lhs: LLVMValueRef,
+                 rhs: LLVMValueRef,
+                 name: &str) -> LLVMValueRef {
+    let name = CString::new(name).unwrap();
+    unsafe { core::LLVMBuildICmp(builder, op, lhs, rhs, name.as_ptr()) }
+}
+
+pub fn GetBasicBlockParent(block: LLVMBasicBlockRef) -> LLVMValueRef {
+    unsafe { core::LLVMGetBasicBlockParent(block) }
+}
+
+pub fn GetBasicBlocks(function: LLVMValueRef) -> Vec<LLVMBasicBlockRef> {
+    let size = CountBasicBlocks(function);
+    unsafe { 
+        let mut container = Vec::with_capacity(size);
+        container.set_len(size);
+        core::LLVMGetBasicBlocks(function, container.as_mut_ptr());
+        container
+    }
+}
+
+pub fn CountBasicBlocks(function: LLVMValueRef) -> usize {
+    unsafe { core::LLVMCountBasicBlocks(function) as usize }
+}
+
+pub fn PrintModuleToString(module: LLVMModuleRef) -> String {
+    unsafe {
+        let str_ptr: *const c_char = core::LLVMPrintModuleToString(module);
+        CStr::from_ptr(str_ptr).to_string_lossy().into_owned()
+    }
+}
+
+pub fn AddIncoming(phi_node: LLVMValueRef, mut incoming_values: Vec<LLVMValueRef>,
+                   mut incoming_blocks: Vec<LLVMBasicBlockRef>) {
+
+    let count = incoming_blocks.len() as u32;
+    if incoming_values.len() as u32 != count {
+        panic!("Bad invocation of AddIncoming");
+    }
+
+    unsafe {
+        let vals = incoming_values.as_mut_ptr();
+        let blocks = incoming_blocks.as_mut_ptr();
+        core::LLVMAddIncoming(phi_node, vals, blocks, count)
+    }
+}
+
+pub fn PrintModuleToFile(module: LLVMModuleRef, filename: &str) -> LLVMBool {
+    let out_file = CString::new(filename).unwrap();
+    unsafe { core::LLVMPrintModuleToFile(module, out_file.as_ptr(), ptr::null_mut()) }
+}

schala-repl/src/webapp.rs

@@ -0,0 +1,45 @@
+use rocket;
+use rocket::State;
+use rocket::response::Content;
+use rocket::response::NamedFile;
+use rocket::http::ContentType;
+use rocket_contrib::Json;
+use language::{ProgrammingLanguageInterface, EvalOptions};
+use WEBFILES;
+use ::PLIGenerator;
+
+#[get("/")]
+fn index() -> Content<String> {
+  let path = "static/index.html";
+  let html_contents = String::from_utf8(WEBFILES.get(path).unwrap().into_owned()).unwrap();
+  Content(ContentType::HTML, html_contents)
+}
+
+#[get("/bundle.js")]
+fn js_bundle() -> Content<String> {
+  let path = "static/bundle.js";
+  let js_contents = String::from_utf8(WEBFILES.get(path).unwrap().into_owned()).unwrap();
+  Content(ContentType::JavaScript, js_contents)
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct Input {
+  source: String,
+}
+
+#[derive(Serialize, Deserialize)]
+struct Output {
+  text: String,
+}
+
+#[post("/input", format = "application/json", data = "<input>")]
+fn interpreter_input(input: Json<Input>, generators: State<Vec<PLIGenerator>>) -> Json<Output> {
+  let schala_gen = generators.get(0).unwrap();
+  let mut schala: Box<ProgrammingLanguageInterface> = schala_gen();
+  let code_output = schala.evaluate_in_repl(&input.source, &EvalOptions::default());
+  Json(Output { text: code_output.to_string() })
+}
+
+pub fn web_main(language_generators: Vec<PLIGenerator>) {
+  rocket::ignite().manage(language_generators).mount("/", routes![index, js_bundle, interpreter_input]).launch();
+}