124 lines
3.8 KiB
Rust
124 lines
3.8 KiB
Rust
#![feature(slice_patterns, box_patterns, box_syntax)]
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#![feature(proc_macro)]
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extern crate itertools;
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#[macro_use]
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extern crate lazy_static;
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#[macro_use]
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extern crate maplit;
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#[macro_use]
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extern crate schala_repl;
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#[macro_use]
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extern crate schala_codegen;
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use itertools::Itertools;
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use schala_repl::{ProgrammingLanguageInterface, EvalOptions, TraceArtifact, UnfinishedComputation, FinishedComputation};
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macro_rules! bx {
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($e:expr) => { Box::new($e) }
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}
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mod util;
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mod builtin;
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mod tokenizing;
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mod parsing;
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mod typechecking;
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mod ast_reducing;
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mod eval;
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#[derive(ProgrammingLanguageInterface)]
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#[LanguageName = "Schala"]
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#[SourceFileExtension = "schala"]
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#[PipelineSteps(tokenizing, parsing, symbol_table, typechecking, ast_reducing, eval)]
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pub struct Schala {
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state: eval::State<'static>,
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type_context: typechecking::TypeContext
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}
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impl Schala {
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pub fn new() -> Schala {
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Schala {
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state: eval::State::new(),
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type_context: typechecking::TypeContext::new(),
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}
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}
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}
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fn tokenizing(_handle: &mut Schala, input: &str, comp: Option<&mut UnfinishedComputation>) -> Result<Vec<tokenizing::Token>, String> {
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let tokens = tokenizing::tokenize(input);
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comp.map(|comp| {
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let token_string = tokens.iter().map(|t| format!("{:?}<L:{},C:{}>", t.token_type, t.offset.0, t.offset.1)).join(", ");
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comp.add_artifact(TraceArtifact::new("tokens", token_string));
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});
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let errors: Vec<String> = tokens.iter().filter_map(|t| t.get_error()).collect();
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if errors.len() == 0 {
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Ok(tokens)
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} else {
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Err(format!("{:?}", errors))
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}
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}
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fn parsing(_handle: &mut Schala, input: Vec<tokenizing::Token>, comp: Option<&mut UnfinishedComputation>) -> Result<parsing::AST, parsing::ParseError> {
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let (ast, trace) = parsing::parse(input);
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comp.map(|comp| {
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//TODO need to control which of these debug stages get added
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comp.add_artifact(TraceArtifact::new_parse_trace(trace));
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comp.add_artifact(TraceArtifact::new("ast", format!("{:#?}", ast)));
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});
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ast
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}
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fn symbol_table(handle: &mut Schala, input: parsing::AST, comp: Option<&mut UnfinishedComputation>) -> Result<parsing::AST, String> {
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match handle.type_context.add_top_level_types(&input) {
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Ok(()) => {
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let artifact = TraceArtifact::new("symbol_table", handle.type_context.debug_symbol_table());
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comp.map(|comp| comp.add_artifact(artifact));
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Ok(input)
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},
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Err(msg) => Err(msg)
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}
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}
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fn typechecking(handle: &mut Schala, input: parsing::AST, comp: Option<&mut UnfinishedComputation>) -> Result<parsing::AST, String> {
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match handle.type_context.type_check_ast(&input) {
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Ok(ty) => {
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comp.map(|comp| comp.add_artifact(TraceArtifact::new("type_check", format!("{:?}", ty))));
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Ok(input)
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},
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Err(msg) => {
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comp.map(|comp| comp.add_artifact(TraceArtifact::new("type_check", format!("Type error: {:?}", msg))));
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Ok(input)
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}
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}
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}
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type TempASTReduction = (ast_reducing::ReducedAST, parsing::AST);
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fn ast_reducing(handle: &mut Schala, input: parsing::AST, comp: Option<&mut UnfinishedComputation>) -> Result<TempASTReduction, String> {
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let output = input.reduce()?;
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println!("REDUCED: {:?}", output);
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Ok((output, input))
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}
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fn eval(handle: &mut Schala, input: TempASTReduction, _comp: Option<&mut UnfinishedComputation>) -> Result<String, String> {
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let new_input = input.0;
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let new_eval_output = handle.state.evaluate_new(new_input);
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match new_eval_output[0] {
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Ok(ref s) => println!("NEW OUTPUT> {}", s),
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Err(ref e) => println!("NEW ERR> {}", e),
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}
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/* old-style eval */
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let input = input.1;
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let evaluation_outputs = handle.state.evaluate(input);
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let text_output: Result<Vec<String>, String> = evaluation_outputs
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.into_iter()
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.collect();
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let eval_output: Result<String, String> = text_output
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.map(|v| { v.into_iter().intersperse(format!("\n")).collect() });
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eval_output
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}
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