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Swap over parser

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This commit is contained in:
Greg Shuflin 2021-11-14 02:43:48 -08:00
parent 205ab7179d
commit 4b0aced11f
2 changed files with 12 additions and 15 deletions
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4
schala-lang/language/source-files/prelude.schala
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@ -14,8 +14,8 @@ fn getline(arg) { }
fn map(input: Option<T>, func: Func): Option<T> {
if input {
is Option::Some(x) then Option::Some(func(x)),
is Option::None then Option::None,
is Option::Some(x) then Option::Some(func(x))
is Option::None then Option::None
}
}

23
schala-lang/language/src/schala.rs
View File

@ -19,7 +19,7 @@ pub struct Schala<'a> {
/// Contains information for type-checking
type_context: type_inference::TypeContext,
/// Schala Parser
active_parser: parsing::Parser,
active_parser: parsing::new::Parser,
/// Execution state for AST-walking interpreter
eval_state: tree_walk_eval::State<'a>,
@ -47,7 +47,7 @@ impl<'a> Schala<'a> {
source_reference: SourceReference::new(),
symbol_table: symbol_table::SymbolTable::new(),
type_context: type_inference::TypeContext::new(),
active_parser: parsing::Parser::new(),
active_parser: parsing::new::Parser::new(),
eval_state: tree_walk_eval::State::new(),
timings: Vec::new(),
}
@ -74,18 +74,10 @@ impl<'a> Schala<'a> {
self.timings = vec![];
let sw = Stopwatch::start_new();
// 1st stage - tokenization
// TODO tokenize should return its own error type
let tokens = tokenizing::tokenize(source);
if let Some(err) = SchalaError::from_tokens(&tokens) {
return Err(err);
}
//2nd stage - parsing
self.active_parser.add_new_tokens(tokens);
self.source_reference.load_new_source(source);
let ast = self
.active_parser
.parse()
.parse(source)
.map_err(|err| SchalaError::from_parse_error(err, &self.source_reference))?;
self.timings.push(("parsing", sw.elapsed()));
@ -133,6 +125,7 @@ impl SourceReference {
}
pub(crate) fn load_new_source(&mut self, source: &str) {
self.newline_offsets = vec![];
for (offset, ch) in source.as_bytes().iter().enumerate() {
if *ch == ('\n' as u8) {
self.newline_offsets.push(offset);
@ -143,6 +136,11 @@ impl SourceReference {
// (line_start, line_num, the string itself)
pub fn get_line(&self, line: usize) -> (usize, usize, String) {
if self.newline_offsets.is_empty() {
return (0, 0, self.last_source.as_ref().cloned().unwrap());
}
//TODO make sure this is utf8-safe
let start_idx = match self.newline_offsets.binary_search(&line) {
Ok(index) | Err(index) => index,
@ -192,7 +190,6 @@ impl<'a> ProgrammingLanguageInterface for Schala<'a> {
fn run_computation(&mut self, request: ComputationRequest<Self::Config>) -> ComputationResponse {
let ComputationRequest { source, debug_requests: _, config: _ } = request;
self.source_reference.load_new_source(source);
let sw = Stopwatch::start_new();
let main_output =