imjasonh/nescript
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Add README, LICENSE, examples, fix draw parser lookahead

Browse source 
README: project overview, quick start, feature list, example table
LICENSE: MIT
4 new examples covering all language features:
  - arrays_and_functions: arrays, while loops, inline/regular functions
  - state_machine: multi-state flow with on enter/exit handlers
  - sprites_and_palettes: inline CHR data, palette switching, scroll, cast
  - mmc1_banked: MMC1 mapper, bank declarations, software multiply

Parser fix: draw statement keyword-arg parsing now checks for ':'
lookahead before consuming an identifier, preventing it from eating
the next statement as a keyword argument (e.g., `i += 1` after a draw).

https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
This commit is contained in:
Claude 2026-04-12 00:38:19 +00:00
parent 5434dda114
commit b8c9e41276
No known key found for this signature in database
8 changed files with 560 additions and 44 deletions
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9
src/parser/mod.rs
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@ -39,6 +39,10 @@ impl Parser {
.map_or(&TokenKind::Eof, |t| &t.kind)
}
fn peek_at_offset(&self, offset: usize) -> Option<&TokenKind> {
self.tokens.get(self.pos + offset).map(|t| &t.kind)
}
fn current_span(&self) -> Span {
self.tokens.get(self.pos).map_or(Span::dummy(), |t| t.span)
}
@ -841,7 +845,10 @@ impl Parser {
let mut frame = None;
// Parse keyword arguments: at: (x, y), frame: n
while let TokenKind::Ident(_) = self.peek() {
// Only consume an ident if it's followed by ':', indicating a keyword arg.
while matches!(self.peek(), TokenKind::Ident(_))
&& self.peek_at_offset(1) == Some(&TokenKind::Colon)
{
let (key, _) = self.expect_ident()?;
self.expect(&TokenKind::Colon)?;
match key.as_str() {