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mirror of https://github.com/Nexoniarz/Finch.git synced 2026-11-03 00:44:27 +00:00
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Structs, arrays, owned strings, memory model, modules, debug info

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- struct with default values; constructors Point(1, 2) / Point(x: 1); field access, auto-deref through pointers
- []T arrays with bounds checks, literals, for-each, push/pop/insert/remove/clear/resize/find/contains/join/slice/reverse/sort
- str carries its length: .len, s[i], +, comparison, sub/find/split/trim/upper/lower/replace/repeat/bytes, str(x), int(s), float(s)
- Memory: values own their memory and are freed at the end of their block; assignment copies, temporaries move;
  parameters are lent and only copied when the function changes them; defer; new()/free() for manual heap memory
- input(), read_file/write_file/file_exists, exit(), fn main([]str args)
- Finch modules: import name, module.fn(), module.Struct
- C structs from headers (fields, fixed arrays, nested); passed and returned by value with the System V x86-64 ABI;
  addr(fn) gives C a callback
- link "file.c" compiles and links your own C code
- -g emits DWARF debug info (gdb/lldb)
- Small C runtime (runtime/finch_rt.c) embedded in the compiler, cached in ~/.cache/finch
- Tests: 58, all clean under valgrind (MEMCHECK=1 tests/run.sh)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-08 18:57:37 +02:00
commit 1dc976bd8f
59 changed files with 4577 additions and 1047 deletions
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17
src/lexer.cpp
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@ -9,12 +9,13 @@ static const std::unordered_map<std::string, Tok> keywords = {
{"else", Tok::Else}, {"while", Tok::While}, {"for", Tok::For},
{"in", Tok::In}, {"break", Tok::Break}, {"continue", Tok::Continue},
{"true", Tok::True}, {"false", Tok::False}, {"null", Tok::Null},
{"import", Tok::Import}, {"link", Tok::Link},
{"import", Tok::Import}, {"link", Tok::Link}, {"struct", Tok::Struct},
{"defer", Tok::Defer},
};
std::vector<Token> lex(const std::string &src, const std::string &file) {
g_file = file;
g_source = src;
std::vector<Token> lex(int file) {
g_curFile = file;
const std::string &src = g_files[file].text;
std::vector<Token> out;
size_t i = 0;
int line = 1, col = 1;
@ -126,10 +127,7 @@ std::vector<Token> lex(const std::string &src, const std::string &file) {
case '!': n == '=' ? two(Tok::NotEq) : one(Tok::Not); break;
case '<': n == '=' ? two(Tok::LessEq) : n == '<' ? two(Tok::Shl) : one(Tok::Less); break;
case '>': n == '=' ? two(Tok::GreaterEq) : n == '>' ? two(Tok::Shr) : one(Tok::Greater); break;
case ':':
if (n != '=') fail(line, col, "unexpected ':' (did you mean ':='?)");
two(Tok::Declare);
break;
case ':': n == '=' ? two(Tok::Declare) : one(Tok::Colon); break;
case '&': n == '&' ? two(Tok::And) : one(Tok::Amp); break;
case '|': n == '|' ? two(Tok::Or) : one(Tok::Pipe); break;
default: {
@ -169,6 +167,9 @@ const char *tokName(Tok t) {
case Tok::Null: return "'null'";
case Tok::Import: return "'import'";
case Tok::Link: return "'link'";
case Tok::Struct: return "'struct'";
case Tok::Defer: return "'defer'";
case Tok::Colon: return "':'";
case Tok::LParen: return "'('";
case Tok::RParen: return "')'";
case Tok::LBrace: return "'{'";