[willow]: frontend plumbing (#13)

...

1 files changed, 20 insertions, 1 deletions

diff --git a/willow/tools/willowc/lib/parser.cpp b/willow/tools/willowc/lib/parser.cpp
index becc171..e658909 100644
--- a/willow/tools/willowc/lib/parser.cpp
+++ b/willow/tools/willowc/lib/parser.cpp
@@ -2,8 +2,27 @@
 
 namespace willowc {
 
-std::optional<std::unique_ptr<ModuleAST>> parse() {
+std::optional<std::unique_ptr<ModuleAST>> Parser::run() {
+  bool failed = false;
+  while (true) {
+    Token t = tokenizer_.scan();
 
+    if (t.kind == TokenKind::Eof) {
+      willow::emit(diagnostic_engine_, willow::Severity::Debug)
+          << std::format("[ <eof> :: {} : ({}, {}) ]", t.kind, t.start, t.end);
+      break;
+    }
+    willow::emit(diagnostic_engine_, willow::Severity::Debug)
+        << std::format("[ '{}' :: {} : ({}, {}) ]",
+                       tokenizer_.buf.substr(t.start, t.end - t.start), t.kind,
+                       t.start, t.end);
+  }
+  return std::nullopt;
 }
 
+willow::DiagnosticBuilder Parser::emitParserError(Token t, willow::Severity severity) {
+  willow::Location loc = file_.getLoc(t.start);
+  return willow::DiagnosticBuilder(diagnostic_engine_, severity, loc);
 }
+
+} // namespace willowc