From 3931f5b6df7c222ac3c6b18fbbb919e73dfce340 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Tue, 29 Nov 2022 14:35:02 +0100
Subject: [PATCH] parse error declarations

---
 ast/ast.ha        |  7 +++++++
 parse/document.ha | 20 +++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/ast/ast.ha b/ast/ast.ha
index bdcd459..c9ca1ab 100644
--- a/ast/ast.ha
+++ b/ast/ast.ha
@@ -3,6 +3,7 @@ export type document = struct {
 	namespace: ident,
 	imports: []ident,
 	interfaces: []interface,
+	errors: []error,
 };
 
 // An IPC interface.
@@ -13,6 +14,12 @@ export type interface = struct {
 	methods: []method,
 };
 
+// An error type.
+export type error = struct {
+	name: str,
+	value: ipc_type,
+};
+
 // An IPC method.
 export type method = struct {
 	name: str,
diff --git a/parse/document.ha b/parse/document.ha
index 5cdf6a6..d4fe87a 100644
--- a/parse/document.ha
+++ b/parse/document.ha
@@ -1,4 +1,5 @@
 use ast;
+use ast::{ptype};
 use lex;
 use lex::{ltok};
 use strings;
@@ -27,7 +28,8 @@ export fn document(lex: *lex::lexer) (ast::document | error) = {
 		case ltok::ENUM =>
 			abort(); // TODO
 		case ltok::ERROR =>
-			abort(); // TODO
+			const err = parse_error(lex)?;
+			append(doc.errors, err);
 		case ltok::EOF =>
 			break;
 		};
@@ -52,3 +54,19 @@ fn imports(lex: *lex::lexer) ([]ast::ident | error) = {
 	};
 	return imports;
 };
+
+fn parse_error(lex: *lex::lexer) (ast::error | error) = {
+	const name = strings::dup(want(lex, ltok::WORD)?.1 as str);
+
+	let value: ast::ipc_type = ptype::VOID;
+	if (try(lex, ltok::COLON)? is lex::token) {
+		value = ipc_type(lex)?;
+	};
+
+	want(lex, ltok::SEMICOLON)?;
+
+	return ast::error {
+		name = name,
+		value = value,
+	};
+};
-- 
2.38.5