From 8b159084183ac2177bb614fcfd5d10ab065207c2 Mon Sep 17 00:00:00 2001
From: overflowerror <mail@overflowerror.com>
Date: Thu, 20 May 2021 17:18:27 +0200
Subject: [PATCH] basic parser

---
 src/parser.y | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/parser.y

diff --git a/src/parser.y b/src/parser.y
new file mode 100644
index 0000000..2a0fd71
--- /dev/null
+++ b/src/parser.y
@@ -0,0 +1,49 @@
+
+%token SECTION TEXT COMMA END
+%token PARAMS_BEGIN PARAMS_END
+%token STATEMENT_BEGIN STATEMENT_END
+%token OUTPUT_BEGIN OUTPUT_END
+
+%start file
+
+%%
+
+file: metaSection SECTION mainSection
+;
+
+metaSection: PARAMS_BEGIN parameters PARAMS_END
+           | STATEMENT_BEGIN metaStatement STATEMENT_END
+;
+
+parameters: /* empty */
+          | parameter moreParameters
+;
+
+parameter: /* empty */
+         | TEXT parameter
+;         
+
+moreParameters: /* empty */
+              | COMMA /* allow trailing commas */
+              | COMMA parameter moreParameters
+;
+
+metaStatement: statement
+;
+
+mainSection: /* empty */
+           | TEXT mainSection
+           | STATEMENT_BEGIN blockStatement STATEMENT_END mainSection
+           | OUTPUT_BEGIN output OUTPUT_END mainSection
+;
+
+blockStatement: statement
+;
+
+statement: TEXT /* statement can't be empty */
+         | TEXT statement
+;
+
+output: TEXT /* output can't be empty */
+      | TEXT output
+;