basic parser

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
+;