Add antlr docker image and setup to generate the parser

Makefile

@@ -1,5 +1,14 @@
 THIS_DIR=$(dir $(realpath $(firstword $(MAKEFILE_LIST))))
 
+
+.PHONY: build-antlr-image
+build-antlr-image:
+	cd $(PWD)/bootstrap/grammar/ && docker build -t serene-antlr:latest .
+
+.PHONY: gen-parser-go
+gen-parser-go:
+	docker run -it --rm --user $(shell id -u):$(shell id -g) -v $(PWD):/serene serene-antlr:latest -Dlanguage=Go -o /serene/bootstrap/pkg/parser/ /serene/bootstrap/grammar/Serene.g4
+
 .PHONY: lint
 lint:
 	cd $(THIS_DIR)/bootstrap && cargo fmt -- --check

bootstrap/grammar/Dockerfile

@@ -0,0 +1,5 @@
+FROM openjdk:16-jdk-alpine3.12
+
+WORKDIR /
+RUN wget https://www.antlr.org/download/antlr-4.8-complete.jar
+ENTRYPOINT ["java", "-jar", "/antlr-4.8-complete.jar"]

bootstrap/grammar/Serene.g4

@@ -0,0 +1,27 @@
+grammar Serene;
+/*------------------------------------------------------------------
+ * PARSER RULES
+ *------------------------------------------------------------------*/
+program : expression* EOF ;
+expression: OP SYMBOL (SYMBOL | STRING | NUMBER | expression)* CP;
+
+/*------------------------------------------------------------------
+ * LEXER RULES
+ *------------------------------------------------------------------*/
+SYMBOL : (LETTER (LETTER | DIGIT)*)  ;
+
+OP : '(';
+CP : ')';
+
+STRING : '"' (LETTER | DIGIT)+ '"';
+
+NUMBER : (DIGIT)+ ;
+
+WHITESPACE : [ \r\n\t] + -> channel (HIDDEN);
+
+DIGIT : '0'..'9';
+
+LETTER : LOWER | UPPER ;
+
+LOWER : ('a'..'z') ;
+UPPER : ('A'..'Z') ;