Add modulo expression

src/main/java/com/ruke/vrjassc/translator/expression/ModuloExpression.java

@@ -0,0 +1,20 @@
+package com.ruke.vrjassc.translator.expression;
+
+public class ModuloExpression extends Expression {
+
+    Expression a;
+    Expression b;
+
+    public ModuloExpression(Expression a, Expression b) {
+        this.a = a;
+        this.b = b;
+
+        this.a.setParent(this);
+        this.b.setParent(this);
+    }
+
+    @Override
+    public String translate() {
+        return "ModuloReal(" + this.a.translate() + "," + this.b.translate() + ")";
+    }
+}

src/main/java/com/ruke/vrjassc/vrjassc/phase/TranslationPhase.java

@@ -124,6 +124,14 @@ public Expression visitInteger(IntegerContext ctx) {
 		return new RawExpression(ctx.getText(), this.scope.resolve("integer"));
 	}
 
+	@Override
+	public Expression visitModulo(ModuloContext ctx) {
+		Expression a = this.visit(ctx.left);
+		Expression b = this.visit(ctx.right);
+
+		return new ModuloExpression(a, b);
+	}
+
 	@Override
 	public Expression visitDiv(DivContext ctx) {
 		Expression a = this.visit(ctx.left);

src/test/java/com/ruke/vrjassc/vrjassc/compiler/FunctionTest.java

@@ -8,6 +8,25 @@
 
 public class FunctionTest extends TestHelper {
 
+	@Test
+	public void modulo() {
+		String code =
+			"function foo\n" +
+				"local integer i = 2 % 1\n" +
+				"local real r = 2.1 % 1\n" +
+			"end";
+
+		String expected =
+			"globals\n" +
+			"endglobals\n" +
+			"function foo takes nothing returns nothing\n" +
+				"local integer i=ModuloReal(2,1)\n" +
+				"local real r=ModuloReal(2.1,1)\n" +
+			"endfunction";
+
+		assertEquals(expected, this.run(code));
+	}
+
 	@Test
 	public void continueStatement() {
 		String code =

vrjass.g4

@@ -51,6 +51,7 @@ expression
     | cast                                      #ignoreCastExpression
     | MINUS expression                          #Negative
     | NOT expression                            #Not
+    | left=expression MOD right=expression      #Modulo
     | left=expression DIV right=expression      #Div
     | left=expression TIMES right=expression    #Mult
     | left=expression MINUS right=expression    #Minus
@@ -303,6 +304,7 @@ PAREN_RIGHT: ')';
 BRACKET_LEFT: '[';
 BRACKET_RIGHT: ']';
 COMMA: ',';
+MOD: '%';
 DIV: '/';
 TIMES: '*';
 MINUS: '-';