Marko v3: Calculate binary expression with literals at compile-time

compiler/ast/BinaryExpression.js

@@ -34,6 +34,18 @@ class BinaryExpression extends Node {
             throw new Error('Invalid BinaryExpression: ' + this);
         }
 
+        if (left.type === 'Literal' && right.type === 'Literal') {
+            if (operator === '+') {
+                return codegen.generateCode(codegen.builder.literal(left.value + right.value));
+            } else if (operator === '-') {
+                return codegen.generateCode(codegen.builder.literal(left.value - right.value));
+            } else if (operator === '*') {
+                return codegen.generateCode(codegen.builder.literal(left.value * right.value));
+            } else if (operator === '/') {
+                return codegen.generateCode(codegen.builder.literal(left.value / right.value));
+            }
+        }
+
         generateCodeForOperand(left, codegen);
         codegen.write(' ');
         codegen.generateCode(operator);

test/fixtures/codegen/autotest/binaryExpression-literal-divide/expected.js

@@ -0,0 +1 @@
+5

test/fixtures/codegen/autotest/binaryExpression-literal-divide/index.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = function(builder) {
+    return builder.binaryExpression(
+        builder.literal(10),
+        '/',
+        builder.literal(2));
+};

test/fixtures/codegen/autotest/binaryExpression-literal-multiply/expected.js

@@ -0,0 +1 @@
+10

test/fixtures/codegen/autotest/binaryExpression-literal-multiply/index.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = function(builder) {
+    return builder.binaryExpression(
+        builder.literal(2),
+        '*',
+        builder.literal(5));
+};

test/fixtures/codegen/autotest/binaryExpression-literal-subtract/expected.js

@@ -0,0 +1 @@
+4

test/fixtures/codegen/autotest/binaryExpression-literal-subtract/index.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = function(builder) {
+    return builder.binaryExpression(
+        builder.literal(5),
+        '-',
+        builder.literal(1));
+};

test/fixtures/codegen/autotest/concat-strings/expected.js

@@ -0,0 +1 @@
+"ab"

test/fixtures/codegen/autotest/concat-strings/index.js

@@ -0,0 +1,7 @@
+'use strict';
+
+module.exports = function(builder) {
+    return builder.concat(
+        builder.literal('a'),
+        builder.literal('b'));
+};