compiler: support map literals

pkg/compiler/map_test.go

@@ -0,0 +1,46 @@
+package compiler_test
+
+import (
+	"math/big"
+	"testing"
+)
+
+var mapTestCases = []testCase{
+	{
+		"map composite literal",
+		`
+		package foo
+		func Main() int {
+			t := map[int]int{
+				1: 6,
+				2: 9,
+			}
+
+			age := t[2]
+			return age
+		}
+		`,
+		big.NewInt(9),
+	},
+	{
+		"nested map",
+		`
+		package foo
+		func Main() int {
+		t := map[int]map[int]int{
+			1: map[int]int{2: 5, 3: 1},
+			2: nil,
+			5: map[int]int{3: 4, 7: 2},
+		}
+
+		x := t[5][3]
+		return x
+	}
+	`,
+		big.NewInt(4),
+	},
+}
+
+func TestMaps(t *testing.T) {
+	runTestCases(t, mapTestCases)
+}