Fix row and column calculation for multiline strings (#72)

Author: monstermichl

lexer/lexer.go

@@ -269,6 +269,10 @@ func Tokenize(source string) ([]Token, error) {
 				}
 
 				if !appended {
+					if c0 == "\n" {
+						row++
+						ogColumn = startIndex
+					}
 					str += c0
 					i++
 				}

tests/strings.go

@@ -1,6 +1,7 @@
 package tests
 
 import (
+	"regexp"
 	"strings"
 	"testing"
 
@@ -136,6 +137,23 @@ func testMultilineStringSuccess(t *testing.T, transpilerFunc transpilerFunc) {
 	})
 }
 
+func testMultilineStringErrorPositionSuccess(t *testing.T, transpilerFunc transpilerFunc) {
+	transpilerFunc(t, `
+func test() {
+   var x = 3
+   s := `+"`"+`
+       hello
+       multiline
+       world
+    `+"`"+`
+
+    print(len(x))
+}
+test()`, func(output string, err error) {
+		require.Equal(t, "row 10, column 15", regexp.MustCompile(`row \d+, column \d+`).FindString(err.Error()))
+	})
+}
+
 func testItoaSuccess(t *testing.T, transpilerFunc transpilerFunc) {
 	transpilerFunc(t, `
 		print("Hello World " + itoa(24))

tests/strings_linux_test.go

@@ -48,6 +48,10 @@ func TestMultilineStringSuccess(t *testing.T) {
 	testMultilineStringSuccess(t, transpileBash)
 }
 
+func TestMultilineStringErrorPositionSuccess(t *testing.T) {
+	testMultilineStringErrorPositionSuccess(t, transpileBash)
+}
+
 func TestItoaSuccess(t *testing.T) {
 	testItoaSuccess(t, transpileBash)
 }

tests/strings_windows_test.go

@@ -48,6 +48,10 @@ func TestMultilineStringSuccess(t *testing.T) {
 	testMultilineStringSuccess(t, transpileBatch)
 }
 
+func TestMultilineStringErrorPositionSuccess(t *testing.T) {
+	testMultilineStringErrorPositionSuccess(t, transpileBatch)
+}
+
 func TestItoaSuccess(t *testing.T) {
 	testItoaSuccess(t, transpileBatch)
 }