KT-1385 support multi line strings with templates

compiler/testData/codegen/multilineStringsWithTemplates.jet

@@ -0,0 +1,31 @@
+fun box() : String {
+    val s = "abc"
+    val test1 = """$s"""
+    if (test1 != "abc") return "Fail 1: $test1"
+
+    val test2 = """${s}"""
+    if (test2 != "abc") return "Fail 2: $test2"
+
+    val test3 = """ "$s" """
+    if (test3 != " \"abc\" ") return "Fail 3: $test3"
+
+    val test4 = """ "${s}" """
+    if (test4 != " \"abc\" ") return "Fail 4: $test4"
+
+    val test5 =
+"""
+  ${s.length}
+"""
+    if (test5 != "\n  3\n") return "Fail 5: $test5"
+
+    val test6 = """\n"""
+    if (test6 != "\\n") return "Fail 6: $test6"
+
+    val test7 = """\${'$'}foo"""
+    if (test7 != "\\\$foo") return "Fail 7: $test7"
+
+    val test8 = """$ foo"""
+    if (test8 != "$ foo") return "Fail 8: $test8"
+
+    return "OK"
+}

compiler/testData/diagnostics/tests/MultilineStringTemplates.jet

@@ -0,0 +1,43 @@
+fun box() : String {
+    val s = "abc"
+    val test1 = """$s"""
+    if (test1 != "abc") return "Fail 1: $test1"
+
+    val test2 = """${s}"""
+    if (test2 != "abc") return "Fail 2: $test2"
+
+    val test3 = """ "$s" """
+    if (test3 != " \"abc\" ") return "Fail 3: $test3"
+
+    val test4 = """ "${s}" """
+    if (test4 != " \"abc\" ") return "Fail 4: $test4"
+
+    val test5 =
+"""
+  ${s.length}
+"""
+    if (test5 != "\n  3\n") return "Fail 5: $test5"
+
+    val test6 = """\n"""
+    if (test6 != "\\n") return "Fail 6: $test6"
+
+    val test7 = """\${'$'}foo"""
+    if (test7 != "\\\$foo") return "Fail 7: $test7"
+
+    val test8 = """$ foo"""
+    if (test8 != "$ foo") return "Fail 8: $test8"
+
+    return "OK"
+}
+
+
+fun new() : String {
+  return """
+    sdfasdf
+    ${<!UNRESOLVED_REFERENCE!>a<!>}
+    ds"asdfas
+    $<!UNRESOLVED_REFERENCE!>b<!>
+    asgfaf
+  """
+
+}

compiler/testData/psi/SimpleExpressions.txt

@@ -105,8 +105,11 @@ JetFile: SimpleExpressions.jet
         PsiWhiteSpace(' ')
         PsiElement(EQ)('=')
         PsiWhiteSpace(' ')
-        STRING_CONSTANT
-          PsiElement(RAW_STRING_LITERAL)('"""dsf"""')
+        STRING_TEMPLATE
+          PsiElement(OPEN_QUOTE)('"""')
+          LITERAL_STRING_TEMPLATE_ENTRY
+            PsiElement(REGULAR_STRING_PART)('dsf')
+          PsiElement(CLOSING_QUOTE)('"""')
       PsiElement(COMMA)(',')
       PsiWhiteSpace('\n    ')
       VALUE_PARAMETER

compiler/testData/psi/When.txt

@@ -259,8 +259,11 @@ JetFile: When.jet
             PsiElement(is)('is')
             PsiWhiteSpace(' ')
             EXPRESSION_PATTERN
-              STRING_CONSTANT
-                PsiElement(RAW_STRING_LITERAL)('"""ddd"""')
+              STRING_TEMPLATE
+                PsiElement(OPEN_QUOTE)('"""')
+                LITERAL_STRING_TEMPLATE_ENTRY
+                  PsiElement(REGULAR_STRING_PART)('ddd')
+                PsiElement(CLOSING_QUOTE)('"""')
           PsiWhiteSpace(' ')
           PsiElement(ARROW)('->')
           PsiWhiteSpace(' ')