[#93] fix scanning constant strings

scanner/scanner.rl

@@ -41,6 +41,16 @@ func (lex *Lexer) Lex(lval Lval) int {
         action heredoc_lbl_start {lblStart = lex.p}
         action heredoc_lbl_end   {lblEnd = lex.p}
 
+        action constant_string_new_line   {
+            if lex.data[lex.p] == '\n' {
+                lex.NewLines.Append(lex.p)
+            }
+
+            if lex.data[lex.p] == '\r' && lex.data[lex.p+1] != '\n' {
+                lex.NewLines.Append(lex.p)
+            }
+        }
+
         action is_not_heredoc_end { lex.isNotHeredocEnd(lex.p) }
         action is_not_comment_end { lex.isNotPhpCloseToken() && lex.isNotNewLine()  }
         action is_not_heredoc_end_or_var { lex.isNotHeredocEnd(lex.p) && lex.isNotStringVar() }
@@ -71,37 +81,50 @@ func (lex *Lexer) Lex(lval Lval) int {
                 "'"         -> qoute
                 | "b"i? '"' -> double_qoute
             ),
+
+            # single qoute string
+
             qoute: (
                 (any - [\\'\r\n])                -> qoute
-                | "\r" @{if lex.p+1 != eof && lex.data[lex.p+1] != '\n' {lex.NewLines.Append(lex.p)}} -> qoute
+                | "\r" @constant_string_new_line -> qoute
-                | "\n" @{lex.NewLines.Append(lex.p)} -> qoute
+                | "\n" @constant_string_new_line -> qoute
                 | "\\"                           -> qoute_any
                 | "'"                            -> final
             ),
             qoute_any: (
-                any_line -> qoute
+                (any - [\r\n])                   -> qoute
+                | "\r" @constant_string_new_line -> qoute
+                | "\n" @constant_string_new_line -> qoute
             ),
+
+            # double qoute string
+
             double_qoute: (
                 (any - [\\"${\r\n])                -> double_qoute
-                | "\r" @{if lex.p+1 != eof && lex.data[lex.p+1] != '\n' {lex.NewLines.Append(lex.p)}} -> double_qoute
+                | "\r" @constant_string_new_line   -> double_qoute
-                | "\n" @{lex.NewLines.Append(lex.p)} -> double_qoute
+                | "\n" @constant_string_new_line   -> double_qoute
                 | "\\"                             -> double_qoute_any
                 | '"'                              -> final
                 | '$'                              -> double_qoute_nonvarname
                 | '{'                              -> double_qoute_nondollar
             ),
             double_qoute_any: (
-                any_line -> double_qoute
+                (any - [\r\n])                     -> double_qoute
+                | "\r" @constant_string_new_line   -> double_qoute
+                | "\n" @constant_string_new_line   -> double_qoute
             ),
             double_qoute_nondollar: (
-                '"'    -> final
+                (any - [$"\r\n])                   -> double_qoute
-                | "\\"               -> double_qoute_any
+                | "\r" @constant_string_new_line   -> double_qoute
-                | [^$\\"] -> double_qoute
+                | "\n" @constant_string_new_line   -> double_qoute
+                | '"'                              -> final
             ),
             double_qoute_nonvarname: (
-                '"'                      -> final
+                (any - [\\{"\r\n] - varname_first) -> double_qoute
+                | "\r" @constant_string_new_line   -> double_qoute
+                | "\n" @constant_string_new_line   -> double_qoute
                 | "\\"                             -> double_qoute_any
-                | /[^"\\{a-zA-Z_\x7f-\xff]/ -> double_qoute
+                | '"'                              -> final
             );
 
         main := |*

scanner/scanner_test.go

@@ -191,11 +191,6 @@ func TestTokens(t *testing.T) {
 
 		-> ` + "\t\r\n" + ` ->prop
 
-		'adsf\'adsf\''
-
-		"test"
-		b"\$var $4 {a"
-
 		( array )
 		( bool )
 		( boolean )
@@ -379,10 +374,6 @@ func TestTokens(t *testing.T) {
 		T_OBJECT_OPERATOR.String(),
 		T_STRING.String(),
 
-		T_CONSTANT_ENCAPSED_STRING.String(),
-		T_CONSTANT_ENCAPSED_STRING.String(),
-		T_CONSTANT_ENCAPSED_STRING.String(),
-
 		T_ARRAY_CAST.String(),
 		T_BOOL_CAST.String(),
 		T_BOOL_CAST.String(),
@@ -414,6 +405,62 @@ func TestTokens(t *testing.T) {
 	assert.DeepEqual(t, expected, actual)
 }
 
+func TestConstantStrings(t *testing.T) {
+	src := `<?
+		'str'
+		'\''
+		'\\'
+
+		b"str"
+		"\""
+		"\\"
+
+		"\$var"
+		"$4"
+		"$"
+		"$\\"
+
+		"{"
+		"{a"
+		"\{$"
+	`
+
+	expected := []string{
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+		T_CONSTANT_ENCAPSED_STRING.String(),
+	}
+
+	lexer := NewLexer([]byte(src))
+	lexer.WithFreeFloating = true
+	lv := &lval{}
+	actual := []string{}
+
+	for {
+		token := lexer.Lex(lv)
+		if token == 0 {
+			break
+		}
+
+		actual = append(actual, TokenID(token).String())
+	}
+
+	assert.DeepEqual(t, expected, actual)
+}
+
 func TestSingleQuoteStringTokens(t *testing.T) {
 	src := `<?php
 		'str $var str'
@@ -1388,6 +1435,28 @@ func TestVarNameByteChars(t *testing.T) {
 	assert.Equal(t, "$\xff", lv.Tkn.Value)
 }
 
+func TestStringVarNameByteChars(t *testing.T) {
+	src := "<?php \"$\x80 $\xff\""
+
+	lexer := NewLexer([]byte(src))
+	lv := &lval{}
+
+	lexer.Lex(lv)
+	assert.Equal(t, "\"", lv.Tkn.Value)
+
+	lexer.Lex(lv)
+	assert.Equal(t, "$\x80", lv.Tkn.Value)
+
+	lexer.Lex(lv)
+	assert.Equal(t, " ", lv.Tkn.Value)
+
+	lexer.Lex(lv)
+	assert.Equal(t, "$\xff", lv.Tkn.Value)
+
+	lexer.Lex(lv)
+	assert.Equal(t, "\"", lv.Tkn.Value)
+}
+
 func TestIgnoreControllCharacters(t *testing.T) {
 	src := "<?php \004 echo $b;"