Merge pull request universal-ctags#3949 from masatake/javascript--static-block

JavaScript: skip static initialization blocks

Author: masatake

Units/parser-javascript.r/js-static-block.d/args.ctags

@@ -0,0 +1 @@
+--sort=no

Units/parser-javascript.r/js-static-block.d/expected.tags

@@ -0,0 +1,7 @@
+a	input.js	/^class a {$/;"	c
+b	input.js	/^    static { class b {} }$/;"	c	class:a
+fld0	input.js	/^    fld0;$/;"	M	class:a
+c	input.js	/^    static { class c {} }$/;"	c	class:a
+fld1	input.js	/^    static fld1;$/;"	M	class:a
+d	input.js	/^    static { class d {} }$/;"	c	class:a
+fld2	input.js	/^    static fld2 = 1;$/;"	M	class:a

Units/parser-javascript.r/js-static-block.d/input.js

@@ -0,0 +1,10 @@
+// Derived from #3948 submitted by @cpardotortosa
+class a {
+    static { class b {} }
+    fld0;
+    static { class c {} }
+    static fld1;
+    static { class d {} }
+    static fld2 = 1;
+}
+a.b

Units/parser-javascript.r/js-static-block.d/validator

@@ -0,0 +1 @@
+node

parsers/jscript.c

@@ -1966,13 +1966,22 @@ static bool parseMethods (tokenInfo *const token, int class_index,
 	 *     field1 = 1
 	 * The parser extracts field0 as a method because the left value
 	 * is a function (kind propagation), and field1 as a field.
+	 *
+	 * static methods and static initialization blocks
+	 * - ref. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks
+	 *
+	 *      static func() {}
+	 *      static {}
+	 *      static prop;
+	 *      static prop = val;
 	 */
 
 	bool dont_read = false;
 	do
 	{
 		bool is_setter = false;
 		bool is_getter = false;
+		bool is_static = false;	/* For recognizing static {...} block. */
 
 		if (!dont_read)
 			readToken (token);
@@ -1985,6 +1994,8 @@ static bool parseMethods (tokenInfo *const token, int class_index,
 
 		if (isKeyword (token, KEYWORD_async))
 			readToken (token);
+		else if (isKeyword (token, KEYWORD_static))
+			is_static = true;
 		else if (isType (token, TOKEN_KEYWORD) &&
 				 (isKeyword (token, KEYWORD_get) || isKeyword (token, KEYWORD_set)))
 		{
@@ -2014,8 +2025,9 @@ static bool parseMethods (tokenInfo *const token, int class_index,
 			continue;
 		}
 
-		if (! isType (token, TOKEN_KEYWORD) &&
-			! isType (token, TOKEN_SEMICOLON))
+		if ((! isType (token, TOKEN_KEYWORD) &&
+			 ! isType (token, TOKEN_SEMICOLON))
+			|| is_static)
 		{
 			bool is_generator = false;
 			bool is_shorthand = false; /* ES6 shorthand syntax */
@@ -2190,6 +2202,15 @@ static bool parseMethods (tokenInfo *const token, int class_index,
 
 				vStringDelete (signature);
 			}
+			else if (is_static)
+			{
+				if (isType (token, TOKEN_OPEN_CURLY))
+					/* static initialization block */
+					parseBlock (token, class_index);
+				else
+					dont_read = true;
+				continue;
+			}
 			else
 			{
 				bool is_property = isType (token, TOKEN_COMMA);