Improve template tokenizing (#13919)

* add benchmarks

* refactor: tokenize template as middle + tail

* perf: avoid push tc.brace

* refactor: overwrite skipSpace in jsx plugin

* transform tl.templateMiddle/Tail

* refactor: simplify JSX context tracking

* fix flow error

* refactor: move JSX context to context.js

* fix: ensure comment stack is correctly handled

* rename createPositionFromPosition

* rename token type and methods

* add tokenIsTemplate

* refactor: merge babel 7 logic in babel7CompatTokens

* fix flow error

packages/babel-parser/src/util/location.js

@@ -50,3 +50,22 @@ export function getLineInfo(input: string, offset: number): Position {
 
   return new Position(line, offset - lineStart);
 }
+
+/**
+ * creates a new position with a non-zero column offset from the given position.
+ * This function should be only be used when we create AST node out of the token
+ * boundaries, such as TemplateElement ends before tt.templateNonTail. This
+ * function does not skip whitespaces.
+ *
+ * @export
+ * @param {Position} position
+ * @param {number} columnOffset
+ * @returns {Position}
+ */
+export function createPositionWithColumnOffset(
+  position: Position,
+  columnOffset: number,
+) {
+  const { line, column } = position;
+  return new Position(line, column + columnOffset);
+}