Rewrite parser as recursive descent (#591)

* Remove Bison dependency
* Remove pre-generated parser files
* Rename build config from no-re2c-bison to no-re2c
* Add a simple make_unique implementation
* Move handling of module bindings into ir.cc
* Simplify lexer
  - Remove lookahead, the parser handles this now
  - Unify Token/LexerToken, it only contains terminal values now
  - Refactor setting token type and value into one function (e.g.
    LITERAL, RETURN => RETURN_LITERAL)
* New Parser
  - Uses two tokens of lookahead (use Peek(0) or Peek(1))
  - Consume() consumes one token of any kind
  - Match(t) consumes the current token if it matches
  - PeekMatch(t) returns true iff the token matches, but doesn't consume
  - Basic error synchronization; plenty of room for improvement here

1 files changed, 4 insertions, 17 deletions

diff --git a/src/wast-parser-lexer-shared.cc b/src/wast-parser-lexer-shared.cc
index c9ad9b61..80a9b8bd 100644
--- a/src/wast-parser-lexer-shared.cc
+++ b/src/wast-parser-lexer-shared.cc
@@ -16,27 +16,14 @@
 
 #include "wast-parser-lexer-shared.h"
 
-#include <cstdarg>
-#include <cstdio>
-#include <cstring>
-#include <string>
+#include "common.h"
+#include "error-handler.h"
+#include "wast-lexer.h"
 
 namespace wabt {
 
-void WastParserError(Location* loc,
-                     WastLexer* lexer,
-                     WastParser* parser,
-                     const char* format,
-                     ...) {
-  parser->errors++;
-  va_list args;
-  va_start(args, format);
-  WastFormatError(parser->error_handler, loc, lexer, format, args);
-  va_end(args);
-}
-
 void WastFormatError(ErrorHandler* error_handler,
-                     const struct Location* loc,
+                     const Location* loc,
                      WastLexer* lexer,
                      const char* format,
                      va_list args) {