Go patch committed: Tweaks for importing inline function bodies

[Ian Lance Taylor]

This patch to the Go frontend adds some tweaks for importing inline
function bodies.

We track whether we've seen an error when importing a function; we
will use error tracking to avoid knock-on errors.

We stop importing identifiers at a ')'.

We provide a way to adjust the indentation level while importing.

Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE     (revision 266534)
+++ gcc/go/gofrontend/MERGE     (working copy)
@@ -1,4 +1,4 @@
-267d91b41571329e71a88f56df46444b305482da
+b013405f2c66596c47cb9be493c798db1087c0f0
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: gcc/go/gofrontend/import.cc
===================================================================
--- gcc/go/gofrontend/import.cc (revision 266530)
+++ gcc/go/gofrontend/import.cc (working copy)
@@ -1225,7 +1225,7 @@ Import::read_identifier()
   while (true)
     {
       c = stream->peek_char();
-      if (c == -1 || c == ' ' || c == '\n' || c == ';')
+      if (c == -1 || c == ' ' || c == '\n' || c == ';' || c == ')')
        break;
       ret += c;
       stream->advance(1);
@@ -1450,7 +1450,7 @@ Import_function_body::read_identifier()
   for (size_t i = start; i < this->body_.length(); i++)
     {
       int c = static_cast<unsigned char>(this->body_[i]);
-      if (c == ' ' || c == '\n' || c == ';')
+      if (c == ' ' || c == '\n' || c == ';' || c == ')')
        {
          this->off_ = i;
          return this->body_.substr(start, i - start);
Index: gcc/go/gofrontend/import.h
===================================================================
--- gcc/go/gofrontend/import.h  (revision 266530)
+++ gcc/go/gofrontend/import.h  (working copy)
@@ -554,7 +554,7 @@ class Import_function_body : public Impo
                       const std::string& body, size_t off, Block* block,
                       int indent)
     : gogo_(gogo), imp_(imp), named_object_(named_object), body_(body),
-      off_(off), block_(block), indent_(indent)
+      off_(off), block_(block), indent_(indent), saw_error_(false)
   { }
 
   // The IR.
@@ -597,6 +597,16 @@ class Import_function_body : public Impo
   indent() const
   { return this->indent_; }
 
+  // Increment the indentation level.
+  void
+  increment_indent()
+  { ++this->indent_; }
+
+  // Decrement the indentation level.
+  void
+  decrement_indent()
+  { --this->indent_; }
+
   // The name of the function we are parsing.
   const std::string&
   name() const;
@@ -652,6 +662,16 @@ class Import_function_body : public Impo
   ifb()
   { return this; }
 
+  // Return whether we have seen an error.
+  bool
+  saw_error() const
+  { return this->saw_error_; }
+
+  // Record that we have seen an error.
+  void
+  set_saw_error()
+  { this->saw_error_ = true; }
+
  private:
   // The IR.
   Gogo* gogo_;