[vala/wip/fast-vapi: 12/12] vala: Write "Source" attribute in fast-vapi mode

[Rico Tzschichholz <ricotz src gnome org>]

commit 72e5cc385e95bc62b301da1342194823f974b3d7
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Mar 30 19:37:45 2019 +0100

    vala: Write "Source" attribute in fast-vapi mode
    
    This enables users to reference to the original source of a symbol.
    
    [Source (filename = "...", line = ..., column = ...)]

 vala/valacodewriter.vala | 12 ++++++++++++
 vala/valausedattr.vala   |  2 ++
 2 files changed, 14 insertions(+)
---
diff --git a/vala/valacodewriter.vala b/vala/valacodewriter.vala
index f3967a15c..53af9fb6c 100644
--- a/vala/valacodewriter.vala
+++ b/vala/valacodewriter.vala
@@ -1584,6 +1584,10 @@ public class Vala.CodeWriter : CodeVisitor {
                                continue;
                        }
 
+                       if (attr.name == "Source") {
+                               continue;
+                       }
+
                        if (sym != null && attr.args.size == 1 && attr.name == "Version") {
                                string since_val = attr.get_string ("since");
                                if (since_val != null && skip_since_tag_check (sym, since_val)) {
@@ -1621,6 +1625,14 @@ public class Vala.CodeWriter : CodeVisitor {
                                write_newline ();
                        }
                }
+
+               if (type == CodeWriterType.FAST && !(node is Parameter || node is PropertyAccessor)) {
+                       var source_reference = node.source_reference;
+                       if (source_reference != null) {
+                               stream.puts ("[Source (filename = \"%s\", line = %i, column = %i)]".printf 
(source_reference.file.get_relative_filename (), source_reference.begin.line, source_reference.begin.column));
+                               write_newline ();
+                       }
+               }
        }
 
        private void write_accessibility (Symbol sym) {
diff --git a/vala/valausedattr.vala b/vala/valausedattr.vala
index c4c05cdaa..ce9fbaf1d 100644
--- a/vala/valausedattr.vala
+++ b/vala/valausedattr.vala
@@ -76,6 +76,8 @@ public class Vala.UsedAttr : CodeVisitor {
                "ScanfFormat", "",
                "FormatArg", "",
 
+               "Source", "filename", "line", "column", "",
+
                "GtkChild", "name", "internal", "",
                "GtkTemplate", "ui", "",
                "GtkCallback", "name", "",