From 1bea958fedb9d58f17b64e1800e8ab8f31c63157 Mon Sep 17 00:00:00 2001
From: Karchnu <karchnu@karchnu.fr>
Date: Fri, 18 Dec 2020 04:12:10 +0100
Subject: [PATCH] Reading property values.

---
 src/parse.zig | 47 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/src/parse.zig b/src/parse.zig
index 99c61f4..492a417 100644
--- a/src/parse.zig
+++ b/src/parse.zig
@@ -189,6 +189,7 @@ const Parser = struct {
                         // Propagate memory errors.
                         error.OutOfMemory => { return (error.OutOfMemory); },
                         error.InvalidCharacter => continue,
+                        error.NoSpaceLeft => continue,
                         error.Overflow => continue,
                         error.ParseError => continue,
                     }; // |normal_value| { stuff; to; do; }
@@ -201,6 +202,7 @@ const Parser = struct {
                         // Propagate memory errors.
                         error.OutOfMemory => { return (error.OutOfMemory); },
                         error.InvalidCharacter => continue,
+                        error.NoSpaceLeft => continue,
                         error.Overflow => continue,
                         error.ParseError => {
                              p.say("we catched a ParseError on token: {}\n"
@@ -376,11 +378,13 @@ const Parser = struct {
                  .StringLiteral => {
                      return PropertyValue{.string = p.giveTokenContent(token)};
                  },
+
                  .IntegerLiteral => {
                      return PropertyValue{
                          .integer = try std.fmt.parseInt(u64, p.giveTokenContent(token), 10)
                      };
                  },
+
                  .FloatLiteral => {
                      // p.say("property: {} {} = {}\n"
                      //     , .{p.giveTokenContent(class_name)
@@ -390,13 +394,17 @@ const Parser = struct {
                          .float = try std.fmt.parseFloat(f64, p.giveTokenContent(token))
                      };
                  },
+
                  .Identifier => {
                      // Loop over identifier and points.
-                     return error.ParseError;
-                     // p.putBackToken(token);
-                     // // TODO: do the loop
-                     // const string: []const u8 = p.giveStringFromReference();
+                     p.putBackToken(token);
+                     const string = try p.parseReference();
+                     p.say("parsed reference: {}\n", .{string});
+                     return PropertyValue{
+                         .reference = string
+                     };
                  },
+
                  else => {
                       return error.ParseError;
                  }
@@ -404,6 +412,37 @@ const Parser = struct {
         }
     }
 
+    // Get the representation of the reference in a simple string.
+    fn parseReference(p: *Parser) ![]u8 {
+
+        var representation: [100]u8 = undefined;
+        var fbs = std.io.fixedBufferStream(representation[0..]);
+
+        // First part of the reference has to be an Identifier.
+        const id = try p.expectToken(.Identifier);
+        try std.fmt.format(fbs.writer(), "{}", .{p.giveTokenContent(id)});
+
+        while (true) {
+            const token = p.nextToken();
+            switch (p.token_ids[token]) {
+
+                .Period => {
+                    p.say("reading a point\n", .{});
+                    // Following token is expected to be an Identifier.
+                    const following = try p.expectToken(.Identifier);
+                    try std.fmt.format(fbs.writer(), ".{}", .{p.giveTokenContent(following)});
+                },
+
+                else => {
+                    p.putBackToken(token);
+                    break;
+                },
+            }
+        }
+
+        return representation[0..fbs.pos];
+    }
+
     fn parseProperty(p: *Parser) !void {
         const property = try p.expectToken(.Keyword_property);
         const class_name = try p.expectToken(.Identifier);