first commit

src/main.zig

@@ -0,0 +1,42 @@
+const std = @import("std");
+const al = @import("al");
+
+pub fn nodeName(node: *al.Parser.Node) void {
+    switch (node.@"type") {
+        .start => std.debug.print("{d} [label=\"start\",fillcolor=yellow, color=black, shape=box]", .{node.id}),
+        .add => std.debug.print("{d} [label=\"+\"]", .{node.id}),
+        .sub => std.debug.print("{d} [label=\"-\"]", .{node.id}),
+        .mul => std.debug.print("{d} [label=\"*\"]", .{node.id}),
+        .div => std.debug.print("{d} [label=\"/\"]", .{node.id}),
+        .integer => std.debug.print("{d} [label=\"{d}\"]", .{node.id, node.data.integer}),
+        .float => std.debug.print("{d} [label=\"{d}\"]", .{node.id, node.data.float}),
+        else => {},
+    }
+    std.debug.print("\n", .{});
+}
+
+pub fn printGraph(node: *al.Parser.Node) void {
+    for (node.inputs.items) |n| {
+        nodeName(n);
+        std.debug.print("{d}->{d}\n", .{node.id, n.id});
+        printGraph(n);
+    }
+}
+
+pub fn main() !void {
+    var gpa = std.heap.DebugAllocator(.{}).init;
+    defer {
+        //_ = gpa.detectLeaks();
+    }
+    const allocator = gpa.allocator();
+
+    var lexer = al.Lexer.init(@constCast("3*2+2.2"));
+    var parser = al.Parser.init(allocator, &lexer);
+    defer parser.deinit();
+    const graph = try parser.buildGraph();
+    defer graph.?.deinit(&parser);
+    std.debug.print("digraph G {{\n", .{});
+    nodeName(graph.?);
+    printGraph(graph.?);
+    std.debug.print("}}\n", .{});
+}