feat: lex many productions

src/01_lexic/root.zig

@@ -5,15 +5,53 @@ const token = @import("./token.zig");
 const TokenType = token.TokenType;
 const Token = token.Token;
 
-pub fn tokenize(input: []const u8) !void {
+pub fn tokenize(input: []const u8, alloc: std.mem.Allocator) !void {
     const input_len = input.len;
-    const next_token = try number.lex(input, input_len, 0);
+    var current_pos: usize = 0;
 
-    if (next_token) |tuple| {
-        const t = tuple[0];
+    var tokens = std.ArrayList(Token).init(alloc);
+    defer tokens.deinit();
 
-        std.debug.print("{s}\n", .{t.value});
-    } else {
-        std.debug.print("no token found :c", .{});
+    while (current_pos < input_len) {
+        const actual_next_pos = ignore_whitespace(input, current_pos);
+
+        const next_token = try number.lex(input, input_len, actual_next_pos);
+        if (next_token) |tuple| {
+            const t = tuple[0];
+            current_pos = tuple[1];
+
+            try tokens.append(t);
+        } else {
+            // no lexer matched
+            std.debug.print("unmatched args: anytype:c\n", .{});
+            break;
+        }
     }
+
+    std.debug.print("array list len: {d}", .{tokens.items.len});
+}
+
+/// Ignores all whitespace from usize,
+/// and returns the position where whitespace ends.
+///
+/// Whitespace is: tabs, spaces
+pub fn ignore_whitespace(input: []const u8, start: usize) usize {
+    const cap = input.len;
+    var pos = start;
+
+    while (pos < cap and (input[pos] == ' ' or input[pos] == '\t')) {
+        pos += 1;
+    }
+
+    return pos;
+}
+
+test "should insert 1 item" {
+    const input = "322";
+    try tokenize(input, std.testing.allocator);
+}
+
+test "should insert 2 item" {
+    const input = "322 644";
+    try tokenize(input, std.testing.allocator);
 }

src/main.zig

@@ -24,7 +24,10 @@ fn repl() !void {
     defer std.heap.page_allocator.free(bare_line);
     const line = std.mem.trim(u8, bare_line, "\r");
 
-    try lexic.tokenize(line);
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    const alloc = gpa.allocator();
+
+    try lexic.tokenize(line, alloc);
 
     try bw.flush();
 }