implement identity filter

1 files changed, 33 insertions, 0 deletions

diff --git a/src/jq/parse.zig b/src/jq/parse.zig
new file mode 100644
index 0000000..0554dca
--- /dev/null
+++ b/src/jq/parse.zig
@@ -0,0 +1,33 @@
+const std = @import("std");
+const Token = @import("./tokenize.zig").Token;
+
+pub const ParseError = error{
+    UnexpectedEnd,
+    InvalidQuery,
+};
+
+pub const AstKind = enum {
+    identity,
+};
+
+pub const Ast = struct {
+    kind: AstKind,
+};
+
+pub fn parse(allocator: std.mem.Allocator, tokens: []const Token) !*Ast {
+    if (tokens.len != 2) {
+        return ParseError.InvalidQuery;
+    }
+    const t1 = tokens[0];
+    const t2 = tokens[1];
+    if (t1.kind != .identity) {
+        return ParseError.InvalidQuery;
+    }
+    if (t2.kind != .end) {
+        return ParseError.UnexpectedEnd;
+    }
+
+    const root = try allocator.create(Ast);
+    root.kind = .identity;
+    return root;
+}