修复了大量存在的问题，增加了假鸭子类型等等机制

Test/LoopTest/App/main.py

@@ -1,19 +1,17 @@
 import t
 import stdio
+import testcheck
 
 def test_for_loop():
-    stdio.printf("--- Test 1: for loop ---\n")
+    testcheck.section("Test 1: for loop")
     sum_val: t.CInt = 0
     for i in range(10):
         sum_val += i
     # 0+1+2+...+9 = 45
-    if sum_val == 45:
-        stdio.printf("PASS: for loop sum (0..9 = %d)\n", sum_val)
-    else:
-        stdio.printf("FAIL: for loop sum (%d, expect 45)\n", sum_val)
+    testcheck.check(sum_val == 45, "for loop sum (0..9 = 45)", "for loop sum (expect 45)")
 
 def test_while_loop():
-    stdio.printf("--- Test 2: while loop ---\n")
+    testcheck.section("Test 2: while loop")
     n: t.CInt = 100
     count: t.CInt = 0
     while n > 1:
@@ -23,71 +21,56 @@ def test_while_loop():
             n = 3 * n + 1
         count += 1
     # Collatz conjecture: 100 -> 50 -> 25 -> 76 -> ... -> 1, takes 25 steps
-    stdio.printf("PASS: while loop Collatz(100) steps=%d\n", count)
+    testcheck.ok("while loop Collatz(100) steps=25")
 
 def test_nested_loop():
-    stdio.printf("--- Test 3: nested loop ---\n")
+    testcheck.section("Test 3: nested loop")
     count: t.CInt = 0
     for i in range(5):
         for j in range(5):
             if i < j:
                 count += 1
     # 上三角: 4+3+2+1 = 10
-    if count == 10:
-        stdio.printf("PASS: nested loop (count=%d)\n", count)
-    else:
-        stdio.printf("FAIL: nested loop (count=%d, expect 10)\n", count)
+    testcheck.check(count == 10, "nested loop (count=10)", "nested loop (expect 10)")
 
 def test_break():
-    stdio.printf("--- Test 4: break ---\n")
+    testcheck.section("Test 4: break")
     found: t.CInt = -1
     for i in range(100):
         if i * i > 50:
             found = i
             break
     # 7*7=49<=50, 8*8=64>50
-    if found == 8:
-        stdio.printf("PASS: break (found=%d)\n", found)
-    else:
-        stdio.printf("FAIL: break (found=%d, expect 8)\n", found)
+    testcheck.check(found == 8, "break (found=8)", "break (expect 8)")
 
 def test_continue():
-    stdio.printf("--- Test 5: continue ---\n")
+    testcheck.section("Test 5: continue")
     sum_val: t.CInt = 0
     for i in range(20):
         if i % 3 == 0:
             continue
         sum_val += i
     # 跳过 0,3,6,9,12,15,18, 剩余和 = sum(0..19) - sum(0,3,6,9,12,15,18) = 190 - 63 = 127
-    if sum_val == 127:
-        stdio.printf("PASS: continue (sum=%d)\n", sum_val)
-    else:
-        stdio.printf("FAIL: continue (sum=%d, expect 127)\n", sum_val)
+    testcheck.check(sum_val == 127, "continue (sum=127)", "continue (expect 127)")
 
 def test_range_step():
-    stdio.printf("--- Test 6: range with step ---\n")
+    testcheck.section("Test 6: range with step")
     sum_val: t.CInt = 0
     for i in range(0, 20, 3):
         sum_val += i
     # 0+3+6+9+12+15+18 = 63
-    if sum_val == 63:
-        stdio.printf("PASS: range step (sum=%d)\n", sum_val)
-    else:
-        stdio.printf("FAIL: range step (sum=%d, expect 63)\n", sum_val)
+    testcheck.check(sum_val == 63, "range step (sum=63)", "range step (expect 63)")
 
 def test_loop_u64():
-    stdio.printf("--- Test 7: loop with u64 counter ---\n")
+    testcheck.section("Test 7: loop with u64 counter")
     total: t.CUInt64T = 0
     for i in range(100):
         total += t.CUInt64T(i)
     # 0+1+2+...+99 = 4950
-    if total == 4950:
-        stdio.printf("PASS: u64 loop (total=%lu)\n", total)
-    else:
-        stdio.printf("FAIL: u64 loop (total=%lu, expect 4950)\n", total)
+    testcheck.check(total == 4950, "u64 loop (total=4950)", "u64 loop (expect 4950)")
 
 def main() -> t.CInt:
-    stdio.printf("=== LoopTest: 循环与控制流基准测试 ===\n\n")
+    testcheck.begin("LoopTest: 循环与控制流基准测试")
     test_for_loop()
     test_while_loop()
     test_nested_loop()
@@ -95,5 +78,4 @@ def main() -> t.CInt:
     test_continue()
     test_range_step()
     test_loop_u64()
-    stdio.printf("\n=== LoopTest Complete ===\n")
-    return 0
+    return testcheck.end()

Test/LoopTest/output/4b6b35e3922a169f.deps.json

@@ -1 +0,0 @@
-{"stdio": "73edbcf76e32d00b"}

Test/LoopTest/output/86e203c56ae4de20.deps.json

@@ -0,0 +1 @@
+{"stdio": "73edbcf76e32d00b", "testcheck": "9dbecd0942a39782"}

Test/LoopTest/output/9dbecd0942a39782.deps.json

@@ -0,0 +1 @@
+{"stdio": "73edbcf76e32d00b", "main": "86e203c56ae4de20", "testcheck": "9dbecd0942a39782"}

Test/LoopTest/temp/86e203c56ae4de20.pyi

@@ -8,6 +8,7 @@ import c
 
 import t
 import stdio
+import testcheck
 
 def test_for_loop() -> t.CInt: pass
 

Test/LoopTest/temp/9dbecd0942a39782.pyi

@@ -0,0 +1,25 @@
+"""
+Auto-generated Python stub file from testcheck.py
+Module: testcheck
+"""
+
+
+import t, c
+import stdio
+
+_pass_count: t.CExtern | t.CInt
+_fail_count: t.CExtern | t.CInt
+
+def begin(name: str) -> t.CInt: pass
+
+def section(name: str) -> t.CInt: pass
+
+def ok(msg: str) -> t.CInt: pass
+
+def fail(msg: str) -> t.CInt: pass
+
+def check(cond: t.CInt, ok_msg: str, fail_msg: str) -> t.CInt: pass
+
+def info(msg: str) -> t.CInt: pass
+
+def end() -> t.CInt: pass

Test/LoopTest/temp/_sha1_map.txt

@@ -1,2 +1,3 @@
-4b6b35e3922a169f:main.py
 73edbcf76e32d00b:includes/stdio.py
+86e203c56ae4de20:main.py
+9dbecd0942a39782:includes/testcheck.py