Allow silencing N warnings

First N warnings will be silenced with --expect-warnings=N
command line option.

Author: boriel

src/api/config.py

@@ -69,6 +69,7 @@ def init():
     OPTIONS.add_option('strict', bool, False)  # True to force type checking
     OPTIONS.add_option('zxnext', bool, False)  # True to enable ZX Next ASM opcodes
     OPTIONS.add_option('architecture', str, None)  # Architecture
+    OPTIONS.add_option('expect_warnings', int, 0)  # Expected Warnings that will be silenced
 
 
 init()

src/api/errmsg.py

@@ -54,12 +54,15 @@ def error(lineno: int, msg: str, fname: Optional[str] = None) -> None:
 def warning(lineno: int, msg: str, fname: Optional[str] = None) -> None:
     """ Generic warning error routine
     """
+    global_.has_warnings += 1
+    if global_.has_warnings <= OPTIONS.expect_warnings:
+        return
+
     if fname is None:
         fname = global_.FILENAME
 
     msg = "%s:%i: warning: %s" % (fname, lineno, msg)
     msg_output(msg)
-    global_.has_warnings += 1
 
 
 def warning_implicit_type(lineno: int, id_: str, type_: str = None):

src/libzxbc/zxbc.py

@@ -151,6 +151,8 @@ def main(args=None, emitter=None):
     parser.add_argument('--arch', type=str, default=arch.AVAILABLE_ARCHITECTURES[0],
                         help=f"Target architecture (defaults is'{arch.AVAILABLE_ARCHITECTURES[0]}'). "
                              f"Available architectures: {','.join(arch.AVAILABLE_ARCHITECTURES)}")
+    parser.add_argument('--expect-warnings', default=OPTIONS.expect_warnings, type=int,
+                        help='Expects N warnings: first N warnings will be silenced')
 
     options = parser.parse_args(args=args)
 
@@ -176,6 +178,7 @@ def main(args=None, emitter=None):
     OPTIONS.strict = options.strict
     OPTIONS.headerless = options.headerless
     OPTIONS.zxnext = options.zxnext
+    OPTIONS.expect_warnings = gl.EXPECTED_WARNINGS = options.expect_warnings
 
     if options.arch not in arch.AVAILABLE_ARCHITECTURES:
         parser.error(f"Invalid architecture '{options.arch}'")

tests/functional/test_cmdline.txt

@@ -11,7 +11,7 @@ usage: zxbc.py [-h] [-d] [-O OPTIMIZE] [-o OUTPUT_FILE] [-T] [-t] [-B] [-a]
                [-i] [-I INCLUDE_PATH] [--strict] [--headerless] [--version]
                [--parse-only] [--append-binary APPEND_BINARY]
                [--append-headless-binary APPEND_HEADLESS_BINARY] [-N]
-               [--arch ARCH]
+               [--arch ARCH] [--expect-warnings EXPECT_WARNINGS]
                PROGRAM
 zxbc.py: error: Option --asm and --mmap cannot be used together
 

tests/functional/test_errmsg.txt

@@ -176,3 +176,7 @@ prepro76.bi:2: error: this is an intended error
 line_asm.bi:26: warning: this should be line 26
 >>> process_file('line_err.bas')
 line_err.bas:5: error: Variable 'q' already declared at line_err.bas:1
+
+# Test warning silencing
+>>> process_file('mcleod3.bas', ['-S', '-q', '-O --expect-warnings=2'])
+mcleod3.bas:3: error: 'GenerateSpaces' is neither an array nor a function.