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Re: [Tinycc-devel] Preprocessing issue?
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From: |
Michael Matz |
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Subject: |
Re: [Tinycc-devel] Preprocessing issue? |
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Date: |
Sun, 9 Jul 2017 05:39:48 +0200 (CEST) |
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User-agent: |
Alpine 2.20 (LSU 67 2015-01-07) |
Hi,
On Wed, 5 Jul 2017, Patrick Pelissier wrote:
I think I found an issue in the preprocessor of tcc.The following program:
[...]
TEST3((INIT(KO))) // ==> expect ok, get "error: macro 'KO' used
with too many args"
produces an error "error: macro 'KO' used with too many args"
Yikes! My eyes bleed, who writes such pre-processor abominations? ;-)
It's an interesting corner case that took some time to analyze. Basically
we must not look ahead too far for '(' when looking at a token that could
start a function-like macro invocation. But our implementation of "not
too far" was wrong. Fixed in mob d8fdd38 .
I wasn't able to reduce the test case any further.
Yeah. In above commit the testcase I added contains some lines showing
the problem already a bit earlier but not much.
Ciao,
Michael.