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List: llvm-dev
Subject: [llvm-dev] Using YAML I/O to read in a file produces "error: not a sequence" How to fix?
From: "Rebrov, Konstantin via llvm-dev" <llvm-dev () lists ! llvm ! org>
Date: 2021-04-30 4:22:00
Message-ID: SN6PR11MB295773004E21A3153369900BEE5E9 () SN6PR11MB2957 ! namprd11 ! prod ! outlook ! com
[Download RAW message or body]
Dear LLVM engineers,
My name is Konstantin Rebrov. I am trying to recreate a simple program usin=
g YAML I/O to read *.yaml files into in-memory data structures, and write t=
hose same data structures back out into a *.yaml file.
I am following the official documentation/tutorial
https://llvm.org/docs/YamlIO.html
After compilation, my simple program successfully wrote the data structures=
into the output.yaml file. Then I tried to make input work, using that sam=
e output.yaml file as the input.yaml file.
Unfortunately my program failed to parse the YAML file correctly, reporting=
such an error:
input_file2.yaml:1:1: error: not a sequence
-
^
It reports this error for the first character in the file. Even if I remove=
the "---" at the top of the file, it would still omit that error.
I think that I am just missing one tiny detail, that I don't know about yet=
. If there is anyone who has any some experience with YAML I/O, please help=
me solve this problem.
I wrote a detailed description of the exact error that I encountered, under=
what circumstances, and a full listing of my source code, in this StackOve=
rflow post:
https://stackoverflow.com/q/67324812/5500589
Sincerely, Konstantin Rebrov
<Konstantin.rebrov@intel.com>
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<p class="MsoNormal">Dear LLVM engineers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My name is Konstantin Rebrov. I am trying to recreate a simple \
program using YAML I/O to read *.yaml files into in-memory data structures, and write \
those same data structures back out into a *.yaml file.<o:p></o:p></p> <p \
class="MsoNormal">I am following the official documentation/tutorial<o:p></o:p></p> \
<p class="MsoNormal"><a \
href="https://llvm.org/docs/YamlIO.html">https://llvm.org/docs/YamlIO.html</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">After compilation, my simple program successfully wrote the data \
structures into the output.yaml file. Then I tried to make input work, using that \
same output.yaml file as the input.yaml file.<o:p></o:p></p> <p \
class="MsoNormal">Unfortunately my program failed to parse the YAML file correctly, \
reporting such an error:<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="vertical-align:baseline"><span \
style="font-size:10.0pt;font-family:"inherit",serif;border:none windowtext \
1.0pt;padding:0in">input_file2.yaml:1:1: error: not a sequence<o:p></o:p></span></p> \
<p class="MsoNormal" style="vertical-align:baseline"><span \
style="font-size:10.0pt;font-family:"inherit",serif;border:none windowtext \
1.0pt;padding:0in">-<o:p></o:p></span></p> <p class="MsoNormal" \
style="vertical-align:baseline"><span \
style="font-size:10.0pt;font-family:"inherit",serif;border:none windowtext \
1.0pt;padding:0in">^</span><span \
style="font-size:10.0pt;font-family:Consolas"><o:p></o:p></span></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">It reports this error \
for the first character in the file. Even if I remove the "---" at the top \
of the file, it would still omit that error.<o:p></o:p></p> <p class="MsoNormal">I \
think that I am just missing one tiny detail, that I don’t know about yet. If \
there is anyone who has any some experience with YAML I/O, please help me solve this \
problem.<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I wrote a detailed description of the exact error that I \
encountered, under what circumstances, and a full listing of my source code, in this \
StackOverflow post:<o:p></o:p></p> <p class="MsoNormal"><a \
href="https://stackoverflow.com/q/67324812/5500589">https://stackoverflow.com/q/67324812/5500589</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sincerely, Konstantin Rebrov<o:p></o:p></p>
<p class="MsoNormal"><Konstantin.rebrov@intel.com><o:p></o:p></p>
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