Update cheatsheets

yacc

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# yacc
+
+> Generate an LALR parser (in C) with a formal grammar specification file.
+> See also: `bison`.
+> More information: <https://manned.org/man/yacc.1p>.
+
+- Create a file `y.tab.c` containing the C parser code and compile the grammar file with all necessary constant declarations for values. (Constant declarations file `y.tab.h` is created only when the `-d` flag is used):
+
+`yacc -d {{path/to/grammar_file.y}}`
+
+- Compile a grammar file containing the description of the parser and a report of conflicts generated by ambiguities in the grammar:
+
+`yacc -d {{path/to/grammar_file.y}} -v`
+
+- Compile a grammar file, and prefix output filenames with `prefix` instead of `y`:
+
+`yacc -d {{path/to/grammar_file.y}} -v -b {{prefix}}`