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+Shellcheck directives allows selectively silencing warnings, and takes the form of comments in files:
+
+    hexToAscii() {
+      # shellcheck disable=SC2059
+      printf "\x$1"
+    }
+
+The only supported directive is `disable`:
+
+    # shellcheck disable=code[,code...]
+
+Directives are scoped to the structure that follows it. For example, before a function it silences all warnings in the function. Before a case statement, it silences all warnings.
+
+Silencing parser errors is purely cosmetic, and will not make ShellCheck continue.
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