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2019-09-28qapi: Change frontend error messages to start with lower caseMarkus Armbruster
Starting error messages with a capital letter complicates things when text can get interpolated both at the beginning and in the middle of an error message. The next patch will do that. Switch to lower case to keep it simpler. For what it's worth, the GNU Coding Standards advise the message "should not begin with a capital letter when it follows a program name and/or file name, because that isn’t the beginning of a sentence. (The sentence conceptually starts at the beginning of the line.)" While there, avoid breaking lines containing multiple arguments in the middle of an argument. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20190927134639.4284-7-armbru@redhat.com>
2019-09-28qapi: Prefix frontend errors with an "in definition" lineMarkus Armbruster
We take pains to include the offending expression in error messages, e.g. tests/qapi-schema/alternate-any.json:2: alternate 'Alt' member 'one' cannot use type 'any' But not always: tests/qapi-schema/enum-if-invalid.json:2: 'if' condition must be a string or a list of strings Instead of improving them one by one, report the offending expression whenever it is known, like this: tests/qapi-schema/enum-if-invalid.json: In enum 'TestIfEnum': tests/qapi-schema/enum-if-invalid.json:2: 'if' condition must be a string or a list of strings Error messages that mention the offending expression become a bit redundant, e.g. tests/qapi-schema/alternate-any.json: In alternate 'Alt': tests/qapi-schema/alternate-any.json:2: alternate 'Alt' member 'one' cannot use type 'any' I'll take care of that later in this series. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20190927134639.4284-5-armbru@redhat.com>
2019-09-24tests/qapi-schema: Demonstrate misleading optional tag errorMarkus Armbruster
Test flat-union-optional-discriminator declares its union tag as '*switch': 'Enum', and points to it with 'discriminator': '*switch'. This gets rejected as "discriminator of flat union 'MyUnion' uses invalid name '*switch'". Correct; member 'discriminator' doesn't accept a '*' prefix. However, this merely tests name validity checking, which we already cover elsewhere. More interesting is testing the valid name 'switch'. This reports "discriminator 'switch' is not a member of base struct 'Base'", which is misleading. Copy the existing 'discriminator': '*switch' test to flat-union-discriminator-bad-name, and rewrite its comment. Change flat-union-optional-discriminator to test 'discriminator': 'switch', and mark it FIXME. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190914153506.2151-4-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>