aboutsummaryrefslogtreecommitdiff
path: root/tests
diff options
context:
space:
mode:
authorMarkus Armbruster <armbru@redhat.com>2013-07-27 17:41:55 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2013-07-29 10:37:10 -0500
commitc7a3f25200c8692e969f21c7f2555630ec0d0d30 (patch)
tree0459696448aa85b4bf8144cea1fa6385bca35c6b /tests
parent4f193e34c6c41abdd06c134e584312077def2bda (diff)
downloadqemu-c7a3f25200c8692e969f21c7f2555630ec0d0d30.zip
qemu-c7a3f25200c8692e969f21c7f2555630ec0d0d30.tar.gz
qemu-c7a3f25200c8692e969f21c7f2555630ec0d0d30.tar.bz2
qapi.py: Restructure lexer and parser
The parser has a rather unorthodox structure: Until EOF: Read a section: Generator function get_expr() yields one section after the other, as a string. An unindented, non-empty line that isn't a comment starts a new section. Lexing: Split section into a list of tokens (strings), with help of generator function tokenize(). Parsing: Parse the first expression from the list of tokens, with parse(), throw away any remaining tokens. In parse_schema(): record value of an enum, union or struct key (if any) in the appropriate global table, append expression to the list of expressions. Return list of expressions. Known issues: (1) Indentation is significant, unlike in real JSON. (2) Neither lexer nor parser have any idea of source positions. Error reporting is hard, let's go shopping. (3) The one error we bother to detect, we "report" via raise. (4) The lexer silently ignores invalid characters. (5) If everything in a section gets ignored, the parser crashes. (6) The lexer treats a string containing a structural character exactly like the structural character. (7) Tokens trailing the first expression in a section are silently ignored. (8) The parser accepts any token in place of a colon. (9) The parser treats comma as optional. (10) parse() crashes on unexpected EOF. (11) parse_schema() crashes when a section's expression isn't a JSON object. Replace this piece of original art by a thoroughly unoriginal design. Takes care of (1), (2), (5), (6) and (7), and lays the groundwork for addressing the others. Generated source files remain unchanged. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1374939721-7876-4-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'tests')
-rw-r--r--tests/qapi-schema/indented-expr.out2
-rw-r--r--tests/qapi-schema/missing-colon.out4
-rw-r--r--tests/qapi-schema/quoted-structural-chars.err1
-rw-r--r--tests/qapi-schema/quoted-structural-chars.exit2
-rw-r--r--tests/qapi-schema/quoted-structural-chars.out3
5 files changed, 5 insertions, 7 deletions
diff --git a/tests/qapi-schema/indented-expr.out b/tests/qapi-schema/indented-expr.out
index 98ae692..98af89a 100644
--- a/tests/qapi-schema/indented-expr.out
+++ b/tests/qapi-schema/indented-expr.out
@@ -1,3 +1,3 @@
-[OrderedDict([('id', 'eins')])]
+[OrderedDict([('id', 'eins')]), OrderedDict([('id', 'zwei')])]
[]
[]
diff --git a/tests/qapi-schema/missing-colon.out b/tests/qapi-schema/missing-colon.out
index 50f827e..e67068c 100644
--- a/tests/qapi-schema/missing-colon.out
+++ b/tests/qapi-schema/missing-colon.out
@@ -1,3 +1,3 @@
-[OrderedDict([('enum', ','), ('data', ['good', 'bad', 'ugly'])])]
-[',']
+[OrderedDict([('enum', None), ('data', ['good', 'bad', 'ugly'])])]
+[None]
[]
diff --git a/tests/qapi-schema/quoted-structural-chars.err b/tests/qapi-schema/quoted-structural-chars.err
index e69de29..48c849d 100644
--- a/tests/qapi-schema/quoted-structural-chars.err
+++ b/tests/qapi-schema/quoted-structural-chars.err
@@ -0,0 +1 @@
+Crashed: <type 'exceptions.AttributeError'>
diff --git a/tests/qapi-schema/quoted-structural-chars.exit b/tests/qapi-schema/quoted-structural-chars.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/quoted-structural-chars.exit
+++ b/tests/qapi-schema/quoted-structural-chars.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/quoted-structural-chars.out b/tests/qapi-schema/quoted-structural-chars.out
index 85405be..e69de29 100644
--- a/tests/qapi-schema/quoted-structural-chars.out
+++ b/tests/qapi-schema/quoted-structural-chars.out
@@ -1,3 +0,0 @@
-[OrderedDict([('key1', 'value1'), ('key2', [])])]
-[]
-[]