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traces: show the stack after reading a token

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Currently, if we have long rules and series of shift, we stack states
without showing stack.  Let's be more incremental, and do how the Java
skeleton does.

* data/skeletons/lalr1.cc, data/skeletons/lalr1.d,
* data/skeletons/yacc.c:
Here.
Adjust test cases.
* tests/torture.at (AT_DATA_STACK_TORTURE): Disable stack traces: this
test produces a very large stack, and showing the stack each time we
shift a token goes quadatric.
This commit is contained in:
Akim Demaille
2020-02-04 07:44:00 +01:00
parent bba2f0a3a0
commit 37aeda6fb3
9 changed files with 45 additions and 4 deletions
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26
tests/actions.at
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@@ -1123,22 +1123,27 @@ AT_PARSER_CHECK([input --debug], 1,
]],
[[Starting parse
Entering state 0
Stack now 0
Reading a token
Next token is token 'a' (1.1: <> printer for 'a' @ 1)
Shifting token 'a' (1.1: <> printer for 'a' @ 1)
Entering state 1
Stack now 0 1
Reading a token
Next token is token 'b' (1.2: 'b'/'c' printer for 'b' @ 2)
Shifting token 'b' (1.2: 'b'/'c' printer for 'b' @ 2)
Entering state 3
Stack now 0 1 3
Reading a token
Next token is token 'c' (1.3: 'b'/'c' printer for 'c' @ 3)
Shifting token 'c' (1.3: 'b'/'c' printer for 'c' @ 3)
Entering state 5
Stack now 0 1 3 5
Reading a token
Next token is token 'd' (1.4: <> printer for 'd' @ 4)
Shifting token 'd' (1.4: <> printer for 'd' @ 4)
Entering state 6
Stack now 0 1 3 5 6
Reading a token
Now at end of input.
1.5: syntax error, unexpected $end, expecting 'e'
@@ -1237,30 +1242,37 @@ AT_PARSER_CHECK([input --debug], 1,
]],
[[Starting parse
Entering state 0
Stack now 0
Reading a token
Next token is token 'a' (<*>/<field2>/e printer)
Shifting token 'a' (<*>/<field2>/e printer)
Entering state 1
Stack now 0 1
Reading a token
Next token is token 'b' (<field1> printer)
Shifting token 'b' (<field1> printer)
Entering state 3
Stack now 0 1 3
Reading a token
Next token is token 'c' ('c' printer)
Shifting token 'c' ('c' printer)
Entering state 5
Stack now 0 1 3 5
Reading a token
Next token is token 'd' ('d' printer)
Shifting token 'd' ('d' printer)
Entering state 6
Stack now 0 1 3 5 6
Reading a token
Next token is token 'e' (<*>/<field2>/e printer)
Shifting token 'e' (<*>/<field2>/e printer)
Entering state 7
Stack now 0 1 3 5 6 7
Reading a token
Next token is token 'f' (<*>/<field2>/e printer)
Shifting token 'f' (<*>/<field2>/e printer)
Entering state 8
Stack now 0 1 3 5 6 7 8
Reading a token
Now at end of input.
syntax error, unexpected $end, expecting 'g'
@@ -1370,15 +1382,18 @@ AT_PARSER_CHECK([input$1 --debug], 0,
]],
[[Starting parse
Entering state 0
Stack now 0
Reducing stack by rule 1 (line 49):
-> $$ = nterm start (1.1: <]]kind[[> for 'S' @ 1)
Stack now 0
Entering state 1
Stack now 0 1
Reading a token
Now at end of input.
Shifting token END (1.1: <]]kind[[> for 'E' @ 1)
Entering state 2
Stack now 0 1 2
Stack now 0 1 2
Cleanup: popping token END (1.1: <]]kind[[> for 'E' @ 1)
Cleanup: popping nterm start (1.1: <]]kind[[> for 'S' @ 1)
]])
@@ -1453,18 +1468,22 @@ AT_COMPILE([input])
AT_PARSER_CHECK([input --debug], [1], [],
[[Starting parse
Entering state 0
Stack now 0
Reading a token
Next token is token 'a' ('a')
Shifting token 'a' ('a')
Entering state 1
Stack now 0 1
Reading a token
Next token is token 'b' ('b')
syntax error
Shifting token error ()
Entering state 3
Stack now 0 1 3
Next token is token 'b' ('b')
Shifting token 'b' ('b')
Entering state 5
Stack now 0 1 3 5
Reading a token
Next token is token $undefined ()
Error: popping token 'b' ('b')
@@ -1474,12 +1493,14 @@ Error: popping token error ()
Stack now 0 1
Shifting token error ()
Entering state 3
Stack now 0 1 3
Next token is token $undefined ()
Error: discarding token $undefined ()
Error: popping token error ()
Stack now 0 1
Shifting token error ()
Entering state 3
Stack now 0 1 3
Reading a token
Now at end of input.
Cleanup: discarding lookahead token $end ()
@@ -1625,22 +1646,27 @@ AT_COMPILE([input])
AT_PARSER_CHECK([input --debug], 1,,
[[Starting parse
Entering state 0
Stack now 0
Reducing stack by rule 1 (line 30):
-> $$ = nterm $@1 (: )
Stack now 0
Entering state 2
Stack now 0 2
Reducing stack by rule 2 (line 31):
-> $$ = nterm @2 (: 2)
Stack now 0 2
Entering state 4
Stack now 0 2 4
Reducing stack by rule 3 (line 32):
-> $$ = nterm @3 (: 3)
Stack now 0 2 4
Entering state 5
Stack now 0 2 4 5
Reducing stack by rule 4 (line 33):
-> $$ = nterm @4 (: 4)
Stack now 0 2 4 5
Entering state 6
Stack now 0 2 4 5 6
Reading a token
Now at end of input.
syntax error