mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 20:33:03 +00:00
3c36d871fa
From
Example: "if" expr "then" "if" expr "then" stmt • "else" stmt
Shift derivation
if_stmt
↳ "if" expr "then" stmt
↳ if_stmt
↳ "if" expr "then" stmt • "else" stmt
Reduce derivation
if_stmt
↳ "if" expr "then" stmt "else" stmt
↳ if_stmt
↳ "if" expr "then" stmt •
to
Example: "if" expr "then" "if" expr "then" stmt • "else" stmt
Shift derivation
if_stmt
↳ 3: "if" expr "then" stmt
↳ 2: if_stmt
↳ 4: "if" expr "then" stmt • "else" stmt
Example: "if" expr "then" "if" expr "then" stmt • "else" stmt
Reduce derivation
if_stmt
↳ 4: "if" expr "then" stmt "else" stmt
↳ 2: if_stmt
↳ 3: "if" expr "then" stmt •
* src/state-item.h, src/state-item.c (state_item_rule): New.
* src/derivation.h, src/derivation.c (struct derivation): Add a rule
member.
Adjust dependencies.
* src/counterexample.c, src/parse-simulation.c: Pass the rule to
derivation_new.
* src/derivation.c (fprintf_if): New.
(derivation_width, derivation_print_tree_impl): Take the rule number
into account.
* tests/conflicts.at, tests/counterexample.at, tests/diagnostics.at,
* tests/report.at: Adjust.
* doc/bison.texi: Adjust.
14 lines
122 B
Plaintext
14 lines
122 B
Plaintext
%%
|
|
stmt:
|
|
expr
|
|
| if_stmt
|
|
;
|
|
|
|
if_stmt:
|
|
"if" expr "then" stmt
|
|
| "if" expr "then" stmt "else" stmt
|
|
;
|
|
|
|
expr:
|
|
"identifier"
|