# Exercising Bison Grammar Sets. -*- Autotest -*-
-# Copyright 2001 Free Software Foundation, Inc.
+# Copyright (C) 2001, 2002 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
+
+# AT_EXTRACT_SETS(INPUT, OUTPUT)
+# ------------------------------
+# Extract the information about the grammar sets from a bison
+# trace output (INPUT), and save it in OUTPUT.
+# And remember, there is no alternation in portable sed.
+m4_define([AT_EXTRACT_SETS],
+[AT_DATA([extract.sed],
+[[#n
+/^NULLABLE$/ {
+ :null
+ p
+ n
+ /^[ ]*$/! b null
+}
+/^FIRSTS$/ {
+ :firsts
+ p
+ n
+ /^[ ]*$/! b firsts
+}
+/^FDERIVES$/ {
+ :fderiv
+ p
+ n
+ /^[ ]*$/! b fderiv
+}
+/^DERIVES$/ {
+ :deriv
+ p
+ n
+ /^[ ]*$/! b deriv
+}
+]])
+AT_CHECK([sed -f extract.sed $1], 0, [stdout])
+AT_CHECK([mv stdout $2])
+])
+
+
+
AT_BANNER([[Grammar Sets (Firsts etc.).]])
]])
AT_CHECK([[bison --trace input.y]], [], [], [stderr])
-
-AT_CHECK([[sed 's/[ ]*$//' stderr]], [],
-[[RITEM
- e $ (rule 0)
- 'e' (rule 1)
- (rule 2)
-
-
-DERIVES
+AT_EXTRACT_SETS([stderr], [sets])
+AT_CHECK([[cat sets]], [],
+[[DERIVES
$axiom derives
1: e $ (rule 0)
e derives
2: 'e' (rule 1)
3: (rule 2)
-
-
-Entering set_nullable
NULLABLE
$axiom: no
e: yes
-
-
-TC: Input BEGIN
-
- 01
- .--.
- 0| 1|
- 1| |
- `--'
-TC: Input END
-
-TC: Output BEGIN
-
- 01
- .--.
- 0| 1|
- 1| |
- `--'
-TC: Output END
-
FIRSTS
$axiom firsts
4 ($axiom)
5 (e)
e firsts
5 (e)
-
-
FDERIVES
$axiom derives
0: e $
e derives
1: 'e'
2:
-
-
-Processing state 0 (reached by $)
-Closure: input
-
-
-Closure: output
- 0: . e $ (rule 0)
- 3: . 'e' (rule 1)
- 5: . (rule 2)
-
-
-Entering new_itemsets, state = 0
-Entering append_states, state = 0
-Entering get_state, state = 0, symbol = 3 ('e')
-Entering new_state, state = 0, symbol = 3 ('e')
-Exiting get_state => 1
-Entering get_state, state = 0, symbol = 5 (e)
-Entering new_state, state = 0, symbol = 5 (e)
-Exiting get_state => 2
-Processing state 1 (reached by 'e')
-Closure: input
- 4: . (rule 1)
-
-
-Closure: output
- 4: . (rule 1)
-
-
-Entering new_itemsets, state = 1
-Entering append_states, state = 1
-Processing state 2 (reached by e)
-Closure: input
- 1: . $ (rule 0)
-
-
-Closure: output
- 1: . $ (rule 0)
-
-
-Entering new_itemsets, state = 2
-Entering append_states, state = 2
-Entering get_state, state = 2, symbol = 0 ($)
-Entering new_state, state = 2, symbol = 0 ($)
-Exiting get_state => 3
-Processing state 3 (reached by $)
-Closure: input
- 2: . (rule 0)
-
-
-Closure: output
- 2: . (rule 0)
-
-
-Entering new_itemsets, state = 3
-Entering append_states, state = 3
-transpose: input
- 0:
-
-transpose: output
- 0:
-
-Lookaheads: BEGIN
-State 0: 1 lookaheads
- on 0 ($) -> rule -4
- on 1 (error) -> rule -4
- on 2 ($undefined.) -> rule -4
- on 3 ('e') -> rule -4
-State 1: 0 lookaheads
-State 2: 0 lookaheads
-State 3: 0 lookaheads
-Lookaheads: END
]])
AT_CLEANUP
AT_DATA([input.y],
[[%%
-a: b
-b: c
-c: d
-d: e
-e: f
-f: g
-g: h
-h: 'h'
+a: b;
+b: c;
+c: d;
+d: e;
+e: f;
+f: g;
+g: h;
+h: 'h';
]])
AT_CHECK([[bison --trace input.y]], [], [], [stderr])
-AT_CHECK([[sed -n 's/[ ]*$//;/^TC: Output BEGIN/,/^TC: Output END/p' stderr]], [],
-[[TC: Output BEGIN
+AT_CHECK([[sed -n 's/[ ]*$//;/^RTC: Output BEGIN/,/^RTC: Output END/p' stderr]], [],
+[[RTC: Output BEGIN
012345678
.---------.
- 0| 11111111|
- 1| 1111111|
- 2| 111111|
- 3| 11111|
- 4| 1111|
- 5| 111|
- 6| 11|
- 7| 1|
- 8| |
+ 0|111111111|
+ 1| 11111111|
+ 2| 1111111|
+ 3| 111111|
+ 4| 11111|
+ 5| 1111|
+ 6| 111|
+ 7| 11|
+ 8| 1|
`---------'
-TC: Output END
+RTC: Output END
+]])
+
+AT_CLEANUP
+
+
+
+## -------- ##
+## Firsts. ##
+## -------- ##
+
+AT_SETUP([Firsts])
+
+AT_DATA([input.y],
+[[%nonassoc '<' '>'
+%left '+' '-'
+%right '^' '='
+%%
+exp:
+ exp '<' exp
+ | exp '>' exp
+ | exp '+' exp
+ | exp '-' exp
+ | exp '^' exp
+ | exp '=' exp
+ | "exp"
+ ;
+]])
+
+AT_CHECK([[bison --trace input.y]], [], [], [stderr])
+AT_EXTRACT_SETS([stderr], [sets])
+AT_CHECK([[cat sets]], [],
+[[DERIVES
+ $axiom derives
+ 1: exp $ (rule 0)
+ exp derives
+ 2: exp '<' exp (rule 1)
+ 3: exp '>' exp (rule 2)
+ 4: exp '+' exp (rule 3)
+ 5: exp '-' exp (rule 4)
+ 6: exp '^' exp (rule 5)
+ 7: exp '=' exp (rule 6)
+ 8: "exp" (rule 7)
+NULLABLE
+ $axiom: no
+ exp: no
+FIRSTS
+ $axiom firsts
+ 10 ($axiom)
+ 11 (exp)
+ exp firsts
+ 11 (exp)
+FDERIVES
+ $axiom derives
+ 0: exp $
+ 1: exp '<' exp
+ 2: exp '>' exp
+ 3: exp '+' exp
+ 4: exp '-' exp
+ 5: exp '^' exp
+ 6: exp '=' exp
+ 7: "exp"
+ exp derives
+ 1: exp '<' exp
+ 2: exp '>' exp
+ 3: exp '+' exp
+ 4: exp '-' exp
+ 5: exp '^' exp
+ 6: exp '=' exp
+ 7: "exp"
]])
AT_CLEANUP
projects / bison.git / blobdiff