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tests: check the use of dashes and periods in symbols.

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* tests/input.at (Symbol): New test group.
(cherry picked from commit 746ee38c7c)
This commit is contained in:
Akim Demaille
2009-04-21 22:17:25 +02:00
committed by Joel E. Denny
parent ae618dcca5
commit 0939aa2d3c
2 changed files with 64 additions and 0 deletions
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59
tests/input.at
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@@ -615,6 +615,65 @@ AT_BISON_CHECK([-o input.c input.y])
AT_CLEANUP
## -------------- ##
## Symbol names. ##
## -------------- ##
AT_SETUP([Symbols])
# Bison once thought a character token and its alias were different
# symbols with the same user token number.
AT_DATA_GRAMMAR([input.y],
[[%token WITH-DASH
%token WITHOUT_DASH "WITHOUT-DASH"
%token WITH.PERIOD
%token WITHOUT_PERIOD "WITHOUT.PERIOD"
%%
start: with-dash without_dash with.period without_period;
with-dash: WITH-DASH;
without_dash: "WITHOUT-DASH";
with.period: WITH.PERIOD;
without_period: "WITHOUT.PERIOD";
%%
]])
# POSIX Yacc accept periods, but not dashes.
AT_BISON_CHECK([--yacc input.y], [1], [],
[[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
input.y:14.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
]])
# So warn about them.
AT_BISON_CHECK([-Wyacc input.y], [], [],
[[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
input.y:14.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
]])
# Dashes are fine for GNU Bison.
AT_BISON_CHECK([-o input.c input.y])
# Make sure we don't export silly token identifiers with periods or dashes.
AT_COMPILE([input.o], [-c input.c])
# Period are genuine letters, they can start identifiers. Dashes
# and digits can't.
AT_DATA_GRAMMAR([input.y],
[[%token .good
%token -wrong
%token 1nv4l1d
%%
start: .good
]])
AT_BISON_CHECK([-o input.c input.y], [1], [],
[[input.y:10.8: invalid character: `-'
input.y:11.8: syntax error, unexpected integer, expecting char or identifier or type
]])
AT_CLEANUP
## --------------------- ##
## Unclosed constructs. ##
## --------------------- ##