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Revision 3371 - (view) (download) (as text)
| 1 : | dpvc | 2726 | loadMacros("Parser.pl"); |
| 2 : | |||
| 3 : | sub _contextLimitedNumeric_init {}; # don't load it again | ||
| 4 : | |||
| 5 : | ########################################################## | ||
| 6 : | # | ||
| 7 : | # Implements a context in which numbers can be entered, | ||
| 8 : | # but no operations are permitted between them. | ||
| 9 : | # | ||
| 10 : | # There are two versions: one for lists of numbers | ||
| 11 : | # and one for a single number. Select them using | ||
| 12 : | # one of the following commands: | ||
| 13 : | # | ||
| 14 : | # Context("LimitedNumeric-list"); | ||
| 15 : | # Context("LimiteNumeric"); | ||
| 16 : | # | ||
| 17 : | |||
| 18 : | package LimitedNumeric::UOP::minus; | ||
| 19 : | our @ISA = qw(Parser::UOP::minus); | ||
| 20 : | |||
| 21 : | sub _check { | ||
| 22 : | my $self = shift; | ||
| 23 : | $self->SUPER::_check; | ||
| 24 : | my $uop = $self->{def}{string} || $self->{uop}; | ||
| 25 : | dpvc | 3371 | $self->Error("Can't use '%s' in this context",$uop) |
| 26 : | dpvc | 2726 | unless $self->{op}->class eq 'Number'; |
| 27 : | } | ||
| 28 : | |||
| 29 : | package main; | ||
| 30 : | |||
| 31 : | $context{LimitedNumeric} = Context("Numeric"); | ||
| 32 : | $context{LimitedNumeric}->operators->set('u-' => {class => 'LimitedNumeric::UOP::minus'}); | ||
| 33 : | $context{LimitedNumeric}->operators->undefine( | ||
| 34 : | '+', '-', '*', '* ', ' *', ' ', '/', '/ ', ' /', '^', '**', | ||
| 35 : | 'U', '.', '><', 'u+', '!', '_', | ||
| 36 : | ); | ||
| 37 : | $context{LimitedNumeric}->parens->undefine('|','{','(','['); | ||
| 38 : | Parser::Context::Functions::Disable('All'); | ||
| 39 : | |||
| 40 : | $context{'LimitedNumeric-List'} = $context{LimitedNumeric}->copy; | ||
| 41 : | |||
| 42 : | $context{LimitedNumeric}->operators->undefine(','); | ||
| 43 : | |||
| 44 : | Context("LimitedNumeric"); |
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