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Annotation of 43BSDReno/share/doc/usd/25.trofftut/tt07, revision 1.1

1.1     ! root        1: .\"    @(#)tt07        6.1 (Berkeley) 5/23/86
        !             2: .\"
        !             3: .NH
        !             4: Strings
        !             5: .PP
        !             6: Obviously if a paper contains a large number of occurrences
        !             7: of an acute accent over a letter `e',
        !             8: typing
        !             9: .BD \eo"e\e\'"
        !            10: for each \*e
        !            11: would be a great nuisance.
        !            12: .PP
        !            13: Fortunately,
        !            14: .UL troff
        !            15: provides a way in which you can store an arbitrary
        !            16: collection of text in a `string',
        !            17: and thereafter use the string name as a shorthand
        !            18: for its contents.
        !            19: Strings are one of several
        !            20: .UL troff
        !            21: mechanisms whose judicious use
        !            22: lets you type a document
        !            23: with less effort and organize
        !            24: it
        !            25: so that extensive format changes
        !            26: can be made with few editing changes.
        !            27: .PP
        !            28: A reference to a string is replaced by whatever
        !            29: text
        !            30: the string was defined as.
        !            31: Strings are defined with the command
        !            32: .BD .ds .
        !            33: The line
        !            34: .P1
        !            35: \&^ds e \eo"e\e'"
        !            36: .P2
        !            37: defines the string
        !            38: .BD e
        !            39: to have the value
        !            40: .BD \eo"e\e\'"
        !            41: .PP
        !            42: String names may be either one or two characters long,
        !            43: and are referred to by
        !            44: .BD \e*x
        !            45: for one character names or
        !            46: .BD \e*(xy
        !            47: for two character names.
        !            48: Thus to get
        !            49: t\*el\*ephone,
        !            50: given the definition of the string
        !            51: .BD e
        !            52: as above,
        !            53: we can say
        !            54: t\e*el\e*ephone.
        !            55: .PP
        !            56: If a string must begin with blanks, define it as
        !            57: .P1
        !            58: \&.ds xx "      text
        !            59: .P2
        !            60: The double quote signals the beginning of the definition.
        !            61: There is no trailing quote;
        !            62: the end of the line terminates the string.
        !            63: .PP
        !            64: A string may actually be several lines long;
        !            65: if
        !            66: .UL troff
        !            67: encounters a 
        !            68: .BD \e
        !            69: at the end of
        !            70: .ul
        !            71: any
        !            72: line, it is thrown away and the next line
        !            73: added to the current one.
        !            74: So you can make a long string simply by ending each line
        !            75: but the last with a backslash:
        !            76: .P1
        !            77: \&^ds xx this \e
        !            78: is a very \e
        !            79: long string
        !            80: .P2
        !            81: .PP
        !            82: Strings may be defined in terms of other strings, or even in terms of themselves;
        !            83: we will discuss some of these possibilities later.

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