author | wenzelm |
Sat, 04 Dec 2010 15:14:28 +0100 | |
changeset 40958 | 755f8fe7ced9 |
parent 40627 | becf5d5187cc |
child 42290 | b1f544c84040 |
permissions | -rw-r--r-- |
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1 |
(* Title: Pure/Isar/token.ML |
5825 | 2 |
Author: Markus Wenzel, TU Muenchen |
3 |
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4 |
Outer token syntax for Isabelle/Isar. |
5825 | 5 |
*) |
6 |
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7 |
signature TOKEN = |
5825 | 8 |
sig |
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9 |
datatype kind = |
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Command | Keyword | Ident | LongIdent | SymIdent | Var | TypeIdent | TypeVar | |
40290
47f572aff50a
support for floating-point tokens in outer syntax (coinciding with inner syntax version);
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11 |
Nat | Float | String | AltString | Verbatim | Space | Comment | InternalValue | |
40958
755f8fe7ced9
eliminated obsolete Token.Malformed -- subsumed by Token.Error;
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12 |
Error of string | Sync | EOF |
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datatype value = |
14 |
Text of string | Typ of typ | Term of term | Fact of thm list | |
|
15 |
Attribute of morphism -> attribute |
|
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16 |
type T |
f5417836dbea
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17 |
val str_of_kind: kind -> string |
f5417836dbea
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18 |
val position_of: T -> Position.T |
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19 |
val end_position_of: T -> Position.T |
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20 |
val pos_of: T -> string |
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21 |
val eof: T |
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22 |
val is_eof: T -> bool |
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23 |
val not_eof: T -> bool |
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24 |
val not_sync: T -> bool |
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25 |
val stopper: T Scan.stopper |
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26 |
val kind_of: T -> kind |
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val is_kind: kind -> T -> bool |
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val keyword_with: (string -> bool) -> T -> bool |
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29 |
val ident_with: (string -> bool) -> T -> bool |
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val is_proper: T -> bool |
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val is_semicolon: T -> bool |
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32 |
val is_comment: T -> bool |
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val is_begin_ignore: T -> bool |
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val is_end_ignore: T -> bool |
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val is_blank: T -> bool |
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val is_newline: T -> bool |
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37 |
val source_of: T -> string |
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38 |
val source_position_of: T -> Symbol_Pos.text * Position.T |
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39 |
val content_of: T -> string |
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40 |
val unparse: T -> string |
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41 |
val text_of: T -> string * string |
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42 |
val get_value: T -> value option |
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43 |
val map_value: (value -> value) -> T -> T |
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44 |
val mk_text: string -> T |
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45 |
val mk_typ: typ -> T |
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46 |
val mk_term: term -> T |
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47 |
val mk_fact: thm list -> T |
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48 |
val mk_attribute: (morphism -> attribute) -> T |
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val assignable: T -> T |
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val assign: value option -> T -> unit |
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val closure: T -> T |
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val ident_or_symbolic: string -> bool |
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val !!! : string -> (Symbol_Pos.T list -> 'a) -> Symbol_Pos.T list -> 'a |
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val source_proper: (T, 'a) Source.source -> (T, (T, 'a) Source.source) Source.source |
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Symbol.source/OuterLex.source: more explicit do_recover argument;
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55 |
val source': {do_recover: bool Option.option} -> (unit -> Scan.lexicon * Scan.lexicon) -> |
36959
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(Symbol_Pos.T, 'a) Source.source -> (T, (Symbol_Pos.T, 'a) Source.source) Source.source |
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Symbol.source/OuterLex.source: more explicit do_recover argument;
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val source: {do_recover: bool Option.option} -> (unit -> Scan.lexicon * Scan.lexicon) -> |
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Position.T -> (Symbol.symbol, 'a) Source.source -> (T, |
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(Symbol_Pos.T, Position.T * (Symbol.symbol, 'a) Source.source) Source.source) Source.source |
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val read_antiq: Scan.lexicon -> (T list -> 'a * T list) -> Symbol_Pos.T list * Position.T -> 'a |
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end; |
62 |
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63 |
structure Token: TOKEN = |
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struct |
65 |
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(** tokens **) |
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67 |
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(* token values *) |
69 |
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(*The value slot assigns an (optional) internal value to a token, |
|
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usually as a side-effect of special scanner setup (see also |
|
72 |
args.ML). Note that an assignable ref designates an intermediate |
|
73 |
state of internalization -- it is NOT meant to persist.*) |
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datatype value = |
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Text of string | |
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Typ of typ | |
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Term of term | |
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Fact of thm list | |
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Attribute of morphism -> attribute; |
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81 |
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datatype slot = |
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Slot | |
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Value of value option | |
|
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Assignable of value option Unsynchronized.ref; |
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87 |
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(* datatype token *) |
89 |
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90 |
datatype kind = |
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Command | Keyword | Ident | LongIdent | SymIdent | Var | TypeIdent | TypeVar | |
40290
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support for floating-point tokens in outer syntax (coinciding with inner syntax version);
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parents:
38229
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changeset
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92 |
Nat | Float | String | AltString | Verbatim | Space | Comment | InternalValue | |
40958
755f8fe7ced9
eliminated obsolete Token.Malformed -- subsumed by Token.Error;
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93 |
Error of string | Sync | EOF; |
5825 | 94 |
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95 |
datatype T = Token of (Symbol_Pos.text * Position.range) * (kind * string) * slot; |
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|
97 |
val str_of_kind = |
|
7026 | 98 |
fn Command => "command" |
99 |
| Keyword => "keyword" |
|
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| Ident => "identifier" |
101 |
| LongIdent => "long identifier" |
|
102 |
| SymIdent => "symbolic identifier" |
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| Var => "schematic variable" |
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104 |
| TypeIdent => "type variable" |
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| TypeVar => "schematic type variable" |
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106 |
| Nat => "natural number" |
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107 |
| Float => "floating-point number" |
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| String => "string" |
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109 |
| AltString => "back-quoted string" |
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| Verbatim => "verbatim text" |
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added Space, Comment token kinds (keep actual text);
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111 |
| Space => "white space" |
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added Space, Comment token kinds (keep actual text);
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112 |
| Comment => "comment text" |
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| InternalValue => "internal value" |
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separated Malformed (symbolic char) from Error (bad input);
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114 |
| Error _ => "bad input" |
23788
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Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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115 |
| Sync => "sync marker" |
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| EOF => "end-of-file"; |
117 |
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118 |
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119 |
(* position *) |
5825 | 120 |
|
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fun position_of (Token ((_, (pos, _)), _, _)) = pos; |
122 |
fun end_position_of (Token ((_, (_, pos)), _, _)) = pos; |
|
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|
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val pos_of = Position.str_of o position_of; |
125 |
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126 |
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abstract type Scan.stopper, position taken from last input token;
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127 |
(* control tokens *) |
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128 |
|
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fun mk_eof pos = Token (("", (pos, Position.none)), (EOF, ""), Slot); |
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130 |
val eof = mk_eof Position.none; |
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131 |
|
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fun is_eof (Token (_, (EOF, _), _)) = true |
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133 |
| is_eof _ = false; |
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abstract type Scan.stopper, position taken from last input token;
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134 |
|
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135 |
val not_eof = not o is_eof; |
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136 |
|
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fun not_sync (Token (_, (Sync, _), _)) = false |
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138 |
| not_sync _ = true; |
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abstract type Scan.stopper, position taken from last input token;
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139 |
|
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140 |
val stopper = |
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141 |
Scan.stopper (fn [] => eof | toks => mk_eof (end_position_of (List.last toks))) is_eof; |
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abstract type Scan.stopper, position taken from last input token;
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142 |
|
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143 |
|
5825 | 144 |
(* kind of token *) |
145 |
||
27814 | 146 |
fun kind_of (Token (_, (k, _), _)) = k; |
147 |
fun is_kind k (Token (_, (k', _), _)) = k = k'; |
|
5825 | 148 |
|
27814 | 149 |
fun keyword_with pred (Token (_, (Keyword, x), _)) = pred x |
7026 | 150 |
| keyword_with _ _ = false; |
5825 | 151 |
|
27814 | 152 |
fun ident_with pred (Token (_, (Ident, x), _)) = pred x |
16029 | 153 |
| ident_with _ _ = false; |
154 |
||
27814 | 155 |
fun is_proper (Token (_, (Space, _), _)) = false |
156 |
| is_proper (Token (_, (Comment, _), _)) = false |
|
5825 | 157 |
| is_proper _ = true; |
158 |
||
27814 | 159 |
fun is_semicolon (Token (_, (Keyword, ";"), _)) = true |
9130 | 160 |
| is_semicolon _ = false; |
161 |
||
27814 | 162 |
fun is_comment (Token (_, (Comment, _), _)) = true |
17069 | 163 |
| is_comment _ = false; |
164 |
||
27814 | 165 |
fun is_begin_ignore (Token (_, (Comment, "<"), _)) = true |
8580 | 166 |
| is_begin_ignore _ = false; |
167 |
||
27814 | 168 |
fun is_end_ignore (Token (_, (Comment, ">"), _)) = true |
8580 | 169 |
| is_end_ignore _ = false; |
170 |
||
8651 | 171 |
|
17069 | 172 |
(* blanks and newlines -- space tokens obey lines *) |
8651 | 173 |
|
27814 | 174 |
fun is_blank (Token (_, (Space, x), _)) = not (String.isSuffix "\n" x) |
17069 | 175 |
| is_blank _ = false; |
176 |
||
27814 | 177 |
fun is_newline (Token (_, (Space, x), _)) = String.isSuffix "\n" x |
8651 | 178 |
| is_newline _ = false; |
179 |
||
5825 | 180 |
|
14991 | 181 |
(* token content *) |
9155 | 182 |
|
27814 | 183 |
fun source_of (Token ((source, (pos, _)), _, _)) = |
38229 | 184 |
YXML.string_of (XML.Elem (Markup.token (Position.properties_of pos), [XML.Text source])); |
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text_of: made even more robust against recurrent errors;
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185 |
|
27885 | 186 |
fun source_position_of (Token ((source, (pos, _)), _, _)) = (source, pos); |
27873 | 187 |
|
27814 | 188 |
fun content_of (Token (_, (_, x), _)) = x; |
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token: maintain of source, which retains original position information;
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189 |
|
d41abb7bc08a
token: maintain of source, which retains original position information;
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190 |
|
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token: maintain of source, which retains original position information;
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191 |
(* unparse *) |
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192 |
|
18547 | 193 |
fun escape q = |
194 |
implode o map (fn s => if s = q orelse s = "\\" then "\\" ^ s else s) o Symbol.explode; |
|
195 |
||
27814 | 196 |
fun unparse (Token (_, (kind, x), _)) = |
14991 | 197 |
(case kind of |
18547 | 198 |
String => x |> quote o escape "\"" |
199 |
| AltString => x |> enclose "`" "`" o escape "`" |
|
14991 | 200 |
| Verbatim => x |> enclose "{*" "*}" |
201 |
| Comment => x |> enclose "(*" "*)" |
|
23729
d1ba656978c5
separated Malformed (symbolic char) from Error (bad input);
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202 |
| Sync => "" |
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separated Malformed (symbolic char) from Error (bad input);
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diff
changeset
|
203 |
| EOF => "" |
14991 | 204 |
| _ => x); |
205 |
||
23788
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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diff
changeset
|
206 |
fun text_of tok = |
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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diff
changeset
|
207 |
if is_semicolon tok then ("terminator", "") |
23729
d1ba656978c5
separated Malformed (symbolic char) from Error (bad input);
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parents:
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changeset
|
208 |
else |
23788
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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changeset
|
209 |
let |
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
wenzelm
parents:
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diff
changeset
|
210 |
val k = str_of_kind (kind_of tok); |
40523
1050315f6ee2
simplified/robustified treatment of malformed symbols, which are now fully internalized (total Symbol.explode etc.);
wenzelm
parents:
40290
diff
changeset
|
211 |
val s = unparse tok; |
23788
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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diff
changeset
|
212 |
in |
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
23729
diff
changeset
|
213 |
if s = "" then (k, "") |
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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diff
changeset
|
214 |
else if size s < 40 andalso not (exists_string (fn c => c = "\n") s) then (k ^ " " ^ s, "") |
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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diff
changeset
|
215 |
else (k, s) |
54ce229dc858
Symbol.not_eof/sync is superceded by Symbol.is_regular (rules out further control symbols);
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parents:
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diff
changeset
|
216 |
end; |
23729
d1ba656978c5
separated Malformed (symbolic char) from Error (bad input);
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parents:
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diff
changeset
|
217 |
|
5825 | 218 |
|
219 |
||
27814 | 220 |
(** associated values **) |
221 |
||
222 |
(* access values *) |
|
223 |
||
224 |
fun get_value (Token (_, _, Value v)) = v |
|
225 |
| get_value _ = NONE; |
|
226 |
||
227 |
fun map_value f (Token (x, y, Value (SOME v))) = Token (x, y, Value (SOME (f v))) |
|
228 |
| map_value _ tok = tok; |
|
229 |
||
230 |
||
231 |
(* make values *) |
|
232 |
||
233 |
fun mk_value k v = Token ((k, Position.no_range), (InternalValue, k), Value (SOME v)); |
|
234 |
||
235 |
val mk_text = mk_value "<text>" o Text; |
|
236 |
val mk_typ = mk_value "<typ>" o Typ; |
|
237 |
val mk_term = mk_value "<term>" o Term; |
|
238 |
val mk_fact = mk_value "<fact>" o Fact; |
|
239 |
val mk_attribute = mk_value "<attribute>" o Attribute; |
|
240 |
||
241 |
||
242 |
(* static binding *) |
|
243 |
||
244 |
(*1st stage: make empty slots assignable*) |
|
32738 | 245 |
fun assignable (Token (x, y, Slot)) = Token (x, y, Assignable (Unsynchronized.ref NONE)) |
27814 | 246 |
| assignable tok = tok; |
247 |
||
248 |
(*2nd stage: assign values as side-effect of scanning*) |
|
249 |
fun assign v (Token (_, _, Assignable r)) = r := v |
|
250 |
| assign _ _ = (); |
|
251 |
||
252 |
(*3rd stage: static closure of final values*) |
|
32738 | 253 |
fun closure (Token (x, y, Assignable (Unsynchronized.ref v))) = Token (x, y, Value v) |
27814 | 254 |
| closure tok = tok; |
255 |
||
256 |
||
257 |
||
5825 | 258 |
(** scanners **) |
259 |
||
30573 | 260 |
open Basic_Symbol_Pos; |
5825 | 261 |
|
30573 | 262 |
fun !!! msg = Symbol_Pos.!!! ("Outer lexical error: " ^ msg); |
5825 | 263 |
|
264 |
||
265 |
(* scan symbolic idents *) |
|
266 |
||
40627
becf5d5187cc
renamed raw "explode" function to "raw_explode" to emphasize its meaning;
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parents:
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diff
changeset
|
267 |
val is_sym_char = member (op =) (raw_explode "!#$%&*+-/<=>?@^_|~"); |
5825 | 268 |
|
8231 | 269 |
val scan_symid = |
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40523
diff
changeset
|
270 |
Scan.many1 (is_sym_char o Symbol_Pos.symbol) || |
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
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parents:
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diff
changeset
|
271 |
Scan.one (Symbol.is_symbolic o Symbol_Pos.symbol) >> single; |
5825 | 272 |
|
8231 | 273 |
fun is_symid str = |
274 |
(case try Symbol.explode str of |
|
15531 | 275 |
SOME [s] => Symbol.is_symbolic s orelse is_sym_char s |
276 |
| SOME ss => forall is_sym_char ss |
|
8231 | 277 |
| _ => false); |
278 |
||
27814 | 279 |
fun ident_or_symbolic "begin" = false |
280 |
| ident_or_symbolic ":" = true |
|
281 |
| ident_or_symbolic "::" = true |
|
282 |
| ident_or_symbolic s = Syntax.is_identifier s orelse is_symid s; |
|
5825 | 283 |
|
284 |
||
285 |
(* scan verbatim text *) |
|
286 |
||
287 |
val scan_verb = |
|
27769 | 288 |
$$$ "*" --| Scan.ahead (~$$$ "}") || |
289 |
Scan.one (fn (s, _) => s <> "*" andalso Symbol.is_regular s) >> single; |
|
5825 | 290 |
|
291 |
val scan_verbatim = |
|
30573 | 292 |
(Symbol_Pos.scan_pos --| $$$ "{" --| $$$ "*") -- !!! "missing end of verbatim text" |
30586
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
293 |
(Symbol_Pos.change_prompt |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
294 |
((Scan.repeat scan_verb >> flat) -- ($$$ "*" |-- $$$ "}" |-- Symbol_Pos.scan_pos))); |
5825 | 295 |
|
296 |
||
297 |
(* scan space *) |
|
298 |
||
19305 | 299 |
fun is_space s = Symbol.is_blank s andalso s <> "\n"; |
5825 | 300 |
|
301 |
val scan_space = |
|
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40523
diff
changeset
|
302 |
Scan.many1 (is_space o Symbol_Pos.symbol) @@@ Scan.optional ($$$ "\n") [] || |
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40523
diff
changeset
|
303 |
Scan.many (is_space o Symbol_Pos.symbol) @@@ $$$ "\n"; |
5825 | 304 |
|
305 |
||
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
306 |
(* scan comment *) |
5825 | 307 |
|
308 |
val scan_comment = |
|
30573 | 309 |
Symbol_Pos.scan_pos -- (Symbol_Pos.scan_comment_body !!! -- Symbol_Pos.scan_pos); |
5825 | 310 |
|
311 |
||
27663 | 312 |
|
27769 | 313 |
(** token sources **) |
5825 | 314 |
|
27769 | 315 |
fun source_proper src = src |> Source.filter is_proper; |
5825 | 316 |
|
23678 | 317 |
local |
318 |
||
27769 | 319 |
fun token_leq ((_, syms1), (_, syms2)) = length syms1 <= length syms2; |
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
320 |
|
27799 | 321 |
fun token k ss = |
30573 | 322 |
Token ((Symbol_Pos.implode ss, Symbol_Pos.range ss), (k, Symbol_Pos.untabify_content ss), Slot); |
27799 | 323 |
|
324 |
fun token_range k (pos1, (ss, pos2)) = |
|
30573 | 325 |
Token (Symbol_Pos.implode_range pos1 pos2 ss, (k, Symbol_Pos.untabify_content ss), Slot); |
23678 | 326 |
|
27769 | 327 |
fun scan (lex1, lex2) = !!! "bad input" |
30586
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
328 |
(Symbol_Pos.scan_string >> token_range String || |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
329 |
Symbol_Pos.scan_alt_string >> token_range AltString || |
27799 | 330 |
scan_verbatim >> token_range Verbatim || |
331 |
scan_comment >> token_range Comment || |
|
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
332 |
scan_space >> token Space || |
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40523
diff
changeset
|
333 |
Scan.one (Symbol.is_sync o Symbol_Pos.symbol) >> (token Sync o single) || |
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
334 |
(Scan.max token_leq |
27769 | 335 |
(Scan.max token_leq |
336 |
(Scan.literal lex2 >> pair Command) |
|
337 |
(Scan.literal lex1 >> pair Keyword)) |
|
338 |
(Syntax.scan_longid >> pair LongIdent || |
|
339 |
Syntax.scan_id >> pair Ident || |
|
340 |
Syntax.scan_var >> pair Var || |
|
341 |
Syntax.scan_tid >> pair TypeIdent || |
|
342 |
Syntax.scan_tvar >> pair TypeVar || |
|
40290
47f572aff50a
support for floating-point tokens in outer syntax (coinciding with inner syntax version);
wenzelm
parents:
38229
diff
changeset
|
343 |
Syntax.scan_float >> pair Float || |
27769 | 344 |
Syntax.scan_nat >> pair Nat || |
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
345 |
scan_symid >> pair SymIdent) >> uncurry token)); |
27769 | 346 |
|
347 |
fun recover msg = |
|
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40523
diff
changeset
|
348 |
Scan.many ((Symbol.is_regular andf (not o Symbol.is_blank)) o Symbol_Pos.symbol) |
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
349 |
>> (single o token (Error msg)); |
23678 | 350 |
|
351 |
in |
|
5825 | 352 |
|
27835
ff8b8513965a
Symbol.source/OuterLex.source: more explicit do_recover argument;
wenzelm
parents:
27814
diff
changeset
|
353 |
fun source' {do_recover} get_lex = |
30573 | 354 |
Source.source Symbol_Pos.stopper (Scan.bulk (fn xs => scan (get_lex ()) xs)) |
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
355 |
(Option.map (rpair recover) do_recover); |
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
356 |
|
5825 | 357 |
fun source do_recover get_lex pos src = |
30573 | 358 |
Symbol_Pos.source pos src |
27780
7d0910f662f7
more precise positions due to SymbolsPos.implode_delim;
wenzelm
parents:
27769
diff
changeset
|
359 |
|> source' do_recover get_lex; |
23678 | 360 |
|
361 |
end; |
|
5825 | 362 |
|
30586
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
363 |
|
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
364 |
(* read_antiq *) |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
365 |
|
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
366 |
fun read_antiq lex scan (syms, pos) = |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
367 |
let |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
368 |
fun err msg = cat_error msg ("Malformed antiquotation" ^ Position.str_of pos ^ ":\n" ^ |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
369 |
"@{" ^ Symbol_Pos.content syms ^ "}"); |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
370 |
|
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
371 |
val res = |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
372 |
Source.of_list syms |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
373 |
|> source' {do_recover = NONE} (K (lex, Scan.empty_lexicon)) |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
374 |
|> source_proper |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
375 |
|> Source.source stopper (Scan.error (Scan.bulk scan)) NONE |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
376 |
|> Source.exhaust; |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
377 |
in (case res of [x] => x | _ => err "") handle ERROR msg => err msg end; |
9674f64a0702
moved basic change_prompt, scan_string, scan_alt_string, scan_quoted to symbol_pos.ML;
wenzelm
parents:
30573
diff
changeset
|
378 |
|
5825 | 379 |
end; |