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https://github.com/EiffelSoftware/eiffel-org.git
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Author:halw
Date:2009-09-27T22:07:15.000000Z git-svn-id: https://svn.eiffel.com/eiffel-org/trunk@308 abb3cda0-5349-4a8f-a601-0c33ac3a8c38
This commit is contained in:
halw
@@ -0,0 +1,209 @@
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[[Property:title|Eiffel language reserved words]]
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[[Property:link_title|Eiffel programming language reserved words]]
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[[Property:weight|1]]
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[[Property:uuid|047ce062-45de-f25c-f356-ee8ec0fc2d1d]]
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In the Eiffel language, there are certain words that are considered "reserved". These words have specific meanings recognized by the compiler. As such, it is invalid to attempt to use a reserved word as an ordinary language identifier.
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The reserved words listed in the ISO/ECMA standard are show below with a brief explanation of their meanings.
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==Reserved words==
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===agent===
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Used to specify an [[ET: Agents|agent]].
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:[[Eiffel language syntax#Agents|Syntax.]]
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===alias===
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Used to identify an alternative or alias feature name.
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:[[Eiffel language syntax#Feature names|Syntax.]]
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[[ET: The Dynamic Structure: Execution Model#Infix and prefix notations|Usage for infix/prefix notations.]]
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[[ET: The Static Picture: System Organization#External software|Usage in interfaces to external software.]]
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:[[Eiffel language syntax#External routines|Syntax.]]
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===all===
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Used in [[ET: Inheritance#Changing the export status|export adaptation]] to indicate that a chosen export status applies to all features inherited from a given parent.
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:[[Eiffel language syntax#Export adaptation|Syntax.]]
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===and===
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The logical conjunction [[Eiffel language syntax#Operators|operator]]. Strict when used alone, nonstrict when used with [[#then|then]].
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===as===
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===assign===
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===attribute===
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===check===
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===class===
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===convert===
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===create===
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===Current===
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===debug===
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===deferred===
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===do===
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===else===
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===elseif===
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===end===
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===ensure===
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===expanded===
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===export===
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===external===
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===False===
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===feature===
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===from===
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===frozen===
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===if===
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===implies===
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===inherit===
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===inspect===
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===invariant===
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===like===
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===local===
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===loop===
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===not===
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===note===
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===obsolete===
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===old===
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===once===
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===only===
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===or===
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===Precursor===
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===redefine===
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===rename===
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===require===
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===rescue===
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|
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===Result===
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===retry===
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===select===
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===separate===
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===then===
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===True===
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===TUPLE===
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===undefine===
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===until===
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===variant===
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===Void===
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===when===
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===xor===
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@@ -1,4 +1,4 @@
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[[Property:title|Eiffel syntax specification]]
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[[Property:title|Eiffel language syntax]]
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[[Property:link_title|Eiffel programming language syntax]]
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[[Property:weight|0]]
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[[Property:uuid|d0f94270-f1e0-5545-2b1a-8cde3a6c73ab]]
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@@ -7,7 +7,7 @@
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The syntax specification is shown here as it is in the standard document. The format is BNF-E (Backus-Naur Form - Extended) which is also explained in the Language Specification section of the standard document.
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The syntax specification is shown here as it is in the standard document. The format is BNF-E. The Language Specification section of the standard document includes an overview of BNF-E.
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==Eiffel Syntax==
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@@ -18,16 +18,16 @@ Probably the most important to developers is the definition of an ''identifier''
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===Identifiers===
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An '''Identifier''' is a sequence of one or more alpha_numeric characters of which the first is a letter.
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An '''identifier''' is a sequence of one or more alpha_numeric characters of which the first is a letter.
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The definition is augmented by the rule that Identifiers are not valid if they are the same as one of the language's reserved words.
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===Class names ===
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Class_name =Δ [[#Identfiers|Identifier]] <br/><br/>
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Class_name ::= [[#Identfiers|Identifier]] <br/><br/>
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<br/>
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===Class declarations ===
|
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Class_declaration =Δ <nowiki>[</nowiki>[[#Notes|Notes]]<nowiki>]</nowiki> <br/>
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Class_declaration ::= <nowiki>[</nowiki>[[#Notes|Notes]]<nowiki>]</nowiki> <br/>
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[[#Class headers|Class_header]] <br/>
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<nowiki>[</nowiki>[[#Formal generic parameters|Formal_generics]]<nowiki>]</nowiki> <br/>
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<nowiki>[</nowiki>[[#Obsolete marks|Obsolete]]<nowiki>]</nowiki> <br/>
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@@ -40,82 +40,82 @@ Class_declaration =Δ <nowiki>[</nowiki>[[#Notes|Notes]]<nowiki>]</nowiki> <br/>
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<code>end</code><br/>
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<br/>
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===Notes ===
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Notes =Δ <code>note</code> Note_list<br/>
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Note_list =Δ {Note_entry ";" …}* <br/>
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Note_entry =Δ Note_name Note_values <br/>
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Note_name =Δ [[#Identifiers|Identifier]] ":" <br/>
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Note_values =Δ {Note_item ","…}+ <br/>
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Note_item =Δ [[#Identifiers|Identifier]] | [[#Manifest constants|Manifest_constant]] <br/>
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Notes ::= <code>note</code> Note_list<br/>
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Note_list ::= {Note_entry ";" …}* <br/>
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Note_entry ::= Note_name Note_values <br/>
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Note_name ::= [[#Identifiers|Identifier]] ":" <br/>
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Note_values ::= {Note_item ","…}+ <br/>
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Note_item ::= [[#Identifiers|Identifier]] | [[#Manifest constants|Manifest_constant]] <br/>
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<br/>
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===Class headers ===
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Class_header =Δ [Header_mark] <code>class</code> [[#Class names|Class_name]] <br/>
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Header_mark =Δ <code>deferred</code> | <code>expanded</code> | <code>frozen</code> <br/>
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Class_header ::= [Header_mark] <code>class</code> [[#Class names|Class_name]] <br/>
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Header_mark ::= <code>deferred</code> | <code>expanded</code> | <code>frozen</code> <br/>
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<br/>
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===Obsolete marks ===
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Obsolete =Δ <code>obsolete</code> Message <br/>
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Message =Δ [[#Manifest strings|Manifest_string]] <br/>
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Obsolete ::= <code>obsolete</code> Message <br/>
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Message ::= [[#Manifest strings|Manifest_string]] <br/>
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<br/>
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===Feature parts ===
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Features =Δ Feature_clause+ <br/>
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Feature_clause =Δ <code>feature</code> <nowiki>[</nowiki>[[#Clients|Clients]]<nowiki>]</nowiki> [Header_comment] Feature_declaration_list <br/>
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Feature_declaration_list =Δ {[[#Feature declarations|Feature_declaration]] ";" …}* <br/>
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Header_comment =Δ Comment <br/>
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Features ::= Feature_clause+ <br/>
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Feature_clause ::= <code>feature</code> <nowiki>[</nowiki>[[#Clients|Clients]]<nowiki>]</nowiki> [Header_comment] Feature_declaration_list <br/>
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Feature_declaration_list ::= {[[#Feature declarations|Feature_declaration]] ";" …}* <br/>
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Header_comment ::= [[#Comments|Comment]] <br/>
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<br/>
|
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===Feature declarations ===
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Feature_declaration =Δ New_feature_list Declaration_body <br/>
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Declaration_body =Δ [Formal_arguments] [Query_mark] [Feature_value] <br/>
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Query_mark =Δ Type_mark [Assigner_mark] <br/>
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Type_mark =Δ ":" Type <br/>
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Feature_value =Δ [Explicit_value] <br/>
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Feature_declaration ::= [[#New feature lists|New_feature_list]] Declaration_body <br/>
|
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Declaration_body ::= [Formal_arguments] [Query_mark] [Feature_value] <br/>
|
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Query_mark ::= Type_mark [Assigner_mark] <br/>
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Type_mark ::= ":" Type <br/>
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Feature_value ::= [Explicit_value] <br/>
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[Obsolete] <br/>
|
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[Header_comment] <br/>
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[Attribute_or_routine] <br/>
|
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Explicit_value =Δ "=" Manifest_constant <br/>
|
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Explicit_value ::= "=" Manifest_constant <br/>
|
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<br/>
|
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<br/>
|
||||
===New feature lists ===
|
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New_feature_list =Δ {New_feature "," …}+ <br/>
|
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New_feature =Δ [frozen] Extended_feature_name<br/>
|
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New_feature_list ::= {New_feature "," …}+ <br/>
|
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New_feature ::= [frozen] Extended_feature_name<br/>
|
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<br/>
|
||||
<br/>
|
||||
===Feature bodies ===
|
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Attribute_or_routine =Δ [Precondition] <br/>
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Attribute_or_routine ::= [Precondition] <br/>
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[Local_declarations] <br/>
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Feature_body <br/>
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[Postcondition] <br/>
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[Rescue] <br/>
|
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<code>end</code><br/>
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Feature_body =Δ Deferred | Effective_routine | Attribute<br/>
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Feature_body ::= Deferred | Effective_routine | Attribute<br/>
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<br/>
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||||
<br/>
|
||||
===Feature names ===
|
||||
Extended_feature_name =Δ Feature_name [Alias] <br/>
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Feature_name =Δ Identifier <br/>
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Alias =Δ <code>alias</code> '"' Alias_name '"' [convert] <br/>
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Alias_name =Δ Operator | Bracket <br/>
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Bracket =Δ "[ ]" <br/>
|
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Extended_feature_name ::= Feature_name [Alias] <br/>
|
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Feature_name ::= Identifier <br/>
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Alias ::= <code>alias</code> '"' Alias_name '"' [convert] <br/>
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Alias_name ::= Operator | Bracket <br/>
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Bracket ::= "[ ]" <br/>
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<br/>
|
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<br/>
|
||||
===Operators ===
|
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Operator =Δ Unary | Binary <br/>
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Unary =Δ <code>not</code> | "+" | "–" | Free_unary <br/>
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Binary =Δ "+" | "–" | "*" | "/" | "//" | "\\" | "^" | ".." | <br/>
|
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Operator ::= Unary | Binary <br/>
|
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Unary ::= <code>not</code> | "+" | "–" | Free_unary <br/>
|
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Binary ::= "+" | "–" | "*" | "/" | "//" | "\\" | "^" | ".." | <br/>
|
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"<" | ">" | "<=" | ">=" | <br/>
|
||||
<code>and</code> | <code>or</code> | <code>xor</code> | <code>and</code> <code>then</code> | <code>or</code> <code>else</code> | <code>implies</code> | <br/>
|
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Free_binary <br/>
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<br/>
|
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<br/>
|
||||
===Assigner marks ===
|
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Assigner_mark =Δ <code>assign</code> Feature_name<br/>
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Assigner_mark ::= <code>assign</code> Feature_name<br/>
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<br/>
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<br/>
|
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===Inheritance parts ===
|
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Inheritance =Δ Inherit_clause+ <br/>
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Inherit_clause =Δ <code>inherit</code> [Non_conformance] Parent_list <br/>
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Non_conformance =Δ "{" NONE "}" <br/>
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Parent_list =Δ {Parent ";" …}+ <br/>
|
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Parent =Δ Class_type [Feature_adaptation] <br/>
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Feature_adaptation =Δ [Undefine] <br/>
|
||||
Inheritance ::= Inherit_clause+ <br/>
|
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Inherit_clause ::= <code>inherit</code> [Non_conformance] Parent_list <br/>
|
||||
Non_conformance ::= "{" NONE "}" <br/>
|
||||
Parent_list ::= {Parent ";" …}+ <br/>
|
||||
Parent ::= Class_type [Feature_adaptation] <br/>
|
||||
Feature_adaptation ::= [Undefine] <br/>
|
||||
[Redefine] <br/>
|
||||
[Rename] <br/>
|
||||
[New_exports] <br/>
|
||||
@@ -125,358 +125,358 @@ Feature_adaptation =Δ [Undefine] <br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Rename clauses ===
|
||||
Rename =Δ <code>rename</code> Rename_list <br/>
|
||||
Rename_list =Δ {Rename_pair "," …}+ <br/>
|
||||
Rename_pair =Δ Feature_name <code>as</code> Extended_feature_name <br/>
|
||||
Rename ::= <code>rename</code> Rename_list <br/>
|
||||
Rename_list ::= {Rename_pair "," …}+ <br/>
|
||||
Rename_pair ::= Feature_name <code>as</code> Extended_feature_name <br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Clients ===
|
||||
Clients =Δ "{" Class_list "}" <br/>
|
||||
Class_list =Δ {Class_name "," …}+<br/>
|
||||
Clients ::= "{" Class_list "}" <br/>
|
||||
Class_list ::= {Class_name "," …}+<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Export adaptation ===
|
||||
New_exports =Δ <code>export</code> New_export_list <br/>
|
||||
New_export_list =Δ {New_export_item ";" …}+ <br/>
|
||||
New_export_item =Δ Clients [Header_comment] Feature_set <br/>
|
||||
Feature_set =Δ Feature_list | <code>all</code> <br/>
|
||||
Feature_list =Δ {Feature_name "," …}+<br/>
|
||||
New_exports ::= <code>export</code> New_export_list <br/>
|
||||
New_export_list ::= {New_export_item ";" …}+ <br/>
|
||||
New_export_item ::= Clients [Header_comment] Feature_set <br/>
|
||||
Feature_set ::= Feature_list | <code>all</code> <br/>
|
||||
Feature_list ::= {Feature_name "," …}+<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Formal argument and entity declarations ===
|
||||
Formal_arguments =Δ "(" Entity_declaration_list ")" <br/>
|
||||
Entity_declaration_list =Δ {Entity_declaration_group ";" …}+ <br/>
|
||||
Entity_declaration_group =Δ Identifier_list Type_mark <br/>
|
||||
Identifier_list =Δ {Identifier "," …}+ <br/>
|
||||
Formal_arguments ::= "(" Entity_declaration_list ")" <br/>
|
||||
Entity_declaration_list ::= {Entity_declaration_group ";" …}+ <br/>
|
||||
Entity_declaration_group ::= Identifier_list Type_mark <br/>
|
||||
Identifier_list ::= {Identifier "," …}+ <br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Routine bodies ===
|
||||
Deferred =Δ <code>deferred</code> <br/>
|
||||
Effective_routine =Δ Internal | External <br/>
|
||||
Internal =Δ Routine_mark Compound <br/>
|
||||
Routine_mark =Δ <code>do</code> | Once <br/>
|
||||
Once =Δ <code>once</code> [ "("Key_list ")" ] <br/>
|
||||
Key_list =Δ {Manifest_string "," …}+<br/>
|
||||
Deferred ::= <code>deferred</code> <br/>
|
||||
Effective_routine ::= Internal | External <br/>
|
||||
Internal ::= Routine_mark Compound <br/>
|
||||
Routine_mark ::= <code>do</code> | Once <br/>
|
||||
Once ::= <code>once</code> [ "("Key_list ")" ] <br/>
|
||||
Key_list ::= {Manifest_string "," …}+<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Local variable declarations ===
|
||||
Local_declarations =Δ <code>local</code> [Entity_declaration_list]<br/>
|
||||
Local_declarations ::= <code>local</code> [Entity_declaration_list]<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Instructions ===
|
||||
Compound =Δ {Instruction ";" …}* <br/>
|
||||
Instruction =Δ Creation_instruction | Call | Assignment | Assigner_call | Conditional | Multi_branch <br/>
|
||||
Compound ::= {Instruction ";" …}* <br/>
|
||||
Instruction ::= Creation_instruction | Call | Assignment | Assigner_call | Conditional | Multi_branch <br/>
|
||||
| Loop | Debug | Precursor | Check | Retry<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Assertions ===
|
||||
Precondition =Δ <code>require</code> [else] Assertion <br/>
|
||||
Postcondition =Δ <code>ensure</code> [then] Assertion [Only] <br/>
|
||||
Invariant =Δ <code>invariant</code> Assertion <br/>
|
||||
Assertion =Δ {Assertion_clause ";" …}* <br/>
|
||||
Assertion_clause =Δ [Tag_mark] Unlabeled_assertion_clause <br/>
|
||||
Unlabeled_assertion_clause =Δ Boolean_expression | Comment <br/>
|
||||
Tag_mark =Δ Tag ":" <br/>
|
||||
Tag =Δ Identifier <br/>
|
||||
Precondition ::= <code>require</code> [else] Assertion <br/>
|
||||
Postcondition ::= <code>ensure</code> [then] Assertion [Only] <br/>
|
||||
Invariant ::= <code>invariant</code> Assertion <br/>
|
||||
Assertion ::= {Assertion_clause ";" …}* <br/>
|
||||
Assertion_clause ::= [Tag_mark] Unlabeled_assertion_clause <br/>
|
||||
Unlabeled_assertion_clause ::= Boolean_expression | Comment <br/>
|
||||
Tag_mark ::= Tag ":" <br/>
|
||||
Tag ::= Identifier <br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===“Old” postcondition expressions ===
|
||||
Old =Δ <code>old</code> Expression<br/>
|
||||
Old ::= <code>old</code> Expression<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===“Only” postcondition clauses ===
|
||||
Only =Δ <code>only</code> [Feature_list]<br/>
|
||||
Only ::= <code>only</code> [Feature_list]<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Check instructions ===
|
||||
Check =Δ <code>check</code> Assertion [Notes] end<br/>
|
||||
Check ::= <code>check</code> Assertion [Notes] end<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Variants ===
|
||||
Variant =Δ <code>variant</code> [Tag_mark] Expression<br/>
|
||||
Variant ::= <code>variant</code> [Tag_mark] Expression<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Precursor ===
|
||||
Precursor =Δ <code>Precursor</code> [Parent_qualification] [Actuals] <br/>
|
||||
Parent_qualification =Δ "{" Class_name "}"<br/>
|
||||
Precursor ::= <code>Precursor</code> [Parent_qualification] [Actuals] <br/>
|
||||
Parent_qualification ::= "{" Class_name "}"<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Redefinition ===
|
||||
Redefine =Δ <code>redefine</code> Feature_list<br/>
|
||||
Redefine ::= <code>redefine</code> Feature_list<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Undefine clauses ===
|
||||
Undefine =Δ <code>undefine</code> Feature_list<br/>
|
||||
Undefine ::= <code>undefine</code> Feature_list<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Types ===
|
||||
Type =Δ Class_or_tuple_type | Formal_generic_name | Anchored <br/>
|
||||
Class_or_tuple_type =Δ Class_type | Tuple_type <br/>
|
||||
Class_type =Δ [Attachment_mark] Class_name [Actual_generics] <br/>
|
||||
Attachment_mark =Δ "?" | "!" <br/>
|
||||
Anchored =Δ [Attachment_mark] <code>like</code> Anchor <br/>
|
||||
Anchor =Δ Feature_name | Current<br/>
|
||||
Type ::= Class_or_tuple_type | Formal_generic_name | Anchored <br/>
|
||||
Class_or_tuple_type ::= Class_type | Tuple_type <br/>
|
||||
Class_type ::= [Attachment_mark] Class_name [Actual_generics] <br/>
|
||||
Attachment_mark ::= "?" | "!" <br/>
|
||||
Anchored ::= [Attachment_mark] <code>like</code> Anchor <br/>
|
||||
Anchor ::= Feature_name | Current<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Actual generic parameters ===
|
||||
Actual_generics =Δ "[" Type_list "]" <br/>
|
||||
Type_list =Δ {Type "," …}+<br/>
|
||||
Actual_generics ::= "[" Type_list "]" <br/>
|
||||
Type_list ::= {Type "," …}+<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Formal generic parameters ===
|
||||
Formal_generics =Δ "[" Formal_generic_list "]" <br/>
|
||||
Formal_generic_list =Δ {Formal_generic ","…}+ <br/>
|
||||
Formal_generic =Δ [frozen] Formal_generic_name [Constraint] <br/>
|
||||
Formal_generic_name =Δ [?] Identifier<br/>
|
||||
Formal_generics ::= "[" Formal_generic_list "]" <br/>
|
||||
Formal_generic_list ::= {Formal_generic ","…}+ <br/>
|
||||
Formal_generic ::= [frozen] Formal_generic_name [Constraint] <br/>
|
||||
Formal_generic_name ::= [?] Identifier<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Generic constraints ===
|
||||
Constraint =Δ "–>" Constraining_types [Constraint_creators] <br/>
|
||||
Constraining_types =Δ Single_constraint | Multiple_constraint <br/>
|
||||
Single_constraint =Δ Type [Renaming] <br/>
|
||||
Renaming =Δ Rename end<br/>
|
||||
Multiple_constraint =Δ "{" Constraint_list "}" <br/>
|
||||
Constraint_list =Δ {Single_constraint "," …}+ <br/>
|
||||
Constraint_creators =Δ <code>create</code> Feature_list end<br/>
|
||||
Constraint ::= "–>" Constraining_types [Constraint_creators] <br/>
|
||||
Constraining_types ::= Single_constraint | Multiple_constraint <br/>
|
||||
Single_constraint ::= Type [Renaming] <br/>
|
||||
Renaming ::= Rename end<br/>
|
||||
Multiple_constraint ::= "{" Constraint_list "}" <br/>
|
||||
Constraint_list ::= {Single_constraint "," …}+ <br/>
|
||||
Constraint_creators ::= <code>create</code> Feature_list end<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Tuple types ===
|
||||
Tuple_type =Δ <code>TUPLE</code> [Tuple_parameter_list] <br/>
|
||||
Tuple_parameter_list =Δ "[" Tuple_parameters "]"<br/>
|
||||
Tuple_parameters =Δ Type_list | Entity_declaration_list<br/>
|
||||
Tuple_type ::= <code>TUPLE</code> [Tuple_parameter_list] <br/>
|
||||
Tuple_parameter_list ::= "[" Tuple_parameters "]"<br/>
|
||||
Tuple_parameters ::= Type_list | Entity_declaration_list<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Manifest tuples ===
|
||||
Manifest_tuple =Δ "[" Expression_list "]" <br/>
|
||||
Expression_list =Δ {Expression "," …}*<br/>
|
||||
Manifest_tuple ::= "[" Expression_list "]" <br/>
|
||||
Expression_list ::= {Expression "," …}*<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Converter clauses ===
|
||||
Converters =Δ <code>convert</code> Converter_list <br/>
|
||||
Converter_list =Δ {Converter ","…}+ <br/>
|
||||
Converter =Δ Conversion_procedure | Conversion_query <br/>
|
||||
Conversion_procedure =Δ Feature_name "(" "{" Type_list "}" ")" <br/>
|
||||
Conversion_query =Δ Feature_name ":" "{" Type_list "}"<br/>
|
||||
Converters ::= <code>convert</code> Converter_list <br/>
|
||||
Converter_list ::= {Converter ","…}+ <br/>
|
||||
Converter ::= Conversion_procedure | Conversion_query <br/>
|
||||
Conversion_procedure ::= Feature_name "(" "{" Type_list "}" ")" <br/>
|
||||
Conversion_query ::= Feature_name ":" "{" Type_list "}"<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Select clauses ===
|
||||
Select =Δ <code>select</code> Feature_list<br/>
|
||||
Select ::= <code>select</code> Feature_list<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Conditionals ===
|
||||
Conditional =Δ <code>if</code> Then_part_list [Else_part] <code>end</code> <br/>
|
||||
Then_part_list =Δ {Then_part <code>elseif</code> …}+ <br/>
|
||||
Then_part =Δ Boolean_expression <code>then</code> Compound <br/>
|
||||
Else_part =Δ <code>else</code> Compound<br/>
|
||||
Conditional ::= <code>if</code> Then_part_list [Else_part] <code>end</code> <br/>
|
||||
Then_part_list ::= {Then_part <code>elseif</code> …}+ <br/>
|
||||
Then_part ::= Boolean_expression <code>then</code> Compound <br/>
|
||||
Else_part ::= <code>else</code> Compound<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Multi-branch instructions ===
|
||||
Multi_branch =Δ <code>inspect</code> Expression [When_part_list] [Else_part] <code>end</code> <br/>
|
||||
When_part_list =Δ When_part+ <br/>
|
||||
When_part =Δ <code>when</code> Choices <code>then</code> Compound <br/>
|
||||
Choices =Δ {Choice "," …}+ <br/>
|
||||
Choice =Δ Constant | Manifest_type | Constant_interval | Type_interval <br/>
|
||||
Constant_interval =Δ Constant ".." Constant <br/>
|
||||
Type_interval =Δ Manifest_type ".." Manifest_type<br/>
|
||||
Multi_branch ::= <code>inspect</code> Expression [When_part_list] [Else_part] <code>end</code> <br/>
|
||||
When_part_list ::= When_part+ <br/>
|
||||
When_part ::= <code>when</code> Choices <code>then</code> Compound <br/>
|
||||
Choices ::= {Choice "," …}+ <br/>
|
||||
Choice ::= Constant | Manifest_type | Constant_interval | Type_interval <br/>
|
||||
Constant_interval ::= Constant ".." Constant <br/>
|
||||
Type_interval ::= Manifest_type ".." Manifest_type<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Loops ===
|
||||
Loop =Δ Initialization <br/>
|
||||
Loop ::= Initialization <br/>
|
||||
[Invariant] <br/>
|
||||
Exit_condition <br/>
|
||||
Loop_body <br/>
|
||||
[Variant] <br/>
|
||||
<code>end</code> <br/>
|
||||
Initialization =Δ <code>from</code> Compound <br/>
|
||||
Exit_condition =Δ <code>until</code> Boolean_expression <br/>
|
||||
Loop_body =Δ <code>loop</code> Compound<br/>
|
||||
Initialization ::= <code>from</code> Compound <br/>
|
||||
Exit_condition ::= <code>until</code> Boolean_expression <br/>
|
||||
Loop_body ::= <code>loop</code> Compound<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Debug instructions ===
|
||||
Debug =Δ <code>debug</code> [ "("Key_list ")" ] Compound end<br/>
|
||||
Debug ::= <code>debug</code> [ "("Key_list ")" ] Compound end<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Attribute bodies ===
|
||||
Attribute =Δ <code>attribute</code> Compound<br/>
|
||||
Attribute ::= <code>attribute</code> Compound<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Entities and variables ===
|
||||
Entity =Δ Variable | Read_only <br/>
|
||||
Variable =Δ Variable_attribute | Local <br/>
|
||||
Variable_attribute =Δ Feature_name <br/>
|
||||
Local =Δ Identifier | <code>Result</code> <br/>
|
||||
Read_only =Δ Formal | Constant_attribute | <code>Current</code> <br/>
|
||||
Formal =Δ Identifier <br/>
|
||||
Constant_attribute =Δ Feature_name<br/>
|
||||
Entity ::= Variable | Read_only <br/>
|
||||
Variable ::= Variable_attribute | Local <br/>
|
||||
Variable_attribute ::= Feature_name <br/>
|
||||
Local ::= Identifier | <code>Result</code> <br/>
|
||||
Read_only ::= Formal | Constant_attribute | <code>Current</code> <br/>
|
||||
Formal ::= Identifier <br/>
|
||||
Constant_attribute ::= Feature_name<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Creators parts ===
|
||||
Creators =Δ Creation_clause+ <br/>
|
||||
Creation_clause =Δ <code>create</code> [Clients] [Header_comment] Creation_procedure_list <br/>
|
||||
Creation_procedure_list =Δ {Creation_procedure ","…}+ <br/>
|
||||
Creation_procedure =Δ Feature_name<br/>
|
||||
Creators ::= Creation_clause+ <br/>
|
||||
Creation_clause ::= <code>create</code> [Clients] [Header_comment] Creation_procedure_list <br/>
|
||||
Creation_procedure_list ::= {Creation_procedure ","…}+ <br/>
|
||||
Creation_procedure ::= Feature_name<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Creation instructions ===
|
||||
Creation_instruction =Δ <code>create</code> [Explicit_creation_type] Creation_call <br/>
|
||||
Explicit_creation_type =Δ "{" Type "}" <br/>
|
||||
Creation_call =Δ Variable [Explicit_creation_call] <br/>
|
||||
Explicit_creation_call =Δ "." Unqualified_call<br/>
|
||||
Creation_instruction ::= <code>create</code> [Explicit_creation_type] Creation_call <br/>
|
||||
Explicit_creation_type ::= "{" Type "}" <br/>
|
||||
Creation_call ::= Variable [Explicit_creation_call] <br/>
|
||||
Explicit_creation_call ::= "." Unqualified_call<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Creation expressions ===
|
||||
Creation_expression =Δ <code>create</code> Explicit_creation_type [Explicit_creation_call]<br/>
|
||||
Creation_expression ::= <code>create</code> Explicit_creation_type [Explicit_creation_call]<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Equality expressions ===
|
||||
Equality =Δ Expression Comparison Expression <br/>
|
||||
Comparison =Δ "=" | "/=" | "~" | "/~"<br/>
|
||||
Equality ::= Expression Comparison Expression <br/>
|
||||
Comparison ::= "=" | "/=" | "~" | "/~"<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Assignments ===
|
||||
Assignment =Δ Variable ":=" Expression<br/>
|
||||
Assignment ::= Variable ":=" Expression<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Assigner calls ===
|
||||
Assigner_call =Δ Expression ":=" Expression<br/>
|
||||
Assigner_call ::= Expression ":=" Expression<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Feature calls ===
|
||||
Call =Δ Object_call | Non_object_call <br/>
|
||||
Object_call =Δ [Target "."] Unqualified_call <br/>
|
||||
Unqualified_call =Δ Feature_name [Actuals] <br/>
|
||||
Target =Δ Local | Read_only | Call | Parenthesized_target <br/>
|
||||
Parenthesized_target =Δ "( |" Expression "| )" <br/>
|
||||
Non_object_call =Δ "{" Type "}" "." Unqualified_call<br/>
|
||||
Call ::= Object_call | Non_object_call <br/>
|
||||
Object_call ::= [Target "."] Unqualified_call <br/>
|
||||
Unqualified_call ::= Feature_name [Actuals] <br/>
|
||||
Target ::= Local | Read_only | Call | Parenthesized_target <br/>
|
||||
Parenthesized_target ::= "( |" Expression "| )" <br/>
|
||||
Non_object_call ::= "{" Type "}" "." Unqualified_call<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Actual arguments ===
|
||||
Actuals =Δ "(" Actual_list ")" <br/>
|
||||
Actual_list =Δ {Expression "," …}+<br/>
|
||||
Actuals ::= "(" Actual_list ")" <br/>
|
||||
Actual_list ::= {Expression "," …}+<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Object test ===
|
||||
Object_test =Δ "{" Identifier ":" Type "}" Expression<br/>
|
||||
Object_test ::= "{" Identifier ":" Type "}" Expression<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Rescue clauses ===
|
||||
Rescue =Δ <code>rescue</code> Compound <br/>
|
||||
Retry =Δ retry<br/>
|
||||
Rescue ::= <code>rescue</code> Compound <br/>
|
||||
Retry ::= retry<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Agents ===
|
||||
Agent =Δ Call_agent | Inline_agent <br/>
|
||||
Call_agent =Δ <code>agent</code> Call_agent_body <br/>
|
||||
Inline_agent =Δ <code>agent</code> [Formal_arguments] [Type_mark] [Attribute_or_routine] [Agent_actuals]<br/>
|
||||
Agent ::= Call_agent | Inline_agent <br/>
|
||||
Call_agent ::= <code>agent</code> Call_agent_body <br/>
|
||||
Inline_agent ::= <code>agent</code> [Formal_arguments] [Type_mark] [Attribute_or_routine] [Agent_actuals]<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Call agent bodies ===
|
||||
Call_agent_body =Δ Agent_qualified | Agent_unqualified <br/>
|
||||
Agent_qualified =Δ Agent_target ". " Agent_unqualified <br/>
|
||||
Agent_unqualified =Δ Feature_name [Agent_actuals] <br/>
|
||||
Agent_target =Δ Entity | Parenthesized | Manifest_type <br/>
|
||||
Agent_actuals =Δ "(" Agent_actual_list ")" <br/>
|
||||
Agent_actual_list =Δ {Agent_actual "," …}+ <br/>
|
||||
Agent_actual =Δ Expression | Placeholder <br/>
|
||||
Placeholder =Δ [Manifest_type] "?"<br/>
|
||||
Call_agent_body ::= Agent_qualified | Agent_unqualified <br/>
|
||||
Agent_qualified ::= Agent_target ". " Agent_unqualified <br/>
|
||||
Agent_unqualified ::= Feature_name [Agent_actuals] <br/>
|
||||
Agent_target ::= Entity | Parenthesized | Manifest_type <br/>
|
||||
Agent_actuals ::= "(" Agent_actual_list ")" <br/>
|
||||
Agent_actual_list ::= {Agent_actual "," …}+ <br/>
|
||||
Agent_actual ::= Expression | Placeholder <br/>
|
||||
Placeholder ::= [Manifest_type] "?"<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Expressions ===
|
||||
Expression =Δ Basic_expression | Special_expression <br/>
|
||||
Basic_expression =Δ Read_only | Local | Call | Precursor | Equality | Parenthesized | Old | <br/>
|
||||
Expression ::= Basic_expression | Special_expression <br/>
|
||||
Basic_expression ::= Read_only | Local | Call | Precursor | Equality | Parenthesized | Old | <br/>
|
||||
Operator_expression | Bracket_expression | Creation_expression <br/>
|
||||
Special_expression =Δ Manifest_constant | Manifest_tuple | Agent | Object_test | Once_string | <br/>
|
||||
Special_expression ::= Manifest_constant | Manifest_tuple | Agent | Object_test | Once_string | <br/>
|
||||
Address <br/>
|
||||
Parenthesized =Δ "(" Expression ")" <br/>
|
||||
Address =Δ "$" Variable <br/>
|
||||
Once_string =Δ <code>once</code> Manifest_string <br/>
|
||||
Boolean_expression =Δ Basic_expression | Boolean_constant | Object_test<br/>
|
||||
Parenthesized ::= "(" Expression ")" <br/>
|
||||
Address ::= "$" Variable <br/>
|
||||
Once_string ::= <code>once</code> Manifest_string <br/>
|
||||
Boolean_expression ::= Basic_expression | Boolean_constant | Object_test<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Operator expressions ===
|
||||
Operator_expression =Δ Unary_expression | Binary_expression <br/>
|
||||
Unary_expression =Δ Unary Expression <br/>
|
||||
Binary_expression =Δ Expression Binary Expression<br/>
|
||||
Operator_expression ::= Unary_expression | Binary_expression <br/>
|
||||
Unary_expression ::= Unary Expression <br/>
|
||||
Binary_expression ::= Expression Binary Expression<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Bracket expressions ===
|
||||
Bracket_expression =Δ Bracket_target "[" Actuals "]" <br/>
|
||||
Bracket_target =Δ Target | Once_string | Manifest_constant | Manifest_tuple<br/>
|
||||
Bracket_expression ::= Bracket_target "[" Actuals "]" <br/>
|
||||
Bracket_target ::= Target | Once_string | Manifest_constant | Manifest_tuple<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Constants ===
|
||||
Constant =Δ Manifest_constant | Constant_attribute <br/>
|
||||
Constant_attribute =Δ Feature_name<br/>
|
||||
Constant ::= Manifest_constant | Constant_attribute <br/>
|
||||
Constant_attribute ::= Feature_name<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Manifest constants ===
|
||||
Manifest_constant =Δ [Manifest_type] Manifest_value <br/>
|
||||
Manifest_type =Δ "{" Type "}"<br/>
|
||||
Manifest_value =Δ Boolean_constant | <br/>
|
||||
Manifest_constant ::= [Manifest_type] Manifest_value <br/>
|
||||
Manifest_type ::= "{" Type "}"<br/>
|
||||
Manifest_value ::= Boolean_constant | <br/>
|
||||
Character_constant | <br/>
|
||||
Integer_constant | <br/>
|
||||
Real_constant | <br/>
|
||||
Manifest_string | <br/>
|
||||
Manifest_type <br/>
|
||||
Sign =Δ "+" | "–" <br/>
|
||||
Integer_constant =Δ [Sign] Integer <br/>
|
||||
Character_constant =Δ " ' " Character " ' " <br/>
|
||||
Boolean_constant =Δ <code>True</code> | <code>False</code> <br/>
|
||||
Real_constant =Δ [Sign] Real<br/>
|
||||
Sign ::= "+" | "–" <br/>
|
||||
Integer_constant ::= [Sign] Integer <br/>
|
||||
Character_constant ::= " ' " Character " ' " <br/>
|
||||
Boolean_constant ::= <code>True</code> | <code>False</code> <br/>
|
||||
Real_constant ::= [Sign] Real<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Manifest strings ===
|
||||
Manifest_string =Δ Basic_manifest_string | Verbatim_string <br/>
|
||||
Basic_manifest_string =Δ ' " ' String_content ' " ' <br/>
|
||||
String_content =Δ {Simple_string Line_wrapping_part …}+<br/>
|
||||
Verbatim_string =Δ Verbatim_string_opener Line_sequence Verbatim_string_closer <br/>
|
||||
Verbatim_string_opener =Δ ' " ' [Simple_string] Open_bracket <br/>
|
||||
Verbatim_string_closer =Δ Close_bracket [Simple_string] ' " ' <br/>
|
||||
Open_bracket =Δ "[" | "{" <br/>
|
||||
Close_bracket =Δ "]" | "}"Verbatim_string =Δ Verbatim_string_opener Line_sequence Verbatim_string_closer <br/>
|
||||
Verbatim_string_opener =Δ ' " ' [Simple_string] Open_bracket <br/>
|
||||
Verbatim_string_closer =Δ Close_bracket [Simple_string] ' " ' <br/>
|
||||
Open_bracket =Δ "[" | "{" <br/>
|
||||
Close_bracket =Δ "]" | "}" <br/>
|
||||
Manifest_string ::= Basic_manifest_string | Verbatim_string <br/>
|
||||
Basic_manifest_string ::= ' " ' String_content ' " ' <br/>
|
||||
String_content ::= {Simple_string Line_wrapping_part …}+<br/>
|
||||
Verbatim_string ::= Verbatim_string_opener Line_sequence Verbatim_string_closer <br/>
|
||||
Verbatim_string_opener ::= ' " ' [Simple_string] Open_bracket <br/>
|
||||
Verbatim_string_closer ::= Close_bracket [Simple_string] ' " ' <br/>
|
||||
Open_bracket ::= "[" | "{" <br/>
|
||||
Close_bracket ::= "]" | "}"Verbatim_string ::= Verbatim_string_opener Line_sequence Verbatim_string_closer <br/>
|
||||
Verbatim_string_opener ::= ' " ' [Simple_string] Open_bracket <br/>
|
||||
Verbatim_string_closer ::= Close_bracket [Simple_string] ' " ' <br/>
|
||||
Open_bracket ::= "[" | "{" <br/>
|
||||
Close_bracket ::= "]" | "}" <br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===External routines ===
|
||||
External =Δ <code>external</code> External_language [External_name] <br/>
|
||||
External_language =Δ Unregistered_language | Registered_language <br/>
|
||||
Unregistered_language =Δ Manifest_string <br/>
|
||||
External_name =Δ <code>alias</code> Manifest_string<br/>
|
||||
External ::= <code>external</code> External_language [External_name] <br/>
|
||||
External_language ::= Unregistered_language | Registered_language <br/>
|
||||
Unregistered_language ::= Manifest_string <br/>
|
||||
External_name ::= <code>alias</code> Manifest_string<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Registered languages ===
|
||||
Registered_language =Δ C_external | C++_external | DLL_external<br/>
|
||||
Registered_language ::= C_external | C++_external | DLL_external<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===External signatures ===
|
||||
External_signature =Δ signature [External_argument_types] [: External_type] <br/>
|
||||
External_argument_types =Δ "(" External_type_list ")" <br/>
|
||||
External_type_list =Δ {External_type "," …}* <br/>
|
||||
External_type =Δ Simple_string<br/>
|
||||
External_signature ::= signature [External_argument_types] [: External_type] <br/>
|
||||
External_argument_types ::= "(" External_type_list ")" <br/>
|
||||
External_type_list ::= {External_type "," …}* <br/>
|
||||
External_type ::= Simple_string<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===External file use ===
|
||||
External_file_use =Δ use External_file_list <br/>
|
||||
External_file_list =Δ {External_file "," …}+ <br/>
|
||||
External_file =Δ External_user_file | External_system_file <br/>
|
||||
External_user_file =Δ ' " ' Simple_string ' " ' <br/>
|
||||
External_system_file =Δ "<"Simple_string ">"<br/>
|
||||
External_file_use ::= use External_file_list <br/>
|
||||
External_file_list ::= {External_file "," …}+ <br/>
|
||||
External_file ::= External_user_file | External_system_file <br/>
|
||||
External_user_file ::= ' " ' Simple_string ' " ' <br/>
|
||||
External_system_file ::= "<"Simple_string ">"<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===C externals ===
|
||||
C_external =Δ ’' " ' C <br/>
|
||||
C_external ::= ’' " ' C <br/>
|
||||
’[inline] <br/>
|
||||
[External_signature] [External_file_use] <br/>
|
||||
' " '<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===C++ externals ===
|
||||
C++_external =Δ ' " ' C++ <br/>
|
||||
C++_external ::= ' " ' C++ <br/>
|
||||
inline <br/>
|
||||
[External_signature] <br/>
|
||||
[External_file_use] <br/>
|
||||
@@ -484,27 +484,27 @@ inline <br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===DLL externals ===
|
||||
DLL_external =Δ ' " ' dll <br/>
|
||||
DLL_external ::= ' " ' dll <br/>
|
||||
[windows] <br/>
|
||||
DLL_identifier <br/>
|
||||
[DLL_index] <br/>
|
||||
[External_signature] <br/>
|
||||
[External_file_use] <br/>
|
||||
' " ' <br/>
|
||||
DLL_identifier =Δ Simple_string <br/>
|
||||
DLL_index =Δ Integer<br/>
|
||||
DLL_identifier ::= Simple_string <br/>
|
||||
DLL_index ::= Integer<br/>
|
||||
<br/>
|
||||
<br/>
|
||||
===Comments ===
|
||||
Comment =Δ "– –" {Simple_string Comment_break …}* <br/>
|
||||
Comment_break =Δ New_line [Blanks_or_tabs] "– –"<br/>
|
||||
Comment ::= "– –" {Simple_string Comment_break …}* <br/>
|
||||
Comment_break ::= New_line [Blanks_or_tabs] "– –"<br/>
|
||||
<br/>
|
||||
===Integers ===
|
||||
Integer =Δ [Integer_base] Digit_sequence <br/>
|
||||
Integer_base =Δ "0" Integer_base_letter <br/>
|
||||
Integer_base_letter =Δ "b" | "c" | "x" | "B" | "C" | "X" <br/>
|
||||
Digit_sequence =Δ Digit+ <br/>
|
||||
Digit =Δ "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | <br/>
|
||||
Integer ::= [Integer_base] Digit_sequence <br/>
|
||||
Integer_base ::= "0" Integer_base_letter <br/>
|
||||
Integer_base_letter ::= "b" | "c" | "x" | "B" | "C" | "X" <br/>
|
||||
Digit_sequence ::= Digit+ <br/>
|
||||
Digit ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | <br/>
|
||||
"a" | "b" | "c" | "d" | "e" | "f" | <br/>
|
||||
"A" | "B" | "C" | "D" | "E" | "F" | "_"<br/>
|
||||
|
||||
|
||||
Reference in New Issue
Block a user