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add with compound statement #4163

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add with compound statement #4163

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27 changes: 18 additions & 9 deletions spec/statement.dd
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Original file line number Diff line number Diff line change
Expand Up @@ -339,7 +339,6 @@ else
//writeln(m.pre); // Error: undefined identifier 'm'
---
)
)

$(H2 $(LEGACY_LNAME2 WhileStatement, while-statement, While Statement))

Expand Down Expand Up @@ -1762,12 +1761,18 @@ object.)

$(GRAMMAR
$(GNAME WithStatement):
$(D with) $(D $(LPAREN)) $(EXPRESSION) $(D $(RPAREN)) $(PSSCOPE)
$(D with) $(D $(LPAREN)) $(GLINK2 template, Symbol) $(D $(RPAREN)) $(PSSCOPE)
$(D with) $(D $(LPAREN)) $(GLINK2 template, TemplateInstance) $(D $(RPAREN)) $(PSSCOPE)
$(GLINK WithClause) $(PSSCOPE)
$(GLINK WithClause) : $(GLINK StatementList)

$(GNAME WithClause):
$(D with) $(D $(LPAREN)) $(EXPRESSION) $(D $(RPAREN))
$(D with) $(D $(LPAREN)) $(GLINK2 template, Symbol) $(D $(RPAREN))
$(D with) $(D $(LPAREN)) $(GLINK2 template, TemplateInstance) $(D $(RPAREN))
)

where *Expression* evaluates to one of:
$(P The *StatementList* form is equivalent to the *ScopeStatement* form.)

$(P *Expression* evaluates to one of:)

$(UL
$(LI a class reference)
Expand All @@ -1776,8 +1781,8 @@ $(GNAME WithStatement):
$(LI a pointer to one of the above)
)

Within the with body the referenced object is searched first for
identifier symbols.
Within the `with` $(I ScopeStatement) or $(I StatementList) the referenced object is
searched first for identifier symbols.

---
enum E { A, B }
Expand Down Expand Up @@ -1815,8 +1820,8 @@ with (expression)
}(expression);
--------------

$(P Note that *Expression* only gets evaluated once and is not copied.
The with statement does not change what $(D this) or
$(NOTE *Expression* only gets evaluated once and is not copied.
The *WithStatement* does not change what $(D this) or
$(D super) refer to.
)

Expand Down Expand Up @@ -1923,6 +1928,10 @@ void main()
// not implemented in `main`'s scope, so resolution is
// subsequently forward to module scope.
}

with(foo): // StatementList form
f(); // prints "Foo.f"
f(); // prints "Foo.f"
}
---
)
Expand Down