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cppdraft/dcl/ptr.md

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+[dcl.ptr]
+
+# 9 Declarations [[dcl]](./#dcl)
+
+## 9.3 Declarators [[dcl.decl]](dcl.decl#dcl.ptr)
+
+### 9.3.4 Meaning of declarators [[dcl.meaning]](dcl.meaning#dcl.ptr)
+
+#### 9.3.4.2 Pointers [dcl.ptr]
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/declarations.tex#L3032)
+
+In a declarationTD whereD has the form
+
+* [*attribute-specifier-seq*](dcl.attr.grammar#nt:attribute-specifier-seq "9.13.1 Attribute syntax and semantics [dcl.attr.grammar]")opt [*cv-qualifier-seq*](dcl.decl.general#nt:cv-qualifier-seq "9.3.1 General [dcl.decl.general]")opt D1
+
+and the type of the contained [*declarator-id*](dcl.decl.general#nt:declarator-id "9.3.1 General [dcl.decl.general]") in the declarationTD1 is “*derived-declarator-type-list*T”,
+the type of the [*declarator-id*](dcl.decl.general#nt:declarator-id "9.3.1 General [dcl.decl.general]") inD is “*derived-declarator-type-list* [*cv-qualifier-seq*](dcl.decl.general#nt:cv-qualifier-seq "9.3.1 General [dcl.decl.general]") pointer toT”[.](#1.sentence-1)
+
+The[*cv-qualifier*](dcl.decl.general#nt:cv-qualifier "9.3.1 General [dcl.decl.general]")*s* apply to the pointer and not to the object pointed to[.](#1.sentence-2)
+
+Similarly, the optional [*attribute-specifier-seq*](dcl.attr.grammar#nt:attribute-specifier-seq "9.13.1 Attribute syntax and semantics [dcl.attr.grammar]") ([[dcl.attr.grammar]](dcl.attr.grammar "9.13.1 Attribute syntax and semantics")) appertains to the pointer and not to the object pointed to[.](#1.sentence-3)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/declarations.tex#L3058)
+
+[*Example [1](#example-1)*:
+
+The declarationsconst int ci = 10, *pc = &ci, *const cpc = pc, **ppc;int i, *p, *const cp = &i; declareci,
+a constant integer;pc,
+a pointer to a constant integer;cpc,
+a constant pointer to a constant integer;ppc,
+a pointer to a pointer to a constant integer;i,
+an integer;p,
+a pointer to integer; andcp,
+a constant pointer to integer[.](#2.sentence-1)
+
+The value ofci,cpc,
+andcp cannot be changed after initialization[.](#2.sentence-2)
+
+The value ofpc can be changed, and so can the object pointed to bycp[.](#2.sentence-3)
+
+Examples of
+some correct operations arei = ci;*cp = ci;
+pc++;
+pc = cpc;
+pc = p;
+ppc = &pc;
+
+Examples of ill-formed operations areci = 1; // error ci++; // error*pc = 2; // error cp = &ci; // error cpc++; // error p = pc; // error ppc = &p; // error
+
+Each is unacceptable because it would either change the value of an object declaredconst or allow it to be changed through a cv-unqualified pointer later, for example:*ppc = &ci; // OK, but would make p point to ci because of previous error*p = 5; // clobber ci
+
+— *end example*]
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/declarations.tex#L3121)
+
+See also [[expr.assign]](expr.assign "7.6.19 Assignment and compound assignment operators") and [[dcl.init]](dcl.init "9.5 Initializers")[.](#3.sentence-1)
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/declarations.tex#L3124)
+
+[*Note [1](#note-1)*:
+
+Forming a pointer to reference type is ill-formed; see [[dcl.ref]](dcl.ref "9.3.4.3 References")[.](#4.sentence-1)
+
+Forming a function pointer type is ill-formed if the function type has[*cv-qualifier*](dcl.decl.general#nt:cv-qualifier "9.3.1 General [dcl.decl.general]")*s* or a [*ref-qualifier*](dcl.decl.general#nt:ref-qualifier "9.3.1 General [dcl.decl.general]");
+see [[dcl.fct]](dcl.fct "9.3.4.6 Functions")[.](#4.sentence-2)
+
+Since the address of a bit-field ([[class.bit]](class.bit "11.4.10 Bit-fields")) cannot be taken,
+a pointer can never point to a bit-field[.](#4.sentence-3)
+
+— *end note*]