Datasheet

C and C++ Compiler Implementation Limits

D.1 C++ ISO/IEC standard limits

The ISO/IEC C++ standard recommends minimum limits that a conforming compiler

must accept. You must be aware of these when porting applications between compilers.

A summary is given in Table D-1. A limit of memory indicates that no limit is imposed

by the ARM compilers, other than that imposed by the available memory.

Table D-1 Implementation limits

Description Recommended ARM

Nesting levels of compound statements, iteration control structures, and

selection control structures.

256 memory

Nesting levels of conditional inclusion. 256 memory

Pointer, array, and function declarators (in any combination) modifying an

arithmetic, structure, union, or incomplete type in a declaration.

256 memory

Nesting levels of parenthesized expressions within a full expression. 256 memory

Number of initial characters in an internal identifier or macro name. 1024 1024

Number of initial characters in an external identifier. 1024 1024

External identifiers in one translation unit. 65536 memory

Identifiers with block scope declared in one block. 1024 memory

Macro identifiers simultaneously defined in one translation unit. 65536 memory

Parameters in one function declaration. Overload resolution is sensitive to

the first 32 arguments only.

256 memory

Arguments in one function call. Overload resolution is sensitive to the first

32 arguments only.

256 memory

Parameters in one macro definition. 256 memory

Arguments in one macro invocation. 256 memory

Characters in one logical source line. 65536 memory

Characters in a character string literal or wide string literal after

concatenation.

65536 memory

Size of a C or C++ object (including arrays) 262144 268435454

Nesting levels of #include file. 256 memory