Enumerated constant blocks are declared at file scope.  Unlike other languages, which allow enumerated constant blocks to be limited in scope to a particular namespace, enumerated constant blocks always have global scope in BAR.

EnumConstantBlock ::= 'enum' S EnumeratedConstantBlockName S? ‘{‘ S? EnumTypeAssignment (S? ‘,’ S? EnumTypeAssignment)* S? ‘}’ S? ';'

The name uniquely identifies the enumerated constant block.  The name is an identifier that has not appeared earlier in the file as a construct name, an enumerated constant block name, an enumerated constant name, a global variable name, or a global function name.

EnumTypeAssignment ::= EnumeratedConstant (S? '=' S? Constant)?

Each enumerated constant name (EnumeratedConstant) uniquely identifies an enumerated constant in the block.  The name is an identifier that has not appeared earlier in the file as a construct name, an enumerated constant block name, an enumerated constant name, a global variable name, or a global function name.

For each enumerated constant name, one can optionally assign a specific constant. If no equals symbol appears for the first enumerated constant in the block, numbering starts at zero and increases by one for each subsequent constant without an assigned number.  If a number is assigned, numbering begins for this constant at the number specified, and increases by one from this number for each subsequent constant without an assigned number.

  See also:  [Global variable declarations] [Global function declarations] [Enumerated constant block declarations]
[Structure declarations] [Block declarations] [List declarations]