10.2.1 Function Symbols

This example shows a typical function declaration.

 1: void
 2: swap( int& a, int& b )
 3: {
 4:     int tmp = a;
 5:     a = b;
 6:     b = tmp;
 7:     int ignored =
 8:         a + b;
 9: }

Line 1 shows a topmost-intro since it is the first line that introduces a top-level construct. Line 2 is a continuation of the top-level construct introduction so it has the syntax topmost-intro-cont. Line 3 shows a defun-open since it is the brace that opens a top-level function definition. Line 9 is the corresponding defun-close since it contains the brace that closes the top-level function definition. Line 4 is a defun-block-intro, i.e. it is the first line of a brace-block, enclosed in a top-level function definition.

Lines 5, 6, and 7 are all given statement syntax since there isn’t much special about them. Note however that line 8 is given statement-cont syntax since it continues the statement begun on the previous line.