40 lines
628 B
Plaintext
40 lines
628 B
Plaintext
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Variables
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global variables (enabled when awk->opt & XP_AWK_OPT_VARDCL)
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global x;
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global x, y;
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local variables (enabled when awk->opt & XP_AWK_OPT_VARDCL)
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local x;
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local x, y;
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function arguments (enabled always)
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function funca (x, y)
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local variables in function declaration (enabled when awk->opt & XP_AWK_OPT_FUNCLOCAL)
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function funca (x, y, v1, v2)
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variables without any declarations (enabled when awk->opt & XP_AWK_OPT_NAMEDVAR)
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x = 10; // x is put into the global hash table.
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Optimization
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constant folding
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2 * 10 => 20
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loop
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remove while (0) { ... }
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if
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remove if (0) {}
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use else_part only
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