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Programs cannot safely rely on the order of evaluation of operands between sequence points. In this non-compliant code example, the order of evaluation of the operands to the { + } operator are unspecified.
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\[[ISO/IEC 9899-1999|AA. C References#ISO/IEC 9899-1999]\] Section 5.1.2.3, "Program execution," Section 6.5, "Expressions," Annex C, "Sequence points" \[[Summit 05|AA. C References#Summit 05]\] Questions 3.1, 3.2, 3.3, 3.3b, 3.7, 3.8, 3.9, 3.10a, 3.10b, 3.11 \[[Saks 07|AA. C References#Saks 07]\] |
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EXP10-A. Do not diminish the benefits of constants by assuming their values in expressions 03. Expressions (EXP) EXP31-C. Do not modify constant values