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<<Navigation: 执行失败 ['AllContext' object has no attribute 'values'] (see also the log)>>
A.2 Lexical Conventions
A program consists of one or more translation units stored in files. It is translated in several phases, which are described in Par.A.12. The first phases do low-level lexical transformations, carry out directives introduced by the lines beginning with the # character, and perform macro definition and expansion. When the preprocessing of Par.A.12 is complete, the program has been reduced to a sequence of tokens.