短語詞組短語attributed abstract syntax tree 抽象語法樹Abstract Syntax Tree AST 稱為c abstract syntax tree c 抽象語法樹GCC abstract syntax tree GCC 抽象語法樹canonical abstract syntax tree 規(guī)范抽象語法樹Abstract Syntax Tree -AST Transformations 抽象語法樹轉(zhuǎn)換 返回 abstract syntax tree