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138 строки
3.4 KiB
138 строки
3.4 KiB
========================================================================
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pointer declarations vs multiplications
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========================================================================
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int main() {
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// declare a function pointer
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T1 * b(T2 a);
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// evaluate an expression
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c * d(5);
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}
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---
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(translation_unit (function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(comment)
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(declaration
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(type_identifier)
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(pointer_declarator (function_declarator
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(identifier)
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(parameter_list (parameter_declaration (type_identifier) (identifier))))))
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(comment)
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(expression_statement (math_expression
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(identifier)
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(call_expression (identifier) (argument_list (number_literal))))))))
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========================================================================
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casts vs multiplications
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========================================================================
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/*
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* ambiguities
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*/
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int main() {
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// cast
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a((B *)c);
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// parenthesized product
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d((e * f));
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}
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---
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(translation_unit
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(comment)
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(comment)
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(expression_statement (call_expression
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(identifier)
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(argument_list (cast_expression (type_descriptor (type_identifier) (abstract_pointer_declarator)) (identifier)))))
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(comment)
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(expression_statement (call_expression
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(identifier)
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(argument_list (parenthesized_expression (math_expression (identifier) (identifier)))))))))
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========================================================================
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function-like type macros vs function calls
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========================================================================
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// this is a macro
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GIT_INLINE(int *) x = 5;
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---
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(translation_unit
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(comment)
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(declaration
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(macro_type_specifier (identifier) (type_descriptor (primitive_type) (abstract_pointer_declarator)))
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(init_declarator (identifier) (number_literal))))
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========================================================================
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function calls vs parenthesized declarators vs macro types
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========================================================================
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int main() {
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/*
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* Could be either:
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* - function call
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* - declaration w/ parenthesized declarator
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* - declaration w/ macro type, no declarator
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*/
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ABC(d);
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/*
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* Normal declaration
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*/
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efg hij;
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(comment)
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(expression_statement (call_expression (identifier) (argument_list (identifier))))
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(comment)
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(declaration (type_identifier) (identifier)))))
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========================================================================
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Comments after for loops with ambiguities
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========================================================================
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int main() {
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for (a *b = c; d; e) {
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aff;
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}
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// a-comment
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g;
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}
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---
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(translation_unit (function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(for_statement
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(declaration (type_identifier) (init_declarator
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(pointer_declarator (identifier))
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(identifier)))
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(identifier)
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(identifier)
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(compound_statement
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(expression_statement (identifier))))
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(comment)
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(expression_statement (identifier)))))
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