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36 lines
773 B
C++
36 lines
773 B
C++
#pragma once
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#include <Parsers/IAST.h>
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#include <vector>
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namespace DB
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{
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class WriteBuffer;
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/** For every lambda expression, rename its parameters to '_lambda0_arg0' form.
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* Check correctness of lambda expressions.
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* Find functions, that have lambda expressions as arguments (they are called "higher order" functions).
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*
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* This should be done before CollectAliases.
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*/
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struct AnalyzeLambdas
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{
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void process(ASTPtr & ast);
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/// Parameters of lambda expressions.
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using LambdaParameters = std::vector<String>;
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static LambdaParameters extractLambdaParameters(ASTPtr & ast);
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using HigherOrderFunctions = std::vector<ASTPtr>;
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HigherOrderFunctions higher_order_functions;
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/// Debug output
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void dump(WriteBuffer & out) const;
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};
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}
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