github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/sql/opt/optgen/cmd/langgen/ops_gen.go (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package main
    12  
    13  import (
    14  	"fmt"
    15  	"io"
    16  
    17  	"github.com/cockroachdb/cockroach/pkg/sql/opt/optgen/lang"
    18  )
    19  
    20  // generateOps generates the Operator type and enumeration for the Optgen
    21  // AST nodes.
    22  func generateOps(compiled *lang.CompiledExpr, w io.Writer) {
    23  	fmt.Fprintf(w, "type Operator int\n\n")
    24  
    25  	fmt.Fprintf(w, "const (\n")
    26  	fmt.Fprintf(w, "  UnknownOp Operator = iota\n\n")
    27  
    28  	for _, define := range compiled.Defines {
    29  		fmt.Fprintf(w, "  %sOp\n", define.Name)
    30  	}
    31  
    32  	fmt.Fprintf(w, ")\n\n")
    33  }