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employ explicit conversions to/from "any" and "vector of any" types

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This commit is contained in:
Vern Paxson 2021-05-30 18:05:11 -07:00
parent 292bd1b671
commit 8044926e00
3 changed files with 85 additions and 14 deletions
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16
src/Expr.h
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@ -72,7 +72,7 @@ enum BroExprTag : int {
// ASTs produced by parsing .zeek script files.
EXPR_INDEX_ASSIGN, EXPR_FIELD_LHS_ASSIGN,
EXPR_APPEND_TO,
EXPR_TO_ANY_COERCE, EXPR_FROM_ANY_COERCE,
EXPR_TO_ANY_COERCE, EXPR_FROM_ANY_COERCE, EXPR_FROM_ANY_VEC_COERCE,
EXPR_ANY_INDEX,
EXPR_NOP,
@ -1622,6 +1622,20 @@ protected:
ExprPtr Duplicate() override;
};
// ... and for conversion from a "vector of any" type.
class CoerceFromAnyVecExpr : public UnaryExpr {
public:
// to_type is yield type, not VectorType.
CoerceFromAnyVecExpr(ExprPtr op, TypePtr to_type);
// Can't use UnaryExpr's Eval() because it will do folding
// over the individual vector elements.
ValPtr Eval(Frame* f) const override;
protected:
ExprPtr Duplicate() override;
};
// Expression used to explicitly capture [a, b, c, ...] = x assignments.
class AnyIndexExpr : public UnaryExpr {
public: