Module expr

Expand description

Types to represent the HCL expression sub-language.

The module contains the Expression enum which can represent any valid HCL expression in HCL attribute values and templates.

Structs§

BinaryOp: An operation that applies an operator to two expressions.
Conditional: The conditional operator allows selecting from one of two expressions based on the outcome of a boolean expression.
ForExpr: A for expression is a construct for constructing a collection by projecting the items from another collection.
FuncCall: Represents a function call expression with zero or more arguments.
FuncCallBuilder: A builder for function calls.
FuncName: Type representing a (potentially namespaced) function name.
Heredoc: A heredoc template expression is introduced by a << sequence and defines a template via a multi-line sequence terminated by a user-chosen delimiter.
Traversal: Traverse an expression to access attributes, object keys or element indices.
TraversalBuilder: A builder for expression traversals.
UnaryOp: An operation that applies an operator to one expression.
Variable: A type representing a variable in an HCL expression.

BinaryOperator: An operator that can be applied to two expressions.
Expression: A type representing the expression sub-language. It is used in HCL attributes to specify values and in HCL templates.
HeredocStripMode: The strip behaviour for the template contained in the heredoc.
ObjectKey: Represents an object key.
Operation: Operations apply a particular operator to either one or two expression terms.
TemplateExpr: A template expression embeds a program written in the template sub-language as an expression.
TraversalOperator: The expression traversal operators that are supported by HCL.
UnaryOperator: An operator that can be applied to an expression.

to_expression: Convert a T into hcl::Expression which is an enum that can represent any valid HCL attribute value expression.