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Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
38 lines
1.2 KiB
Go
38 lines
1.2 KiB
Go
package hcl
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// ExprList tests if the given expression is a static list construct and,
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// if so, extracts the expressions that represent the list elements.
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// If the given expression is not a static list, error diagnostics are
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// returned.
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//
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// A particular Expression implementation can support this function by
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// offering a method called ExprList that takes no arguments and returns
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// []Expression. This method should return nil if a static list cannot
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// be extracted. Alternatively, an implementation can support
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// UnwrapExpression to delegate handling of this function to a wrapped
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// Expression object.
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func ExprList(expr Expression) ([]Expression, Diagnostics) {
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type exprList interface {
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ExprList() []Expression
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}
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physExpr := UnwrapExpressionUntil(expr, func(expr Expression) bool {
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_, supported := expr.(exprList)
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return supported
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})
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if exL, supported := physExpr.(exprList); supported {
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if list := exL.ExprList(); list != nil {
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return list, nil
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}
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}
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return nil, Diagnostics{
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&Diagnostic{
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Severity: DiagError,
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Summary: "Invalid expression",
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Detail: "A static list expression is required.",
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Subject: expr.StartRange().Ptr(),
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},
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}
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}
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