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41 lines
782 B
Go
41 lines
782 B
Go
package config
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import (
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"sync"
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"github.com/hashicorp/terraform/helper/multierror"
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)
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// exprErrors are the errors built up from parsing. These should not
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// be accessed directly.
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var exprErrors []error
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var exprLock sync.Mutex
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var exprResult Interpolation
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// ExprParse parses the given expression and returns an executable
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// Interpolation.
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func ExprParse(v string) (Interpolation, error) {
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exprLock.Lock()
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defer exprLock.Unlock()
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exprErrors = nil
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exprResult = nil
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// Parse
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lex := &exprLex{input: v}
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exprParse(lex)
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// Build up the errors
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var err error
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if lex.Err != nil {
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err = multierror.ErrorAppend(err, lex.Err)
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}
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if len(exprErrors) > 0 {
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err = multierror.ErrorAppend(err, exprErrors...)
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}
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if err != nil {
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exprResult = nil
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}
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return exprResult, err
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}
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