types/basetypes: Fix Float64Attribute precision comparisons #817
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austinvalle
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austinvalle
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bflad
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Co-authored-by: Brian Flad <[email protected]>
Co-authored-by: Brian Flad <[email protected]>
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Oh wow, surprised that |
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Fix included in terraform-plugin-framework v1.3.4 (via hashicorp/terraform-plugin-framework#817) - Closes #335
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Closes #815
Related corner tests: hashicorp/terraform-provider-corner#170
Context
Terraform core's
numbertype can store up to 512 bits of precision for floating numbers. This level of precision is typically only encountered when performing an arithmetic operation like below:$ terraform console > 1 - 0.99 0.010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003The
Float64Attributeunderlying value of Go's built-infloat64type was losing this precision and responding with invalid plan value errors seen in #815 .Solution
This PR replaces the underlying value of
Float64Attributewith a*big.Floattype, which is already supported interraform-plugin-go. Semantic equality logic has also been implemented to ensure thatComputedvalues do not replace more precise prior values.