WIP borrowContract for FLIP #1071

[bluesign]

trafficstars

Closes FLIP #1071

Description

• Tests I have to figure out.
• Some parts I am not sure ( ensure loaded etc )
• Docs I will update after confirmed that I am on correct path

---

• [x] Targeted PR against master branch
• [X] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [X] Code follows the standards mentioned here
• [ ] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [ ] Added appropriate labels

[codecov[bot]]

Codecov Report

Merging #1934 (e27fe5a) into master (7e17bb8) will increase coverage by 0.20%. The diff coverage is 91.73%.

@@            Coverage Diff             @@
##           master    #1934      +/-   ##
==========================================
+ Coverage   77.75%   77.96%   +0.20%     
==========================================
  Files         305      308       +3     
  Lines       63629    64127     +498     
==========================================
+ Hits        49476    49995     +519     
+ Misses      12383    12334      -49     
- Partials     1770     1798      +28     

Flag	Coverage Δ
unittests	77.96% <91.73%> (+0.20%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
runtime/stdlib/account.go	86.44% <84.37%> (-0.07%)	:arrow_down:
runtime/interpreter/accountcontracts.go	77.46% <100.00%> (+0.65%)	:arrow_up:
runtime/sema/account_contracts.go	100.00% <100.00%> (ø)
runtime/sema/authaccount_contracts.go	100.00% <100.00%> (ø)
runtime/sema/public_account_contracts.go	100.00% <100.00%> (ø)
runtime/parser/declaration.go	83.52% <0.00%> (-0.54%)	:arrow_down:
runtime/parser/expression.go	90.18% <0.00%> (-0.12%)	:arrow_down:
runtime/sema/check_interface_declaration.go	96.48% <0.00%> (-0.02%)	:arrow_down:
tools/pretty/main.go	0.00% <0.00%> (ø)
runtime/sema/block.go	100.00% <0.00%> (ø)
... and 30 more

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[turbolent]

@bluesign Updated to master and added tests

[turbolent]

Only thing that's left is documentation

[turbolent]

FLIP has been approved: https://github.com/onflow/flow/pull/1071

[turbolent]

@bluesign Could you please open a follow-up PR for documenting this? Thank you!