cs330_f2016:labw
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cs330_f2016:labw [2018/02/01 21:11] morse |
cs330_f2016:labw [2018/10/07 05:14] morse |
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| - | **This is a draft version of the assignment and may change until the due date of the preceding assignment. | ||
| - | ** | ||
| - | |||
| ====Objective:==== | ====Objective:==== | ||
| Line 9: | Line 6: | ||
| ====Pre-requisite:==== | ====Pre-requisite:==== | ||
| - | For this lab, you should have Julia 0.6+ installed, the same as for the rudimentary interpreter. You will need both the Lexer and Error modules. | + | For this lab, you should have Julia 1.0 installed, the same as for the rudimentary interpreter. You will need both the Lexer and Error modules. |
| ---- | ---- | ||
| Line 85: | Line 82: | ||
| (lambda x (+ x 1)) | (lambda x (+ x 1)) | ||
| or | or | ||
| - | (with x 5 (+ x 1)) | + | (with (x 5) (+ x 1)) |
| </code> | </code> | ||
| Line 134: | Line 131: | ||
| abstract type AE end | abstract type AE end | ||
| - | type NumNode <: AE | + | struct NumNode <: AE |
| n::Real | n::Real | ||
| end | end | ||
| - | type BinopNode <: AE | + | struct BinopNode <: AE |
| op::Function | op::Function | ||
| lhs::AE | lhs::AE | ||
| Line 144: | Line 141: | ||
| end | end | ||
| - | type If0Node <: AE | + | struct If0Node <: AE |
| condition::AE | condition::AE | ||
| zero_branch::AE | zero_branch::AE | ||
| Line 150: | Line 147: | ||
| end | end | ||
| - | type WithNode <: AE | + | struct WithNode <: AE |
| - | name::Symbol | + | sym::Symbol |
| binding_expr::AE | binding_expr::AE | ||
| body::AE | body::AE | ||
| end | end | ||
| - | type IdNode <: AE | + | struct VarRefNode <: AE |
| - | name::Symbol | + | sym::Symbol |
| end | end | ||
| - | type FunDefNode <: AE | + | struct FunDefNode <: AE |
| - | formal_parameter::Symbol | + | formal::Symbol |
| - | fun_body::AE | + | fun_body::AE |
| end | end | ||
| - | type FunAppNode <: AE | + | struct FunAppNode <: AE |
| - | fun_expr::AE | + | fun_expr::AE |
| - | arg_expr::AE | + | arg_expr::AE |
| end | end | ||
| - | |||
| - | # Rejigger our type hierarchy to better support return values | ||
| - | |||
| - | # Define both abstract types before we use them | ||
| abstract type RetVal end | abstract type RetVal end | ||
| Line 178: | Line 171: | ||
| abstract type Environment end | abstract type Environment end | ||
| - | type NumVal <: RetVal | + | struct NumVal <: RetVal |
| n::Real | n::Real | ||
| end | end | ||
| - | type ClosureVal <: RetVal | + | struct ClosureVal <: RetVal |
| - | param::Symbol | + | formal::Symbol |
| - | body::OWL | + | body::AE |
| - | env::Environment # this is the environment at definition time! | + | env::Environment |
| end | end | ||
| - | # Definitions for our environment data structures | + | struct EmptyEnv <: Environment |
| - | + | ||
| - | type mtEnv <: Environment | + | |
| end | end | ||
| - | type CEnvironment <: Environment | + | struct ExtendedEnv <: Environment |
| - | name::Symbol | + | sym::Symbol |
| - | value::RetVal | + | val::RetVal |
| parent::Environment | parent::Environment | ||
| end | end | ||
| Line 210: | Line 201: | ||
| <code Julia> | <code Julia> | ||
| - | function parse(expr::Array{Symbol or Real}) | + | function parse(expr::Any) |
| - | function calc(ast::OWL) | + | function calc(ast::AE) |
| </code> | </code> | ||
| Line 218: | Line 209: | ||
| **Conditionals:** | **Conditionals:** | ||
| - | The semantics of (if0 test then else) is: if the test evaluates to zero, then the entire expression evaluates to the result of then, otherwise, it evaluates to else. Evaluation should signal an error for non-numeric test values. | + | The semantics of (if0 test then else) is as follows: if the test evaluates to zero, then the entire expression evaluates to the result of then expression, otherwise, it evaluates to the result of the else expression. Evaluation should signal an error for non-numeric test values. |
| **Multi-argument fun** | **Multi-argument fun** | ||
cs330_f2016/labw.txt · Last modified: 2021/06/30 23:42 (external edit)
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