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Victor Fernandes 2017-02-22 19:10:15 -05:00
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PLATYPUS Grammar Specification.md
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## 2. Lexical Specification (INCOMPLETE)
## NOTE: **This is incredibly incomplete and broken, I am simply writing this down and will fix it as I read along the informal language specification provided to me**
## NOTE:
**This is incomplete, I am simply writing this down and will fix it as I read along the informal language specification provided to me
This does not follow standard BNF/EBNF syntax, I will rewrite it once I get all the definitions correct and complete.**
### 2.1 Input Elements and Tokens
```
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<assignment operator> ->
=
```
## 3. The PLATYPUS Syntatic Specification
## 3. The PLATYPUS Syntactic Specification
### 3.1 PLATYPUS Program
```
<program> ->
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<assignment expression>
<assignment expression> ->
AVID = <arithmetic expression>
| SVID = <string expression>
<arithmetic variable identifier> = <arithmetic expression>
| <string variable identifier> = <string expression>
```
#### 3.2.2 Selection Statement (`if` statement)
```
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#### 3.3.3 Conditional Expression
```
// BNF from C specification
// (translated to PLATYPUS because it does not implement all of C's grammar)
// (adapted to PLATYPUS specification because it does not implement all of C's grammar)
// source: https://cs.wmich.edu/~gupta/teaching/cs4850/sumII06/The%20syntax%20of%20C%20in%20Backus-Naur%20form.htm
<conditional expression> ->
<logical OR expression>
<logical OR expression> ->
<logical AND expression>
| <logical OR expression> .OR. <relational expression>
| <logical OR expression> .OR. <logical AND expression>
<logical AND expression> ->
<relational expression>
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| <variable identifier>
<primary s_relational expression> ->
<string variable identifier>
| <string literal>
<string literal>
| <string variable identifier>
```