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Finish grammar

This commit is contained in:
Victor Fernandes 2017-02-21 13:48:10 -05:00
parent f3c285ec50
commit 6aad9b40de
1 changed files with 12 additions and 7 deletions
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19
PLATYPUS Grammar Specification.md
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@ -161,13 +161,13 @@
#### 3.2.2 Selection Statement (`if` statement)
```
<selection statement> ->
IF (<conditional expression>) THEN <statements>
IF (<conditional expression>) THEN <opt_statements>
ELSE {<opt_statements>};
```
#### 3.2.3 Iteration Statement (the loop statement)
```
<iteration statement> ->
<TBC>
USING (<assignment expression> , <conditional expression>, <assignment expression>) REPEAT { <opt_statements> };
```
#### 3.2.4 Input Statement
```
@ -180,7 +180,7 @@
#### 3.2.5 Output Statement
```
<output statement> ->
<TBC>
OUTPUT(<opt_variable list> | <opt_string literal>);
```
### 3.3 Expressions
#### 3.3.1 Arithmetic Expressions
@ -222,23 +222,27 @@
#### 3.3.3 Conditional Expression
```
<conditional expression> ->
<logical OR expression>
<conditional expression>
| <logical AND expression>
| <logical OR expression>
<logical OR expression> ->
<TBC>
<relational expression> .OR. <relational expression>
<logical AND expression> ->
<TBC>
<relational expression> .AND. <relational expression>
```
#### 3.3.4 Relational Expression
```
<relational expression> ->
<primary a_relational expression> == <primary a_relational expression>
| <primary a_relational expression> <= <primary a_relational expression>
| <primary a_relational expression> >= <primary a_relational expression>
| <primary a_relational expression> > <primary a_relational expression>
| <primary a_relational expression> < <primary a_relational expression>
| <primary s_relational expression> == <primary s_relational expression>
| <primary s_relational expression> <= <primary s_relational expression>
| <primary s_relational expression> >= <primary s_relational expression>
| <primary s_relational expression> > <primary s_relational expression>
| <primary s_relational expression> < <primary s_relational expression>
@ -248,5 +252,6 @@
| <variable identifier>
<primary s_relational expression> ->
<TBC>
<string variable identifier>
| <string literal>
```