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authorIvan Tham <[email protected]>2019-08-03 08:22:01 +0100
committerIvan Tham <[email protected]>2019-08-03 08:22:01 +0100
commitae36284d60b828869ede5a77343ccb307046b69a (patch)
tree6096e09a01b472e3415bf8a0401f198644a1089d /src/parse
parent3b630aa5cf2fd58b10bb8a24c9818fda1d5049af (diff)
Fix clippy lints
Diffstat (limited to 'src/parse')
-rw-r--r--src/parse/mod.rs44
1 files changed, 19 insertions, 25 deletions
diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index 5c85172..aa8bd4b 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -2,8 +2,8 @@
2 * Refer to LICENCE for more information. 2 * Refer to LICENCE for more information.
3 * */ 3 * */
4 4
5use crate::lex::Token;
6use crate::error::CalcError; 5use crate::error::CalcError;
6use crate::lex::Token;
7 7
8pub fn to_postfix(tokens: Vec<Token>) -> Result<Vec<Token>, CalcError> { 8pub fn to_postfix(tokens: Vec<Token>) -> Result<Vec<Token>, CalcError> {
9 let mut postfixed: Vec<Token> = vec![]; 9 let mut postfixed: Vec<Token> = vec![];
@@ -12,7 +12,7 @@ pub fn to_postfix(tokens: Vec<Token>) -> Result<Vec<Token>, CalcError> {
12 match token { 12 match token {
13 Token::Num(_) => { 13 Token::Num(_) => {
14 postfixed.push(token); 14 postfixed.push(token);
15 }, 15 }
16 Token::Function(_) => { 16 Token::Function(_) => {
17 op_stack.push(token); 17 op_stack.push(token);
18 } 18 }
@@ -34,14 +34,16 @@ pub fn to_postfix(tokens: Vec<Token>) -> Result<Vec<Token>, CalcError> {
34 Token::Function(_) => { 34 Token::Function(_) => {
35 postfixed.push(op_stack.pop().unwrap()); 35 postfixed.push(op_stack.pop().unwrap());
36 } 36 }
37 _ => { unreachable!(); } 37 _ => {
38 unreachable!();
39 }
38 } 40 }
39 } 41 }
40 op_stack.push(token); 42 op_stack.push(token);
41 }, 43 }
42 Token::LParen => { 44 Token::LParen => {
43 op_stack.push(token); 45 op_stack.push(token);
44 }, 46 }
45 Token::RParen => { 47 Token::RParen => {
46 let mut push_until_paren: bool = false; 48 let mut push_until_paren: bool = false;
47 while let Some(token) = op_stack.pop() { 49 while let Some(token) = op_stack.pop() {
@@ -69,43 +71,35 @@ pub fn eval_postfix(postfixed: Vec<Token>) -> Result<f64, CalcError> {
69 match token { 71 match token {
70 Token::Num(n) => { 72 Token::Num(n) => {
71 num_stack.push(n); 73 num_stack.push(n);
72 }, 74 }
73 Token::Operator(op) => { 75 Token::Operator(op) => {
74 if let Some(n2) = num_stack.pop() { 76 if let Some(n2) = num_stack.pop() {
75 if let Some(n1) = num_stack.pop() { 77 if let Some(n1) = num_stack.pop() {
76 num_stack.push(op.operate(n1, n2)?); 78 num_stack.push(op.operate(n1, n2)?);
77 } else { 79 } else {
78 return Err( 80 return Err(CalcError::Parser(
79 CalcError::Parser( 81 "Too many operators, Too little operands".to_string(),
80 format!("Too many operators, Too little operands") 82 ));
81 )
82 )
83 } 83 }
84 } else { 84 } else {
85 return Err( 85 return Err(CalcError::Parser(
86 CalcError::Parser( 86 "Too many operators, Too little operands".to_string(),
87 format!("Too many operators, Too little operands") 87 ));
88 )
89 )
90 } 88 }
91 }, 89 }
92 Token::Function(funct) => { 90 Token::Function(funct) => {
93 if let Some(arg) = num_stack.pop() { 91 if let Some(arg) = num_stack.pop() {
94 num_stack.push(funct.apply(arg)?) 92 num_stack.push(funct.apply(arg)?)
95 } 93 }
96 } 94 }
97 _ => { 95 _ => unreachable!("wut"),
98 unreachable!("wut")
99 }
100 } 96 }
101 } 97 }
102 if num_stack.len() == 1 { 98 if num_stack.len() == 1 {
103 Ok(num_stack.pop().unwrap()) 99 Ok(num_stack.pop().unwrap())
104 } else { 100 } else {
105 return Err( 101 Err(CalcError::Parser(
106 CalcError::Parser( 102 "Too many operators, Too little operands".to_string(),
107 format!("Too many operators, Too little operands") 103 ))
108 )
109 )
110 } 104 }
111} 105}